https://www.coastalwiki.org/w/index.php?title=PCBs_and_organochlorine_pesticides_in_Antarctic_algae&feed=atom&action=historyPCBs and organochlorine pesticides in Antarctic algae - Revision history2024-03-29T13:36:55ZRevision history for this page on the wikiMediaWiki 1.31.7https://www.coastalwiki.org/w/index.php?title=PCBs_and_organochlorine_pesticides_in_Antarctic_algae&diff=76116&oldid=prevDronkers J at 16:39, 5 November 20192019-11-05T16:39:42Z<p></p>
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</table>Dronkers Jhttps://www.coastalwiki.org/w/index.php?title=PCBs_and_organochlorine_pesticides_in_Antarctic_algae&diff=69604&oldid=prevDaphnisd at 12:24, 5 January 20152015-01-05T12:24:30Z<p></p>
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<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><u>'''Main results of the study'''</u></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><u>'''Main results of the study'''</u></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>The PCB contamination of oceanic particulate matter in the Antarctic waters is similar to the contamination in the North Sea (600-1200 ng/g dry weight). One would expect Antarctic waters to be less contaminated than the heavily polluted North Sea. This is indeed so when the concentration of PCBs is expressed per volume of sea water: the concentration of PCBs is 7 times higher in the North Sea (8,8 µg/<del class="diffchange diffchange-inline">l</del>) than in Antarctica (1,2 µg/<del class="diffchange diffchange-inline">l</del>). This leads to the paradoxical consequence that although the Antarctic ecosystem is seven times less polluted, the Antarctic wild life can be as (or even more) contaminated than wild live in the North Sea. This was confirmed at zooplankton level: the Antarctic zooplankton is equally contaminated as the North Sea zooplankton. <P>  </div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>The PCB contamination of oceanic particulate matter in the Antarctic waters is similar to the contamination in the North Sea (600-1200 ng/g dry weight). One would expect Antarctic waters to be less contaminated than the heavily polluted North Sea. This is indeed so when the concentration of PCBs is expressed per volume of sea water: the concentration of PCBs is 7 times higher in the North Sea (8,8 µg/<ins class="diffchange diffchange-inline">m³</ins>) than in Antarctica (1,2 µg/<ins class="diffchange diffchange-inline">m³</ins>). This leads to the paradoxical consequence that although the Antarctic ecosystem is seven times less polluted, the Antarctic wild life can be as (or even more) contaminated than wild live in the North Sea. This was confirmed at zooplankton level: the Antarctic zooplankton is equally contaminated as the North Sea zooplankton. <P>  </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The reason for this is that PCBs are insoluble and [[adsorption|adsorb]] to particles (organic matter). Due to the lower productivity in the Antarctic, less particles are available for the PCBs to adsorb on. The North Sea has a a high productivity, so the higher concentration of PCBs will be diluted over more particles. Therefore, the lower amount of particles in the Antarctic compensates for the lower PCB concentration. The zooplankton which feeds on this particulate matter will therefore accumulate a similar amount of PCBs.<P></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The reason for this is that PCBs are insoluble and [[adsorption|adsorb]] to particles (organic matter). Due to the lower productivity in the Antarctic, less particles are available for the PCBs to adsorb on. The North Sea has a a high productivity, so the higher concentration of PCBs will be diluted over more particles. Therefore, the lower amount of particles in the Antarctic compensates for the lower PCB concentration. The zooplankton which feeds on this particulate matter will therefore accumulate a similar amount of PCBs.<P></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Pesticides such as DDT were not detectable or only detected at low concentrations.<ref>[http://www.vliz.be/imis/imis.php?module=ref&refid=6888 Joiris, C.R.; Overloop, W. (1991). PCBs and organochlorine pesticides in phytoplankton and zooplankton in the Indian sector of the Southern ocean. Antarctic Science 3: 371-377]</ref></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Pesticides such as DDT were not detectable or only detected at low concentrations.<ref>[http://www.vliz.be/imis/imis.php?module=ref&refid=6888 Joiris, C.R.; Overloop, W. (1991). PCBs and organochlorine pesticides in phytoplankton and zooplankton in the Indian sector of the Southern ocean. Antarctic Science 3: 371-377]</ref></div></td></tr>
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</table>Daphnisdhttps://www.coastalwiki.org/w/index.php?title=PCBs_and_organochlorine_pesticides_in_Antarctic_algae&diff=57121&oldid=prevDaphnisd: /* References */2013-03-13T09:38:51Z<p><span dir="auto"><span class="autocomment">References</span></span></p>
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<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>[[Category:North Sea]]</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>[[Category:North Sea]]</div></td></tr>
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</table>Daphnisdhttps://www.coastalwiki.org/w/index.php?title=PCBs_and_organochlorine_pesticides_in_Antarctic_algae&diff=31481&oldid=prevDaphnisd at 08:24, 23 July 20092009-07-23T08:24:59Z<p></p>
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<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The PCB contamination of oceanic particulate matter in the Antarctic waters is similar to the contamination in the North Sea (600-1200 ng/g dry weight). One would expect Antarctic waters to be less contaminated than the heavily polluted North Sea. This is indeed so when the concentration of PCBs is expressed per volume of sea water: the concentration of PCBs is 7 times higher in the North Sea (8,8 µg/l) than in Antarctica (1,2 µg/l). This leads to the paradoxical consequence that although the Antarctic ecosystem is seven times less polluted, the Antarctic wild life can be as (or even more) contaminated than wild live in the North Sea. This was confirmed at zooplankton level: the Antarctic zooplankton is equally contaminated as the North Sea zooplankton. <P>  </div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The PCB contamination of oceanic particulate matter in the Antarctic waters is similar to the contamination in the North Sea (600-1200 ng/g dry weight). One would expect Antarctic waters to be less contaminated than the heavily polluted North Sea. This is indeed so when the concentration of PCBs is expressed per volume of sea water: the concentration of PCBs is 7 times higher in the North Sea (8,8 µg/l) than in Antarctica (1,2 µg/l). This leads to the paradoxical consequence that although the Antarctic ecosystem is seven times less polluted, the Antarctic wild life can be as (or even more) contaminated than wild live in the North Sea. This was confirmed at zooplankton level: the Antarctic zooplankton is equally contaminated as the North Sea zooplankton. <P>  </div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>The reason for this is that PCBs are insoluble and [[adsorption|adsorb]] to particles (organic matter). Due to the lower productivity in the Antarctic, less particles are available for the PCBs to adsorb on. The North Sea has a a high productivity, so the higher concentration of PCBs will be diluted over more particles. Therefore, the lower amount of particles in the Antarctic compensates for the lower PCB concentration. The zooplankton which feeds on this particulate matter will therefore accumulate <del class="diffchange diffchange-inline">the same </del>amount of PCBs.<P></div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>The reason for this is that PCBs are insoluble and [[adsorption|adsorb]] to particles (organic matter). Due to the lower productivity in the Antarctic, less particles are available for the PCBs to adsorb on. The North Sea has a a high productivity, so the higher concentration of PCBs will be diluted over more particles. Therefore, the lower amount of particles in the Antarctic compensates for the lower PCB concentration. The zooplankton which feeds on this particulate matter will therefore accumulate <ins class="diffchange diffchange-inline">a similar </ins>amount of PCBs.<P></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Pesticides such as DDT were not detectable or only detected at low concentrations.<ref>[http://www.vliz.be/imis/imis.php?module=ref&refid=6888 Joiris, C.R.; Overloop, W. (1991). PCBs and organochlorine pesticides in phytoplankton and zooplankton in the Indian sector of the Southern ocean. Antarctic Science 3: 371-377]</ref></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Pesticides such as DDT were not detectable or only detected at low concentrations.<ref>[http://www.vliz.be/imis/imis.php?module=ref&refid=6888 Joiris, C.R.; Overloop, W. (1991). PCBs and organochlorine pesticides in phytoplankton and zooplankton in the Indian sector of the Southern ocean. Antarctic Science 3: 371-377]</ref></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
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</table>Daphnisdhttps://www.coastalwiki.org/w/index.php?title=PCBs_and_organochlorine_pesticides_in_Antarctic_algae&diff=31311&oldid=prevDaphnisd at 09:05, 20 July 20092009-07-20T09:05:51Z<p></p>
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<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><references/></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><references/></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"></ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"></ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">[[Category:North Sea]]</ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">[[Category:Coastal and marine pollution]]</ins></div></td></tr>
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</table>Daphnisdhttps://www.coastalwiki.org/w/index.php?title=PCBs_and_organochlorine_pesticides_in_Antarctic_algae&diff=31266&oldid=prevDaphnisd at 08:06, 20 July 20092009-07-20T08:06:37Z<p></p>
<table class="diff diff-contentalign-left" data-mw="interface">
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<tr class="diff-title" lang="en">
<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">← Older revision</td>
<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">Revision as of 08:06, 20 July 2009</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l13" >Line 13:</td>
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<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><u>'''Main results of the study'''</u></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><u>'''Main results of the study'''</u></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>The PCB contamination of oceanic particulate matter <del class="diffchange diffchange-inline">is of the same order of magnitude </del>in the Antarctic waters <del class="diffchange diffchange-inline">as </del>in the North Sea (600-1200 ng/g dry weight). One would expect Antarctic waters to be less contaminated than the heavily polluted North Sea. This is <del class="diffchange diffchange-inline">confirmed </del>when the concentration of PCBs is expressed per volume of sea water: the concentration of PCBs is 7 times higher in the North Sea (8,8 µg/l) than in Antarctica (1,2 µg/l). This leads to the paradoxical consequence that although the Antarctic ecosystem is seven times less <del class="diffchange diffchange-inline">poluted</del>, the Antarctic wild life can be as (or even more) contaminated than in the North Sea. This was confirmed at zooplankton level: the Antarctic zooplankton is equally contaminated as the North Sea zooplankton. <P>  </div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>The PCB contamination of oceanic particulate matter in the Antarctic waters <ins class="diffchange diffchange-inline">is similar to the contamination </ins>in the North Sea (600-1200 ng/g dry weight). One would expect Antarctic waters to be less contaminated than the heavily polluted North Sea. This is <ins class="diffchange diffchange-inline">indeed so </ins>when the concentration of PCBs is expressed per volume of sea water: the concentration of PCBs is 7 times higher in the North Sea (8,8 µg/l) than in Antarctica (1,2 µg/l). This leads to the paradoxical consequence that although the Antarctic ecosystem is seven times less <ins class="diffchange diffchange-inline">polluted</ins>, the Antarctic wild life can be as (or even more) contaminated than <ins class="diffchange diffchange-inline">wild live </ins>in the North Sea. This was confirmed at zooplankton level: the Antarctic zooplankton is equally contaminated as the North Sea zooplankton. <P>  </div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>The reason for this is that PCBs are insoluble and [[adsorption|adsorb]] to particles (organic matter). Due to the lower productivity in the Antarctic, less particles are available for the PCBs to adsorb on. <del class="diffchange diffchange-inline">In the </del>North Sea<del class="diffchange diffchange-inline">, where there is </del>a high productivity, so the higher concentration of PCBs will be diluted over more particles. Therefore, the lower amount of particles in the Antarctic compensates for the lower PCB concentration. The zooplankton which feeds on this particulate matter will therefore accumulate the same amount of PCBs.<P></div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>The reason for this is that PCBs are insoluble and [[adsorption|adsorb]] to particles (organic matter). Due to the lower productivity in the Antarctic, less particles are available for the PCBs to adsorb on. <ins class="diffchange diffchange-inline">The </ins>North Sea <ins class="diffchange diffchange-inline">has a </ins>a high productivity, so the higher concentration of PCBs will be diluted over more particles. Therefore, the lower amount of particles in the Antarctic compensates for the lower PCB concentration. The zooplankton which feeds on this particulate matter will therefore accumulate the same amount of PCBs.<P></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Pesticides such as DDT were not detectable or only detected at low concentrations.<ref>[http://www.vliz.be/imis/imis.php?module=ref&refid=6888 Joiris, C.R.; Overloop, W. (1991). PCBs and organochlorine pesticides in phytoplankton and zooplankton in the Indian sector of the Southern ocean. Antarctic Science 3: 371-377]</ref></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Pesticides such as DDT were not detectable or only detected at low concentrations.<ref>[http://www.vliz.be/imis/imis.php?module=ref&refid=6888 Joiris, C.R.; Overloop, W. (1991). PCBs and organochlorine pesticides in phytoplankton and zooplankton in the Indian sector of the Southern ocean. Antarctic Science 3: 371-377]</ref></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==References==</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==References==</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><references/></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><references/></div></td></tr>
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</table>Daphnisdhttps://www.coastalwiki.org/w/index.php?title=PCBs_and_organochlorine_pesticides_in_Antarctic_algae&diff=30972&oldid=prevDaphnisd at 07:53, 16 July 20092009-07-16T07:53:08Z<p></p>
<table class="diff diff-contentalign-left" data-mw="interface">
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<col class="diff-marker" />
<col class="diff-content" />
<tr class="diff-title" lang="en">
<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">← Older revision</td>
<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">Revision as of 07:53, 16 July 2009</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l14" >Line 14:</td>
<td colspan="2" class="diff-lineno">Line 14:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The PCB contamination of oceanic particulate matter is of the same order of magnitude in the Antarctic waters as in the North Sea (600-1200 ng/g dry weight). One would expect Antarctic waters to be less contaminated than the heavily polluted North Sea. This is confirmed when the concentration of PCBs is expressed per volume of sea water: the concentration of PCBs is 7 times higher in the North Sea (8,8 µg/l) than in Antarctica (1,2 µg/l). This leads to the paradoxical consequence that although the Antarctic ecosystem is seven times less poluted, the Antarctic wild life can be as (or even more) contaminated than in the North Sea. This was confirmed at zooplankton level: the Antarctic zooplankton is equally contaminated as the North Sea zooplankton. <P>  </div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The PCB contamination of oceanic particulate matter is of the same order of magnitude in the Antarctic waters as in the North Sea (600-1200 ng/g dry weight). One would expect Antarctic waters to be less contaminated than the heavily polluted North Sea. This is confirmed when the concentration of PCBs is expressed per volume of sea water: the concentration of PCBs is 7 times higher in the North Sea (8,8 µg/l) than in Antarctica (1,2 µg/l). This leads to the paradoxical consequence that although the Antarctic ecosystem is seven times less poluted, the Antarctic wild life can be as (or even more) contaminated than in the North Sea. This was confirmed at zooplankton level: the Antarctic zooplankton is equally contaminated as the North Sea zooplankton. <P>  </div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>The reason for this is that PCBs are insoluble and [[adsorption|adsorb]] to particles (organic matter). Due to the lower productivity in the Antarctic, less particles are available for the PCBs to adsorb on. In the North Sea, where there is a high productivity, so the higher concentration of PCBs will be diluted over more particles. Therefore, the lower amount of particles in the Antarctic compensates for the lower PCB concentration. The zooplankton which feeds on this particulate matter will therefore accumulate the same amount of PCBs.</div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>The reason for this is that PCBs are insoluble and [[adsorption|adsorb]] to particles (organic matter). Due to the lower productivity in the Antarctic, less particles are available for the PCBs to adsorb on. In the North Sea, where there is a high productivity, so the higher concentration of PCBs will be diluted over more particles. Therefore, the lower amount of particles in the Antarctic compensates for the lower PCB concentration. The zooplankton which feeds on this particulate matter will therefore accumulate the same amount of PCBs.<ins class="diffchange diffchange-inline"><P></ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Pesticides such as DDT were not detectable or only detected at low concentrations.<ref>[http://www.vliz.be/imis/imis.php?module=ref&refid=6888 Joiris, C.R.; Overloop, W. (1991). PCBs and organochlorine pesticides in phytoplankton and zooplankton in the Indian sector of the Southern ocean. Antarctic Science 3: 371-377]</ref></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Pesticides such as DDT were not detectable or only detected at low concentrations.<ref>[http://www.vliz.be/imis/imis.php?module=ref&refid=6888 Joiris, C.R.; Overloop, W. (1991). PCBs and organochlorine pesticides in phytoplankton and zooplankton in the Indian sector of the Southern ocean. Antarctic Science 3: 371-377]</ref></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==References==</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==References==</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><references/></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><references/></div></td></tr>
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</table>Daphnisdhttps://www.coastalwiki.org/w/index.php?title=PCBs_and_organochlorine_pesticides_in_Antarctic_algae&diff=30971&oldid=prevDaphnisd at 07:51, 16 July 20092009-07-16T07:51:53Z<p></p>
<table class="diff diff-contentalign-left" data-mw="interface">
<col class="diff-marker" />
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<col class="diff-marker" />
<col class="diff-content" />
<tr class="diff-title" lang="en">
<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">← Older revision</td>
<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">Revision as of 07:51, 16 July 2009</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l14" >Line 14:</td>
<td colspan="2" class="diff-lineno">Line 14:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The PCB contamination of oceanic particulate matter is of the same order of magnitude in the Antarctic waters as in the North Sea (600-1200 ng/g dry weight). One would expect Antarctic waters to be less contaminated than the heavily polluted North Sea. This is confirmed when the concentration of PCBs is expressed per volume of sea water: the concentration of PCBs is 7 times higher in the North Sea (8,8 µg/l) than in Antarctica (1,2 µg/l). This leads to the paradoxical consequence that although the Antarctic ecosystem is seven times less poluted, the Antarctic wild life can be as (or even more) contaminated than in the North Sea. This was confirmed at zooplankton level: the Antarctic zooplankton is equally contaminated as the North Sea zooplankton. <P>  </div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The PCB contamination of oceanic particulate matter is of the same order of magnitude in the Antarctic waters as in the North Sea (600-1200 ng/g dry weight). One would expect Antarctic waters to be less contaminated than the heavily polluted North Sea. This is confirmed when the concentration of PCBs is expressed per volume of sea water: the concentration of PCBs is 7 times higher in the North Sea (8,8 µg/l) than in Antarctica (1,2 µg/l). This leads to the paradoxical consequence that although the Antarctic ecosystem is seven times less poluted, the Antarctic wild life can be as (or even more) contaminated than in the North Sea. This was confirmed at zooplankton level: the Antarctic zooplankton is equally contaminated as the North Sea zooplankton. <P>  </div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>The reason for this is that PCBs are insoluble and [[adsorption|adsorb]] to particles (organic matter). Due to the lower productivity in the Antarctic, less particles are available for the PCBs to adsorb on. In the North Sea, where there is a high productivity, so the higher concentration of PCBs will be diluted over more particles. Therefore, the lower amount of particles <del class="diffchange diffchange-inline">(number/l) </del>compensates for the lower PCB concentration <del class="diffchange diffchange-inline">(expressed as µg/l)</del>. The zooplankton which feeds on this particulate matter will therefore accumulate the same amount of PCBs.</div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>The reason for this is that PCBs are insoluble and [[adsorption|adsorb]] to particles (organic matter). Due to the lower productivity in the Antarctic, less particles are available for the PCBs to adsorb on. In the North Sea, where there is a high productivity, so the higher concentration of PCBs will be diluted over more particles. Therefore, the lower amount of particles <ins class="diffchange diffchange-inline">in the Antarctic </ins>compensates for the lower PCB concentration. The zooplankton which feeds on this particulate matter will therefore accumulate the same amount of PCBs.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Pesticides such as DDT were not detectable or only detected at low concentrations.<ref>[http://www.vliz.be/imis/imis.php?module=ref&refid=6888 Joiris, C.R.; Overloop, W. (1991). PCBs and organochlorine pesticides in phytoplankton and zooplankton in the Indian sector of the Southern ocean. Antarctic Science 3: 371-377]</ref></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Pesticides such as DDT were not detectable or only detected at low concentrations.<ref>[http://www.vliz.be/imis/imis.php?module=ref&refid=6888 Joiris, C.R.; Overloop, W. (1991). PCBs and organochlorine pesticides in phytoplankton and zooplankton in the Indian sector of the Southern ocean. Antarctic Science 3: 371-377]</ref></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==References==</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==References==</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><references/></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><references/></div></td></tr>
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</table>Daphnisdhttps://www.coastalwiki.org/w/index.php?title=PCBs_and_organochlorine_pesticides_in_Antarctic_algae&diff=30970&oldid=prevDaphnisd at 07:49, 16 July 20092009-07-16T07:49:51Z<p></p>
<table class="diff diff-contentalign-left" data-mw="interface">
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<col class="diff-marker" />
<col class="diff-content" />
<tr class="diff-title" lang="en">
<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">← Older revision</td>
<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">Revision as of 07:49, 16 July 2009</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l14" >Line 14:</td>
<td colspan="2" class="diff-lineno">Line 14:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The PCB contamination of oceanic particulate matter is of the same order of magnitude in the Antarctic waters as in the North Sea (600-1200 ng/g dry weight). One would expect Antarctic waters to be less contaminated than the heavily polluted North Sea. This is confirmed when the concentration of PCBs is expressed per volume of sea water: the concentration of PCBs is 7 times higher in the North Sea (8,8 µg/l) than in Antarctica (1,2 µg/l). This leads to the paradoxical consequence that although the Antarctic ecosystem is seven times less poluted, the Antarctic wild life can be as (or even more) contaminated than in the North Sea. This was confirmed at zooplankton level: the Antarctic zooplankton is equally contaminated as the North Sea zooplankton. <P>  </div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The PCB contamination of oceanic particulate matter is of the same order of magnitude in the Antarctic waters as in the North Sea (600-1200 ng/g dry weight). One would expect Antarctic waters to be less contaminated than the heavily polluted North Sea. This is confirmed when the concentration of PCBs is expressed per volume of sea water: the concentration of PCBs is 7 times higher in the North Sea (8,8 µg/l) than in Antarctica (1,2 µg/l). This leads to the paradoxical consequence that although the Antarctic ecosystem is seven times less poluted, the Antarctic wild life can be as (or even more) contaminated than in the North Sea. This was confirmed at zooplankton level: the Antarctic zooplankton is equally contaminated as the North Sea zooplankton. <P>  </div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>The reason for this is that PCBs are insoluble and [[adsorption|adsorb]] to particles (organic matter). Due to the lower productivity in the Antarctic, less particles are available for the PCBs to adsorb on. In the North Sea, where there is a high productivity, the higher concentration of PCBs will be diluted over more particles. Therefore, the lower amount of particles (number/l) compensates for the lower PCB concentration (expressed as µg/l). The zooplankton which feeds on this particulate matter will therefore accumulate the same amount of PCBs.</div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>The reason for this is that PCBs are insoluble and [[adsorption|adsorb]] to particles (organic matter). Due to the lower productivity in the Antarctic, less particles are available for the PCBs to adsorb on. In the North Sea, where there is a high productivity, <ins class="diffchange diffchange-inline">so </ins>the higher concentration of PCBs will be diluted over more particles. Therefore, the lower amount of particles (number/l) compensates for the lower PCB concentration (expressed as µg/l). The zooplankton which feeds on this particulate matter will therefore accumulate the same amount of PCBs.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Pesticides such as DDT were not detectable or only detected at low concentrations.<ref>[http://www.vliz.be/imis/imis.php?module=ref&refid=6888 Joiris, C.R.; Overloop, W. (1991). PCBs and organochlorine pesticides in phytoplankton and zooplankton in the Indian sector of the Southern ocean. Antarctic Science 3: 371-377]</ref></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Pesticides such as DDT were not detectable or only detected at low concentrations.<ref>[http://www.vliz.be/imis/imis.php?module=ref&refid=6888 Joiris, C.R.; Overloop, W. (1991). PCBs and organochlorine pesticides in phytoplankton and zooplankton in the Indian sector of the Southern ocean. Antarctic Science 3: 371-377]</ref></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==References==</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==References==</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><references/></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><references/></div></td></tr>
<!-- diff cache key wiki:diff::1.12:old-30969:rev-30970 -->
</table>Daphnisdhttps://www.coastalwiki.org/w/index.php?title=PCBs_and_organochlorine_pesticides_in_Antarctic_algae&diff=30969&oldid=prevDaphnisd at 07:48, 16 July 20092009-07-16T07:48:46Z<p></p>
<table class="diff diff-contentalign-left" data-mw="interface">
<col class="diff-marker" />
<col class="diff-content" />
<col class="diff-marker" />
<col class="diff-content" />
<tr class="diff-title" lang="en">
<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">← Older revision</td>
<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">Revision as of 07:48, 16 July 2009</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l14" >Line 14:</td>
<td colspan="2" class="diff-lineno">Line 14:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The PCB contamination of oceanic particulate matter is of the same order of magnitude in the Antarctic waters as in the North Sea (600-1200 ng/g dry weight). One would expect Antarctic waters to be less contaminated than the heavily polluted North Sea. This is confirmed when the concentration of PCBs is expressed per volume of sea water: the concentration of PCBs is 7 times higher in the North Sea (8,8 µg/l) than in Antarctica (1,2 µg/l). This leads to the paradoxical consequence that although the Antarctic ecosystem is seven times less poluted, the Antarctic wild life can be as (or even more) contaminated than in the North Sea. This was confirmed at zooplankton level: the Antarctic zooplankton is equally contaminated as the North Sea zooplankton. <P>  </div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>The PCB contamination of oceanic particulate matter is of the same order of magnitude in the Antarctic waters as in the North Sea (600-1200 ng/g dry weight). One would expect Antarctic waters to be less contaminated than the heavily polluted North Sea. This is confirmed when the concentration of PCBs is expressed per volume of sea water: the concentration of PCBs is 7 times higher in the North Sea (8,8 µg/l) than in Antarctica (1,2 µg/l). This leads to the paradoxical consequence that although the Antarctic ecosystem is seven times less poluted, the Antarctic wild life can be as (or even more) contaminated than in the North Sea. This was confirmed at zooplankton level: the Antarctic zooplankton is equally contaminated as the North Sea zooplankton. <P>  </div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>The reason for this is that PCBs are insoluble and [[adsorption|adsorb]] to particles (organic matter). Due to the lower productivity in the Antarctic, less particles are available for the PCBs to adsorb on. Therefore, the lower amount of particles (number/l) compensates for the lower PCB concentration (expressed as µg/l). The zooplankton which feeds on this particulate matter will therefore accumulate the same amount of PCBs.</div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>The reason for this is that PCBs are insoluble and [[adsorption|adsorb]] to particles (organic matter). Due to the lower productivity in the Antarctic, less particles are available for the PCBs to adsorb on<ins class="diffchange diffchange-inline">. In the North Sea, where there is a high productivity, the higher concentration of PCBs will be diluted over more particles</ins>. Therefore, the lower amount of particles (number/l) compensates for the lower PCB concentration (expressed as µg/l). The zooplankton which feeds on this particulate matter will therefore accumulate the same amount of PCBs.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Pesticides such as DDT were not detectable or only detected at low concentrations.<ref>[http://www.vliz.be/imis/imis.php?module=ref&refid=6888 Joiris, C.R.; Overloop, W. (1991). PCBs and organochlorine pesticides in phytoplankton and zooplankton in the Indian sector of the Southern ocean. Antarctic Science 3: 371-377]</ref></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Pesticides such as DDT were not detectable or only detected at low concentrations.<ref>[http://www.vliz.be/imis/imis.php?module=ref&refid=6888 Joiris, C.R.; Overloop, W. (1991). PCBs and organochlorine pesticides in phytoplankton and zooplankton in the Indian sector of the Southern ocean. Antarctic Science 3: 371-377]</ref></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==References==</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>==References==</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><references/></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><references/></div></td></tr>
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</table>Daphnisd