Difference between revisions of "Sand dune - Country Report, Turkey"
(Created page with "'''Original Authors:''' Turhan Uslu and Albert Salman, updated with a map derived from Turhan Uslu (http://www.turhanuslu.net/kumul1.php) by J Patrick Doody, December 2007 ==...")
Revision as of 12:19, 13 August 2016
Original Authors: Turhan Uslu and Albert Salman, updated with a map derived from Turhan Uslu (http://www.turhanuslu.net/kumul1.php) by J Patrick Doody, December 2007
The coastline of Turkey has a length of 8,333 km. Originally about 110 sand dune systems existed with a total length of 845 km (c10% of the Turkish coastline) and a total surface of 36,600 ha (0.046% of Turkey), but the systems were rapidly disappearing. There are some very old dune systems (including fossil dunes from early post-glacial periods), while others are still developing around river mouths.
DISTRIBUTION AND TYPE OF DUNE
Almost all the dune systems form in the immediate vicinity of rivers, sometimes as part of a large delta system. They may lie between the sea and lakes (lagoons). The west-east orientation of the main mountain chains has been important for the distribution of the dune systems. The high mountains of the Black Sea coast and the Toros Mountains along the Mediterranean, together with their big rivers, have resulted in large, mostly longshore sandbanks and dunes. These include the major systems of Çukurova and Göksu along the Mediterranean and Bafra and Çaramba along the Black Sea. The longest dune system is found around the Sakarya River and runs for approximately 55 km. Along the Aegean coast, most dune systems are formed in shallow bays.
Three very distinctive types of dunes are formed in deltas, on coastal plains and in bays. The maximum height (about 50 m) as well as the maximum width (4.3 km) is found in S.W. Turkey (Kalkan-Ovagelemi). Many different dune forms are present, e.g. huge beach plains with embryo dunes, parabolic dunes, blowouts, dune slacks, lakes, secondary barchans and many dune fields. Important halophytic areas, saltmarshes and lagoons are found in and around many dune sites. In the Mediterranean systems the calcium carbonate content is very high, while siliceous sands prevail along the Black Sea and Marmara.
At least 525 plant species are found in the dune areas (excluding saltmarshes). 23 of these are endemic species, while another 71 are rare or threatened with extinction. The vegetation is very xerophytic and includes many maquis species in the scrub zone. Many of the associations are also endemic, although only on north west Turkish coasts where there are 13 endemic associations. Almost all the communities are influenced by grazing, especially along the Mediterranean. In most of the areas the following zonation can be observed:
Strandline. Cakile maritima, Salsola kali, Euphorbia peplis and Xanthium strumarium (Cakiletea maritimae) is the predominant vegetation;
Foredune. The vegetation includes Ammophila arenaria, Eryngium maritimum, Medicago marina, Cyperus capitatus, Otanthus maritimus, Pancratium maritimum, Euphorbia paralias and Elymus farctus (Ammophiletea);
Dune grassland Heavily grazed, often cultivated, flat grasslands occur with Bromus tectorum, Hordeum murinum, Lagurus ovatus, Cynodon dactylon, Plantago cretica, Paronychia argentea and Asphodelus microcarpus;
Erica manipuliflora and E. arborea are the most frequent species;
These often species-rich areas include Trachomitum venetum, Inula viscosa, Schoenus nigricans, Holoschoenus vulgaris, Phyla nodiflora, Mentha aquatica, Orchis palustris and Phragmites australis;
In some areas, vegetation with species such as Sarcopoterium spinosum, Verbascum sinuatum and Lavandula stoechas occurs in lower areas in between dune ridges. More typically, the vegetation is composed of the Quercetea ilicis, which includes species such as Rhamnus oleoides, Pistacia lentiscus, Osyris alba, Myrtus communis, Phillyrea latifolia, Vitex agnus-castus, Nerium oleander and Daphne gnidioides;
Along the Mediterranean coasts Pinus brutia and P. pinea forest is normal. In northwest Turkey other types of woodland occur, for example with Juniperus oxycedrus ssp. macrocarpa.
In areas where salt water comes to the surface or where seawater influences the edge of the dune, a variety of halophytic vegetation occurs. This includes pioneer vegetation with Juncus maritimus, Salicornia europaea, Cressa cretica and Halocnemum strobulaceum; vegetation of halophytic plains with Phragmites australis, Juncus maritimus and Artemisia santonicum and saltmarsh proper with Arthrocnemum fruticosum, Limonium virgatum, Junçus acutus, Puccinellia convoluta and Aeluropus littoralis.
The map shows the distribution of the major coastal dune systems around 1970. The sites included in the list are over 100 ha and still relatively intact geomorphologically.
ITE NAME SIZE(ha) 01. Turunçlu - Dörtyol 861 02. Çukurova Delta 8073 03. Göksü Delta 1426 04. Finike-Yeniceköy 600 05. Kale-Beymelek 339 06. Gavuragili-Gelemis 1679 07. Tuzla 183 08. Dalyanköy-Poyraz 322 09. Bozcaada 200 10. Kumburnu 104 11. Abdürrahim 252 12. Bayramtepe-Esence 626 13. Durusu (Terkos) 2044 14. Akpinar 1409 15. Kumköy (Kilyos) 522 16. Karaagaç-Melen 1818 17. Sarikum 304 18. Alaçam-Balik Gölü 1879 19. Asaragac - Sakarli 2175 20. Ordu-Güngören 217
There is no information available on adjacent habitats or protected status for individual sites. An update of this information is available for a few sites:
The Kizilirmak Delta is located on the Black Sea shore in the province of Samsun in north Turkey. The dunes contain significant areas of Mediterranean shrubland;
The Göksu Delta is located at the mouth of the Göksu River on the Mediterranean Sea, between Silifke and Taşucu, in Içel Province on the eastern coast of Turkey;
The Akyatan Lagoon is located on the Mediterranean shore in the Karataş district in the province of Adana, 48 km south of the city of Adana.
From the Ramsar Sites Information Service @ http://www.wetlands.org/rsis/.