Mevlüt ALATAŞ, Güray UYAR, Tülay EZER, Muhammet ÖREN

Akyazı İlçesi'nin (Sakarya, Türkiye) Epifitik Briyofit Toplulukları: Topluluk-Habitat İlişkilerinin Çok Değişkenli Bir Çalışması

Bu çalışmada, Sakarya ili, Akyazı ilçesinin (Türkiye) epifitik briyofit vejetasyonu araştırılmıştır. 2017 yılının farklı vejetasyon dönemlerinde, ağaç gövdelerinden alınan toplam 85 örneklik alan, Braun-Blanquet metodu-kullanılarak sınıflandırılmış, Detrended Correspondence Analysis (DECORANA) ve Two-Way Indicator Species Analysis (TWINSPAN) kullanılarak da düzenlenmiştir. TWINSPAN sınıflandırma tekniği, üçüncü seviyede sekiz kümeyi içeren iki ana vejetasyon grubu üretmiştir. DECORANA sonuçları, epifitik toplulukların dağılım modellerinin, kurakçıldan nemliye taban ve üst bölgeler boyunca değiştiğini göstermiştir. Çalışma alanındaki epifitik topluluk farklılaşması için en önemli ekolojik faktör, ordinasyon diyagramına göre, epifitik habitatların nemidir. Sonuç olarak, yapılan bu çalışmada altı epifitik briyofit birliği ve iki alt birlik tespit edilmiştir. Bunlar arasından; Orthotrichetum pallentis Türkiye’den ikinci kez, Pterigynandretum filiformis -leucodontetosum sciuroidis ise Türkiye’den ilk kez kaydedilmiştir. Dahası, Orthotrichetum pallentis - isothecietosum alopecuroidis subass. nova, Sakarya ilinin Akyazı ilçesi'nden yeni bir epifitik altbirlik olarak tanımlanmıştır. Bu sintaksonların; nem, ışık, asidite gibi ekolojik ve floristik karakteristikleri detaylı açıklamalarıyla birlikte verilmiştir.

The Epiphytic Bryophyte Communities of Akyazı District (Sakarya, Turkey): A Multivariate Study of Community-Habitat Relationships

In this study, epiphytic bryophyte vegetation of the Akyazı District in Sakarya Province (Turkey) was investigated. In the different vegetation periods of the year 2017, a total of 85 relevés taken from the trunks of trees and were classified by Braun-Blanquet method and regulated by using Detrended Correspondence Analysis (DECORANA) and Two-Way Indicator Species Analysis (TWINSPAN). TWINSPAN classification technique produced two main vegetation groups include eight clusters at the third level. The results of DECORANA indicated that the distribution patterns of epiphytic communities change from xeric to mesic and along the lower base and upper zones. The most important ecological factor for the epiphytic community differentiation in the study area, according to the ordination diagram, is humidity of the epiphytic habitats. Consequently, six epiphytic bryophyte associations and two subassociations were determined in the present paper. Among them; Orthotrichetum pallentis for the second time and Pterigynandretum filiformis -leucodontetosum sciuroidis were recorded for the first time in Turkey. Moreover, Orthotrichetum pallentis - isothecietosum alopecuroidis subass. nova was described as a new epiphytic association from the Akyazı District of Sakarya Province. Floristic and ecological characteristics such as; (humidity, light, acidity) of these new syntaxa are given with detailed descriptions.

Keywords:

Association, Bryophyte DECORANA, Epiphytic, TWINSPAN, Turkey,

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