SEASONAL CHANGES OF SOME EPILITIC ALGAE IN AKÇAY (MUGLA-DENiZLi)

Öz

In this study, epilithic algae of Akcay were investigated between June 2001 and September 2002. for each preparation, approximately 200 diatom valves were caunted, according to their dominance values, these species were utilized by method of [1]. Thus, if the species were found in the preparations, but was not encountered, it was given an accepted value of "0,1". Then the percentage of each species in the community was calculated. After then, if frequency of the species was more than % 10, named as "dominant"; if this value was between % 1 and % 10, named as "present" and if it was less than % 1, as "exist". Also in our study, if dominance value of the species was between % 5 and % 10 % 10; it was named as "present" and if it was more than % 10, as "dominant". As a result, 75 diatom taxa were totally determinated. Among of these taxa, Cymbella affinis Kutzing (% 17,40) and Achnanthes minutissima Kutzing (% 16,06) were found as "dominant" , Denticula elegans Kutzing (% 9,82), Gomphonema olivaceum (Lyngbya) Ktitzing (% 9,04), Diatome vulgare Bory (% 7,20), Meridion circulare var. constricta Van Heurck (% 5,76), Gomphonema parvulum Kutzing (% 5,44), Synedra ulna (Nitszh) Ehrenberg (% 5,24), Navicula exigua (Greg) Muller (% 5,19) were found as "present". On the other hand, it was found that, dominance value of these taxa were % 81,15 in all taxa in this study.

Anahtar Kelimeler

• Akcay,Dominant,Diatom

AKCAY'DAKi (MUGLA-DENiZLi) BAZI EPiLiTiK DiYATOME TAKSONLARININ MEVsiMSEL GELiŞiMi

Öz

Bu cahsrnada Akcay'da tespit edilen epilitik diyatomelerin mevsimsel degisimleri Haziran 2001 ile Eylul 2002 tarihleri arasmda incelenrnistir. Her preparat uzerinde yaklasik 200 kabuk sayrlrrus, materyallerin baskmlik degeri acismdan tanimlanmasi [I] tarafmdan verilen metoda gore yapilrrusnr. Buna gore, bir takson orneklernede var, ancak sayrrnda crkrnarrus ise "0, I" degerini alrrusnr. Daha soma komunitede yer alan herbir turun yilzdesi hesaplanrrustir. Komunitede bir turun sikhk degeri % IO dan fazla ise "dominant", % I - IO arasmda ise "mevcut" ve % 1 den az ise "bulunur" olarak isimlendirilrnistir. Bu cahsmada da taksoni arm baskmlik degeri % 5 - IO arasmda ise "rnevcut" ve % IO dan fazla ise "dominant" olarak tarumlanrrustir.Yapilan arasnrrna sonucunda toplam 75 diyatome taksonu tespit edilmistir. Bu taksonlardan sirasiyla; Cymbella affinis Kutzing (% 17,40) ve Achnanthes minutissima Kutzing (% 16,06) run populasyonda "dominant" , Denticula elegans Kutzing (% 9,82), Gomphonema olivaceum (Lyngbya) Kutzing (% 9,04), Diatome vulgare Bory (% 7,20), Meridion circulare var. constricta Van Heurck (% 5,76), Gomphonema parvulum Kutzing (% 5,44), Synedra ulna (Nitszh) Ehrenberg (% 5,24), Navicula exigua (Greg) Miiller (% 5,19) run ise "mevcut" durumda oldugu ve bu taksonlann toplam baskmligmm % 81,15 oldugu tespit edilmistir.

Anahtar Kelimeler

• Akçay,Baskınlık,Diyatome

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