PJB-2016-258
EVALUATIONS OF EPILITHIC DIATOMS AND BIOTIC INDEX IN SAKARYA RIVER, TURKEY
ARZU MORKOYUNLU YÜCE1* AND ARİF GÖNÜLOL
Abstract
Diversity and ecology in the diatoms of Sakarya River were investigated between October 2009 - September 2010. As a result, Navicula radiosa Kütz was the dominant taxa at the first and fourth stations. Gomphonema olivaceum (Horrn.) Brébisson, Craticula cuspidata (Kütz.) D.G. Mann, Rhoicosphaenia abbreviata (C. Agardh) Lange-Bertalot, and Nitzschia recta Hantzsch ex Rabenhorst taxa were found to be widespread throughout the research. Significant correlation was identified between SI and DI-CH and between TI and DI-CH in the epilithic diatoms. The minimum correlation was identified between SI and TI. Based on the assessments, according to SI, the fourth station was classified as II-III quality class, or critically polluted. Other stations were classified as II quality class, or moderately polluted. According to TI, the first station was determined to be II-III (mesotroph-eutroph) quality class. Second, third and fourth stations were found to be III (polytroph) quality class. According to DI-CH, the fourth station was classified as quality class IV (moderately polluted), while the first, second and third stations were determined as III (less polluted) quality class. The environmental variables on the RDA diagram were selected (p
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