Composition and Distribution of Benthic Diatoms in Different Habitats of Burdur River Basin

Öz

Diatoms constitute an essential component for biomonitoring studies to determine the ecological

quality of waterbodies. In this study, benthic diatoms of Burdur River Basin were investigated as a

consequence of a project on river basin management plan. This is the first detailed taxonomical study

of diatoms taken from 13 streams, 4 lakes and 6 reservoirs of Burdur River Basin and a total of 223 taxa

have been observed. Among genera, Navicula Bory (27) and Nitzschia Hassal (27) were represented

with the highest numbers of taxa and followed by Gomphonema Agardh with a total of 22 species.

Navicula antonii Lange-Bertalot and Nitzschia palea var. debilis (Kützing) Grunow had the highest

relative abundance with 17.1% and 15.5% respectively. As a closed basin, salinity varied greatly from

fresh to saline water between the sampling stations and diatom composition contained species with a

different tolerance level. Navicula antonii and Nitzschia frustulum (Kützing) Grunow observed in all

habitats indicating their euryhaline characters; however Navicula digitoconvergens was only detected

in saline Acıgöl lake with a high relative abundance (38%) in autumn. Other two dominant species

were Halamphora coffeiformis (Kützing) Levkov and Navicula cincta (Ehrenberg) Ralfs in Acıgöl lake

showing their tolerance to high salt content as a brackish species. According to first results, 11 species

were new records for Turkish diatom flora. The high biodiversity of diatoms revealed the presence of

different habitat characteristics within the basin. These results are an important contribution of Turkish

diatom flora and could be useful for monitoring specific areas like Burdur River Basin.

Anahtar Kelimeler

• Burdur River Basin,diatoms,phytobenthos,salinity tolerance

Kaynakça

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