Zooplankton Biodiversity in Reservoirs of Different Geographical Regions of Turkey: Composition and Distribution Related with Some Environmental Conditions

Abstract

The zooplankton fauna and the relationship with their environmental variables were investigated on the epilimnion layer of the seven reservoirs (Demirdöven, Devegeçidi, Menzelet, Sır, Ömerli, Porsuk, Tahtalı) of different regions (Marmara, Aegean, Mediterranean, Central Anatolia, Eastern Anatolia, Southeastern Anatolia) throughout the summer months (2015) in Turkey. According to the trophic conditions reservoirs varied between oligo-and eutrophic status. Chlorophylla concentration, measured for the estimation of primary production, was determined considerably high along the investigation period. A total of 62 zooplankton species were identified with the contribution of 44 rotifers, nine cladocerans and nine copepods. Except one reservoir, all of the others were dominated by rotifera group, and also in each study site dominant taxa were changed at species level. On the other hand common dominant taxa for all reservoirs was the rotifer Polyarthra vulgaris Carlin, 1943 with 95 % frequency. In terms of zooplankton species, most of the studied reservoirs showed less than 50% similarities, due to their different limnological conditions and different geographic locations. Reservoirs in high trophic conditions in the present study were represented by low species diversity. Water quality in the reservoirs with respect to biological data were determined as ß-mesosaprobic. The using limnological and biological indices to determine water quality were consistent. Densities of main zooplankton groups, and also frequent species of the reservoirs correlated with epilimnion layer depths and total phoshorus concentrations significantly. On the other hand rotifera variation was affected mainly by physical variables (pH, temperature, dissolved oxygen concentration, conductivity), and crustacean variations were related with total phoshorus. The comperative assessment between limnological variables and zooplankton community in this reservoirs was studied for the first time.

Acı Su Özelliğindeki Bafa Gölü’nün Zooplankton Topluluk Yapısına Göre Trofik Durumunun Belirlenmesi

“…The similar results were obtained by Negreiros et al (2010) in Sapucai River; Saygı et al (2011) in Liman Lake; İsmail and Adnan (2016) in Harapan and Aman Lakes; and lastly Dorak et al (2019) in several reservoirs in Turkey.…”

A Preliminary Study on Using Rotifera Fauna to Determine The Trophic Level of The Büyükçekmece Reservoir (İstanbul, Turkey)

“…Among these reservoirs only the Büyükçekmece Reservoir is a natural water basin. Although limnological research was carried out for most of these reservoirs, the studies on the zooplankton fauna were only conducted for the Ömerli Reservoir (Kaplan, 1989;Altınyurt, 2006;Tarkan, 2010;Dorak et al, 2019) and the Büyükçekmece Reservoir (Aktan et al, 2006).…”

“…In another study carried out at the same reservoir in 2010 the results also showed eutrophic characteristics (Tarkan, 2010). However, in a recent study conducted in 2019 the physicochemical characteristics of the Ömerli Reservoir were as follows; the average temperature: 26.2 ºC, dissolved oxygen: 8.6 mg L -1 , pH: 8.5, conductivity: 320.4 μS cm -1 , transparency: 2 m, total phosphorous: 15.0 µg L -1 and chlorophyll a concentration: 11.1 µg L -1 and it was concluded that reservoir was in mesotrophic conditions (Dorak et al, 2019). 14 rotifer species found in this study were also detected at the Ömerli Reservoir namely A.…”

“…Due to these specifications K. cochlearis and P. vulgaris were found in almost all of the reservoirs in the Marmara Region. Also, these species were found in many reservoirs from different geographical regions and lakes in Turkey (Kaya and Altındağ, 2007;Ustaoğlu et al, 2012;Apaydın Yağcı, 2014;Saler and Alış, 2014;Apaydın Yağcı et al, 2015;Ergönül et al, 2016;Dorak et al, 2017;Dorak, 2019;Dorak et al, 2019).…”

Seasonal Distribution of Rotifera Compositions and Abundance in Kayalıköy Reservoir (Kırklareli/Turkey)

“…There are some studies in various reservoirs in Turkey related in particular Rotifera. (Kaya and Altındağ, 2007;Bozkurt and Sagat, 2008;Buyurgan et al, 2010;Ayvaz et al, 2011;Yıldız, 2012;Saler and Alış, 2014;Tuna and Ustaoğlu, 2016;Saler et al, 2017;Güher and Çolak 2015;Dorak et al, 2019;Dorak, 2019;Güher, 2019). However, the distribution and diversity of Rotifera of Kayalıköy reservoir has not been studied so far.…”