CSIRO PUBLISHING Marine and Freshwater Research, 2018, 69, 1453–1471 https://doi.org/10.1071/MF17270 Spatial and temporal variation in food web structure of an impounded river in Anatolia Nehir KaymakA,G, Kirk O. WinemillerB, Senol AkinC, Zekeriya AltunerD, Fatih PolatE and Tarik DalF AFaculty of Science, Department of Biology, Akdeniz University, Dumlupınar Boulevard, Campus, TR-07058 Antalya, Turkey. BProgram in Ecology and Evolutionary Biology and Department of Wildlife and Fisheries Sciences, Texas A&M University, 400 Bizzell Street, College Station, TX 77843-2258, USA. CFaculty of Agriculture, Department of Fisheries, Bozok University, Atatu¨rk Street kilometre 7, TR-66900 Yozgat, Turkey. DFaculty of Art and Science, Department of Biology, Gaziosmanpasa University, Tas-lıc¸iftlik Campus, TR-60240 Tokat, Turkey. EAlmus Vocational School, Department of Environmental Protection and Control, Gaziosmanpasa University, C¸ evreli Avenue, Almus, TR-60900 Tokat, Turkey. FAlmus Vocational School, Department of Aquaculture, Gaziosmanpasa University, C¸ evreli Avenue, Almus, TR-60900 Tokat, Turkey. GCorresponding author. Email:
[email protected] Abstract. Dams interrupt the longitudinal connectivity of rivers by impeding the movement of water, sediments and organisms, which, in turn, could affect aquatic biodiversity and food web ecology. Using stable isotope analysis, we examined spatiotemporal variation in food web structure at four sites in the upper Yes-ilırmak River, Anatolia Peninsula, Turkey, in relation to environmental parameters