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    Meteorological Forcing Shapes Seasonal Surface Zooplankton Dynamics in Lake Karamurat, a Small Tectonic Lake in Türkiye
    (Mdpi, 2026) Gurbuzer, Pinar; Kulkoyluoglu, Okan; Altindag, Ahmet
    In temperate freshwater ecosystems, zooplankton play a crucial role in the pelagic food web and act as sensitive indicators of environmental change. They respond to shifts in water temperature, hydrodynamic mixing, and short-term meteorological events. This study investigated the epilimnetic zooplankton fauna of Lake Karamurat (Bolu, T & uuml;rkiye), a small tectonic temperate lake, with a specific focus on the influence of rainfall events and wind speed on community structure. The samples were taken seasonally and horizontally using a plankton net (55 mu m mesh size) and were analyzed alongside in situ physico-chemical measurements and meteorological data. In total, 74 zooplankton taxa were identified, comprising 54 rotifer species and 20 crustacean species (16 Cladocera and 4 Copepoda). Testudinella greeni was recorded for the first time in T & uuml;rkiye, representing a new addition to the Turkish Rotifera fauna. Multivariate analyses revealed that electrical conductivity, water temperature, dissolved oxygen, precipitation, and wind speed were key drivers shaping community composition. The findings suggest that wind-driven surface mixing and episodic rainfall events enhanced vertical redistribution, leading to dominance of rotifers and small-bodied cladocerans in the epilimnion. These findings underscore the critical role of sampling strategy in shallow lakes under dynamic conditions and provide new faunistic insights into the zooplankton diversity of Anatolian lakes.
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    Towards a Sustainable World: Diversity of Freshwater Gastropods in Relation to Environmental Factors-A Case in the Konya Closed Basin, Turkiye
    (Mdpi, 2022) Gumus, Burcin Askim; Gurbuzer, Pinar; Altindag, Ahmet
    The Konya Closed Basin (KCB) in Turkiye plays a key role in agricultural production and freshwater supply. However, the basin is impacted by humanly derived nitrogenous compounds and toxic metals. Keeping the water quality at a potable level in the basin is compulsory. This study was part of a project yielding monitoring of water quality in KCB in accordance with the Water Framework Directive (2000/60/EC). Eleven stations, except Beysehir Lake and Mamasin Dam, were sampled for the first time for freshwater molluscs. Community structure indexes and multivariate statistical analyses were applied to determine the microhabitats of gastropods and their responses to environmental changes. The structure and distribution of gastropod assemblages differed depending on total phosphate, total nitrogen, dissolved oxygen, and pH. This study revealed that most of the gastropods in KCB are relatively tolerant to biodegradable pollution. However, there is a strong observed decline in population size requiring intensive future monitoring; measures have to be taken to preserve the remaining populations. Two endemic species need an urgent action plan to protect their habitats: Theodoxus anatolicus of celtik Canal and Bithynia pseudemmericia of Beysehir Lake; a re-assessment of their extinction risk according to the IUCN rules is needed (2022). The results of this study will be useful for comparison with future studies to document potential improvements or continued ecological regression in the quality of aquatic ecosystems in the watershed.
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    Zooplankton Fauna of High Mountain Lake: Sarincof (camlihemsin, Rize, Turkey)
    (Kahramanmaras Sutcu Imam Univ Rektorlugu, 2023) Gurbuzer, Pinar; Altindag, Ahmet; Tekatli, Gulsah; Tekatli, Cagri
    In this study, which carried out on Sarincof Lake on 13 July 2021, 27 species from Rotifera, 6 from Cladocera, and 3 from Copepoda, belonging to zooplankton groups were identified in a total of 36 species. Among the identified species, Rotifers were the dominant group with a rate of 51 %. This was followed by Copepoda 28.3 % and Cladocera 20.7 %, respectively. The identified species are the first record for Sarincof Lake, which is the subject of the study.