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Görüneni̇n Ötesi̇nde: Mi̇kroplasti̇k, Çözünmüş Organi̇k Karbon Ve Sicakliğin Bakteri̇ Ve Si̇li̇yatlar Üzeri̇ne Etki̇si̇ni̇n İncelenmesi̇
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This thesis investigated the combined effects of microplastic pollution, allochthonous dissolved organic matter, and elevated water temperature on bacteria and ciliates in shallow lake ecosystems. The study aimed to untangle how these multiple human-induced and climate-driven stressors interact to affect microbial communities.
Shallow lake ecosystems face multiple stressors, including microplastic (MP) pollution, allochthonous dissolved organic matter (allo-DOM or tDOM) inputs, and the impact of climate change on water temperature. With the aim of investigating these human-induced and climate-driven impacts, this thesis discusses the indirect effects of microplastics on ciliates within a trophic cascade, the influence of pulsed allo-DOM with varying qualities on planktonic communities, and the combined effects of warming and terrestrial dissolved organic carbon (tDOC) on bacteria and ciliate dynamics. Through the use of mesocosm experiments, following conclusions were reached. For MP, larger particles were found to influence ciliate biomass and diversity by releasing them from crustacean zooplankton grazing. The allo-DOM experiment revealed that the quality of allo-DOM significantly regulated microbial community biomass and composition, with nonlinear responses (biomass increase followed by a decrease) in bacteria and ciliate dynamics. Lastly, the combined warming and tDOC experiment exhibited complex, non-linear responses in bacteria and ciliate communities where the impacts of tDOC dominated warming impacts on the overall response. Findings of this thesis contribute to a more comprehensive understanding of the complex interplay between anthropogenic influences and natural stressors in aquatic environments to which bacteria and ciliates were quite responsive, informing future research directions and management strategies.
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How climate change and eutrophication interact with microplastic pollution and sediment resuspension in shallow lakes: A review
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This review examines how climate change and eutrophication interact with and potentially amplify microplastic pollution and sediment resuspension in shallow lake ecosystems. The authors identify compounding threats to lake health and call for integrated research that considers these stressors together rather than in isolation.
Baski Altindaki̇ Siğ Göller: Gölleri̇n Küresel Deği̇şi̇me Verdi̇ği̇ Tepki̇yi̇ Yönlendi̇rmede Zooplanktonun Rolü, Bi̇r Mezokozm Yaklaşimi
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This thesis used mesocosm experiments to investigate how microplastic (MP) ingestion, terrestrial dissolved organic matter (tDOM) inputs, and warming interact to affect zooplankton communities in shallow lakes. While MP ingestion by zooplankton was low and species-specific, tDOM quality had complex bottom-up effects on zooplankton biomass and community composition, and warming combined with terrestrially derived dissolved organic carbon showed synergistic negative effects on zooplankton size and biomass.
Combined Exposure of Microplastics and Climate Warming Affects the Bacteria-Driven Macrophyte Litter Decomposition in an Urban Lake
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Researchers conducted a 30-day microcosm experiment to study how climate warming and polystyrene microplastics interact to affect plant litter decomposition in lake ecosystems. The study found that combined warming and high microplastic concentrations promoted litter decomposition by increasing bacterial biomass and diversity, but also raised concerns by boosting potentially harmful bacteria on microplastic surfaces.
Effects of microplastic particles on carbon source metabolism and bacterial community in freshwater lake sediments
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A microcosm experiment tested how four common plastic types affect carbon metabolism and bacterial communities in freshwater lake sediments, finding that microplastics disrupted microbial carbon cycling and altered community composition.
Microplastic sources and distribution dynamics across contrasting anthropogenic settings: implications for lake management
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Microplastic particles have emerged as a pervasive pollutant in lake ecosystems, with sources and distribution patterns varying significantly across different anthropogenic settings, affecting ecological processes and human health. Understanding how land use and human activity influence microplastic loading and spatial distribution in lakes is essential for developing targeted management strategies.
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