Kurtul Irmak, Haubrock Phillip J, Kaya Cüneyt, Aksu Sadi, İlhan Ali, Sari Hasan M, Aygen Cem, Soto Ismael, Parker Ben, Britton Robert, Tarkan Ali Serhan
Marine and Inland Waters Sciences and Technology Department, Faculty of Fisheries, Ege University, Bornova, Izmir, Türkiye.
Department of Life and Environmental Sciences, Faculty of Science and Technology, Bournemouth University, Poole, Dorset, UK.
Sci Rep. 2025 Aug 13;15(1):29647. doi: 10.1038/s41598-025-14709-2.
The significance of long-term biodiversity monitoring studies for the protection of natural biodiversity and human well-being is well recognised by the Turkish scientific community. Despite understanding the ecological importance of freshwater ecosystems, spatially or temporally congruent studies using high resolution biodiversity monitoring data from Turkish freshwater resources remain scarce. To determine a biodiversity baseline for future studies, biological and environmental sampling was carried out in 15 different locations from the highly anthropogenically impacted Bakırçay River and its catchment in Western Anatolia between 2017 and 2018. A total of 17 fish species from 10 families were recorded, belonging mainly to the Cyprinidae and Leuciscidae families. These included six non-native, six regionally endemic, and five native species. The endangered endemic Alburnus attalus was the most widespread species, whereas several non-native species were restricted to single sites. Patterns in community composition were primarily associated with pH and stream order. However, community metrics such as species richness, Pielou's evenness, and the Shannon-Wiener diversity index were not significant. Intensifying anthropogenic activity within the Bakırçay basin suggests that sources of pollution and other detrimental stressors like non-native species should be managed to protect riverine biodiversity and maintain the provision of ecosystem services. Our findings therefore not only present a baseline for future studies on fish biodiversity and community composition, but also the possible onset of future monitoring studies in the region. Our findings underline the importance of long-term biomonitoring studies for the conservation of Türkiye's freshwater ecosystems to monitor changes occurring over time.
土耳其科学界充分认识到长期生物多样性监测研究对保护自然生物多样性和人类福祉的重要性。尽管了解淡水生态系统的生态重要性，但利用来自土耳其淡水资源的高分辨率生物多样性监测数据进行的空间或时间上一致的研究仍然很少。为了确定未来研究的生物多样性基线，2017年至2018年期间，在安纳托利亚西部受人类活动影响严重的巴克尔恰伊河及其集水区的15个不同地点进行了生物和环境采样。共记录了来自10个科的17种鱼类，主要属于鲤科和雅罗鱼科。其中包括6种非本地物种、6种区域特有物种和5种本地物种。濒危特有物种阿氏欧白鱼是分布最广的物种，而几种非本地物种则局限于单个地点。群落组成模式主要与pH值和河流等级有关。然而，物种丰富度、皮洛均匀度和香农-威纳多样性指数等群落指标并不显著。巴克尔恰伊河流域内日益加剧的人类活动表明，应管理污染源和其他有害压力源，如非本地物种，以保护河流生物多样性并维持生态系统服务的提供。因此，我们的研究结果不仅为未来鱼类生物多样性和群落组成研究提供了基线，也为该地区未来的监测研究提供了可能的开端。我们的研究结果强调了长期生物监测研究对于保护土耳其淡水生态系统以监测随时间发生的变化的重要性。
