Marine and Inland Waters Sciences and Technology Department, Faculty of Fisheries, Ege University, İzmir, Turkey.
Department of Life and Environmental Sciences, Faculty of Science and Technology, Bournemouth University, Poole, Dorset, UK.
Environ Monit Assess. 2024 Nov 1;196(11):1145. doi: 10.1007/s10661-024-13300-y.
The long-term monitoring of freshwater ecosystems has been globally recognized for its critical role in preserving natural biodiversity and human well-being over the past century, yet monitoring efforts remain heterogeneously distributed. The Anatolia region in Turkey is known to host three out of the world's 34 biodiversity hotspots, boasting high biodiversity, but is increasingly threatened by anthropogenic effects and invasive freshwater fish species. Although the introduction of non-native fish species and pollution has detrimental effects on different river catchments in this area, long-term biomonitoring studies in Anatolia remain scarce and inconsistent. Collecting information of the Gediz River basin, a major Anatolian river catchment as a model that has been significantly impacted by human activities, published between 1971 and 2023, a total of 21 fish species from 12 families were identified. The spatial and temporal occurrences of these species fluctuated significantly due to heterogeneous sampling efforts that did not follow a clear pattern, indicating a complex ecological and conservation scenario characterized by both spatial and temporal variability in species prevalence, endemism and abundance. The presented results emphasize the need for comprehensive long-term biodiversity monitoring for anthropogenically impacted catchments like the Gediz River basin. Only with a coherent basis of high-resolution monitoring data can the multiple stressors threatening Anatolia's freshwater biodiversity be disentangled and, subsequently, be mitigated. Using the Gediz River basin as an example, this study emphasizes the urgent need for comprehensive, long-term biodiversity monitoring in understudied regions worldwide to protect regional biodiversity and ensure ecosystem health.
在过去的一个世纪中，人们已经认识到对淡水生态系统进行长期监测对于保护自然生物多样性和人类福祉具有重要作用，但监测工作的分布仍然存在差异。土耳其的安纳托利亚地区拥有世界上 34 个生物多样性热点中的 3 个，拥有丰富的生物多样性，但正日益受到人为影响和入侵淡水鱼类的威胁。尽管引入非本地鱼类物种和污染对该地区的不同河流流域造成了不利影响，但安纳托利亚的长期生物监测研究仍然很少且不一致。该研究以受人类活动显著影响的安纳托利亚主要河流流域——格地兹河为例，收集了 1971 年至 2023 年期间发表的信息，共确定了 12 个科的 21 种鱼类。由于采样工作不均匀且没有遵循明确的模式，这些物种的时空出现频率波动很大，表明存在复杂的生态和保护情况，其特征是物种流行率、特有性和丰度在空间和时间上都存在变化。研究结果强调了对像格地兹河流域这样受到人为影响的集水区进行全面长期生物多样性监测的必要性。只有在具有高分辨率监测数据的一致基础上，才能理清威胁安纳托利亚淡水生物多样性的多种胁迫因素，并随后加以缓解。该研究以格地兹河流域为例，强调了在世界范围内对研究不足的地区进行全面、长期生物多样性监测的迫切需要，以保护区域生物多样性并确保生态系统健康。
