The impact of small impoundments and connectivity loss on fishdistribution and abundance in river ecosystems: leveraging cutting edge geospatial model

小蓄水池和连通性丧失对河流生态系统鱼类分布和丰度的影响：利用尖端地理空间模型

• 批准号: 2746458
• 金额: --
• 依托单位: University of Nottingham
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2022
• 资助国家: 英国
• 起止时间: 2022 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2746458
• 关键词: impact; small; impoundments; connectivity; loss

Rivers are among the world's most threatened ecosystems. Freshwater fisheriesare at risk from multiple stressors including climate change, pollutants and the presence of dams which inhibit fish movement and migration. Globally, only 37% of the world's rivers remain free of dams, butin the UK only 1% of watercourses unimpeded by barriersduelargely tothe UK's industrial heritage.Althoughresearch has demonstrated clear links between large dams and declines in fish populations, there is aclearlack of knowledge on how smaller (but more frequent)historical barriers typical of UK rivers influence fish populations. In thecontextofincreasing need to balance conservation of freshwater ecosystems against the demandforrenewable energy from legacy micro-hydroelectric facilitiesand similar structures, research isthereforeurgently needed to understand how cumulative small historicalbarriers influence fish population dynamics.This study will use eDNA (trace DNA shed from fish, collected via water samples) to quantify the abundance and distribution of fish communities within the Derbyshire Derwent, a catchment with a rich history of historical impoundment. By coupling population-level datawith river connectivity models relating to the presence of historical barriers and key fish habitats, thisprojectwill generate new fundamental understanding of the impacts of small, frequent impoundments on river habitat connectivity and fish population dynamicsand thus provide important information for managing rivers affected by the legacy of industrial development.

河流是世界上最受威胁的生态系统之一。多种压力源的淡水渔业病，包括气候变化，污染物以及抑制鱼类运动和迁移的大坝的存在。在全球范围内，世界上只有37％的河流没有大坝，但英国只有1％的河流不受野蛮的河流的挫折。英国河流典型的历史障碍会影响鱼类种群多么小（但更频繁）。在这种情况下，需要平衡淡水生态系统的保护与遗产微型杂种设施和类似结构的可需求的能量，研究中需要进行研究，以了解累积的小型历史携带者如何影响埃德纳（Trace DNA）（trace dna culted fir eDNA）水样），以量化德比郡德文特（Derbyshire Derwent）中鱼类群落的丰度和分布，这是一个具有丰富历史蓄水史的集水区。通过将与历史障碍和关键鱼类栖息地的存在有关的人口级数据瓦斯河连接模型耦合，ThisProject将产生对小型，频繁的蓄水者对河流栖息地连通性和鱼类种群的影响的新基本理解，从而为受影响的河流提供了重要信息根据工业发展的遗产。