Habitat effects on stream productive capacity, energy flow, and adaptive tradeoffs among juvenile salmonids

栖息地对河流生产力、能量流和幼鲑鱼适应性权衡的影响

• 批准号: RGPIN-2016-04250
• 负责人: Rosenfeld, Jordan
• 金额: $ 2.04万
• 依托单位: University of British Columbia
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=631920
• 关键词: Habitat; effects; stream; productive; capacity

The ability of fish to successfully exploit stream habitats depends on physical habitat structure, prey production, and the abundance of predators and competitors. These features form the adaptive landscape for drift-feeding fish like salmon and trout, while simultaneously constraining energy transfer to the fish trophic level. Along with water chemistry and temperature, physical habitat structure (e.g. channel form, velocity, substrate) remains the most fundamental determinant of stream productive capacity, and understanding physical constraints on fish production is key to predicting the effects of habitat change on fish populations.

鱼类成功利用河流栖息地的能力取决于自然栖息地结构、猎物产量以及捕食者和竞争者的丰富程度。这些特征形成了鲑鱼和鳟鱼等漂流进食鱼类的适应性景观，同时限制了能量向鱼类营养级的转移。与水化学和温度一样，物理栖息地结构（例如河道形式、流速、底质）仍然是河流生产力的最基本决定因素，了解鱼类生产的物理限制是预测栖息地变化对鱼类种群影响的关键。