Critical landscape attributes that influence fish population dynamics in headwater streams
Critical landscape attributes that influence fish population dynamics in headwater streams
复制标题
影响源头河流鱼类种群动态的关键景观属性
作者：
I. Schlosser
三个景观属性可能对决定上游河流鱼类种群动态的速率依赖过程产生强烈影响：（1）陆水交错带的功能相互作用及其对资源供应和捕食者-被捕食者相互作用的时空变化的影响;（2）大尺度空间生境关系及其对资源利用和鱼类运动的影响;以及（3）恶劣环境条件下避难所的存在及其对鱼类存活和迁出/迁入率的影响。阐明这些因素如何在一系列的时间和空间尺度上相互作用，应该是一个主要目标的海洋鱼类生态学家。
Three landscape attributes are likely to have strong effects on the rate-dependent processes determining fish population dynamics in headwater streams: (1) functional interactions at terrestrial-aquatic ecotones and their influence on temporal and spatial variation in resource supply and predator-prey interactions, (2) large-scale spatial habitat relationships and their effect on resource use and fish movement, and (3) presence of refugia from harsh environmental conditions and their influence on fish survival and emigration/immigration rates. Elucidating how these factors interact over a range of temporal and spatial scales should be a major goal of lotic fish ecologists.