Effects of hydromorphological integrity on biodiversity and functioning of river ecosystems
Effects of hydromorphological integrity on biodiversity and functioning of river ecosystems
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DOI：
10.1007/s10750-009-0083-4
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发表时间：
2010-12-01
期刊：
影响因子：
2.6
通讯作者：
Mutz, Michael
中科院分区：
文献类型：
--
作者：
Elosegi, Arturo;Diez, Joserra;Mutz, Michael
在水沙动力的驱动下，河道趋于动态平衡。由此产生的波动模式的渠道形式的影响，坡度，基质的可蚀性，以及在河流走廊和集水区的植被。地貌是河流生物多样性和生态系统功能的基础，因为河道格局为生物群提供了栖息地，为生态系统过程提供了物理框架。人类活动日益改变全球范围内河道形态的自然驱动因素（例如，城市化增加了水文极端情况，为农业砍伐森林增加了沉积物产量）。此外，世界河流沿着普遍存在的人类活动直接影响着河道动力学，如河流整治使河道形态简化和简化。河流的保护和恢复必须包括河道形成的机制和河道形态和动力学的生态后果。本文（1）总结了河道形态对河流生态系统生物多样性和功能的作用，（2）描述了空间复杂性，连通性和动态性作为三个关键的水文形态属性，（3）确定了影响这些关键组成部分的普遍人类活动，（4）分析了现有知识的差距，并确定了未来的研究主题。
River channels tend to a dynamic equilibrium driven by the dynamics of water and sediment discharge. The resulting fluctuating pattern of channel form is affected by the slope, the substrate erodibility, and the vegetation in the river corridor and in the catchment. Geomorphology is basic to river biodiversity and ecosystem functioning since the channel pattern provides habitat for the biota and physical framework for ecosystem processes. Human activities increasingly change the natural drivers of channel morphology on a global scale (e.g. urbanization increases hydrological extremes, and clearing of forests for agriculture increases sediment yield). In addition, human actions common along world rivers impact channel dynamics directly, e.g. river regulation simplifies and fossilizes channel form. River conservation and restoration must incorporate mechanisms of channel formation and ecological consequences of channel form and dynamics. This article (1) summarizes the role of channel form on biodiversity and functioning of river ecosystems, (2) describes spatial complexity, connectivity and dynamism as three key hydromorphological attributes, (3) identifies prevalent human activities that impact these key components and (4) analyzes gaps in current knowledge and identifies future research topics.