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首页> 外文期刊>Earth Surface Processes and Landforms: The journal of the British Geomorphological Research Group >Considering river structure and stability in the light of evolution: feedbacks between riparian vegetation and hydrogeomorphology
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Considering river structure and stability in the light of evolution: feedbacks between riparian vegetation and hydrogeomorphology

机译：从进化的角度考虑河流的结构和稳定性：河岸植被与水文地貌之间的反馈

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摘要

River ecological functioning can be conceptualized according to a four-dimensional framework, based on the responses of aquatic and riparian communities to hydrogeomorphic constraints along the longitudinal, transverse, vertical and temporal dimensions of rivers. Contemporary riparian vegetation responds to river dynamics at ecological timescales, but riparian vegetation, in one form or another, has existed on Earth since at least the Middle Ordovician (c. 450Ma) and has been a significant controlling factor on river geomorphology since the Late Silurian (c. 420Ma). On such evolutionary timescales, plant adaptations to the fluvial environment and the subsequent effects of these adaptations on fluvial sediment and landform dynamics resulted in the emergence, from the Silurian to the Carboniferous, of a variety of contrasted fluvial biogeomorphic types where water flow, morphodynamics and vegetation interacted to different degrees. Here we identify several of these types and describe the consequences for biogeomorphic structure and stability (i.e. resistance and resilience), along the four river dimensions, of feedbacks between riparian plants and hydrogeomorphic processes on contrasting ecological and evolutionary timescales. Copyright (c) 2014 John Wiley & Sons, Ltd.
机译：河流生态功能可以根据水生和河岸社区对河流纵向，横向，垂直和时间维度上水文地貌约束的响应，根据四个维度的框架进行概念化。当代河岸植被在生态学尺度上对河流动态作出响应，但至少从中奥陶纪（约450Ma）以来，河岸植被以一种或另一种形式存在于地球上，自志留纪晚期以来一直是河道地貌的重要控制因素（约420Ma）。在这样的演化时间尺度上，植物对河流环境的适应以及这些适应对河流沉积物和地貌动力学的后续影响导致从志留纪到石炭纪出现了多种对比的河流生物地貌类型，其中水流，地貌动力学和植被之间有不同程度的相互作用。在这里，我们确定了其中几种类型，并描述了沿河的四个维度对河岸植物和水生地貌过程之间的生态和演化时间尺度之间的反馈的生物地貌结构和稳定性（即抗性和复原力）的后果。版权所有（c）2014 John Wiley＆Sons，Ltd.

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