Effects of hydrological regime on the drift algae in a regulated Mediterranean river (River Verdon, southeastern France)
Effects of hydrological regime on the drift algae in a regulated Mediterranean river (River Verdon, southeastern France)
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DOI：
10.1002/rrr.654.abs
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发表时间：
2001-07-01
期刊：
影响因子：
--
通讯作者：
Cazaubon, A
中科院分区：
文献类型：
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作者：
Bertrand, C;Siauve, V;Cazaubon, A
Verdon河的下游受到水力蓄水和供水公司运河开发的大量调节。本研究试图确定平均日流量对该河流中悬浮藻类的影响。取样区位于最后一个水电站大坝的下游。分析了该水文系统的两种水文情势：河流表现为稳定的低余流量，运河表现为较强的年变流量，运河中藻类群落的物种丰富度、细胞密度和多样性均低于河流。漂流藻的丰度随水流的增加而显著降低。藻类群落的组成也随着水流的变化而变化。漂流藻对水文情势的响应表现出强烈的季节变化，水文扰动与淡水需求密切相关。版权所有（C）2001约翰威利父子有限公司
The lower part of the River Verdon is profusely regulated by hydroelectric impoundments and the exploitation of canals by the water supply company. This study is an attempt at determining the effects of mean daily flow on the suspended algae in this river. The sampling sectors were localized downstream to the last hydroelectric dam. Two patterns of hydrological regime were analyzed in this hydrosystem: the river manifests a stable and low residual flow and the canal is characterized by a stronger and annually variable flow.In the canal, the algal community has a lower species richness, cell density and diversity than in the river. The abundance of drift algae decreases significantly with the flow. The composition of the algal community also varies in accordance with the flow. The response of drift algae to hydrological regime shows strong seasonal variations; the hydrological disturbance was heavily linked to the freshwater needs. Copyright (C) 2001 John Wiley & Sons, Ltd.