River‐wide changes in morphologic character following channelization and impoundment alter the occurrence and distribution of surface water and available habitats for aquatic organisms. Quantifying patterns of creation, redistribution or disappearance of habitats at river‐wide and decadal spatiotemporal scales can promote understanding regarding trajectories of different habitat types following alteration and prospects of direct habitat enhancement projects within altered alluvial rivers. Newly available remote‐sensing tools and databases may improve detection of river‐wide changes in habitat through time. We used a combination of remote‐sensing data and generalized linear models to assess changes in surface water coverage from 1984 to 2015 among aquatic habitats of 496 km of the Arkansas River within Arkansas, USA. Changes through time in surface area of permanent and episodically inundated areas — and thus the availability of aquatic habitat — were variable along the river. Overall, the river lost a total 2.1% of permanent and 12.1% of episodic water surface area. The general trend of loss of off‐main‐channel habitat and increased coverage of permanent water along main‐channel habitats may indicate a long‐term transition (i.e. ramp‐type disturbance) within areas of the Arkansas River where backwaters are transitioning to terrestrial environments, and habitat heterogeneity in the main channel is decreasing. As such, a decadal‐scale change of channel form and backwater habitats may be the dominant pattern with limited regeneration of diverse habitat types. Understanding changes to permanent and episodic water availability may aid predictions regarding ecological effects of channelization and impoundments, including both increases and decreases in riverine productivity, biotic diversity and population abundances through space and time. Water resource managers and biologists can use information regarding river‐wide changes in habitat availability obtained through remote sensing data to direct river management practices, including dredging and side‐channel construction, and to assess ecological responses to such changes.

中文翻译：

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美国阿肯色州通道化和蓄水的阿肯色河内的水生生境变化

河道渠化和蓄水后河床形态特征的变化改变了地表水和水生生物可用生境的发生和分布。量化河流范围和年代际时空尺度上的栖息地的创造，再分布或消失的模式，可以促进人们对冲积河流中直接生境改善项目的改变和前景后，对不同栖息地类型的轨迹的理解。新近可用的遥感工具和数据库可能会随着时间的推移改善对栖息地范围内河流变化的检测。我们结合遥感数据和广义线性模型，评估了1984年至2015年美国阿肯色州496公里阿肯色河水生生境中地表水覆盖率的变化。永久性和流行性泛滥区的表面积随时间的变化（以及由此而来的水生生境的变化）沿河是变化的。总体而言，这条河流总共损失了永久性水面面积的2.1％和永久性水面面积的12.1％。主河道外栖息地丧失的总体趋势以及主河道栖息地沿岸永久性水域覆盖的增加，可能表明阿肯色河地区的死水正在向陆地环境过渡，这是一个长期过渡（即斜坡型扰动） ，并且主要渠道中的栖息地异质性正在降低。因此，河道形态和回水生境的年代际变化可能是主导格局，而不同生境类型的再生有限。了解永久性和偶发性可用水量的变化可能有助于有关渠道化和蓄水的生态影响的预测，包括河流生产力的增加和减少，生物多样性和时空上的人口数量增加。水资源管理者和生物学家可以使用通过遥感数据获得的有关河川范围内栖息地可利用性变化的信息来指导河流管理实践，包括疏side和侧渠建设，并评估对这种变化的生态响应。