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Title: Shifting dominance of riparian Populus and Tamarix along gradients of flow alteration in western North American rivers

Author: Merritt, David M.; Poff, N. Leroy;

Date: 2010

Source: Ecological Applications. 20(1): 135-152.

Publication Series: Miscellaneous Publication

Description: Tamarix ramosissima is a naturalized, nonnative plant species which has become widespread along riparian corridors throughout the western United States. We test the hypothesis that the distribution and success of Tamarix result from human modification of river-flow regimes. We conducted a natural experiment in eight ecoregions in arid and semiarid portions of the western United States, measuring Tamarix and native Populus recruitment and abundance at 64 sites along 13 perennial rivers spanning a range of altered flow regimes. We quantified biologically relevant attributes of flow alteration as an integrated measure (the index of flow modification, IFM), which was then used to explain between-site variation in abundance and recruitment of native and nonnative riparian plant species.

Keywords: dams, flow management, flow regime, index of flow modification, invasive species, Populus, river management, river restoration, tamarisk, Tamarix ramosissima, vegetation change, water development

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Citation:


Merritt, David M.; Poff, N. Leroy. 2010. Shifting dominance of riparian Populus and Tamarix along gradients of flow alteration in western North American rivers. Ecological Applications. 20(1): 135-152.

 


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