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Abstract Dams have been a fundamental part of the U.S. national agenda over the past two hundred years. Recently, however, dam removal has emerged as a strategy for addressing aging, obsolete infrastructure and more than 1,100 dams have been removed since the 1970s. However, only 130 of these removals had any ecological or geomorphic assessments, and fewer than half of those included before- and after-removal (BAR) studies. In addition, this growing, but limited collection of dam-removal studies is limited to distinct landscape settings. We conducted a meta-analysis to compare the landscape context of existing and removed dams and assessed the biophysical responses to dam removal for 63 BAR studies. The highest...
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Abstract Dam removal is widely used as an approach for river restoration in the United States. The increase in dam removals--particularly large dams--and associated dam-removal studies over the last few decades motivated a working group at the USGS John Wesley Powell Center for Analysis and Synthesis to review and synthesize available studies of dam removals and their findings. Based on dam removals thus far, some general conclusions have emerged: (1) physical responses are typically fast, with the rate of sediment erosion largely dependent on sediment characteristics and dam-removal strategy; (2) ecological responses to dam removal differ among the affected upstream, downstream, and reservoir reaches; (3) dam removal...
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Whitefish strontium otolith readings from Benjamin et al. (2014) "Spatio-temporal variability in movemnt, age, and growth, of mountain whitefish (Prosopium williamsoni) in a river network based upon PIT tagging and otolith chemistry." Canadian Journal of Fisheries and Aquatic Sciences, 2014, 71(1): 131-140, 10.1139/cjfas-2013-0279
Categories: Data;
Tags: Data Visualization & Tools,
Fish,
Methow River,
Northwest CASC,
Rivers, Streams and Lakes, All tags...
Science Tools For Managers,
Water, Coasts and Ice,
Wildlife and Plants,
mountain whitefish,
otolith,
strontium, Fewer tags
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For the past six years, the Bureau of Reclamation (BOR) has funded the USGS to study fish responses to restoration efforts and to construct a model relating stream habitat with fish population dynamics in the Methow River Basin, a tributary of the Columbia River. In the proposed study, we will use fish growth, distribution and movement (USGS data), foodweb data (Idaho State University), river flow (BOR data that we will expand) and water temperature data (from numerous agencies) to develop spatially-explicit bioenergetics models to assess effects of climate change on the viability of resident salmonid populations based on models being developed by USGS. The bioenergetics models will integrate such things as climate-change...
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This data contains information of PIT tagged mountain whitefish detections at PIT tag interrogators in the Methow, Columbia and Entiait, rivers. This data was downloaded from the PTAGIS database at www.ptagis.org.
Categories: Data;
Tags: Columbia River,
Data Visualization & Tools,
Entiat River,
Fish,
Methow River, All tags...
Northwest CASC,
PIT tags,
Rivers, Streams and Lakes,
Science Tools For Managers,
Water, Coasts and Ice,
Wildlife and Plants,
interrogations,
mountain whitefish,
prosopium williamsoni, Fewer tags
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