National Park Service
Email:
sam_brenkman@nps.gov
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We collected environmental DNA (eDNA) data from the Elwha River, home to the world’s largest dam removal project, to track the spatial and temporal patterns of species responses following dam removal. In total, we collected data for 11 different fish taxa, sampled at 25 sites ranging across 56 river kilometers in a wilderness river for 4 years following dam removal. We show that eDNA can effectively be used to determine whether fish have recolonized past former dams, and in some cases determine the spatial extent of that recolonization.
Categories: Data;
Tags: Aquatic Biology,
Charr,
Dam Removal,
Ecology,
Elwha River, All tags...
Elwha River,
Genetics,
Salmon,
USGS Science Data Catalog (SDC),
biota,
environmental DNA, Fewer tags
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We used snorkel surveys in the Elwha River, conducted in consecutive years before (2007, 2008) and after (2018, 2019) dam removal to assess changes in fish distribution and density. In total, we counted 54,616 Chinook Salmon, Bull Trout, Steelhead, and trout (Rainbow Trout and Coastal Cutthroat Trout combined) in 22 common reaches spanning 65 river kilometers. The occupancy of juvenile Chinook Salmon, Coho Salmon, and trout was also assessed following dam removal.
Categories: Data;
Tags: Aquatic Biology,
Ecology,
Elwha River,
Hydrology,
Land Use Change, All tags...
Olympic Peninsula,
USGS Science Data Catalog (SDC),
USGS-EMA-LOW-SB SMC: Native Species Restoration,
USGS-EMA-LOW-SS Dam Removal,
Washington,
Water Resources,
Wildlife Biology,
biota,
environment,
fish,
fishery resources,
inlandWaters,
migratory species,
natural resource management,
remediation,
salmon,
trout, Fewer tags
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Analytical tools are needed in riverine science and management to bridge the gap between GIS and statistical packages that were not designed for the directional and dendritic structure of streams. We introduce linbin, an R package developed for the analysis of riverscapes at multiple scales. With this software, riverine data on aquatic habitat and species distribution can be scaled and plotted automatically with respect to their position in the stream network or-in the case of temporal data-their position in time. The linbin package aggregates data into bins of different sizes as specified by the user. We provide case studies illustrating the use of the software for (1) exploring patterns at different scales by...
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