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Daniel J Wieferich

Physical Scientist

Science Analytics and Synthesis

Office Phone: 303-202-4603
Fax: 303-202-4710
ORCID: 0000-0003-1554-7992

Box 25046
Denver Federal Center
Denver , CO 80225-0046

Supervisor: Kevin J Gergely
Table showing human and natural landscape factors used for the 2015 national assessment of stream fish habitat.
Tags: 2015, Hawaii, Table
The Northeastern States contain over 17,000 dams with most built before 1910 for agricultural and industrial water power uses. A few have been built more recently for flood control, recreation, water supply, and energy generation. In many cases, the dams have outlived their expected life expectancy and use, but continue to block the passage of migratory fish species, such as American Shad, river herring, American Eel, Rainbow Smelt, and Atlantic Salmon, to and from their historic upstream spawning grounds. Additionally, the fragmentation of stream systems by dams have reduced Brook Trout populations in some locations. Progress is being made on this impairment as over 67 dams were removed during 2010 to 2014 in...
Relative condition of fish habitat in streams of the Eastern Gulf of Mexico States. Histogram shows percentage of total stream length in each condition class.
Map of the risk of current fish habitat degradation of Northern Gulf of Mexico estuaries.
This item provides the ScienceBase query that identifies components of the fish habitat assessments within the Southern Plains States. It also contains a link to a configuration file that pulls these pieces of information into a logical order. This information can be accessed through the ScienceBase API to display a summary of fish habitat assessment information for the Southern Plains States.
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