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Understanding water column and streambed thermal refugia for endangered mussels in the Delaware River

Environmental Science and Technology

By:
, , , , and
DOI: 10.1021/es4018893

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Abstract

Groundwater discharge locations along the upper Delaware River, both discrete bank seeps and diffuse streambed upwelling, may create thermal niche environments that benefit the endangered dwarf wedgemussel (Alasmidonta heterodon). We seek to identify whether discrete or diffuse groundwater inflow is the dominant control on refugia. Numerous springs and seeps were identified at all locations where dwarf wedgemussels still can be found. Infrared imagery and custom high spatial resolution fiber-optic distributed temperature sensors reveal complex thermal dynamics at one of the seeps with a relatively stable, cold groundwater plume extending along the streambed/water-column interface during mid-summer. This plume, primarily fed by a discrete bank seep, was shown through analytical and numerical heat-transport modeling to dominate temperature dynamics in the region of potential habitation by the adult dwarf wedgemussel.

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Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Understanding water column and streambed thermal refugia for endangered mussels in the Delaware River
Series title:
Environmental Science and Technology
DOI:
10.1021/es4018893
Volume
47
Issue:
20
Year Published:
2013
Language:
English
Publisher:
American Chemical Society
Contributing office(s):
OGW Branch of Geophysics
Description:
9 p.
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Environmental Science and Technology
First page:
11423
Last page:
11431
Country:
United States
State:
Pennsylvania
Other Geospatial:
Delaware River