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Using United States Geological Survey stream gages to predict flow and temperature conditions to maintain freshwater mussel habitat
Author(s) -
Cole Jeffrey C.,
Townsend Philip A.,
Eshleman Keith N.,
St. John White Barbara,
Galbraith Heather S.,
Lellis William A.
Publication year - 2018
Publication title -
river research and applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.679
H-Index - 94
eISSN - 1535-1467
pISSN - 1535-1459
DOI - 10.1002/rra.3326
Subject(s) - habitat , environmental science , endangered species , hydrology (agriculture) , flow conditions , mussel , ecology , flow (mathematics) , geology , biology , geometry , geotechnical engineering , mathematics
Habitat conditions necessary to support freshwater mussels can be difficult to characterize and predict, particularly for rare or endangered species such as the federally endangered dwarf wedgemussel, Alasmidonta heterodon . In this study, we evaluate flow and temperature conditions in three areas of the mainstem Delaware River known to consistently support A . heterodon , and we develop predictive models using the U.S. Geological Survey (USGS) stream gages and thermal stations in order to identify conditions under which habitat alteration could threaten the species. Flow and temperature prediction models based on nearby existing USGS gage and thermal stations were predictive for all three sites. Both discharge prediction and water depth profile models indicate one location (Site 3) was the most vulnerable to low‐flow conditions as it requires the highest discharge rate (26.3 cms) at the USGS Callicoon gage to maintain both the full wetted perimeter (P full ) and minimal wetted perimeter (P min ) and prevent occlusion of areas that contain A . heterodon . Flow management targets aimed at protecting Site 3 should also protect Sites 1 and 2. Although analyses indicated significant benthic habitat available in all three sites even under low discharge rates, specific mussel locations could be vulnerable to dewatering and thermal stress if only P min values were maintained. Results indicate the magnitude of site temperature deviations from thermal stations varied by site and river temperature. In general, our results suggest that existing temperature and stream gage infrastructure may be used predictively to evaluate the effects of different flow targets on mainstem Delaware River A . heterodon habitat.