Filters: Tags: imperiled species (X) > partyWithName: Nathan A Johnson (X)

Filters Date Range Past year (0) Past month (0) Past week (0) Past day (0) Custom range... To   Search Contacts Matthew J Cannister Wetland and Aquatic Research Center Ecosystems James D Williams U.S. Geological Survey More... Categories Data (2) Tag Types Theme (2) Place (1) USGS Scientific Topic Keyword (1) Harvest Set (2) Tag Schemes None (2) Geographic Names Information System (GNIS) (1) USGS Thesaurus (1) ISO 19115 Topic Category (1) View Results as: JSON ATOM CSV

Cumulative spring discharge and survey effort influence threatened Suwannee moccasinshell, Medionidus walkeri, occupancy and detection Freshwater mussels (Unionidae) are among the most imperiled groups of organisms in the world. Unionids are plagued with a lack of basic information regarding species distributions, life history characteristics, and ecological and biological requirements. We assessed the influence of hydrologic factors on the occurrence of the Suwannee Moccasinshell, Medionidus walkeri, a federally threatened freshwater mussel species endemic to the Suwannee River basin in Georgia and Florida. We also assessed the influence of survey effort on detection of M. walkeri during field surveys. All current (2013-2016) mussel survey records in the Suwannee River Basin were compiled, and cumulative discharge contributed by upstream springs... Categories: Data; Tags: Conservation, Distribution, Hydrology, Ichetucknee River, Imperiled species, All tags... Little River, Mill Creek, Modeling, Monitoring, Santa Fe River, Suwannee River, Tidal influence, USGS Science Data Catalog (SDC), Unionidae, Unmarked, Withlacoochee River, Fewer tags Molecular and morphological data on two species complexes in the freshwater mussel genus Cyclonaias We examined species boundaries within an imperiled group of freshwater mussels in the genus Cyclonaias (Bivalvia: Unionidae) using morphometrics, molecular phylogenetics, and multispecies coalescent models to help guide pending conservation assessments and legislative decisions. Congruence across all lines of evidence indicated that current taxonomy overestimates diversity in the C. pustulosa species complex, while underestimating diversity in the C. nodulata species complex. Here we provide all molecular, morphological, and collection information collected and analyzed in our investigation. Categories: Data; Tags: Aquatic Biology, Ecology, Genetics, USGS Science Data Catalog (SDC), biota, All tags... conservation genetics, cryptic species, generic reclassification, imperiled species, incomplete lineage sorting, integrative taxonomy, phylogenetic systematics, species delimitation, species diversity, systematics and taxonomy, Fewer tags