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Filters Date Range Past year (0) Past month (0) Past week (0) Past day (0) Custom range... To   Search Contacts Amanda W Demopoulos U.S. Geological Survey Jennifer P McClain Counts Jill R Bourque U.S. Geological Survey - ScienceBase Wetland and Aquatic Research Center Craig M. Robertson Categories Data (2) Tag Types Theme (2) Harvest Set (2) Place (2) Tag Schemes None (1) none (1) Geographic Names Information System (GNIS) (2) USGS Biocomplexity Thesaurus (1) ISO 19115 Topic Category (1) View Results as: JSON ATOM CSV

Food-web dynamics and isotopic niches in deep-sea communities residing in a submarine canyon and on the adjacent open slopes Examination of food webs and trophic niches provide insight into organisms’ functional ecology, yet few studies have examined the trophodynamics within submarine canyons, where the interaction of morphology and oceanography influences food deposition. Stable isotope analysis and Bayesian ellipses documented deep-sea food web structure and trophic niches in Baltimore Canyon and the adjacent open slopes in the U.S. Mid-Atlantic Region. Results revealed isotopically diverse feeding groups, comprising approximately 5 trophic levels. Regression analysis indicated that consumer isotope data are structured by site (canyon vs. slope), feeding group, and depth. Benthic feeders were enriched in 13C and 15N relative to suspension... Categories: Data; Types: Citation; Tags: Atlantic Ocean, Baltimore Canyon, Bayesian ellipses, USGS Science Data Catalog (SDC), deep-sea, All tags... stable isotopes, submarine canyon, Fewer tags Benthic infaunal communities of Baltimore and Norfolk canyons Submarine canyons are morphologically complex systems, acting as major conduits of organic matter along continental shelves, promoting gradients in food resources, habitat heterogeneity, and areas of sediment resuspension and deposition. Often environmental conditions within canyons can be highly distinct, particularly in different parts of the canyon and in contrast to adjacent slopes. Here we examine how biogeochemical drivers shape the differences between canyon and slope infaunal communities in Baltimore and Norfolk Canyons in the U.S. Mid-Atlantic Region. Specific comparisons included macrofaunal communities in Norfolk canyons and adjacent slope, hard substrate associated macrofaunal communities in Norfolk... Categories: Data; Types: Citation; Tags: Atlantic Ocean, Baltimore Canyon, Benthos, Meiobenthos, Norfolk Canyon, All tags... USGS Science Data Catalog (SDC), biota, chemosynthetic, deep-sea, macrofauna, meiofauna, seep, submarine canyon, Fewer tags