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Filters: Tags: Baltimore Canyon (X) > partyWithName: Jill R Bourque (X)

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Terrain variables extracted from bathymetry were used in combination with stable isotope datasets to construct geospatially-explicit isoscapes that predicted variation in carbon and nitrogen isotopes across the canyon-slope seascape, providing insights into the distribution and flow of energy resources, relevant to understanding whole community function.
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Chemosynthetic environments support distinct benthic communities capable of utilizing reduced chemical compounds for nutrition. Hundreds of methane seeps have been documented along the U.S. Atlantic margin (USAM), and detailed investigations at a few seeps have revealed distinct environments containing mussels, microbial mats, authigenic carbonates, and soft sediments. The dominant mussel Bathymodiolus childressi contains methanotrophic endosymbionts but is also capable of filter feeding. We used SIA (δ13C, δ 5N, and δ34S) and an isotope mixing model (MixSIAR) to estimate resource contribution to B. childressi and characterize food webs at two seep sites (Baltimore Seep: 400 m and Norfolk Seep: 1500 m depths) along...
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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...
    map background search result map search result map Benthic infaunal communities of Baltimore and Norfolk canyons Stable isotopic insights into Bathymodiolus childressi at two seeps in the U.S. Atlantic margin Stable isotope data and terrain variables for isoscape modeling around two submarine canyons in the western Atlantic sampled in 2012-2013 Stable isotopic insights into Bathymodiolus childressi at two seeps in the U.S. Atlantic margin Benthic infaunal communities of Baltimore and Norfolk canyons Stable isotope data and terrain variables for isoscape modeling around two submarine canyons in the western Atlantic sampled in 2012-2013