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{
"USGS Publications Warehouse": { "@context": "https://schema.org", "@type": "Article", "additionalType": "Journal Article", "name": "Effects of predation by sea ducks on clam abundance in soft-bottom intertidal habitats", "identifier": [ { "@type": "PropertyValue", "propertyID": "USGS Publications Warehouse IndexID", "value": "70175278", "url": "https://pubs.usgs.gov/publication/70175278" }, { "@type": "PropertyValue", "propertyID": "USGS Publications Warehouse Internal ID", "value": 70175278 }, { "@type": "PropertyValue", "propertyID": "DOI", "value": "10.3354/meps329131", "url": "https://doi.org/10.3354/meps329131" } ], "journal": { "@type": "Periodical", "name": "Marine Ecology Progress Series", "volumeNumber": "329", "issueNumber": null }, "inLanguage": "en", "isPartOf": [ { "@type": "CreativeWorkSeries", "name": "Marine Ecology Progress Series" } ], "datePublished": "2007", "dateModified": "2016-08-03", "abstract": "Recent studies have documented strong, top-down predation effects of sea ducks on mussel populations in rocky intertidal communities. However, the impact of these gregarious predators in soft-bottom communities has been largely unexplored. We evaluated effects of predation by wintering surf scoters\u00a0Melanitta perspicillata\u00a0and white-winged scoters\u00a0M. fusca\u00a0on clam populations in soft-bottom intertidal habitats of the Strait of Georgia, British Columbia. Specifically, we documented spatial and temporal variation in clam density (clams m\u20132), scoter diet composition, and the consequences of scoter predation on clam abundance. Of the 3 most numerous clams, Manila clams\u00a0Venerupis philippinarum\u00a0and varnish clams\u00a0Nuttallia obscurata\u00a0were the primary prey items of both scoter species, while clams of the genus\u00a0Macoma\u00a0were rarely consumed by scoters. Between scoter arrival in the fall and departure in the spring, Manila clams decreased in density at most sample sites, while varnish clam densities did not change or declined slightly. Our estimates of numbers of clams consumed by scoters accounted for most of the observed declines in combined abundance of Manila and varnish clams, despite the presence of numerous other vertebrate and invertebrate species known to consume clams. For\u00a0Macoma\u00a0spp., we detected an over-winter increase in density, presumably due to growth of clams too small to be retained by our sieve (<5 mm) during fall sampling, in addition to the lack of predation pressure by scoters. These results illustrate the strong predation potential of scoters in soft-bottom intertidal habitats, as well as their potentially important role in shaping community structure.", "description": "14 p.", "publisher": { "@type": "Organization", "name": "Inter-Research" }, "author": [ { "@type": "Person", "name": "Lewis, Tyler tlewis@usgs.gov", "givenName": "Tyler", "familyName": "Lewis", "email": "tlewis@usgs.gov", "identifier": { "@type": "PropertyValue", "propertyID": "ORCID", "value": "0000-0002-4998-3031", "url": "https://orcid.org/0000-0002-4998-3031" }, "affiliation": [ { "@type": "Organization", "name": "Alaska Science Center Biology MFEB", "url": "https://www.usgs.gov/centers/alaska-science-center" }, { "@type": "Organization", "name": "Alaska Science Center Biology WTEB", "url": "https://www.usgs.gov/centers/alaska-science-center" } ] }, { "@type": "Person", "name": "Esler, Daniel desler@usgs.gov", "givenName": "Daniel", "familyName": "Esler", "email": "desler@usgs.gov", "identifier": { "@type": "PropertyValue", "propertyID": "ORCID", "value": "0000-0001-5501-4555", "url": "https://orcid.org/0000-0001-5501-4555" }, "affiliation": [ { "@type": "Organization", "name": "Alaska Science Center Biology MFEB", "url": "https://www.usgs.gov/centers/alaska-science-center" }, { "@type": "Organization", "name": "Alaska Science Center", "url": "https://www.usgs.gov/centers/alaska-science-center" }, { "@type": "Organization", "name": "Simon Fraser University, Centre for Wildlife Ecology" } ] }, { "@type": "Person", "name": "Boyd, W. Sean", "givenName": "W. Sean", "familyName": "Boyd" } ], "funder": [ { "@type": "Organization", "name": "Alaska Science Center", "url": "https://www.usgs.gov/centers/alaska-science-center" } ], "spatialCoverage": [ { "@type": "Place", "additionalType": "country", "name": "Canada", "url": "https://geonames.org/4269037" }, { "@type": "Place", "additionalType": "state", "name": "British Columbia" }, { "@type": "Place", "geo": [ { "@type": "GeoShape", "additionalProperty": { "@type": "PropertyValue", "name": "GeoJSON", "value": { "type": "FeatureCollection", "features": [ { "type": "Feature", "properties": {}, "geometry": { "type": "Polygon", "coordinates": [ [ [ -124.99557495117186, 49.677403884483425 ], [ -124.7991943359375, 49.674737880665994 ], [ -124.62890625, 49.51005182543569 ], [ -124.70306396484376, 49.45294986406723 ], [ -124.74700927734374, 49.429733169930664 ], [ -124.81979370117188, 49.38863055043897 ], [ -125.12741088867188, 49.62049743433884 ], [ -124.99557495117186, 49.677403884483425 ] ] ] } } ] 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