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• W2067147270 abstract "MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsTheme Sections MEPS 467:137-146 (2012) - DOI: https://doi.org/10.3354/meps09935 Exotic macroalga Gracilaria vermiculophylla provides superior nursery habitat for native blue crab in Chesapeake Bay Cora Ann Johnston1,3, Romuald N. Lipcius2,* 1School of Natural Science, Hampshire College, Amherst, Massachusetts 01002, USA 2Virginia Institute of Marine Science, College of William & Mary, PO Box 1346, Gloucester Point, Virginia 23062, USA 3Present address: Department of Entomology, University of Maryland, College Park, Maryland 20742, USA *Email: rom@vims.edu ABSTRACT: Exotic species often reduce the abundance or diversity of species in marine ecosystems, but some exotics may benefit native species, such as when habitat is enhanced. In Chesapeake Bay, the exotic macroalga Gracilaria vermiculophylla (Rhodophyta) has flourished and dispersed widely, yet the consequences for native species diversity and abundance are not well known. We experimentally examined the capacity of the structurally complex G. vermiculophylla to provide nursery habitat for the blue crab Callinectes sapidus in Chesapeake Bay, where native eelgrass nursery habitat has dwindled. We also examined ontogenetic shifts in survival across alternative nursery habitats. In field surveys, juvenile density was similar in macroalgae and eelgrass, but lower in unvegetated mud habitat. In field experiments, juvenile survival was positively related to crab size in mud but negatively in eelgrass, confirming the paradigm of a predation-induced ontogenetic shift from seagrass to unvegetated habitat. In contrast, irrespective of crab size, survival was higher in macroalgae than in either native habitat. Thus, exotic habitat-forming macroalgae can compensate for severe declines in seagrass nurseries, and facilitate the emergence of a novel ecosystem. KEY WORDS: Exotic species · Ontogenetic habitat shift · Predation · Prey size refuge · Novel ecosystem · Emerging ecosystem · Macroalgae · Seagrass Full text in pdf format PreviousNextCite this article as: Johnston CA, Lipcius RN (2012) Exotic macroalga Gracilaria vermiculophylla provides superior nursery habitat for native blue crab in Chesapeake Bay. Mar Ecol Prog Ser 467:137-146. https://doi.org/10.3354/meps09935 Export citation RSS - Facebook - Tweet - linkedIn Cited by Published in MEPS Vol. 467. Online publication date: October 25, 2012 Print ISSN: 0171-8630; Online ISSN: 1616-1599 Copyright © 2012 Inter-Research." @default.
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• W2067147270 title "Exotic macroalga Gracilaria vermiculophylla provides superior nursery habitat for native blue crab in Chesapeake Bay" @default.
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• W2067147270 doi "https://doi.org/10.3354/meps09935" @default.
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