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- W2078402959 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 203:123-132 (2000) - doi:10.3354/meps203123 differential susceptibility to hypoxia aids estuarine invasion James E. Byers* Department of Ecology, Evolution, and Marine Biology, University of California, Santa Barbara, California 93106, USA *Present address: Friday Harbor Marine Laboratories, University of Washington, 620 University Road, Friday Harbor, Washington 98250, USA. E-mail: jbyers@u.washington.edu ABSTRACT: I examined the resistance of 2 competing estuarine mudsnails, Cerithidea californica (native) and Batillaria attramentaria (exotic), to mortality from microbes and associated alteration of the abiotic environment (i.e., hypoxia). B. attramentaria is displacing C. californica from salt marshes of northern California where the 2 species overlap. I first examined the mortality and distribution of the snails during 2 natural experiments in Bolinas salt marsh (Marin Co., California, USA) that exposed the snails to high bacteria levels and low oxygen conditions for prolonged periods (>3 wk). Second, I conducted 2 laboratory experiments designed to quantify the rates and mechanisms of snail mortality related to bacterial activity. In both the field and the lab, B. attramentaria was significantly more resistant to death by low oxygen. Lab experiments demonstrated that indirect effects of bacteria, i.e., low oxygen levels (as opposed to direct infection by bacteria), were responsible for the high mortality rate of C. californica. In the field, C. californica seemed able to mitigate effects of hypoxia by migrating away from sources of high stress, but only when the harmful bacterial activity was highly localized. Ultimately this study illustrates that stress from microbial action differentially affects the 2 competing species and thus contributes to the invader¹s documented displacement of the native in marshes where they co-occur. Given the growing incidence of eutrophication and associated anoxic conditions in near-shore aquatic environments worldwide, differential susceptibility to hypoxia/anoxia may increasingly contribute to the outcomes of biological invasions in these habitats. KEY WORDS: Dissolved oxygen depletion · Non-indigenous species · Introduced species · Exotic species · Anoxia · Batillaria attramentaria · Cerithidea californica · Hydrogen sulfide · Salt marshes Full text in pdf format PreviousNextExport citation RSS - Facebook - Tweet - linkedIn Cited by Published in MEPS Vol. 203. Online publication date: September 18, 2000 Print ISSN: 0171-8630; Online ISSN: 1616-1599 Copyright © 2000 Inter-Research." @default.
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- W2078402959 title "Differential susceptibility to hypoxia aids estuarine invasion" @default.
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