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  • 1
    Online Resource
    Online Resource
    Competition and Coexistence. (2002)
    Berlin, Heidelberg :Springer Berlin / Heidelberg,
    Details
    Keywords: Competition (Biology). ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (231 pages)
    Edition: 1st ed.
    ISBN: 9783642561665
    Series Statement: Ecological Studies ; v.161
    URL: https://ebookcentral.proquest.com/lib/geomar/detail.action?docID=3089858
    DDC: 577.83000000000004
    Language: English
    Note: Ecological Studies, Vol. 161 -- Competition and Coexistence -- Copyright -- Preface -- Contents -- Contributors -- 1 Introduction -- 2 Competition in Well-Mixed Habitats: From Competitive Exclusion to Competitive Chaos -- 3 Spatial Models of Competition -- 4 Competition and Coexistence in Plankton Communities -- 5 Competition and Coexistence of Mobile Animals -- 6 Competition, Coexistence and Diversity on Rocky Shores -- 7 Competition and Coexistence in Terrestrial Plants -- 8 Synthesis: Back to Santa Rosalia, or No Wonder There Are So Many Species -- Subject Index.
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    GEOMAR EBL
  • 2
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    Effects of sea surface warming on marine plankton (2014)
    Wiley
    In:  Ecology Letters, 17 (5). pp. 614-623.
    Details
    Publication Date: 2019-09-23
    Description: Ocean warming has been implicated in the observed decline of oceanic phytoplankton biomass. Some studies suggest a physical pathway of warming via stratification and nutrient flux, and others a biological effect on plankton metabolic rates; yet the relative strength and possible interaction of these mechanisms remains unknown. Here, we implement projections from a global circulation model in a mesocosm experiment to examine both mechanisms in a multi-trophic plankton community. Warming treatments had positive direct effects on phytoplankton biomass, but these were overcompensated by the negative effects of decreased nutrient flux. Zooplankton switched from phytoplankton to grazing on ciliates. These results contrast with previous experiments under nutrient-replete conditions, where warming indirectly reduced phytoplankton biomass via increased zooplankton grazing. We conclude that the effect of ocean warming on marine plankton depends on the nutrient regime, and provide a mechanistic basis for understanding global change in marine ecosystems.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1111/ele.12265
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 3
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    Meta-analysis of cod-shrimp interactions reveals top-down control in oceanic food webs (2003)
    Wiley
    In:  Ecology, 84 (1). pp. 162-173.
    Details
    Publication Date: 2017-02-21
    Description: Here we present a meta-analytic approach to analyzing population interactions across the North Atlantic Ocean. We assembled all available biomass time series for a well-documented predator–prey couple, Atlantic cod (Gadus morhua) and northern shrimp (Pandalus borealis), to test whether the temporal dynamics of these populations are consistent with the “top-down” or the “bottom-up” hypothesis. Eight out of nine regions showed inverse correlations of cod and shrimp biomass supporting the “top-down” view. Exceptions occurred only close to the southern range limits of both species. Random-effects meta-analysis showed that shrimp biomass was strongly negatively related to cod biomass, but not to ocean temperature in the North Atlantic Ocean. In contrast, cod biomass was positively related to ocean temperature. The strength of the cod–shrimp relationship, however, declined with increasing mean temperature. These results show that changes in predator populations can have strong effects on prey populations in oceanic food webs, and that the strength of these interactions may be sensitive to changes in mean ocean temperature. This means that the effects of overfishing in the ocean cascade down to lower trophic levels, as has been shown previously for lakes and coastal seas. In order to further investigate these processes, we establish a methodological framework to analyze species interactions from time series data.
    Type: Article , PeerReviewed
    Format: text
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 4
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    UV effects that come and go: A global comparison of marine benthic community level impacts. (2004)
    Wiley
    In:  Global Change Biology, 10 (12). pp. 1962-1972.
    Details
    Publication Date: 2018-05-16
    Description: Ambient UV radiation has substantially increased during the last decades, but its impact on marine benthic communities is hardly known. The aim of this study was to globally compare and quantify how shallow hard-bottom communities are affected by UV during early succession. Identical field experiments in 10 different coastal regions of both hemispheres produced a consistent but unexpected pattern: (i) UV radiation affected species diversity and community biomass in a very similar manner, (ii) diversity and biomass were reduced to a larger extent by UVA than UVB radiation, (iii) ambient UV levels did not affect the composition of the communities, and (iv) any UV effects disappeared during species succession after 2–3 months. Thus, current levels of UV radiation seem to have small, predictable, and transient effects on shallow marine hard-bottom communities.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1111/j.1365-2486.2004.00872.x
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    OceanRep: Article in a Scientific Journal - peer-reviewed
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