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    Eutrophication erodes inter-basin variation in macrophytes and co-occurring invertebrates in a shallow lake: combining ecology and palaeoecology

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    SALGADO_ETAL_JOPL-D-16-00092_R ...
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    Authors
    Salgado, J
    Sayer, CD
    Brooks, SJ
    Davidson, TA
    Okamura, B cc
    Issue date
    2017-03-13
    Submitted date
    2019-03-01
    Subject Terms
    Anthropogenic impact
    Community heterogeneity
    Historical dynamics
    Light limitation
    Lough Erne System
    Multi-proxy study
    
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    Abstract
    Aquatic biodiversity is commonly linked with environmental variation in lake networks, but less is known about how local factors may influence within-lake biological heterogeneity. Using a combined ecological and multi-proxy palaeoecological approach we investigated long-term changes in the pathways and processes that underlie eutrophication and water depth effects on lake macrophyte and invertebrate communities across three basins in a shallow lake—Castle Lough, Northern Ireland, UK. Contemporary data allow us to assess how macrophyte assemblages vary in composition and heterogeneity according to basin-specific factors (e.g. variation in water depth), while palaeoecological data (macrophytes and co-occurring invertebrates) enable us to infer basin-specific impacts and susceptibilities to nutrient-enrichment. Results indicate that variability in water depth promotes assemblage variation amongst the lake basins, stimulating within-lake macrophyte assemblage heterogeneity and hence higher lake biodiversity. The palaeo-data indicate that eutrophication has acted as a strong homogenising agent of macrophyte and invertebrate diversities and abundances over time at the whole-lake scale. This novel finding strongly suggests that, as eutrophication advances, the influence of water depth on community heterogeneity is gradually eroded and that ultimately a limited set of eutrophication-tolerant species will become homogeneously distributed across the entire lake.
    Citation
    Salgado, J., Sayer, C.D., Brooks, S.J. et al. J Paleolimnol (2018) 60: 311. https://doi.org/10.1007/s10933-017-9950-6
    Publisher
    Springer
    Journal
    Journal of Paleolimnology
    URI
    http://hdl.handle.net/10141/622469
    DOI
    10.1007/s10933-017-9950-6
    Type
    Journal Article
    Item Description
    © Springer Science+Business Media Dordrecht 2017. This is a post-peer-review, pre-copyedit version of an article published in Journal of Paleolimnology. The final authenticated version is available online at: http://dx.doi.org/0.1007/s10933-017-9950-6. You are advised to consult the publisher’s version if you wish to cite from it.
    NHM Repository
    ISSN
    0921-2728
    EISSN
    1573-0417
    ae974a485f413a2113503eed53cd6c53
    10.1007/s10933-017-9950-6
    Scopus Count
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    Life sciences

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