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  • Discriminatory power of different arthropod data sets for the biological monitoring of anthropogenic disturbance in tropical forests

    Author(s)
    Basset, Y
    Mavoungou, JF
    Mikissa, JB
    Missa, O
    Miller, SE
    Kitching, RL
    Alonso, A
    Griffith University Author(s)
    Kitching, Roger L.
    Year published
    2004
    Metadata
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    Abstract
    Arthropods were monitored by local parataxonomists at 12 sites of increasing anthropogenic disturbance (old and young secondary forests, savanna and cultivated gardens) at Gamba, Gabon. We report on the discriminatory power of different data sets with regard to the classification of sites along the disturbance gradient, using preliminary data accounting for 13 surveys and 142425 arthropods collected by Malaise, pitfall and yellow-pan traps. We compared the performance of different data sets. These were based upon ordinal, familial and guild composition, or upon 22 target taxa sorted to morphospecies and either considered in ...
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    Arthropods were monitored by local parataxonomists at 12 sites of increasing anthropogenic disturbance (old and young secondary forests, savanna and cultivated gardens) at Gamba, Gabon. We report on the discriminatory power of different data sets with regard to the classification of sites along the disturbance gradient, using preliminary data accounting for 13 surveys and 142425 arthropods collected by Malaise, pitfall and yellow-pan traps. We compared the performance of different data sets. These were based upon ordinal, familial and guild composition, or upon 22 target taxa sorted to morphospecies and either considered in toto or grouped within different functional guilds. Finally we evaluated lsquopredictor setsrsquo made up of a few families or other target taxa, selected on the basis of their indicator value index. Although the discriminatory power of data sets based on ordinal categories and guilds was low, that of target taxa belonging to chewers, parasitoids and predators was much higher. The data sets that best discriminated among sites of differing degrees of disturbance were the restricted sets of indicator families and target taxa. This validates the concept of predictor sets for species-rich tropical systems. Including or excluding rare taxa in the analyses did not alter these conclusions. We conclude that calibration studies similar to ours are needed elsewhere in the tropics and that this strategy will allow to devise a representative and efficient biotic index for the biological monitoring of terrestrial arthropod assemblages in the tropics.
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    Journal Title
    Biodiversity and Conservation
    Volume
    13
    Issue
    4
    Publisher URI
    http://www.springer.com/life+sci/journal/10531
    DOI
    https://doi.org/10.1023/B:BIOC.0000011722.44714.a4
    Copyright Statement
    Copyright Kluwer 2004. The original publication is available at www.springerlink.com
    Subject
    Ecology
    History, heritage and archaeology
    Publication URI
    http://hdl.handle.net/10072/5190
    Collection
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