Comparison of independently derived benthic invertebrate and demersal fish ecoregionalisations for the Kerguelen Plateau
2019
Ecoregionalisation is a process that aims to identify
areas with distinct biological content and associated
environmental conditions. It improves on many
traditional approaches to regionalisation by explicitly
incorporating biological data into classifications.
Ecoregionalisations are useful for improving our ecological
understanding of marine ecosystems and for
informing spatial management. This includes providing
information to aid in defining and prioritising areas for
conservation, evaluating current spatial management
arrangements, targeting monitoring efforts and managing
human activities (e.g. Grant et al., 2006; Douglass et
al., 2014). The Kerguelen Plateau is a highly productive
region of the southern Indian Ocean that supports lucrative
demersal fisheries (Duhamel and Welsford, 2011).
It is subject to spatial management in the form of marine
protected areas (MPAs) with varying levels of protection
(Commonwealth of Australia, 2014; Koubbi et al.,
2016). Recently two ecoregionalisations have been independently
generated for the northern Kerguelen Plateau;
one for benthic invertebrates (Martin et al., 2018) and
another for demersal fish (Hill et al., 2017). Here we
conduct a preliminary analysis examining the congruence
between these ecoregionalisations that represent
different components of the demersal ecosystem.
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