Section: Ecology
Topic: Ecology, Environmental sciences

The persistence in time of distributional patterns in marine megafauna impacts zonal conservation strategies

Lambert, Charlotte1   ; Dorémus, Ghislain2 ; Ridoux, Vincent1, 2 
1 Centre d'Études Biologiques de Chizé, UMR 7372 CNRS-La Rochelle Université, 5 allées de l'Océan, 17000 La Rochelle, France
2 Observatoire Pelagis, UMS 3462 CNRS-La Rochelle Université, 5 allées de l'Océan, 17000 La Rochelle, France

Corresponding author(s): Lambert, Charlotte (charlotte.anne.lambert@gmail.com)

10.24072/pcjournal.46 - Peer Community Journal, Volume 1 (2021), article no. e39.

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The main type of zonal conservation approach corresponds to Marine Protected Areas (MPAs), which are spatially defined and generally static entities aiming at the protection of some target populations by the implementation of a management plan. For highly mobile species the relevance of an MPA over time might be hampered by temporal variations in distributions or home ranges. In the present work, we used habitat model-based predicted distributions of cetaceans and seabirds within the Bay of Biscay from 2004 to 2017 to characterise the aggregation and persistence of mobile species distributional patterns and the relevance of the existing MPA network. We explored the relationship between population abundance and spatial extent of distribution to assess the aggregation level of species distribution. We used the smallest spatial extent including 75% of the population present in the Bay of Biscay to define specific core areas of distributions, and calculated their persistence over the 14 studied years. We inspected the relevance of the MPA network with respect to aggregation and persistence. We found that aggregation and persistence are two independent features of marine megafauna distributions. Indeed, strong persistence was shown in both aggregated (bottlenose dolphins, auks) and loosely distributed species (northern gannets), while some species with aggregated distributions also showed limited year-to-year persistence in their patterns (black-legged kittiwakes). We thus have demonstrated that both aggregation and persistence have potential impact on the amount of spatio-temporal distributional variability encompassed within static MPAs. Our results exemplified the need to have access to a minimal temporal depth in the species distribution data when aiming to designate new site boundaries for the conservation of mobile species.
Published online:
DOI: 10.24072/pcjournal.46
Type: Research article

Lambert, Charlotte 1; Dorémus, Ghislain 2; Ridoux, Vincent 1, 2

1 Centre d'Études Biologiques de Chizé, UMR 7372 CNRS-La Rochelle Université, 5 allées de l'Océan, 17000 La Rochelle, France
2 Observatoire Pelagis, UMS 3462 CNRS-La Rochelle Université, 5 allées de l'Océan, 17000 La Rochelle, France
License: CC-BY 4.0
Copyrights: The authors retain unrestricted copyrights and publishing rights 
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Lambert, C.; Dorémus, G.; Ridoux, V. The persistence in time of distributional patterns in marine megafauna impacts zonal conservation strategies. Peer Community Journal, Volume 1 (2021), article  no. e39. https://doi.org/10.24072/pcjournal.46

PCI peer reviews and recommendation, and links to data, scripts, code and supplementary information: 10.24072/pci.ecology.100048

Conflict of interest of the recommender and peer reviewers:
The recommender in charge of the evaluation of the article and the reviewers declared that they have no conflict of interest (as defined in the code of conduct of PCI) with the authors or with the content of the article.

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