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Joint effects of patch edges and habitat degradation on faunal predation risk in a widespread marine foundation species

Hovel Kevin A., Duffy J. Emmett, Stachowicz John J., Reynolds Pamela, Boström Christoffer, Boyer Katharyn E., Cimon Stéphanie, Cusson Mathieu, Fodrie Fredrick Joel, Gagnon Karine, Hereu Clara M., Hori Masakazu, Jorgensen Pablo, Kruschel Claudia, Lee Kun‐Seop, Nakaoka Masahiro, O’Connor Nessa E., Rossi Francesca, Ruesink Jennifer, Tomas Fiona et Ziegler Shelby. (2021). Joint effects of patch edges and habitat degradation on faunal predation risk in a widespread marine foundation species. Ecology, 102, (5), e03316.

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URL officielle: http://dx.doi.org/doi:10.1002/ecy.3316

Résumé

Human activities degrade and fragment coastal marine habitats, reducing their structural complexity and making habitat edges a prevalent seascape feature. Though habitat edges frequently are implicated in reduced faunal survival and biodiversity, results of experiments on edge effects have been inconsistent, calling for a mechanistic approach to the study of edges that explicitly includes indirect and interactive effects of habitat alteration at multiple scales across biogeographic gradients. We used an experimental network spanning 17 eelgrass (Zostera marina) sites across the Atlantic and Pacific oceans and the Mediterranean Sea to determine (1) if eelgrass edges consistently increase faunal predation risk, (2) whether edge effects on predation risk are altered by habitat degradation (shoot thinning), and (3) whether variation in the strength of edge effects among sites can be explained by biogeographical variability in covarying eelgrass habitat features. Contrary to expectations, at most sites, predation risk for tethered crustaceans (crabs or shrimps) was lower along patch edges than in patch interiors, regardless of the extent of habitat degradation. However, the extent to which edges reduced predation risk, compared to the patch interior, was correlated with the extent to which edges supported higher eelgrass structural complexity and prey biomass compared to patch interiors. This suggests an indirect component to edge effects in which the impact of edge proximity on predation risk is mediated by the effect of edges on other key biotic factors. Our results suggest that studies on edge effects should consider structural characteristics of patch edges, which may vary geographically, and multiple ways that humans degrade habitats.

Type de document:Article publié dans une revue avec comité d'évaluation
ISSN:0012-9658
Volume:102
Numéro:5
Pages:e03316
Version évaluée par les pairs:Oui
Date:2021
Identifiant unique:10.1002/ecy.3316
Sujets:Sciences naturelles et génie > Sciences appliquées > Eau et environnement
Sciences naturelles et génie > Sciences naturelles > Biologie et autres sciences connexes
Département, module, service et unité de recherche:Départements et modules > Département des sciences fondamentales
Mots-clés:edge effects, habitat structure, mortality, predation, seagrass, Zostera marina
Informations complémentaires:"This is the peer reviewed version of the following article: Hovel KA, Duffy JE, Stachowicz JJ, Reynolds P, Boström C, Boyer KE, Cimon S, Cusson M, Fodrie FJ, Gagnon K, Hereu CM, Hori M, Jorgensen P, Kruschel C, Lee KS, Nakaoka M, O’Connor NE, Rossi F, Ruesink J, Tomas F et Ziegler S. 2021. Joint effects of patch edges and habitat degradation on faunal predation risk in a widespread marine foundation species. Ecology, 102., which has been published in final form at https://doi.org/10.1002/ecy.3316. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited."
Déposé le:26 avr. 2022 21:43
Dernière modification:03 mai 2022 04:10
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