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Effects of habitat-forming species richness, evenness, identity, and abundance on benthic intertidal community establishment and productivity

Lemieux Julie et Cusson Mathieu. (2014). Effects of habitat-forming species richness, evenness, identity, and abundance on benthic intertidal community establishment and productivity. PloS one, 9, (10), e109261.

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URL officielle: http://dx.doi.org/doi:10.1371/journal.pone.0109261

Résumé

In a context of reduced global biodiversity, the potential impacts from the loss of habitat-forming species (HFS) on ecosystem structure and functioning must be established. These species are often the main community primary producers and have a major role in the establishment of organisms through facilitation processes. This study focuses on macroalgae and mussels as HFS within an intertidal zone along the St. Lawrence estuary (Quebec, Canada). Over a 16-week period, we manipulated the in situ diversity profile (richness, evenness, identity, and abundance) of the dominant HFS (Fucus distichus edentatus, F. vesiculosus, and Mytilus spp.) in order to define their role in both the establishment of associated species and community primary production. Contrary to expectation, no general change in HFS richness, evenness, abundance, or identity on associated species community establishment was observed. However, over the study period, the HFS diversity profile modified the structure within the trophic guilds, which may potentially affect further community functions. Also, our results showed that the low abundance of HFS had a negative impact on the primary productivity of the community. Our results suggest that HFS diversity profiles have a limited short-term role in our study habitat and may indicate that biological forcing in these intertidal communities is less important than environmental conditions. As such, there was an opportunistic establishment of species that ensured rapid colonization regardless of the absence, or the diversity profile, of facilitators such as HFS.

Type de document:Article publié dans une revue avec comité d'évaluation
Volume:9
Numéro:10
Pages:e109261
Version évaluée par les pairs:Oui
Date:Octobre 2014
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:biodiversity, benthic fauna, community structure, habitat-forming species, richness, evenness, identity, abundance, estuary, macroalgae, mussels
Déposé le:10 mars 2016 23:11
Dernière modification:05 déc. 2016 20:55
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