Data/hora: 14/06/2024 16:08:10

Provedor de dados: | 5
País: | France
Título: | Effets ingénieurs auto- et allogénique de l’espèce invasive Crepidula fornicata (Linnaeus, 1758) sur la diversité structurelle et fonctionnelle des habitats benthiques colonisés de la rade de Brest
Autores: | Vallee, Vincent.
Data: | 2016
Ano: | 2016
Palavras-chave: | Crepidula fornicata; Espèce ingénieur; Diversité structurelle; Diversité fonctionnelle; Analyse des traits biologiques; Rade de Brest; Crepidula fornicata; Ecosystem engineer; Structural diversity; Functional diversity; Biological traits analysis; Bay of Brest.
Resumo: | The non-native slipper limpet Crepidula fornicata (Linnaeus, 1758) has proliferated in the Bay of Brest during the 90s. This suspension-feeding gastropod has become a dominant species both in terms of density (&gt; 2000 ind.m-2) and biomass (127 000 t fresh weight in 2000). C. fornicata is also an ecosystem engineer that modifies its habitat by the presence of its own shell (autogenic engineering) and by biodeposition of faeces and pseudo-faeces (allogenic engineering). Here, we tested the effects of C. fornicata on the colonized communities’ structural and functional diversity by distinguishing his auto- and allogenic engineering effects. One way these changes were studied along a gradient characterized by the total weight of slipper limpet (dead and alive). The structural diversity indexes (specific diversity, Shannon index and Pielou index) don’t show any significant trend along the gradient of the total weight of slipper limpet. However, a significant and increasing relationship is evidenced regarding the macrofaunal abundance along the gradient. The functional diversity was described through the use of biological traits analysis (BTA). Our results suggest the formation of 4 distinct functional groups. Frequencies analysis of these groups along a gradient characterized by the total weight of slipper limpet allowed us to describe the autogenic effect alone and the combined auto- and allogenic effects of the slipper limpet on the associated benthic communities. Our work highlights that changes regarding functional diversity are greater than the ones affecting structural diversity and that autogenic effects are dominant in comparison with allogenic ones.
Tipo: | Text
Idioma: | Francês

Identificador:

http://archimer.ifremer.fr/doc/00368/47920/47949.pdf

http://archimer.ifremer.fr/doc/00368/47920/

Formato: | application/pdf

Fonte:

2016 Université de Bordeaux

info:eu-repo/semantics/openAccess

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