The influence of a large SW Atlantic shelf-break frontal system on epibenthic community composition, trophic guilds, and diversity

Productivity gradients (i.e., through bottom-up control) have an important influence on variability in species diversity and community composition in marine systems. At the SW Atlantic shelf-break front (SBF), we hypothesized that a high and stable food supply in areas under the core of a frontal in...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Mauna, A.C., Acha, E.M., Lasta, M.L., Iribarne, O.O.
Formato: JOUR
Lenguaje:English
Materias:
Community Composition
Diversity
Epibenthos
Marine Fronts
SW Atlantic
benthos
bivalve
echinoderm
food supply
grazing
marine ecosystem
shelf break
spatial variation
species diversity
sponge
trophic conditions
water mass
Atlantic Ocean
Atlantic Ocean (Southwest)
Asteroidea
Chaetopterus variopedatus
Ctenodiscus
Echinoidea
Gorgonocephalus chilensis
Ophiacantha vivipara
Ophiuroidea
Zygochlamys patagonica
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_13851101_v66_n1_p39_Mauna
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_13851101_v66_n1_p39_Mauna
record_format dspace
spelling todo:paper_13851101_v66_n1_p39_Mauna2023-10-03T16:12:05Z The influence of a large SW Atlantic shelf-break frontal system on epibenthic community composition, trophic guilds, and diversity Mauna, A.C. Acha, E.M. Lasta, M.L. Iribarne, O.O. Community Composition Diversity Epibenthos Marine Fronts SW Atlantic benthos bivalve echinoderm food supply grazing marine ecosystem shelf break spatial variation species diversity sponge trophic conditions water mass Atlantic Ocean Atlantic Ocean (Southwest) Asteroidea Chaetopterus variopedatus Ctenodiscus Echinoidea Gorgonocephalus chilensis Ophiacantha vivipara Ophiuroidea Zygochlamys patagonica Productivity gradients (i.e., through bottom-up control) have an important influence on variability in species diversity and community composition in marine systems. At the SW Atlantic shelf-break front (SBF), we hypothesized that a high and stable food supply in areas under the core of a frontal influence (F) promotes a different benthic community structure (i.e., species diversity, taxa biomasses, and composition of feeding guilds) than in areas located under marginal influences of the front (M). In 2007, we sampled 34 trawling stations located across the SBF to evaluate this hypothesis. We compared epibenthic community composition, diversity indices, and species and trophic guild biomass in F and M areas. We observed differences in community composition, predator biomass, and the biomass of some taxa. However, we did not detect any changes in diversity indices, suspension feeder biomass, or grazer-omnivore biomass. The scallop, Zygochlamys patagonica, sponges, and the brittle star, Ophiacantha vivipara, together with the sea star Diplasterias brandtii characterized frontal areas. Marginal areas were characterized by the scallop, Z. patagonica, the parchment worm, Chaetopterus variopedatus, the basket star, Gorgonocephalus chilensis, the sea urchin, Austrocidaris canaliculata, and the sea star, Ctenodiscus australis. These shifts in taxa were not always reflected in biomass differences between areas. These results demonstrate that spatial variations in oceanographic structure, even over spatial scales of tens of kilometers, can affect composition and shift species dominance in benthic communities. © 2011 Elsevier B.V. JOUR English info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_13851101_v66_n1_p39_Mauna
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
language English
orig_language_str_mv English
topic Community Composition
Diversity
Epibenthos
Marine Fronts
SW Atlantic
benthos
bivalve
echinoderm
food supply
grazing
marine ecosystem
shelf break
spatial variation
species diversity
sponge
trophic conditions
water mass
Atlantic Ocean
Atlantic Ocean (Southwest)
Asteroidea
Chaetopterus variopedatus
Ctenodiscus
Echinoidea
Gorgonocephalus chilensis
Ophiacantha vivipara
Ophiuroidea
Zygochlamys patagonica
spellingShingle Community Composition
Diversity
Epibenthos
Marine Fronts
SW Atlantic
benthos
bivalve
echinoderm
food supply
grazing
marine ecosystem
shelf break
spatial variation
species diversity
sponge
trophic conditions
water mass
Atlantic Ocean
Atlantic Ocean (Southwest)
Asteroidea
Chaetopterus variopedatus
Ctenodiscus
Echinoidea
Gorgonocephalus chilensis
Ophiacantha vivipara
Ophiuroidea
Zygochlamys patagonica
Mauna, A.C.
Acha, E.M.
Lasta, M.L.
Iribarne, O.O.
The influence of a large SW Atlantic shelf-break frontal system on epibenthic community composition, trophic guilds, and diversity
topic_facet Community Composition
Diversity
Epibenthos
Marine Fronts
SW Atlantic
benthos
bivalve
echinoderm
food supply
grazing
marine ecosystem
shelf break
spatial variation
species diversity
sponge
trophic conditions
water mass
Atlantic Ocean
Atlantic Ocean (Southwest)
Asteroidea
Chaetopterus variopedatus
Ctenodiscus
Echinoidea
Gorgonocephalus chilensis
Ophiacantha vivipara
Ophiuroidea
Zygochlamys patagonica
description Productivity gradients (i.e., through bottom-up control) have an important influence on variability in species diversity and community composition in marine systems. At the SW Atlantic shelf-break front (SBF), we hypothesized that a high and stable food supply in areas under the core of a frontal influence (F) promotes a different benthic community structure (i.e., species diversity, taxa biomasses, and composition of feeding guilds) than in areas located under marginal influences of the front (M). In 2007, we sampled 34 trawling stations located across the SBF to evaluate this hypothesis. We compared epibenthic community composition, diversity indices, and species and trophic guild biomass in F and M areas. We observed differences in community composition, predator biomass, and the biomass of some taxa. However, we did not detect any changes in diversity indices, suspension feeder biomass, or grazer-omnivore biomass. The scallop, Zygochlamys patagonica, sponges, and the brittle star, Ophiacantha vivipara, together with the sea star Diplasterias brandtii characterized frontal areas. Marginal areas were characterized by the scallop, Z. patagonica, the parchment worm, Chaetopterus variopedatus, the basket star, Gorgonocephalus chilensis, the sea urchin, Austrocidaris canaliculata, and the sea star, Ctenodiscus australis. These shifts in taxa were not always reflected in biomass differences between areas. These results demonstrate that spatial variations in oceanographic structure, even over spatial scales of tens of kilometers, can affect composition and shift species dominance in benthic communities. © 2011 Elsevier B.V.
format JOUR
author Mauna, A.C.
Acha, E.M.
Lasta, M.L.
Iribarne, O.O.
author_facet Mauna, A.C.
Acha, E.M.
Lasta, M.L.
Iribarne, O.O.
author_sort Mauna, A.C.
title The influence of a large SW Atlantic shelf-break frontal system on epibenthic community composition, trophic guilds, and diversity
title_short The influence of a large SW Atlantic shelf-break frontal system on epibenthic community composition, trophic guilds, and diversity
title_full The influence of a large SW Atlantic shelf-break frontal system on epibenthic community composition, trophic guilds, and diversity
title_fullStr The influence of a large SW Atlantic shelf-break frontal system on epibenthic community composition, trophic guilds, and diversity
title_full_unstemmed The influence of a large SW Atlantic shelf-break frontal system on epibenthic community composition, trophic guilds, and diversity
title_sort influence of a large sw atlantic shelf-break frontal system on epibenthic community composition, trophic guilds, and diversity
url http://hdl.handle.net/20.500.12110/paper_13851101_v66_n1_p39_Mauna
work_keys_str_mv AT maunaac theinfluenceofalargeswatlanticshelfbreakfrontalsystemonepibenthiccommunitycompositiontrophicguildsanddiversity
AT achaem theinfluenceofalargeswatlanticshelfbreakfrontalsystemonepibenthiccommunitycompositiontrophicguildsanddiversity
AT lastaml theinfluenceofalargeswatlanticshelfbreakfrontalsystemonepibenthiccommunitycompositiontrophicguildsanddiversity
AT iribarneoo theinfluenceofalargeswatlanticshelfbreakfrontalsystemonepibenthiccommunitycompositiontrophicguildsanddiversity
AT maunaac influenceofalargeswatlanticshelfbreakfrontalsystemonepibenthiccommunitycompositiontrophicguildsanddiversity
AT achaem influenceofalargeswatlanticshelfbreakfrontalsystemonepibenthiccommunitycompositiontrophicguildsanddiversity
AT lastaml influenceofalargeswatlanticshelfbreakfrontalsystemonepibenthiccommunitycompositiontrophicguildsanddiversity
AT iribarneoo influenceofalargeswatlanticshelfbreakfrontalsystemonepibenthiccommunitycompositiontrophicguildsanddiversity
_version_ 1807316568496930816

Ejemplares similares