Drivers of abundance and spatial distribution in Southern Ocean peracarid crustacea

The Southern Ocean (SO) continental shelf and deep sea are environments characterised by different benthic communities. Their structure and composition are driven and shaped by different variables: whilst on the continental shelf physical environmental variables are the main drivers shaping faunal a...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Davide Di Franco, Katrin Linse, Huw J. Griffiths, Angelika Brandt
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Macrobenthos Environmental factors Benthic environment Marine invertebrates Peracarida Depth Ecology QH540-549.5
Acceso en línea:	https://doaj.org/article/b890cee82493481c92a195bd5e26b46a
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:b890cee82493481c92a195bd5e26b46a
record_format	dspace
spelling	oai:doaj.org-article:b890cee82493481c92a195bd5e26b46a2021-12-01T04:54:09ZDrivers of abundance and spatial distribution in Southern Ocean peracarid crustacea1470-160X10.1016/j.ecolind.2021.107832https://doaj.org/article/b890cee82493481c92a195bd5e26b46a2021-09-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S1470160X21004970https://doaj.org/toc/1470-160XThe Southern Ocean (SO) continental shelf and deep sea are environments characterised by different benthic communities. Their structure and composition are driven and shaped by different variables: whilst on the continental shelf physical environmental variables are the main drivers shaping faunal abundance, structure and composition, the deep-sea fauna is most problably driven by biological variables such as predation and competition. Among shelf and deep-sea benthic communities, peracarids (e.g. amphipods and isopods) are one of the most dominant groups, showing high levels of abundance and diversity in both environments. Knowledge on their assemblage structure and composition in the SO remains limited, as well as the knowledge of the environmental variables that influence them. Therefore, the aim of our study was to investigate peracarid assemblages from the SO continental shelf and deep sea and to assess the main drivers shaping their assemblage structure along a wide bathymetric gradient (from 160 m to about 6000 m depth) and at a large geographic scale. We analysed the spatial distribution of 183,606 peracarids sampled using an epibenthic sledge (EBS) during nine different expeditions in the SO, covering a latitudinal range of 77° to 41° South. Depth was identified as the main driver shaping peracarid abundance pattern, their assemblage structure from the continental shelf (<1499 m) was dissimilar to that from the deep sea (>1500 m). Also, depth was differently correlated with different peracarid orders: while isopod abundances increased with depth, amphipods and mysids were negatively correlated; no correlation was found with cumaceans and tanaidaceans. The dissimilar peracarid assemblage structure between the SO continental shelf and the SO deep sea can be due to the assumption that there are different driving forces shaping benthic assemblages from these two environments (physical variables on the continental shelf, biological interactions in the deep sea). As a result, we also suggest that environmental changes due to climate change (e.g. temperature, ice coverage, productivity) would have different consequences depending on the bathymetric range considered.Davide Di FrancoKatrin LinseHuw J. GriffithsAngelika BrandtElsevierarticleMacrobenthosEnvironmental factorsBenthic environmentMarine invertebratesPeracaridaDepthEcologyQH540-549.5ENEcological Indicators, Vol 128, Iss , Pp 107832- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Macrobenthos Environmental factors Benthic environment Marine invertebrates Peracarida Depth Ecology QH540-549.5
spellingShingle	Macrobenthos Environmental factors Benthic environment Marine invertebrates Peracarida Depth Ecology QH540-549.5 Davide Di Franco Katrin Linse Huw J. Griffiths Angelika Brandt Drivers of abundance and spatial distribution in Southern Ocean peracarid crustacea
description	The Southern Ocean (SO) continental shelf and deep sea are environments characterised by different benthic communities. Their structure and composition are driven and shaped by different variables: whilst on the continental shelf physical environmental variables are the main drivers shaping faunal abundance, structure and composition, the deep-sea fauna is most problably driven by biological variables such as predation and competition. Among shelf and deep-sea benthic communities, peracarids (e.g. amphipods and isopods) are one of the most dominant groups, showing high levels of abundance and diversity in both environments. Knowledge on their assemblage structure and composition in the SO remains limited, as well as the knowledge of the environmental variables that influence them. Therefore, the aim of our study was to investigate peracarid assemblages from the SO continental shelf and deep sea and to assess the main drivers shaping their assemblage structure along a wide bathymetric gradient (from 160 m to about 6000 m depth) and at a large geographic scale. We analysed the spatial distribution of 183,606 peracarids sampled using an epibenthic sledge (EBS) during nine different expeditions in the SO, covering a latitudinal range of 77° to 41° South. Depth was identified as the main driver shaping peracarid abundance pattern, their assemblage structure from the continental shelf (<1499 m) was dissimilar to that from the deep sea (>1500 m). Also, depth was differently correlated with different peracarid orders: while isopod abundances increased with depth, amphipods and mysids were negatively correlated; no correlation was found with cumaceans and tanaidaceans. The dissimilar peracarid assemblage structure between the SO continental shelf and the SO deep sea can be due to the assumption that there are different driving forces shaping benthic assemblages from these two environments (physical variables on the continental shelf, biological interactions in the deep sea). As a result, we also suggest that environmental changes due to climate change (e.g. temperature, ice coverage, productivity) would have different consequences depending on the bathymetric range considered.
format	article
author	Davide Di Franco Katrin Linse Huw J. Griffiths Angelika Brandt
author_facet	Davide Di Franco Katrin Linse Huw J. Griffiths Angelika Brandt
author_sort	Davide Di Franco
title	Drivers of abundance and spatial distribution in Southern Ocean peracarid crustacea
title_short	Drivers of abundance and spatial distribution in Southern Ocean peracarid crustacea
title_full	Drivers of abundance and spatial distribution in Southern Ocean peracarid crustacea
title_fullStr	Drivers of abundance and spatial distribution in Southern Ocean peracarid crustacea
title_full_unstemmed	Drivers of abundance and spatial distribution in Southern Ocean peracarid crustacea
title_sort	drivers of abundance and spatial distribution in southern ocean peracarid crustacea
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/b890cee82493481c92a195bd5e26b46a
work_keys_str_mv	AT davidedifranco driversofabundanceandspatialdistributioninsouthernoceanperacaridcrustacea AT katrinlinse driversofabundanceandspatialdistributioninsouthernoceanperacaridcrustacea AT huwjgriffiths driversofabundanceandspatialdistributioninsouthernoceanperacaridcrustacea AT angelikabrandt driversofabundanceandspatialdistributioninsouthernoceanperacaridcrustacea
_version_	1718405684885716992

Drivers of abundance and spatial distribution in Southern Ocean peracarid crustacea

Ejemplares similares