Changes in deep-sea fish and crustacean communities at 1000-2200m in the Western Mediterranean after 25years: Relation to hydro-climatic conditions

Changes in deep-sea fish and crustacean communities at 1000-2200m in the Western Mediterranean after 25years: Relation to hydro-climatic conditions

16 pages, 7 figures, 7 tables

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Bibliographic Details
Main Authors: Cartes, Joan Enric, Maynou, Francesc, Fanelli, Emanuela, López-Pérez, C., Papiol, Vanesa
Format: artículo biblioteca
Published: Elsevier 2015-03
Subjects:Deep sea, Fish, Decapod crustacean, Western Mediterranean, Long-term, Hydro-climatic conditions, NAO, Dissolved oxygen,
Online Access:http://hdl.handle.net/10261/113427
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spelling dig-icm-es-10261-1134272019-03-06T12:08:02Z Changes in deep-sea fish and crustacean communities at 1000-2200m in the Western Mediterranean after 25years: Relation to hydro-climatic conditions Cartes, Joan Enric Maynou, Francesc Fanelli, Emanuela López-Pérez, C. Papiol, Vanesa Deep sea Fish Decapod crustacean Western Mediterranean Long-term Hydro-climatic conditions NAO Dissolved oxygen 16 pages, 7 figures, 7 tables Long-term changes in the biomass, diversity and composition of deep-living fish and decapods from the Balearic Basin (western Mediterranean) have been compared between two periods, 1985-1992 vs. 2007-2012, based on 106 bottom trawls performed at 1000-2250m. Relationships have been identified between the changes in community composition and the hydroclimatic conditions (e.g. NAO, temperature, salinity and dissolved O2) of the area. We found a generalized deepening of middle-slope communities (950-1250m), especially among decapods, which is suggested (from GLM results) to have been a response to the long-term increase in salinity of the Levantine Intermediate Waters (LIW), located above the level sampled to ca. 700m. Even more pronounced was the shallowing of all of the lower slope species (1600-2250m), accompanied by a significant decrease of biomass from 1985-1992 to 2007-2012. This last tendency would be done to a combination of factors: long-term decrease of O2 in the bottom-boundary layer, greater degradation of POM arriving on the bottom due to temperature increase in the Western Mediterranean Deep Waters (WMDW) and probably a decrease of Chl a at the surface and, thus, of production. The influence of climatic oscillations (NAO) on differences found between 1985-1992 and 2007-2012 seems secondary, likely because the NAO did not show significant differences between the two periods. Some plankton-feeding species showed an increase of density during high/positive NAO (e.g. Alepocephalus rostratus), while some benthos feeders increased during low/negative NAO (e.g. Aristeus antennatus, mainly juveniles). The increase of rainfall and advective fluxes under low/negative NAO (i.e., in 2007-2012) may increase the formation of the nepheloid layer identified over 1200-1400m in the area (Cartes et al., 2013a), linked to zooplankton aggregation in that depth range. Greater food availability could explain the generalized migration by both middle and lower slope species toward these intermediate depths that acquired greater trophic resources. Deep-sea Mediterranean fish and invertebrates, including important commercial species, seemed to undergo long-term changes in its distribution and biomass due to changes in hydro-climatic conditions, mainly a decrease of O2 in the bottom-boundary layer. © 2014 Elsevier B.V. This study was performed and financed within the framework of the MICYT project ANTROMARE (CTM2009-12214-C02-01-MAR). The study was possible thanks to the data obtained from previous projects (BATIMAR, ZONAP) in the 1980s–90s Peer Reviewed 2015-04-09T10:40:31Z 2015-04-09T10:40:31Z 2015-03 2015-04-09T10:40:31Z artículo http://purl.org/coar/resource_type/c_6501 doi: 10.1016/j.jmarsys.2014.10.015 issn: 0924-7963 e-issn: 1879-1573 Journal of Marine Systems 143: 138-153 (2015) http://hdl.handle.net/10261/113427 10.1016/j.jmarsys.2014.10.015 http://dx.doi.org/10.1016/j.jmarsys.2014.10.015 none Elsevier
institution ICM ES
collection DSpace
country España
countrycode ES
component Bibliográfico
access En linea
databasecode dig-icm-es
tag biblioteca
region Europa del Sur
libraryname Biblioteca del ICM España
topic Deep sea
Fish
Decapod crustacean
Western Mediterranean
Long-term
Hydro-climatic conditions
NAO
Dissolved oxygen
Deep sea
Fish
Decapod crustacean
Western Mediterranean
Long-term
Hydro-climatic conditions
NAO
Dissolved oxygen
spellingShingle Deep sea
Fish
Decapod crustacean
Western Mediterranean
Long-term
Hydro-climatic conditions
NAO
Dissolved oxygen
Deep sea
Fish
Decapod crustacean
Western Mediterranean
Long-term
Hydro-climatic conditions
NAO
Dissolved oxygen
Cartes, Joan Enric
Maynou, Francesc
Fanelli, Emanuela
López-Pérez, C.
Papiol, Vanesa
Changes in deep-sea fish and crustacean communities at 1000-2200m in the Western Mediterranean after 25years: Relation to hydro-climatic conditions
description 16 pages, 7 figures, 7 tables
format artículo
topic_facet Deep sea
Fish
Decapod crustacean
Western Mediterranean
Long-term
Hydro-climatic conditions
NAO
Dissolved oxygen
author Cartes, Joan Enric
Maynou, Francesc
Fanelli, Emanuela
López-Pérez, C.
Papiol, Vanesa
author_facet Cartes, Joan Enric
Maynou, Francesc
Fanelli, Emanuela
López-Pérez, C.
Papiol, Vanesa
author_sort Cartes, Joan Enric
title Changes in deep-sea fish and crustacean communities at 1000-2200m in the Western Mediterranean after 25years: Relation to hydro-climatic conditions
title_short Changes in deep-sea fish and crustacean communities at 1000-2200m in the Western Mediterranean after 25years: Relation to hydro-climatic conditions
title_full Changes in deep-sea fish and crustacean communities at 1000-2200m in the Western Mediterranean after 25years: Relation to hydro-climatic conditions
title_fullStr Changes in deep-sea fish and crustacean communities at 1000-2200m in the Western Mediterranean after 25years: Relation to hydro-climatic conditions
title_full_unstemmed Changes in deep-sea fish and crustacean communities at 1000-2200m in the Western Mediterranean after 25years: Relation to hydro-climatic conditions
title_sort changes in deep-sea fish and crustacean communities at 1000-2200m in the western mediterranean after 25years: relation to hydro-climatic conditions
publisher Elsevier
publishDate 2015-03
url http://hdl.handle.net/10261/113427
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AT fanelliemanuela changesindeepseafishandcrustaceancommunitiesat10002200minthewesternmediterraneanafter25yearsrelationtohydroclimaticconditions
AT lopezperezc changesindeepseafishandcrustaceancommunitiesat10002200minthewesternmediterraneanafter25yearsrelationtohydroclimaticconditions
AT papiolvanesa changesindeepseafishandcrustaceancommunitiesat10002200minthewesternmediterraneanafter25yearsrelationtohydroclimaticconditions
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