Shift in seasonal amplitude and synchronicity of zooplankton in the northwest Iberian shelf driven by meteo-hydrographic forcing
We have investigated zooplankton temporal dynamics in the northwest Iberian shelf, a temperate ecosystem subject to coastal upwelling-donnwelling processes. To this aim, we have applied wavelet analysis, a methodology able to cope with non-stationary dynamics, to monthly time series of zooplankton a...
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Centro Oceanográfico de Vigo
2014
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ftieo:oai:repositorio.ieo.es:10508/2185 2023-05-15T17:34:47+02:00 Shift in seasonal amplitude and synchronicity of zooplankton in the northwest Iberian shelf driven by meteo-hydrographic forcing Buttay, L. (Lucie) Cazelles, B. (Bernard) González-Quirós, R. (Rafael) Miranda, A. (Ana) Nogueira, E. (Enrique) Atlantic Ocean Central Atlantic Eastern Central Atlantic Northwest Spanish 2014-09-18 http://hdl.handle.net/10508/2185 eng eng Centro Oceanográfico de Vigo http://hdl.handle.net/10508/2185 IMBER. (23/06/2014 - 27/06/2014. Bergen, Norway). . -. En: , . Atribución-NoComercial-SinDerivadas 3.0 España http://creativecommons.org/licenses/by-nc-nd/3.0/es/ restrictedAccess CC-BY-NC-ND Zooplankton time-series wavelets synchronicity Iberian shelf conferenceObject 2014 ftieo 2022-07-26T23:47:12Z We have investigated zooplankton temporal dynamics in the northwest Iberian shelf, a temperate ecosystem subject to coastal upwelling-donnwelling processes. To this aim, we have applied wavelet analysis, a methodology able to cope with non-stationary dynamics, to monthly time series of zooplankton abundance and biomass acquired between 1995 and 2011 at two locations over the shelf and to environmental variables known to affect functioning of this ecosystem (wind regime, Ekam transport and river outflows). The seasonal signal of total zooplankton abundance and of the main taxonomic groups showed an abrupt increase in amplitude around 2001 that persisted until the end of the series in 2011. Concurrent with the change in amplitude, there was a synchronization of the seasonal cycle of abundance among taxonomics groups (e.g. copepods, larvaceans, chaetognats.) and copepod species, which persisted for several years although it decreased at the end of the series. Between 2001 and 2004, significant changes in wind regime patterns, linked to variability of the North Atlantic Oscillation, were observed: westerly winds became predominant, river outflow increased and offshore Ekman transport decreased. This meteo-climatic configuration favors retention mechanisms over across-shelf exchage processes due to the reinforcement of the western Iberian buoyant plume (WIBP) and the prevalence of downwelling. We hypothesized that the observed changes in zooplankton dynamics are governed by the amplification of the seasonal signal of these environmental drivers causing enhancement of the retention phenomena. Conference Object North Atlantic North Atlantic oscillation Copepods Instituto Español de Oceanografía: e-IEO |
institution |
Open Polar |
collection |
Instituto Español de Oceanografía: e-IEO |
op_collection_id |
ftieo |
language |
English |
topic |
Zooplankton time-series wavelets synchronicity Iberian shelf |
spellingShingle |
Zooplankton time-series wavelets synchronicity Iberian shelf Buttay, L. (Lucie) Cazelles, B. (Bernard) González-Quirós, R. (Rafael) Miranda, A. (Ana) Nogueira, E. (Enrique) Shift in seasonal amplitude and synchronicity of zooplankton in the northwest Iberian shelf driven by meteo-hydrographic forcing |
topic_facet |
Zooplankton time-series wavelets synchronicity Iberian shelf |
description |
We have investigated zooplankton temporal dynamics in the northwest Iberian shelf, a temperate ecosystem subject to coastal upwelling-donnwelling processes. To this aim, we have applied wavelet analysis, a methodology able to cope with non-stationary dynamics, to monthly time series of zooplankton abundance and biomass acquired between 1995 and 2011 at two locations over the shelf and to environmental variables known to affect functioning of this ecosystem (wind regime, Ekam transport and river outflows). The seasonal signal of total zooplankton abundance and of the main taxonomic groups showed an abrupt increase in amplitude around 2001 that persisted until the end of the series in 2011. Concurrent with the change in amplitude, there was a synchronization of the seasonal cycle of abundance among taxonomics groups (e.g. copepods, larvaceans, chaetognats.) and copepod species, which persisted for several years although it decreased at the end of the series. Between 2001 and 2004, significant changes in wind regime patterns, linked to variability of the North Atlantic Oscillation, were observed: westerly winds became predominant, river outflow increased and offshore Ekman transport decreased. This meteo-climatic configuration favors retention mechanisms over across-shelf exchage processes due to the reinforcement of the western Iberian buoyant plume (WIBP) and the prevalence of downwelling. We hypothesized that the observed changes in zooplankton dynamics are governed by the amplification of the seasonal signal of these environmental drivers causing enhancement of the retention phenomena. |
format |
Conference Object |
author |
Buttay, L. (Lucie) Cazelles, B. (Bernard) González-Quirós, R. (Rafael) Miranda, A. (Ana) Nogueira, E. (Enrique) |
author_facet |
Buttay, L. (Lucie) Cazelles, B. (Bernard) González-Quirós, R. (Rafael) Miranda, A. (Ana) Nogueira, E. (Enrique) |
author_sort |
Buttay, L. (Lucie) |
title |
Shift in seasonal amplitude and synchronicity of zooplankton in the northwest Iberian shelf driven by meteo-hydrographic forcing |
title_short |
Shift in seasonal amplitude and synchronicity of zooplankton in the northwest Iberian shelf driven by meteo-hydrographic forcing |
title_full |
Shift in seasonal amplitude and synchronicity of zooplankton in the northwest Iberian shelf driven by meteo-hydrographic forcing |
title_fullStr |
Shift in seasonal amplitude and synchronicity of zooplankton in the northwest Iberian shelf driven by meteo-hydrographic forcing |
title_full_unstemmed |
Shift in seasonal amplitude and synchronicity of zooplankton in the northwest Iberian shelf driven by meteo-hydrographic forcing |
title_sort |
shift in seasonal amplitude and synchronicity of zooplankton in the northwest iberian shelf driven by meteo-hydrographic forcing |
publisher |
Centro Oceanográfico de Vigo |
publishDate |
2014 |
url |
http://hdl.handle.net/10508/2185 |
op_coverage |
Atlantic Ocean Central Atlantic Eastern Central Atlantic Northwest Spanish |
genre |
North Atlantic North Atlantic oscillation Copepods |
genre_facet |
North Atlantic North Atlantic oscillation Copepods |
op_relation |
http://hdl.handle.net/10508/2185 IMBER. (23/06/2014 - 27/06/2014. Bergen, Norway). . -. En: , . |
op_rights |
Atribución-NoComercial-SinDerivadas 3.0 España http://creativecommons.org/licenses/by-nc-nd/3.0/es/ restrictedAccess |
op_rightsnorm |
CC-BY-NC-ND |
_version_ |
1766133719030038528 |