Effects of inter-annual freshwater inflow shifts on the community structure of estuarine decapods
The objective of this study was to evaluate how inter-annual changes in freshwater inputs have affected the decapod assemblages in the Guadiana estuary. Three major areas in the estuary were sampled during the summer, in 2001 (high inflow year and before the filling of the Alqueva dam), in 2002 (low...
Main Authors: | , , , , , , |
---|---|
Format: | Text |
Language: | unknown |
Published: |
Station Biologique de Roscoff (SBR)
2013
|
Subjects: | |
Online Access: | https://dx.doi.org/10.21411/cbm.a.782baab8 http://application.sb-roscoff.fr/cbm/doi/10.21411/CBM.A.782BAAB8 |
id |
ftdatacite:10.21411/cbm.a.782baab8 |
---|---|
record_format |
openpolar |
spelling |
ftdatacite:10.21411/cbm.a.782baab8 2023-05-15T17:34:13+02:00 Effects of inter-annual freshwater inflow shifts on the community structure of estuarine decapods ENCARNAÇÃO, João LEITÃO, Tânia MORAIS, Pedro PILÓ, David RANGE, Pedro CHÍCHARO, Luis CHÍCHARO, Maria A. 2013 https://dx.doi.org/10.21411/cbm.a.782baab8 http://application.sb-roscoff.fr/cbm/doi/10.21411/CBM.A.782BAAB8 unknown Station Biologique de Roscoff (SBR) https://dx.doi.org/10.21411/cbm.i.b019cebd Text Article article-journal ScholarlyArticle 2013 ftdatacite https://doi.org/10.21411/cbm.a.782baab8 https://doi.org/10.21411/cbm.i.b019cebd 2021-11-05T12:55:41Z The objective of this study was to evaluate how inter-annual changes in freshwater inputs have affected the decapod assemblages in the Guadiana estuary. Three major areas in the estuary were sampled during the summer, in 2001 (high inflow year and before the filling of the Alqueva dam), in 2002 (low inflow and after filling of the Alqueva dam), and in 2008 and 2009 (low inflow and after consolidation of the impacts of the Alqueva dam). A significant increase in total decapod densities was recorded for the entire estuary, but especially in the upper estuary, after the closure of the dam in 2002. Changes in salinity, turbidity and temperature, which were mainly due to changes in freshwater input and climatic influence (North Atlantic Oscillation index), had an important influence on the structure of the decapod crustacean assemblages. The major conclusions of the study were that, following the construction of the Alqueva dam and regularization of the freshwater inflow, the decapod crustacean community in the Guadiana estuary changed and a shift of the dominant decapod species to upper zones of the estuary happened. These changes, and the presence of the non-native Palaemon macrodactylus in 2008 and 2009, further enhance the importance of estuarine monitoring studies to improve ecologists' knowledge on distinguishing and understanding natural changes and anthropogenic impacts in the ecosystem. Text North Atlantic North Atlantic oscillation DataCite Metadata Store (German National Library of Science and Technology) |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
unknown |
description |
The objective of this study was to evaluate how inter-annual changes in freshwater inputs have affected the decapod assemblages in the Guadiana estuary. Three major areas in the estuary were sampled during the summer, in 2001 (high inflow year and before the filling of the Alqueva dam), in 2002 (low inflow and after filling of the Alqueva dam), and in 2008 and 2009 (low inflow and after consolidation of the impacts of the Alqueva dam). A significant increase in total decapod densities was recorded for the entire estuary, but especially in the upper estuary, after the closure of the dam in 2002. Changes in salinity, turbidity and temperature, which were mainly due to changes in freshwater input and climatic influence (North Atlantic Oscillation index), had an important influence on the structure of the decapod crustacean assemblages. The major conclusions of the study were that, following the construction of the Alqueva dam and regularization of the freshwater inflow, the decapod crustacean community in the Guadiana estuary changed and a shift of the dominant decapod species to upper zones of the estuary happened. These changes, and the presence of the non-native Palaemon macrodactylus in 2008 and 2009, further enhance the importance of estuarine monitoring studies to improve ecologists' knowledge on distinguishing and understanding natural changes and anthropogenic impacts in the ecosystem. |
format |
Text |
author |
ENCARNAÇÃO, João LEITÃO, Tânia MORAIS, Pedro PILÓ, David RANGE, Pedro CHÍCHARO, Luis CHÍCHARO, Maria A. |
spellingShingle |
ENCARNAÇÃO, João LEITÃO, Tânia MORAIS, Pedro PILÓ, David RANGE, Pedro CHÍCHARO, Luis CHÍCHARO, Maria A. Effects of inter-annual freshwater inflow shifts on the community structure of estuarine decapods |
author_facet |
ENCARNAÇÃO, João LEITÃO, Tânia MORAIS, Pedro PILÓ, David RANGE, Pedro CHÍCHARO, Luis CHÍCHARO, Maria A. |
author_sort |
ENCARNAÇÃO, João |
title |
Effects of inter-annual freshwater inflow shifts on the community structure of estuarine decapods |
title_short |
Effects of inter-annual freshwater inflow shifts on the community structure of estuarine decapods |
title_full |
Effects of inter-annual freshwater inflow shifts on the community structure of estuarine decapods |
title_fullStr |
Effects of inter-annual freshwater inflow shifts on the community structure of estuarine decapods |
title_full_unstemmed |
Effects of inter-annual freshwater inflow shifts on the community structure of estuarine decapods |
title_sort |
effects of inter-annual freshwater inflow shifts on the community structure of estuarine decapods |
publisher |
Station Biologique de Roscoff (SBR) |
publishDate |
2013 |
url |
https://dx.doi.org/10.21411/cbm.a.782baab8 http://application.sb-roscoff.fr/cbm/doi/10.21411/CBM.A.782BAAB8 |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_relation |
https://dx.doi.org/10.21411/cbm.i.b019cebd |
op_doi |
https://doi.org/10.21411/cbm.a.782baab8 https://doi.org/10.21411/cbm.i.b019cebd |
_version_ |
1766132983299833856 |