Environmental drivers of temporal succession in recent dinoflagellate cyst assemblages from a coastal site in the North-East Atlantic (Lisbon Bay, Portugal).
Temporal changes in the community structure of recent dinoflagellate cyst assemblages of Lisbon Bay (Iberian upwelling system) were investigated between 2000 and 2005. The assemblages were diverse and characterized by high inter-annual variability, rather than a clear seasonal pattern. In order to i...
Published in: | Marine Micropaleontology |
---|---|
Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2008
|
Subjects: | |
Online Access: | https://curis.ku.dk/portal/da/publications/environmental-drivers-of-temporal-succession-in-recent-dinoflagellate-cyst-assemblages-from-a-coastal-site-in-the-northeast-atlantic-lisbon-bay-portugal(4edb6990-b3f3-11dd-b04f-000ea68e967b).html https://doi.org/10.1016/j.marmicro.2008.01.013 |
id |
ftcopenhagenunip:oai:pure.atira.dk:publications/4edb6990-b3f3-11dd-b04f-000ea68e967b |
---|---|
record_format |
openpolar |
spelling |
ftcopenhagenunip:oai:pure.atira.dk:publications/4edb6990-b3f3-11dd-b04f-000ea68e967b 2024-06-09T07:48:25+00:00 Environmental drivers of temporal succession in recent dinoflagellate cyst assemblages from a coastal site in the North-East Atlantic (Lisbon Bay, Portugal). Ribeiro, Sofia Amorim, Ana 2008 https://curis.ku.dk/portal/da/publications/environmental-drivers-of-temporal-succession-in-recent-dinoflagellate-cyst-assemblages-from-a-coastal-site-in-the-northeast-atlantic-lisbon-bay-portugal(4edb6990-b3f3-11dd-b04f-000ea68e967b).html https://doi.org/10.1016/j.marmicro.2008.01.013 eng eng info:eu-repo/semantics/restrictedAccess Ribeiro , S & Amorim , A 2008 , ' Environmental drivers of temporal succession in recent dinoflagellate cyst assemblages from a coastal site in the North-East Atlantic (Lisbon Bay, Portugal). ' , Marine Micropaleontology , vol. 68 , no. 1-2 , pp. 156-178 . https://doi.org/10.1016/j.marmicro.2008.01.013 article 2008 ftcopenhagenunip https://doi.org/10.1016/j.marmicro.2008.01.013 2024-05-16T11:29:15Z Temporal changes in the community structure of recent dinoflagellate cyst assemblages of Lisbon Bay (Iberian upwelling system) were investigated between 2000 and 2005. The assemblages were diverse and characterized by high inter-annual variability, rather than a clear seasonal pattern. In order to identify the main environmental drivers of community changes, several regional (river runoff, rainfall, upwelling, radiation, daylength) and in situ (sea surface temperature, salinity, bottom and surface chlorophyll a concentration) environmental parameters were tested. Multivariate statistical analysis allowed the identification of water stability as the main environmental gradient influencing the community composition, with river runoff in the preceding rain season and upwelling being the two drivers of stratification and turbulence, respectively. Both these processes can be described as nutrient enrichment processes, but the cyst signal indicates that the two mechanisms select for different functional groups. The main upwelling cyst signal is characterised by the dominance of heterotrophic species (Protoperidinioid species) and presence of the autotrophic chain-forming Gymnodinium catenatum , while the river runoff cyst signal is characterised by dominance of autotrophs forming calcareous cysts, mainly Scrippsiella spp. Lingulodinium polyedrum is suggested to be indicative of upwelling conditions in the region but reflecting an ecological niche different from the more classical heterotrophic assemblage and G. catenatum . Our results reinforce the applicability of dinoflagellate cysts as environmental tracers in the warm-temperate region of the NE Atlantic, and contribute to the development of palaeoenvironmental cyst-based signals. Article in Journal/Newspaper North East Atlantic University of Copenhagen: Research Marine Micropaleontology 68 1-2 156 178 |
institution |
Open Polar |
collection |
University of Copenhagen: Research |
op_collection_id |
ftcopenhagenunip |
language |
English |
description |
Temporal changes in the community structure of recent dinoflagellate cyst assemblages of Lisbon Bay (Iberian upwelling system) were investigated between 2000 and 2005. The assemblages were diverse and characterized by high inter-annual variability, rather than a clear seasonal pattern. In order to identify the main environmental drivers of community changes, several regional (river runoff, rainfall, upwelling, radiation, daylength) and in situ (sea surface temperature, salinity, bottom and surface chlorophyll a concentration) environmental parameters were tested. Multivariate statistical analysis allowed the identification of water stability as the main environmental gradient influencing the community composition, with river runoff in the preceding rain season and upwelling being the two drivers of stratification and turbulence, respectively. Both these processes can be described as nutrient enrichment processes, but the cyst signal indicates that the two mechanisms select for different functional groups. The main upwelling cyst signal is characterised by the dominance of heterotrophic species (Protoperidinioid species) and presence of the autotrophic chain-forming Gymnodinium catenatum , while the river runoff cyst signal is characterised by dominance of autotrophs forming calcareous cysts, mainly Scrippsiella spp. Lingulodinium polyedrum is suggested to be indicative of upwelling conditions in the region but reflecting an ecological niche different from the more classical heterotrophic assemblage and G. catenatum . Our results reinforce the applicability of dinoflagellate cysts as environmental tracers in the warm-temperate region of the NE Atlantic, and contribute to the development of palaeoenvironmental cyst-based signals. |
format |
Article in Journal/Newspaper |
author |
Ribeiro, Sofia Amorim, Ana |
spellingShingle |
Ribeiro, Sofia Amorim, Ana Environmental drivers of temporal succession in recent dinoflagellate cyst assemblages from a coastal site in the North-East Atlantic (Lisbon Bay, Portugal). |
author_facet |
Ribeiro, Sofia Amorim, Ana |
author_sort |
Ribeiro, Sofia |
title |
Environmental drivers of temporal succession in recent dinoflagellate cyst assemblages from a coastal site in the North-East Atlantic (Lisbon Bay, Portugal). |
title_short |
Environmental drivers of temporal succession in recent dinoflagellate cyst assemblages from a coastal site in the North-East Atlantic (Lisbon Bay, Portugal). |
title_full |
Environmental drivers of temporal succession in recent dinoflagellate cyst assemblages from a coastal site in the North-East Atlantic (Lisbon Bay, Portugal). |
title_fullStr |
Environmental drivers of temporal succession in recent dinoflagellate cyst assemblages from a coastal site in the North-East Atlantic (Lisbon Bay, Portugal). |
title_full_unstemmed |
Environmental drivers of temporal succession in recent dinoflagellate cyst assemblages from a coastal site in the North-East Atlantic (Lisbon Bay, Portugal). |
title_sort |
environmental drivers of temporal succession in recent dinoflagellate cyst assemblages from a coastal site in the north-east atlantic (lisbon bay, portugal). |
publishDate |
2008 |
url |
https://curis.ku.dk/portal/da/publications/environmental-drivers-of-temporal-succession-in-recent-dinoflagellate-cyst-assemblages-from-a-coastal-site-in-the-northeast-atlantic-lisbon-bay-portugal(4edb6990-b3f3-11dd-b04f-000ea68e967b).html https://doi.org/10.1016/j.marmicro.2008.01.013 |
genre |
North East Atlantic |
genre_facet |
North East Atlantic |
op_source |
Ribeiro , S & Amorim , A 2008 , ' Environmental drivers of temporal succession in recent dinoflagellate cyst assemblages from a coastal site in the North-East Atlantic (Lisbon Bay, Portugal). ' , Marine Micropaleontology , vol. 68 , no. 1-2 , pp. 156-178 . https://doi.org/10.1016/j.marmicro.2008.01.013 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1016/j.marmicro.2008.01.013 |
container_title |
Marine Micropaleontology |
container_volume |
68 |
container_issue |
1-2 |
container_start_page |
156 |
op_container_end_page |
178 |
_version_ |
1801380128877445120 |