Ocean control of the breeding regime of the sooty tern in the southwest Indian Ocean
International audience Food availability, which is often seasonal, is regarded as a key factor in the breeding success of seabirds. In oceanic tropical areas, the resources are mostly patchy and ephemeral at the surface, and the seasonality is less marked than at higher latitudes. Such a situation i...
Published in: | Deep Sea Research Part I: Oceanographic Research Papers |
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Format: | Article in Journal/Newspaper |
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Online Access: | https://hal.univ-reunion.fr/hal-01367532 https://hal.univ-reunion.fr/hal-01367532/document https://hal.univ-reunion.fr/hal-01367532/file/Ocean_control_of_the_breeding_regime_of_the_sooty_tern.pdf https://doi.org/10.1016/j.dsr.2006.10.003 |
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ftccsdartic:oai:HAL:hal-01367532v1 2023-05-15T15:44:45+02:00 Ocean control of the breeding regime of the sooty tern in the southwest Indian Ocean Jaquemet, Sébastien Le Corre, Matthieu Quartly, G.D. Laboratoire d'Ecologie Marine (ECOMAR) Université de La Réunion (UR) National Oceanography Centre Southampton (NOC) University of Southampton 2007-01 https://hal.univ-reunion.fr/hal-01367532 https://hal.univ-reunion.fr/hal-01367532/document https://hal.univ-reunion.fr/hal-01367532/file/Ocean_control_of_the_breeding_regime_of_the_sooty_tern.pdf https://doi.org/10.1016/j.dsr.2006.10.003 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.dsr.2006.10.003 hal-01367532 https://hal.univ-reunion.fr/hal-01367532 https://hal.univ-reunion.fr/hal-01367532/document https://hal.univ-reunion.fr/hal-01367532/file/Ocean_control_of_the_breeding_regime_of_the_sooty_tern.pdf doi:10.1016/j.dsr.2006.10.003 info:eu-repo/semantics/OpenAccess ISSN: 0967-0637 Deep Sea Research Part I: Oceanographic Research Papers https://hal.univ-reunion.fr/hal-01367532 Deep Sea Research Part I: Oceanographic Research Papers, Elsevier, 2007, 54 (1), pp.130-142. ⟨10.1016/j.dsr.2006.10.003⟩ southwest Indian Ocean Seychelles Archipelago Chlorophyll Mozambique Channel SST Seabirds Sterna fuscata Breeding phenology [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDE.MCG]Environmental Sciences/Global Changes [SDV.EE.ECO]Life Sciences [q-bio]/Ecology environment/Ecosystems info:eu-repo/semantics/article Journal articles 2007 ftccsdartic https://doi.org/10.1016/j.dsr.2006.10.003 2021-10-24T06:29:11Z International audience Food availability, which is often seasonal, is regarded as a key factor in the breeding success of seabirds. In oceanic tropical areas, the resources are mostly patchy and ephemeral at the surface, and the seasonality is less marked than at higher latitudes. Such a situation influences greatly the breeding strategies of the oceanic seabird species. We conducted a comparative study of the breeding phenology of the sooty tern (Sterna fuscata) in relation to the local and regional oceanographic conditions around the four major colonies (Europa, Juan de Nova, Lys and Bird Islands) of the southwest Indian Ocean. Over the 1997–2003 period, around all the studied locations, the sea-surface temperature (SST) and the chlorophyll concentration in the Mozambique Channel and the Seychelles area showed clear seasonal differences related to the southern climate and the monsoon phenomena. The breeding activity is synchronized at each studied colony, but the timings are very different. Seasonal reproduction occurs in austral winter at Europa and Bird Island and in austral summer at Juan de Nova; at Lys Island the reproduction is non-seasonal. For the seasonal colonies, there is a large monthly change in SST just before the beginning of reproduction, which is a proxy indicating the annual phytoplankton bloom. This variation is accompanied by the development of oceanic features such as fronts that favour aggregation of prey, and may also play an important role in the presence of schools of surface tuna, which are very important for the foraging success of sooty terns. Conversely, around Lys Island the seasonal variations of the marine environment do not lead to pronounced development of oceanic structures, and consequently, the longer-lasting phytoplankton bloom could explain the non-seasonal breeding regime there. Further studies will help discern the advantages and disadvantages of seasonal and non-seasonal reproduction regime in response to unpredictable fluctuations of the marine environment. Article in Journal/Newspaper Bird Island Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Austral Bird Island ENVELOPE(-38.060,-38.060,-54.004,-54.004) Indian Deep Sea Research Part I: Oceanographic Research Papers 54 1 130 142 |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
southwest Indian Ocean Seychelles Archipelago Chlorophyll Mozambique Channel SST Seabirds Sterna fuscata Breeding phenology [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDE.MCG]Environmental Sciences/Global Changes [SDV.EE.ECO]Life Sciences [q-bio]/Ecology environment/Ecosystems |
spellingShingle |
southwest Indian Ocean Seychelles Archipelago Chlorophyll Mozambique Channel SST Seabirds Sterna fuscata Breeding phenology [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDE.MCG]Environmental Sciences/Global Changes [SDV.EE.ECO]Life Sciences [q-bio]/Ecology environment/Ecosystems Jaquemet, Sébastien Le Corre, Matthieu Quartly, G.D. Ocean control of the breeding regime of the sooty tern in the southwest Indian Ocean |
topic_facet |
southwest Indian Ocean Seychelles Archipelago Chlorophyll Mozambique Channel SST Seabirds Sterna fuscata Breeding phenology [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDE.MCG]Environmental Sciences/Global Changes [SDV.EE.ECO]Life Sciences [q-bio]/Ecology environment/Ecosystems |
description |
International audience Food availability, which is often seasonal, is regarded as a key factor in the breeding success of seabirds. In oceanic tropical areas, the resources are mostly patchy and ephemeral at the surface, and the seasonality is less marked than at higher latitudes. Such a situation influences greatly the breeding strategies of the oceanic seabird species. We conducted a comparative study of the breeding phenology of the sooty tern (Sterna fuscata) in relation to the local and regional oceanographic conditions around the four major colonies (Europa, Juan de Nova, Lys and Bird Islands) of the southwest Indian Ocean. Over the 1997–2003 period, around all the studied locations, the sea-surface temperature (SST) and the chlorophyll concentration in the Mozambique Channel and the Seychelles area showed clear seasonal differences related to the southern climate and the monsoon phenomena. The breeding activity is synchronized at each studied colony, but the timings are very different. Seasonal reproduction occurs in austral winter at Europa and Bird Island and in austral summer at Juan de Nova; at Lys Island the reproduction is non-seasonal. For the seasonal colonies, there is a large monthly change in SST just before the beginning of reproduction, which is a proxy indicating the annual phytoplankton bloom. This variation is accompanied by the development of oceanic features such as fronts that favour aggregation of prey, and may also play an important role in the presence of schools of surface tuna, which are very important for the foraging success of sooty terns. Conversely, around Lys Island the seasonal variations of the marine environment do not lead to pronounced development of oceanic structures, and consequently, the longer-lasting phytoplankton bloom could explain the non-seasonal breeding regime there. Further studies will help discern the advantages and disadvantages of seasonal and non-seasonal reproduction regime in response to unpredictable fluctuations of the marine environment. |
author2 |
Laboratoire d'Ecologie Marine (ECOMAR) Université de La Réunion (UR) National Oceanography Centre Southampton (NOC) University of Southampton |
format |
Article in Journal/Newspaper |
author |
Jaquemet, Sébastien Le Corre, Matthieu Quartly, G.D. |
author_facet |
Jaquemet, Sébastien Le Corre, Matthieu Quartly, G.D. |
author_sort |
Jaquemet, Sébastien |
title |
Ocean control of the breeding regime of the sooty tern in the southwest Indian Ocean |
title_short |
Ocean control of the breeding regime of the sooty tern in the southwest Indian Ocean |
title_full |
Ocean control of the breeding regime of the sooty tern in the southwest Indian Ocean |
title_fullStr |
Ocean control of the breeding regime of the sooty tern in the southwest Indian Ocean |
title_full_unstemmed |
Ocean control of the breeding regime of the sooty tern in the southwest Indian Ocean |
title_sort |
ocean control of the breeding regime of the sooty tern in the southwest indian ocean |
publisher |
HAL CCSD |
publishDate |
2007 |
url |
https://hal.univ-reunion.fr/hal-01367532 https://hal.univ-reunion.fr/hal-01367532/document https://hal.univ-reunion.fr/hal-01367532/file/Ocean_control_of_the_breeding_regime_of_the_sooty_tern.pdf https://doi.org/10.1016/j.dsr.2006.10.003 |
long_lat |
ENVELOPE(-38.060,-38.060,-54.004,-54.004) |
geographic |
Austral Bird Island Indian |
geographic_facet |
Austral Bird Island Indian |
genre |
Bird Island |
genre_facet |
Bird Island |
op_source |
ISSN: 0967-0637 Deep Sea Research Part I: Oceanographic Research Papers https://hal.univ-reunion.fr/hal-01367532 Deep Sea Research Part I: Oceanographic Research Papers, Elsevier, 2007, 54 (1), pp.130-142. ⟨10.1016/j.dsr.2006.10.003⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.dsr.2006.10.003 hal-01367532 https://hal.univ-reunion.fr/hal-01367532 https://hal.univ-reunion.fr/hal-01367532/document https://hal.univ-reunion.fr/hal-01367532/file/Ocean_control_of_the_breeding_regime_of_the_sooty_tern.pdf doi:10.1016/j.dsr.2006.10.003 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1016/j.dsr.2006.10.003 |
container_title |
Deep Sea Research Part I: Oceanographic Research Papers |
container_volume |
54 |
container_issue |
1 |
container_start_page |
130 |
op_container_end_page |
142 |
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