Spring phenology shapes the spatial foraging behavior of Antarctic petrels
In polar seas, the seasonal melting of ice triggers the development of an open-water ecosystem characterized by short-lived algal blooms, the grazing and development of zooplankton, and the influx of avian and mammalian predators. Spatial heterogeneity in the timing of ice melt generates temporal va...
Published in: | Marine Ecology Progress Series |
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Online Access: | https://scholar.uwindsor.ca/ibiopub/57 https://doi.org/10.3354/meps12082 https://scholar.uwindsor.ca/context/ibiopub/article/1056/viewcontent/m568p203.pdf |
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ftunivwindsor:oai:scholar.uwindsor.ca:ibiopub-1056 2023-06-11T04:06:56+02:00 Spring phenology shapes the spatial foraging behavior of Antarctic petrels Fauchald, Per Tarroux, Arnaud Tveraa, Torkild Cherel, Yves Ropert-Coudert, Yan Kato, Akiko Love, Oliver P. Varpe, ∅ystein Descamps, Sébastien 2017-03-24T07:00:00Z application/pdf https://scholar.uwindsor.ca/ibiopub/57 https://doi.org/10.3354/meps12082 https://scholar.uwindsor.ca/context/ibiopub/article/1056/viewcontent/m568p203.pdf unknown Scholarship at UWindsor https://scholar.uwindsor.ca/ibiopub/57 doi:10.3354/meps12082 https://scholar.uwindsor.ca/context/ibiopub/article/1056/viewcontent/m568p203.pdf Integrative Biology Publications Area-restricted search Euphausia superba Marginal ice zone Phytoplankton biomass Procellariiformes Sea ice dynamics Southern Ocean Thalassoica antarctica Integrative Biology text 2017 ftunivwindsor https://doi.org/10.3354/meps12082 2023-05-06T19:11:20Z In polar seas, the seasonal melting of ice triggers the development of an open-water ecosystem characterized by short-lived algal blooms, the grazing and development of zooplankton, and the influx of avian and mammalian predators. Spatial heterogeneity in the timing of ice melt generates temporal variability in the development of these events across the habitat, offering a natural framework to assess how foraging marine predators respond to the spring phenology. We combined 4 yr of tracking data of Antarctic petrels Thalassoica antarctica with synoptic remote-sensing data on sea ice and chlorophyll a to test how the development of melting ice and primary production drive Antarctic petrel foraging. Cross-correlation analyses of first-passage time revealed that Antarctic petrels utilized foraging areas with a spatial scale of 300 km. These areas changed position or disappeared within 10 to 30 d and showed no spatial consistency among years. Generalized additive model (GAM) analyses suggested that the presence of foraging areas was related to the time since ice melt. Antarctic petrels concentrated their search effort in melting areas and in areas that had reached an age of 50 to 60 d from the date of ice melt. We found no significant relationship between search effort and chlorophyll a concentration. We suggest that these foraging patterns were related to the vertical distribution and profitability of the main prey, the Antarctic krill Euphausia superba. Our study demonstrates that the annual ice melt in the Southern Ocean shapes the development of a highly patchy and elusive food web, underscoring the importance of flexible foraging strategies among top predators. Text Antarc* Antarctic Antarctic Krill Antarctic Petrel Antarctica Euphausia superba Sea ice Southern Ocean Thalassoica antarctica University of Windsor, Ontario: Scholarship at UWindsor Antarctic Southern Ocean The Antarctic Gam ENVELOPE(-57.955,-57.955,-61.923,-61.923) Marine Ecology Progress Series 568 203 215 |
institution |
Open Polar |
collection |
University of Windsor, Ontario: Scholarship at UWindsor |
op_collection_id |
ftunivwindsor |
language |
unknown |
topic |
Area-restricted search Euphausia superba Marginal ice zone Phytoplankton biomass Procellariiformes Sea ice dynamics Southern Ocean Thalassoica antarctica Integrative Biology |
spellingShingle |
Area-restricted search Euphausia superba Marginal ice zone Phytoplankton biomass Procellariiformes Sea ice dynamics Southern Ocean Thalassoica antarctica Integrative Biology Fauchald, Per Tarroux, Arnaud Tveraa, Torkild Cherel, Yves Ropert-Coudert, Yan Kato, Akiko Love, Oliver P. Varpe, ∅ystein Descamps, Sébastien Spring phenology shapes the spatial foraging behavior of Antarctic petrels |
topic_facet |
Area-restricted search Euphausia superba Marginal ice zone Phytoplankton biomass Procellariiformes Sea ice dynamics Southern Ocean Thalassoica antarctica Integrative Biology |
description |
In polar seas, the seasonal melting of ice triggers the development of an open-water ecosystem characterized by short-lived algal blooms, the grazing and development of zooplankton, and the influx of avian and mammalian predators. Spatial heterogeneity in the timing of ice melt generates temporal variability in the development of these events across the habitat, offering a natural framework to assess how foraging marine predators respond to the spring phenology. We combined 4 yr of tracking data of Antarctic petrels Thalassoica antarctica with synoptic remote-sensing data on sea ice and chlorophyll a to test how the development of melting ice and primary production drive Antarctic petrel foraging. Cross-correlation analyses of first-passage time revealed that Antarctic petrels utilized foraging areas with a spatial scale of 300 km. These areas changed position or disappeared within 10 to 30 d and showed no spatial consistency among years. Generalized additive model (GAM) analyses suggested that the presence of foraging areas was related to the time since ice melt. Antarctic petrels concentrated their search effort in melting areas and in areas that had reached an age of 50 to 60 d from the date of ice melt. We found no significant relationship between search effort and chlorophyll a concentration. We suggest that these foraging patterns were related to the vertical distribution and profitability of the main prey, the Antarctic krill Euphausia superba. Our study demonstrates that the annual ice melt in the Southern Ocean shapes the development of a highly patchy and elusive food web, underscoring the importance of flexible foraging strategies among top predators. |
format |
Text |
author |
Fauchald, Per Tarroux, Arnaud Tveraa, Torkild Cherel, Yves Ropert-Coudert, Yan Kato, Akiko Love, Oliver P. Varpe, ∅ystein Descamps, Sébastien |
author_facet |
Fauchald, Per Tarroux, Arnaud Tveraa, Torkild Cherel, Yves Ropert-Coudert, Yan Kato, Akiko Love, Oliver P. Varpe, ∅ystein Descamps, Sébastien |
author_sort |
Fauchald, Per |
title |
Spring phenology shapes the spatial foraging behavior of Antarctic petrels |
title_short |
Spring phenology shapes the spatial foraging behavior of Antarctic petrels |
title_full |
Spring phenology shapes the spatial foraging behavior of Antarctic petrels |
title_fullStr |
Spring phenology shapes the spatial foraging behavior of Antarctic petrels |
title_full_unstemmed |
Spring phenology shapes the spatial foraging behavior of Antarctic petrels |
title_sort |
spring phenology shapes the spatial foraging behavior of antarctic petrels |
publisher |
Scholarship at UWindsor |
publishDate |
2017 |
url |
https://scholar.uwindsor.ca/ibiopub/57 https://doi.org/10.3354/meps12082 https://scholar.uwindsor.ca/context/ibiopub/article/1056/viewcontent/m568p203.pdf |
long_lat |
ENVELOPE(-57.955,-57.955,-61.923,-61.923) |
geographic |
Antarctic Southern Ocean The Antarctic Gam |
geographic_facet |
Antarctic Southern Ocean The Antarctic Gam |
genre |
Antarc* Antarctic Antarctic Krill Antarctic Petrel Antarctica Euphausia superba Sea ice Southern Ocean Thalassoica antarctica |
genre_facet |
Antarc* Antarctic Antarctic Krill Antarctic Petrel Antarctica Euphausia superba Sea ice Southern Ocean Thalassoica antarctica |
op_source |
Integrative Biology Publications |
op_relation |
https://scholar.uwindsor.ca/ibiopub/57 doi:10.3354/meps12082 https://scholar.uwindsor.ca/context/ibiopub/article/1056/viewcontent/m568p203.pdf |
op_doi |
https://doi.org/10.3354/meps12082 |
container_title |
Marine Ecology Progress Series |
container_volume |
568 |
container_start_page |
203 |
op_container_end_page |
215 |
_version_ |
1768379192319148032 |