Year-round distribution suggests spatial segregation of two small petrel species in the South Atlantic
12 pages, 4 figures, 2 tables Aim Pelagic seabirds exploit large areas of ocean when acting as central-place foragers during the breeding season, and ranges are even more extensive outside the breeding period. Spatial niche partitioning is known to occur among species that breed sympatrically, but i...
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Language: | English |
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2013
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Online Access: | http://hdl.handle.net/10261/71813 https://doi.org/10.1111/jbi.12008 |
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ftcsic:oai:digital.csic.es:10261/71813 2024-02-11T09:57:32+01:00 Year-round distribution suggests spatial segregation of two small petrel species in the South Atlantic Quillfeldt, Petra Masello, Juan F. Navarro, Joan Phillips, Richard A. 2013-03 http://hdl.handle.net/10261/71813 https://doi.org/10.1111/jbi.12008 en eng Blackwell Publishing https://doi.org/10.1111/jbi.12008 Journal of Biogeography 40(3): 430-441 (2012) 0305-0270 http://hdl.handle.net/10261/71813 doi:10.1111/jbi.12008 1365-2699 none Ecological segregation Habitat modelling Migratory behaviour Non-breeding ecology Pachyptila belcheri Pachyptila desolata Procellariiformes Resource partitioning Spatial overlap South Atlantic Ocean artículo http://purl.org/coar/resource_type/c_6501 2013 ftcsic https://doi.org/10.1111/jbi.12008 2024-01-16T09:47:26Z 12 pages, 4 figures, 2 tables Aim Pelagic seabirds exploit large areas of ocean when acting as central-place foragers during the breeding season, and ranges are even more extensive outside the breeding period. Spatial niche partitioning is known to occur among species that breed sympatrically, but is less apparent during the non-breeding period when there is increased potential for overlap among closely related species from neighbouring island groups. This applies to several species of prion, Pachyptila spp., in the Southern Ocean; although extremely abundant, their at-sea distribution was virtually unknown because they are difficult to distinguish while at sea. To understand spatial niche partitioning at large scales, we investigated the year-round distribution of thin-billed prions (Pachyptila belcheri) from the Falkland Islands (Islas Malvinas) and Antarctic prions (Pachyptila desolata) from South Georgia. Location South Atlantic Ocean. Methods Recently, geolocation devices have become small enough to be deployed on small seabirds. During 2009–10, we tracked 20 thin-billed prions and 9 Antarctic prions with miniaturized geolocators. We applied ecological niche models to compare environmental conditions in the habitat utilized year-round. Results We show that two prion species from the south-west Atlantic Ocean have divergent patterns of migration, and that this has resulted in nearly complete spatial segregation (0–5% overlap by month in the 95% kernel density polygons). Nineteen of 20 thin-billed prions migrated to an area > 3000 km east of their breeding site, whereas all Antarctic prions migrated a much shorter distance, and to the north-west. The non-breeding distribution of thin-billed prions included the waters around South Georgia, but only when the Antarctic prions were absent. The models highlighted large differences in the realized niche between the two species, and between the habitat characteristics of breeding and non-breeding areas of thin-billed and Antarctic prions. Main conclusions Our ... Article in Journal/Newspaper Antarc* Antarctic Pachyptila desolata South Atlantic Ocean Southern Ocean Digital.CSIC (Spanish National Research Council) Antarctic Southern Ocean The Antarctic Journal of Biogeography 40 3 430 441 |
institution |
Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
English |
topic |
Ecological segregation Habitat modelling Migratory behaviour Non-breeding ecology Pachyptila belcheri Pachyptila desolata Procellariiformes Resource partitioning Spatial overlap South Atlantic Ocean |
spellingShingle |
Ecological segregation Habitat modelling Migratory behaviour Non-breeding ecology Pachyptila belcheri Pachyptila desolata Procellariiformes Resource partitioning Spatial overlap South Atlantic Ocean Quillfeldt, Petra Masello, Juan F. Navarro, Joan Phillips, Richard A. Year-round distribution suggests spatial segregation of two small petrel species in the South Atlantic |
topic_facet |
Ecological segregation Habitat modelling Migratory behaviour Non-breeding ecology Pachyptila belcheri Pachyptila desolata Procellariiformes Resource partitioning Spatial overlap South Atlantic Ocean |
description |
12 pages, 4 figures, 2 tables Aim Pelagic seabirds exploit large areas of ocean when acting as central-place foragers during the breeding season, and ranges are even more extensive outside the breeding period. Spatial niche partitioning is known to occur among species that breed sympatrically, but is less apparent during the non-breeding period when there is increased potential for overlap among closely related species from neighbouring island groups. This applies to several species of prion, Pachyptila spp., in the Southern Ocean; although extremely abundant, their at-sea distribution was virtually unknown because they are difficult to distinguish while at sea. To understand spatial niche partitioning at large scales, we investigated the year-round distribution of thin-billed prions (Pachyptila belcheri) from the Falkland Islands (Islas Malvinas) and Antarctic prions (Pachyptila desolata) from South Georgia. Location South Atlantic Ocean. Methods Recently, geolocation devices have become small enough to be deployed on small seabirds. During 2009–10, we tracked 20 thin-billed prions and 9 Antarctic prions with miniaturized geolocators. We applied ecological niche models to compare environmental conditions in the habitat utilized year-round. Results We show that two prion species from the south-west Atlantic Ocean have divergent patterns of migration, and that this has resulted in nearly complete spatial segregation (0–5% overlap by month in the 95% kernel density polygons). Nineteen of 20 thin-billed prions migrated to an area > 3000 km east of their breeding site, whereas all Antarctic prions migrated a much shorter distance, and to the north-west. The non-breeding distribution of thin-billed prions included the waters around South Georgia, but only when the Antarctic prions were absent. The models highlighted large differences in the realized niche between the two species, and between the habitat characteristics of breeding and non-breeding areas of thin-billed and Antarctic prions. Main conclusions Our ... |
format |
Article in Journal/Newspaper |
author |
Quillfeldt, Petra Masello, Juan F. Navarro, Joan Phillips, Richard A. |
author_facet |
Quillfeldt, Petra Masello, Juan F. Navarro, Joan Phillips, Richard A. |
author_sort |
Quillfeldt, Petra |
title |
Year-round distribution suggests spatial segregation of two small petrel species in the South Atlantic |
title_short |
Year-round distribution suggests spatial segregation of two small petrel species in the South Atlantic |
title_full |
Year-round distribution suggests spatial segregation of two small petrel species in the South Atlantic |
title_fullStr |
Year-round distribution suggests spatial segregation of two small petrel species in the South Atlantic |
title_full_unstemmed |
Year-round distribution suggests spatial segregation of two small petrel species in the South Atlantic |
title_sort |
year-round distribution suggests spatial segregation of two small petrel species in the south atlantic |
publisher |
Blackwell Publishing |
publishDate |
2013 |
url |
http://hdl.handle.net/10261/71813 https://doi.org/10.1111/jbi.12008 |
geographic |
Antarctic Southern Ocean The Antarctic |
geographic_facet |
Antarctic Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Pachyptila desolata South Atlantic Ocean Southern Ocean |
genre_facet |
Antarc* Antarctic Pachyptila desolata South Atlantic Ocean Southern Ocean |
op_relation |
https://doi.org/10.1111/jbi.12008 Journal of Biogeography 40(3): 430-441 (2012) 0305-0270 http://hdl.handle.net/10261/71813 doi:10.1111/jbi.12008 1365-2699 |
op_rights |
none |
op_doi |
https://doi.org/10.1111/jbi.12008 |
container_title |
Journal of Biogeography |
container_volume |
40 |
container_issue |
3 |
container_start_page |
430 |
op_container_end_page |
441 |
_version_ |
1790593076118421504 |