Temporal change in the contribution of immigration to population growth in a wild seabird experiencing rapid population decline
The source–sink paradigm predicts that populations in poorer-quality habitats (‘sinks') persist due to continued immigration from more-productive areas (‘sources'). However, this categorisation of populations assumes that habitat quality is fixed through time. Globally, we are in an era of...
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Online Access: | https://discovery.ucl.ac.uk/id/eprint/10156763/1/Ecography%20-%202022%20-%20Horswill%20-%20Temporal%20change%20in%20the%20contribution%20of%20immigration%20to%20population%20growth%20in%20a%20wild%20seabird.pdf https://discovery.ucl.ac.uk/id/eprint/10156763/ |
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ftucl:oai:eprints.ucl.ac.uk.OAI2:10156763 2023-12-24T10:15:34+01:00 Temporal change in the contribution of immigration to population growth in a wild seabird experiencing rapid population decline Horswill, Catharine 2022-10-04 text https://discovery.ucl.ac.uk/id/eprint/10156763/1/Ecography%20-%202022%20-%20Horswill%20-%20Temporal%20change%20in%20the%20contribution%20of%20immigration%20to%20population%20growth%20in%20a%20wild%20seabird.pdf https://discovery.ucl.ac.uk/id/eprint/10156763/ eng eng Wiley-Blackwell https://discovery.ucl.ac.uk/id/eprint/10156763/1/Ecography%20-%202022%20-%20Horswill%20-%20Temporal%20change%20in%20the%20contribution%20of%20immigration%20to%20population%20growth%20in%20a%20wild%20seabird.pdf https://discovery.ucl.ac.uk/id/eprint/10156763/ open Ecography: pattern and diversity in ecology , Article e05846. (2022) Demography dispersal integrated population model population dynamics population viability Rissa tridactyla Article 2022 ftucl 2023-11-27T13:07:33Z The source–sink paradigm predicts that populations in poorer-quality habitats (‘sinks') persist due to continued immigration from more-productive areas (‘sources'). However, this categorisation of populations assumes that habitat quality is fixed through time. Globally, we are in an era of wide-spread habitat degradation, and consequently there is a pressing need to examine dispersal dynamics in relation to local population change. We used an integrated population model to quantify immigration dynamics in a long-lived colonial seabird, the black-legged kittiwake Rissa tridactyla, that is classified as globally ‘Vulnerable'. We then used a transient life table response experiment to evaluate the contribution of temporal variation in vital rates, immigration rates and population structure to realised population growth. Finally, we used a simulation analysis to examine the importance of immigration to population dynamics. We show that the contribution of immigration changed as the population declined. This study demonstrates that immigration is unlikely to maintain vulnerable sink populations indefinitely, emphasising the need for temporal analyses of dispersal to identify shifts that may have dramatic consequences for population viability. Article in Journal/Newspaper Black-legged Kittiwake rissa tridactyla University College London: UCL Discovery |
institution |
Open Polar |
collection |
University College London: UCL Discovery |
op_collection_id |
ftucl |
language |
English |
topic |
Demography dispersal integrated population model population dynamics population viability Rissa tridactyla |
spellingShingle |
Demography dispersal integrated population model population dynamics population viability Rissa tridactyla Horswill, Catharine Temporal change in the contribution of immigration to population growth in a wild seabird experiencing rapid population decline |
topic_facet |
Demography dispersal integrated population model population dynamics population viability Rissa tridactyla |
description |
The source–sink paradigm predicts that populations in poorer-quality habitats (‘sinks') persist due to continued immigration from more-productive areas (‘sources'). However, this categorisation of populations assumes that habitat quality is fixed through time. Globally, we are in an era of wide-spread habitat degradation, and consequently there is a pressing need to examine dispersal dynamics in relation to local population change. We used an integrated population model to quantify immigration dynamics in a long-lived colonial seabird, the black-legged kittiwake Rissa tridactyla, that is classified as globally ‘Vulnerable'. We then used a transient life table response experiment to evaluate the contribution of temporal variation in vital rates, immigration rates and population structure to realised population growth. Finally, we used a simulation analysis to examine the importance of immigration to population dynamics. We show that the contribution of immigration changed as the population declined. This study demonstrates that immigration is unlikely to maintain vulnerable sink populations indefinitely, emphasising the need for temporal analyses of dispersal to identify shifts that may have dramatic consequences for population viability. |
format |
Article in Journal/Newspaper |
author |
Horswill, Catharine |
author_facet |
Horswill, Catharine |
author_sort |
Horswill, Catharine |
title |
Temporal change in the contribution of immigration to population growth in a wild seabird experiencing rapid population decline |
title_short |
Temporal change in the contribution of immigration to population growth in a wild seabird experiencing rapid population decline |
title_full |
Temporal change in the contribution of immigration to population growth in a wild seabird experiencing rapid population decline |
title_fullStr |
Temporal change in the contribution of immigration to population growth in a wild seabird experiencing rapid population decline |
title_full_unstemmed |
Temporal change in the contribution of immigration to population growth in a wild seabird experiencing rapid population decline |
title_sort |
temporal change in the contribution of immigration to population growth in a wild seabird experiencing rapid population decline |
publisher |
Wiley-Blackwell |
publishDate |
2022 |
url |
https://discovery.ucl.ac.uk/id/eprint/10156763/1/Ecography%20-%202022%20-%20Horswill%20-%20Temporal%20change%20in%20the%20contribution%20of%20immigration%20to%20population%20growth%20in%20a%20wild%20seabird.pdf https://discovery.ucl.ac.uk/id/eprint/10156763/ |
genre |
Black-legged Kittiwake rissa tridactyla |
genre_facet |
Black-legged Kittiwake rissa tridactyla |
op_source |
Ecography: pattern and diversity in ecology , Article e05846. (2022) |
op_relation |
https://discovery.ucl.ac.uk/id/eprint/10156763/1/Ecography%20-%202022%20-%20Horswill%20-%20Temporal%20change%20in%20the%20contribution%20of%20immigration%20to%20population%20growth%20in%20a%20wild%20seabird.pdf https://discovery.ucl.ac.uk/id/eprint/10156763/ |
op_rights |
open |
_version_ |
1786202533021089792 |