Additive effects of climate and fisheries drive ongoing declines in multiple albatross species
Environmental and anthropogenic factors often drive population declines in top predators, but how their influences may combine remains unclear. Albatrosses are particularly threatened. They breed in fast-changing environments, and their extensive foraging ranges expose them to incidental mortality (...
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ftnerc:oai:nora.nerc.ac.uk:518557 2023-05-15T18:18:39+02:00 Additive effects of climate and fisheries drive ongoing declines in multiple albatross species Pardo, Deborah Forcada, Jaume Wood, Andrew G. Tuck, Geoff N. Ireland, Louise Pradel, Roger Croxall, John P. Phillips, Richard A. 2017-12-12 text http://nora.nerc.ac.uk/id/eprint/518557/ https://nora.nerc.ac.uk/id/eprint/518557/1/Pardo.pdf http://www.pnas.org/content/114/50/E10829.short?rss=1 en eng National Academy of Sciences https://nora.nerc.ac.uk/id/eprint/518557/1/Pardo.pdf Pardo, Deborah; Forcada, Jaume orcid:0000-0002-2115-0150 Wood, Andrew G.; Tuck, Geoff N.; Ireland, Louise orcid:0000-0003-0960-0486 Pradel, Roger; Croxall, John P.; Phillips, Richard A. 2017 Additive effects of climate and fisheries drive ongoing declines in multiple albatross species. Proceedings of the National Academy of Sciences, 114 (50). E10829-E10837. https://doi.org/10.1073/pnas.1618819114 <https://doi.org/10.1073/pnas.1618819114> Publication - Article PeerReviewed 2017 ftnerc https://doi.org/10.1073/pnas.1618819114 2023-02-04T19:45:42Z Environmental and anthropogenic factors often drive population declines in top predators, but how their influences may combine remains unclear. Albatrosses are particularly threatened. They breed in fast-changing environments, and their extensive foraging ranges expose them to incidental mortality (bycatch) in multiple fisheries. The albatross community at South Georgia includes globally important populations of three species that have declined by 40–60% over the last 35 years. We used three steps to deeply understand the drivers of such dramatic changes: (i) describe fundamental demographic rates using multievent models, (ii) determine demographic drivers of population growth using matrix models, and (iii) identify environmental and anthropogenic drivers using ANOVAs. Each species was affected by different processes and threats in their foraging areas during the breeding and nonbreeding seasons. There was evidence for two kinds of combined environmental and anthropogenic effects. The first was sequential; in wandering and black-browed albatrosses, high levels of bycatch have reduced juvenile and adult survival, then increased temperature, reduced sea-ice cover, and stronger winds are affecting the population recovery potential. The second was additive; in gray-headed albatrosses, not only did bycatch impact adult survival but also this impact was exacerbated by lower food availability in years following El Niño events. This emphasizes the need for much improved implementation of mitigation measures in fisheries and better enforcement of compliance. We hope our results not only help focus future management actions for these populations but also demonstrate the power of the modelling approach for assessing impacts of environmental and anthropogenic drivers in wild animal populations. Article in Journal/Newspaper Sea ice Natural Environment Research Council: NERC Open Research Archive Proceedings of the National Academy of Sciences 114 50 E10829 E10837 |
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Natural Environment Research Council: NERC Open Research Archive |
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English |
description |
Environmental and anthropogenic factors often drive population declines in top predators, but how their influences may combine remains unclear. Albatrosses are particularly threatened. They breed in fast-changing environments, and their extensive foraging ranges expose them to incidental mortality (bycatch) in multiple fisheries. The albatross community at South Georgia includes globally important populations of three species that have declined by 40–60% over the last 35 years. We used three steps to deeply understand the drivers of such dramatic changes: (i) describe fundamental demographic rates using multievent models, (ii) determine demographic drivers of population growth using matrix models, and (iii) identify environmental and anthropogenic drivers using ANOVAs. Each species was affected by different processes and threats in their foraging areas during the breeding and nonbreeding seasons. There was evidence for two kinds of combined environmental and anthropogenic effects. The first was sequential; in wandering and black-browed albatrosses, high levels of bycatch have reduced juvenile and adult survival, then increased temperature, reduced sea-ice cover, and stronger winds are affecting the population recovery potential. The second was additive; in gray-headed albatrosses, not only did bycatch impact adult survival but also this impact was exacerbated by lower food availability in years following El Niño events. This emphasizes the need for much improved implementation of mitigation measures in fisheries and better enforcement of compliance. We hope our results not only help focus future management actions for these populations but also demonstrate the power of the modelling approach for assessing impacts of environmental and anthropogenic drivers in wild animal populations. |
format |
Article in Journal/Newspaper |
author |
Pardo, Deborah Forcada, Jaume Wood, Andrew G. Tuck, Geoff N. Ireland, Louise Pradel, Roger Croxall, John P. Phillips, Richard A. |
spellingShingle |
Pardo, Deborah Forcada, Jaume Wood, Andrew G. Tuck, Geoff N. Ireland, Louise Pradel, Roger Croxall, John P. Phillips, Richard A. Additive effects of climate and fisheries drive ongoing declines in multiple albatross species |
author_facet |
Pardo, Deborah Forcada, Jaume Wood, Andrew G. Tuck, Geoff N. Ireland, Louise Pradel, Roger Croxall, John P. Phillips, Richard A. |
author_sort |
Pardo, Deborah |
title |
Additive effects of climate and fisheries drive ongoing declines in multiple albatross species |
title_short |
Additive effects of climate and fisheries drive ongoing declines in multiple albatross species |
title_full |
Additive effects of climate and fisheries drive ongoing declines in multiple albatross species |
title_fullStr |
Additive effects of climate and fisheries drive ongoing declines in multiple albatross species |
title_full_unstemmed |
Additive effects of climate and fisheries drive ongoing declines in multiple albatross species |
title_sort |
additive effects of climate and fisheries drive ongoing declines in multiple albatross species |
publisher |
National Academy of Sciences |
publishDate |
2017 |
url |
http://nora.nerc.ac.uk/id/eprint/518557/ https://nora.nerc.ac.uk/id/eprint/518557/1/Pardo.pdf http://www.pnas.org/content/114/50/E10829.short?rss=1 |
genre |
Sea ice |
genre_facet |
Sea ice |
op_relation |
https://nora.nerc.ac.uk/id/eprint/518557/1/Pardo.pdf Pardo, Deborah; Forcada, Jaume orcid:0000-0002-2115-0150 Wood, Andrew G.; Tuck, Geoff N.; Ireland, Louise orcid:0000-0003-0960-0486 Pradel, Roger; Croxall, John P.; Phillips, Richard A. 2017 Additive effects of climate and fisheries drive ongoing declines in multiple albatross species. Proceedings of the National Academy of Sciences, 114 (50). E10829-E10837. https://doi.org/10.1073/pnas.1618819114 <https://doi.org/10.1073/pnas.1618819114> |
op_doi |
https://doi.org/10.1073/pnas.1618819114 |
container_title |
Proceedings of the National Academy of Sciences |
container_volume |
114 |
container_issue |
50 |
container_start_page |
E10829 |
op_container_end_page |
E10837 |
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1766195303944290304 |