Energetic consequences of a major change in habitat use: endangered Brent Geese Branta bernicla hrota losing their main food resource
Coastal seagrasses are declining at increasing rates worldwide, forcing herbivores previously reliant on these habitats to abandon them in search of alternative ways to fulfil their daily energy budgets. After two decades of declining seagrass abundance in Mariager Fjord, Denmark, the Svalbard breed...
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crwiley:10.1111/j.1474-919x.2012.01265.x 2024-10-13T14:06:26+00:00 Energetic consequences of a major change in habitat use: endangered Brent Geese Branta bernicla hrota losing their main food resource Clausen, Kevin Kuhlmann Clausen, Preben Fælled, Casper Cæsar Mouritsen, Kim Nørgaard Frederiksen, Morten 2012 http://dx.doi.org/10.1111/j.1474-919x.2012.01265.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1474-919X.2012.01265.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1474-919X.2012.01265.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Ibis volume 154, issue 4, page 803-814 ISSN 0019-1019 1474-919X journal-article 2012 crwiley https://doi.org/10.1111/j.1474-919x.2012.01265.x 2024-09-17T04:44:49Z Coastal seagrasses are declining at increasing rates worldwide, forcing herbivores previously reliant on these habitats to abandon them in search of alternative ways to fulfil their daily energy budgets. After two decades of declining seagrass abundance in Mariager Fjord, Denmark, the Svalbard breeding population of Light‐bellied Brent Geese Branta bernicla hrota has experienced substantial changes in habitat use at this traditional autumn staging area. Declines in seagrasses have caused birds to depend increasingly on Sea Lettuce Ulva lactuca in recent years, and forced birds into terrestrial habitats such as saltmarsh and winter wheat. In contrast to those birds exploiting aquatic habitats, birds relying on these new habitats showed higher energy expenditure and failed to balance their energy budget. Eelgrass ( Zostera ) was energetically superior to other food resources, with marine Ulva being second best. Predicted body mass development under two different scenarios indicate that present habitat use resulted in a midwinter body mass around 122 g lower than just 20 years ago, equivalent to c . 9.4% of Brent Goose body weight. Even after controlling for inter‐annual differences in thermoregulatory costs, the effect of changes in habitat use translated into a body mass reduction of c . 56 g, which could adversely affect survival and future reproduction. Flyway‐wide declines in Zostera abundance and further reductions in traditional habitats due to climate change give cause to reassess projected population trends and consequent management implications for the East Atlantic flyway population of Light‐bellied Brent Geese. Article in Journal/Newspaper Branta bernicla brent geese Brent goose Svalbard Wiley Online Library Mariager Fjord ENVELOPE(-21.833,-21.833,71.000,71.000) Midwinter ENVELOPE(139.931,139.931,-66.690,-66.690) Svalbard Ibis 154 4 803 814 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
Coastal seagrasses are declining at increasing rates worldwide, forcing herbivores previously reliant on these habitats to abandon them in search of alternative ways to fulfil their daily energy budgets. After two decades of declining seagrass abundance in Mariager Fjord, Denmark, the Svalbard breeding population of Light‐bellied Brent Geese Branta bernicla hrota has experienced substantial changes in habitat use at this traditional autumn staging area. Declines in seagrasses have caused birds to depend increasingly on Sea Lettuce Ulva lactuca in recent years, and forced birds into terrestrial habitats such as saltmarsh and winter wheat. In contrast to those birds exploiting aquatic habitats, birds relying on these new habitats showed higher energy expenditure and failed to balance their energy budget. Eelgrass ( Zostera ) was energetically superior to other food resources, with marine Ulva being second best. Predicted body mass development under two different scenarios indicate that present habitat use resulted in a midwinter body mass around 122 g lower than just 20 years ago, equivalent to c . 9.4% of Brent Goose body weight. Even after controlling for inter‐annual differences in thermoregulatory costs, the effect of changes in habitat use translated into a body mass reduction of c . 56 g, which could adversely affect survival and future reproduction. Flyway‐wide declines in Zostera abundance and further reductions in traditional habitats due to climate change give cause to reassess projected population trends and consequent management implications for the East Atlantic flyway population of Light‐bellied Brent Geese. |
author2 |
Frederiksen, Morten |
format |
Article in Journal/Newspaper |
author |
Clausen, Kevin Kuhlmann Clausen, Preben Fælled, Casper Cæsar Mouritsen, Kim Nørgaard |
spellingShingle |
Clausen, Kevin Kuhlmann Clausen, Preben Fælled, Casper Cæsar Mouritsen, Kim Nørgaard Energetic consequences of a major change in habitat use: endangered Brent Geese Branta bernicla hrota losing their main food resource |
author_facet |
Clausen, Kevin Kuhlmann Clausen, Preben Fælled, Casper Cæsar Mouritsen, Kim Nørgaard |
author_sort |
Clausen, Kevin Kuhlmann |
title |
Energetic consequences of a major change in habitat use: endangered Brent Geese Branta bernicla hrota losing their main food resource |
title_short |
Energetic consequences of a major change in habitat use: endangered Brent Geese Branta bernicla hrota losing their main food resource |
title_full |
Energetic consequences of a major change in habitat use: endangered Brent Geese Branta bernicla hrota losing their main food resource |
title_fullStr |
Energetic consequences of a major change in habitat use: endangered Brent Geese Branta bernicla hrota losing their main food resource |
title_full_unstemmed |
Energetic consequences of a major change in habitat use: endangered Brent Geese Branta bernicla hrota losing their main food resource |
title_sort |
energetic consequences of a major change in habitat use: endangered brent geese branta bernicla hrota losing their main food resource |
publisher |
Wiley |
publishDate |
2012 |
url |
http://dx.doi.org/10.1111/j.1474-919x.2012.01265.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1474-919X.2012.01265.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1474-919X.2012.01265.x |
long_lat |
ENVELOPE(-21.833,-21.833,71.000,71.000) ENVELOPE(139.931,139.931,-66.690,-66.690) |
geographic |
Mariager Fjord Midwinter Svalbard |
geographic_facet |
Mariager Fjord Midwinter Svalbard |
genre |
Branta bernicla brent geese Brent goose Svalbard |
genre_facet |
Branta bernicla brent geese Brent goose Svalbard |
op_source |
Ibis volume 154, issue 4, page 803-814 ISSN 0019-1019 1474-919X |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1474-919x.2012.01265.x |
container_title |
Ibis |
container_volume |
154 |
container_issue |
4 |
container_start_page |
803 |
op_container_end_page |
814 |
_version_ |
1812812592154935296 |