Data from: Berry production drives bottom-up effects on body mass and reproductive success in an omnivore
Obligate herbivores dominate studies of the effects of climate change on mammals, however there is limited empirical evidence for how changes in the abundance or quality of plant food affect mammalian omnivores. Omnivores can exploit a range of different food resources over the course of a year, but...
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ftdryad:oai:v1.datadryad.org:10255/dryad.146630 2023-05-15T18:42:15+02:00 Data from: Berry production drives bottom-up effects on body mass and reproductive success in an omnivore Hertel, Anne G. Bischof, Richard Langvall, Ola Mysterud, Atle Kindberg, Jonas Swenson, Jon E. Zedrosser, Andreas Central Sweden 2017-05-23T03:09:31Z http://hdl.handle.net/10255/dryad.146630 https://doi.org/10.5061/dryad.772g3 unknown doi:10.5061/dryad.772g3/1 doi:10.5061/dryad.772g3/2 doi:10.5061/dryad.772g3/3 doi:10.5061/dryad.772g3/4 doi:10.1111/oik.04515 doi:10.5061/dryad.772g3 Hertel AG, Bischof R, Langval O, Mysterud A, Kindberg J, Swenson JE, Zedrosser A (2018) Berry production drives bottom-up effects on body mass and reproductive success in an omnivore. Oikos 127(2): 197-207. 0030-1299 http://hdl.handle.net/10255/dryad.146630 life history traits masting climate effects Article 2017 ftdryad https://doi.org/10.5061/dryad.772g3 https://doi.org/10.5061/dryad.772g3/1 https://doi.org/10.5061/dryad.772g3/2 https://doi.org/10.5061/dryad.772g3/3 https://doi.org/10.5061/dryad.772g3/4 https://doi.org/10.1111/oik.04515 2020-01-01T15:51:18Z Obligate herbivores dominate studies of the effects of climate change on mammals, however there is limited empirical evidence for how changes in the abundance or quality of plant food affect mammalian omnivores. Omnivores can exploit a range of different food resources over the course of a year, but they often rely on seasonally restricted highly nutritious fruiting bodies during critical life stages. Brown bears Ursus arctos in Sweden are dependent on berries for fattening before entering hibernation. We used a ten-year time series to evaluate the effect of temperature and snow on annual variation in berry abundance and how this variation affected bears. We found marked interannual variation in berry production of bilberry Vaccinium myrtillus and lingonberry V. vitis-idaea, that we could attribute in part to temperature during plant dormancy and flowering and precipitation during fruit ripening. Both, autumn weights of female bears and spring weights of yearling bears increased linearly with bilberry abundance. When bilberry abundance was low, lightweight female bears had a lower reproductive success than females in better condition. This effect vanished when food abundance was above average, indicating that lightweight females could compensate for their initial weight during good bilberry years. Our study highlights the importance of considering individuals’ dynamic responses to variation in food availability, which leave some more vulnerable to food shortage than others. Individual life-history heterogeneity in response to resource variation likely affects long-term population recruitment. Our findings emphasize that Scandinavian bears can be dependent on a single food resource during a critical period of the year and are therefore less resilient to environmental change than expected for an omnivore. Future climate scenarios predict ambiguous trends for weather covariates that affected crucial stages of berry phenology, preventing a clear prognosis of how climate change may affect long-term bilberry production. Article in Journal/Newspaper Ursus arctos Dryad Digital Repository (Duke University) |
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Open Polar |
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Dryad Digital Repository (Duke University) |
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ftdryad |
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unknown |
topic |
life history traits masting climate effects |
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life history traits masting climate effects Hertel, Anne G. Bischof, Richard Langvall, Ola Mysterud, Atle Kindberg, Jonas Swenson, Jon E. Zedrosser, Andreas Data from: Berry production drives bottom-up effects on body mass and reproductive success in an omnivore |
topic_facet |
life history traits masting climate effects |
description |
Obligate herbivores dominate studies of the effects of climate change on mammals, however there is limited empirical evidence for how changes in the abundance or quality of plant food affect mammalian omnivores. Omnivores can exploit a range of different food resources over the course of a year, but they often rely on seasonally restricted highly nutritious fruiting bodies during critical life stages. Brown bears Ursus arctos in Sweden are dependent on berries for fattening before entering hibernation. We used a ten-year time series to evaluate the effect of temperature and snow on annual variation in berry abundance and how this variation affected bears. We found marked interannual variation in berry production of bilberry Vaccinium myrtillus and lingonberry V. vitis-idaea, that we could attribute in part to temperature during plant dormancy and flowering and precipitation during fruit ripening. Both, autumn weights of female bears and spring weights of yearling bears increased linearly with bilberry abundance. When bilberry abundance was low, lightweight female bears had a lower reproductive success than females in better condition. This effect vanished when food abundance was above average, indicating that lightweight females could compensate for their initial weight during good bilberry years. Our study highlights the importance of considering individuals’ dynamic responses to variation in food availability, which leave some more vulnerable to food shortage than others. Individual life-history heterogeneity in response to resource variation likely affects long-term population recruitment. Our findings emphasize that Scandinavian bears can be dependent on a single food resource during a critical period of the year and are therefore less resilient to environmental change than expected for an omnivore. Future climate scenarios predict ambiguous trends for weather covariates that affected crucial stages of berry phenology, preventing a clear prognosis of how climate change may affect long-term bilberry production. |
format |
Article in Journal/Newspaper |
author |
Hertel, Anne G. Bischof, Richard Langvall, Ola Mysterud, Atle Kindberg, Jonas Swenson, Jon E. Zedrosser, Andreas |
author_facet |
Hertel, Anne G. Bischof, Richard Langvall, Ola Mysterud, Atle Kindberg, Jonas Swenson, Jon E. Zedrosser, Andreas |
author_sort |
Hertel, Anne G. |
title |
Data from: Berry production drives bottom-up effects on body mass and reproductive success in an omnivore |
title_short |
Data from: Berry production drives bottom-up effects on body mass and reproductive success in an omnivore |
title_full |
Data from: Berry production drives bottom-up effects on body mass and reproductive success in an omnivore |
title_fullStr |
Data from: Berry production drives bottom-up effects on body mass and reproductive success in an omnivore |
title_full_unstemmed |
Data from: Berry production drives bottom-up effects on body mass and reproductive success in an omnivore |
title_sort |
data from: berry production drives bottom-up effects on body mass and reproductive success in an omnivore |
publishDate |
2017 |
url |
http://hdl.handle.net/10255/dryad.146630 https://doi.org/10.5061/dryad.772g3 |
op_coverage |
Central Sweden |
genre |
Ursus arctos |
genre_facet |
Ursus arctos |
op_relation |
doi:10.5061/dryad.772g3/1 doi:10.5061/dryad.772g3/2 doi:10.5061/dryad.772g3/3 doi:10.5061/dryad.772g3/4 doi:10.1111/oik.04515 doi:10.5061/dryad.772g3 Hertel AG, Bischof R, Langval O, Mysterud A, Kindberg J, Swenson JE, Zedrosser A (2018) Berry production drives bottom-up effects on body mass and reproductive success in an omnivore. Oikos 127(2): 197-207. 0030-1299 http://hdl.handle.net/10255/dryad.146630 |
op_doi |
https://doi.org/10.5061/dryad.772g3 https://doi.org/10.5061/dryad.772g3/1 https://doi.org/10.5061/dryad.772g3/2 https://doi.org/10.5061/dryad.772g3/3 https://doi.org/10.5061/dryad.772g3/4 https://doi.org/10.1111/oik.04515 |
_version_ |
1766231881041313792 |