Data from: Simulated caribou browsing limits the effect of nutrient addition on the growth of Betula glandulosa, an expanding shrub species in Eastern Canada
1.Warmer summer temperatures and enhanced soil fertility increase shrub growth in tundra ecosystems, and these factors have likely contributed to shrub expansion at the circumpolar scale over the last decades. Conversely, large herbivores have the potential to counteract the positive impacts of clim...
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Online Access: | http://hdl.handle.net/10255/dryad.160818 https://doi.org/10.5061/dryad.50t9d |
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ftdryad:oai:v1.datadryad.org:10255/dryad.160818 2023-05-15T15:03:48+02:00 Data from: Simulated caribou browsing limits the effect of nutrient addition on the growth of Betula glandulosa, an expanding shrub species in Eastern Canada Morrissette-Boileau, Clara Boudreau, Stéphane Tremblay, Jean-Pierre Côté, Steeve D. 62.093025N 74.303636W cenozoic quaternary 2017-11-07T22:16:31Z http://hdl.handle.net/10255/dryad.160818 https://doi.org/10.5061/dryad.50t9d unknown doi:10.5061/dryad.50t9d/1 doi:10.5061/dryad.50t9d/2 doi:10.5061/dryad.50t9d/3 doi:10.1111/1365-2745.12899 doi:10.5061/dryad.50t9d Morrissette-Boileau C, Boudreau S, Tremblay J, Côté SD (2018) Simulated caribou browsing limits the effect of nutrient addition on the growth of Betula glandulosa, an expanding shrub species in Eastern Canada. Journal of Ecology 106(3): 1256-1265. http://hdl.handle.net/10255/dryad.160818 Plant–herbivore interactions Arctic tundra Leaf and woody biomass Nitrogen addition Radial growth Shrub expansion Warming treatment Simulated caribou browsingg Article 2017 ftdryad https://doi.org/10.5061/dryad.50t9d https://doi.org/10.5061/dryad.50t9d/1 https://doi.org/10.5061/dryad.50t9d/2 https://doi.org/10.5061/dryad.50t9d/3 https://doi.org/10.1111/1365-2745.12899 2020-01-01T15:58:49Z 1.Warmer summer temperatures and enhanced soil fertility increase shrub growth in tundra ecosystems, and these factors have likely contributed to shrub expansion at the circumpolar scale over the last decades. Conversely, large herbivores have the potential to counteract the positive impacts of climate change on shrub growth. Indeed, by stripping the leaves, herbivores have the potential to control the growth of shrub species and, consequently, limit their expansion. 2.To disentangle the impacts of climate change and herbivory on Betula glandulosa Michx., we conducted a 5-yr factorial experiment near Deception Bay, Nunavik, Canada, in which we simulated warmer temperatures, increased nitrogen availability and three caribou browsing intensities during the growing season. At the end of the experiment, we harvested the aboveground biomass of B. glandulosa and conducted dendrochronological analyses on stems. 3.Fertilized plots under ambient temperature had 34% greater shrub biomass than plots assigned to the combined treatment of nitrogen addition and warmer temperatures. Browsing intensity had no effect on final biomass. Nitrogen addition increased radial growth (18-33%; 3 years out of 5). Overall, browsing had a cumulative negative impact on B. glandulosa radial growth during the 5-yr experiment. While browsing had no effect in the first year of the experiment, moderate browsing (leaves stripped on 25% of available shoots) decreased radial growth by 27% at year 2, 32% at year 4 and 27% at year 5. Heavy browsing (leaves stripped on 75% of available shoots annually) decreased radial growth by approximately 27% at year 2, 37% at year 3, 50% at year 4 and 48% at year 5. We did not observe significant interactions between browsing, temperature and nitrogen availability. 4.Synthesis. Our results clearly showed that caribou browsing may limit the growth of B. glandulosa, and thus can potentially limit its expansion. Herbivory should thus be considered when predicting tundra vegetation changes in the Arctic, at least in areas with high herbivore densities. Article in Journal/Newspaper Arctic Climate change Tundra Nunavik Dryad Digital Repository (Duke University) Arctic Nunavik Canada |
institution |
Open Polar |
collection |
Dryad Digital Repository (Duke University) |
op_collection_id |
ftdryad |
language |
unknown |
topic |
Plant–herbivore interactions Arctic tundra Leaf and woody biomass Nitrogen addition Radial growth Shrub expansion Warming treatment Simulated caribou browsingg |
spellingShingle |
Plant–herbivore interactions Arctic tundra Leaf and woody biomass Nitrogen addition Radial growth Shrub expansion Warming treatment Simulated caribou browsingg Morrissette-Boileau, Clara Boudreau, Stéphane Tremblay, Jean-Pierre Côté, Steeve D. Data from: Simulated caribou browsing limits the effect of nutrient addition on the growth of Betula glandulosa, an expanding shrub species in Eastern Canada |
topic_facet |
Plant–herbivore interactions Arctic tundra Leaf and woody biomass Nitrogen addition Radial growth Shrub expansion Warming treatment Simulated caribou browsingg |
description |
1.Warmer summer temperatures and enhanced soil fertility increase shrub growth in tundra ecosystems, and these factors have likely contributed to shrub expansion at the circumpolar scale over the last decades. Conversely, large herbivores have the potential to counteract the positive impacts of climate change on shrub growth. Indeed, by stripping the leaves, herbivores have the potential to control the growth of shrub species and, consequently, limit their expansion. 2.To disentangle the impacts of climate change and herbivory on Betula glandulosa Michx., we conducted a 5-yr factorial experiment near Deception Bay, Nunavik, Canada, in which we simulated warmer temperatures, increased nitrogen availability and three caribou browsing intensities during the growing season. At the end of the experiment, we harvested the aboveground biomass of B. glandulosa and conducted dendrochronological analyses on stems. 3.Fertilized plots under ambient temperature had 34% greater shrub biomass than plots assigned to the combined treatment of nitrogen addition and warmer temperatures. Browsing intensity had no effect on final biomass. Nitrogen addition increased radial growth (18-33%; 3 years out of 5). Overall, browsing had a cumulative negative impact on B. glandulosa radial growth during the 5-yr experiment. While browsing had no effect in the first year of the experiment, moderate browsing (leaves stripped on 25% of available shoots) decreased radial growth by 27% at year 2, 32% at year 4 and 27% at year 5. Heavy browsing (leaves stripped on 75% of available shoots annually) decreased radial growth by approximately 27% at year 2, 37% at year 3, 50% at year 4 and 48% at year 5. We did not observe significant interactions between browsing, temperature and nitrogen availability. 4.Synthesis. Our results clearly showed that caribou browsing may limit the growth of B. glandulosa, and thus can potentially limit its expansion. Herbivory should thus be considered when predicting tundra vegetation changes in the Arctic, at least in areas with high herbivore densities. |
format |
Article in Journal/Newspaper |
author |
Morrissette-Boileau, Clara Boudreau, Stéphane Tremblay, Jean-Pierre Côté, Steeve D. |
author_facet |
Morrissette-Boileau, Clara Boudreau, Stéphane Tremblay, Jean-Pierre Côté, Steeve D. |
author_sort |
Morrissette-Boileau, Clara |
title |
Data from: Simulated caribou browsing limits the effect of nutrient addition on the growth of Betula glandulosa, an expanding shrub species in Eastern Canada |
title_short |
Data from: Simulated caribou browsing limits the effect of nutrient addition on the growth of Betula glandulosa, an expanding shrub species in Eastern Canada |
title_full |
Data from: Simulated caribou browsing limits the effect of nutrient addition on the growth of Betula glandulosa, an expanding shrub species in Eastern Canada |
title_fullStr |
Data from: Simulated caribou browsing limits the effect of nutrient addition on the growth of Betula glandulosa, an expanding shrub species in Eastern Canada |
title_full_unstemmed |
Data from: Simulated caribou browsing limits the effect of nutrient addition on the growth of Betula glandulosa, an expanding shrub species in Eastern Canada |
title_sort |
data from: simulated caribou browsing limits the effect of nutrient addition on the growth of betula glandulosa, an expanding shrub species in eastern canada |
publishDate |
2017 |
url |
http://hdl.handle.net/10255/dryad.160818 https://doi.org/10.5061/dryad.50t9d |
op_coverage |
62.093025N 74.303636W cenozoic quaternary |
geographic |
Arctic Nunavik Canada |
geographic_facet |
Arctic Nunavik Canada |
genre |
Arctic Climate change Tundra Nunavik |
genre_facet |
Arctic Climate change Tundra Nunavik |
op_relation |
doi:10.5061/dryad.50t9d/1 doi:10.5061/dryad.50t9d/2 doi:10.5061/dryad.50t9d/3 doi:10.1111/1365-2745.12899 doi:10.5061/dryad.50t9d Morrissette-Boileau C, Boudreau S, Tremblay J, Côté SD (2018) Simulated caribou browsing limits the effect of nutrient addition on the growth of Betula glandulosa, an expanding shrub species in Eastern Canada. Journal of Ecology 106(3): 1256-1265. http://hdl.handle.net/10255/dryad.160818 |
op_doi |
https://doi.org/10.5061/dryad.50t9d https://doi.org/10.5061/dryad.50t9d/1 https://doi.org/10.5061/dryad.50t9d/2 https://doi.org/10.5061/dryad.50t9d/3 https://doi.org/10.1111/1365-2745.12899 |
_version_ |
1766335655064895488 |