Insect seed and cone predation reduces reproductive potential of treeline conifers across northern Canada
Abstract Aim Altitudinal and latitudinal treeline ecotones have not consistently responded to climate warming in the direction and/or magnitude predicted by climate alone, suggesting that non‐climatic mechanisms (e.g. biotic interactions) also mediate treeline range dynamics. Through a collaborative...
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Online Access: | http://dx.doi.org/10.1111/jbi.14539 https://onlinelibrary.wiley.com/doi/pdf/10.1111/jbi.14539 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/jbi.14539 |
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crwiley:10.1111/jbi.14539 2024-03-24T09:03:31+00:00 Insect seed and cone predation reduces reproductive potential of treeline conifers across northern Canada Brehaut, Lucas Goodwin, Katie J. A. Reid, Kirsten A. Crofts, Anna L. Danby, Ryan K. Mamet, Steven D. Brown, Carissa D. Association of Canadian Universities for Northern Studies Natural Sciences and Engineering Research Council of Canada Polar Knowledge Canada Royal Canadian Geographical Society 2022 http://dx.doi.org/10.1111/jbi.14539 https://onlinelibrary.wiley.com/doi/pdf/10.1111/jbi.14539 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/jbi.14539 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Biogeography volume 50, issue 3, page 476-488 ISSN 0305-0270 1365-2699 Ecology Ecology, Evolution, Behavior and Systematics journal-article 2022 crwiley https://doi.org/10.1111/jbi.14539 2024-02-28T02:16:36Z Abstract Aim Altitudinal and latitudinal treeline ecotones have not consistently responded to climate warming in the direction and/or magnitude predicted by climate alone, suggesting that non‐climatic mechanisms (e.g. biotic interactions) also mediate treeline range dynamics. Through a collaborative research approach, we assessed environmental conditions associated with pre‐dispersal insect cone granivory and how this biotic interaction may govern the reproductive potential, and therefore range dynamics, of spruce‐dominated treelines across northern Canada. Location In all, 10 boreal forest treelines, tundra and alpine, from Yukon to Newfoundland and Labrador, Canada. Taxa White spruce ( Picea glauca [Moench] Voss), Black spruce ( Picea mariana [Mill.] B.S.P.), Strobilomyia spp., Megastigmus spp. Methods Treeline sites were assessed for presence and magnitude of pre‐dispersal seed granivory by insects along with viable seed availability. We quantified stand density metrics, organic layer depth and understorey vegetation composition at each location and, subsequently, incorporated those variables into generalized linear mixed models to establish predictors of granivory magnitude and viability of available seed. Results Insect granivory was widespread across sites; however, site‐specific patterns of granivory were associated with increased moss cover and decreased shrub cover and stand density. While all black spruce‐dominated sites exhibited seed viability rates > 50%, the number of seeds produced per cone varied, suggesting that within‐site abiotic conditions and biotic interaction pressures limit successful colonization of novel environments in advance of seed dispersal. Main Conclusions The modelled relationships between granivory, seed viability and environmental conditions represent an essential step towards generalizing how and when biotic interactions across subarctic treelines influence boreal tree range dynamics before seed dispersal. Connections between granivory magnitude and site‐level treeline ... Article in Journal/Newspaper Newfoundland Subarctic Tundra Yukon Wiley Online Library Canada Newfoundland Yukon Journal of Biogeography 50 3 476 488 |
institution |
Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
topic |
Ecology Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Ecology Ecology, Evolution, Behavior and Systematics Brehaut, Lucas Goodwin, Katie J. A. Reid, Kirsten A. Crofts, Anna L. Danby, Ryan K. Mamet, Steven D. Brown, Carissa D. Insect seed and cone predation reduces reproductive potential of treeline conifers across northern Canada |
topic_facet |
Ecology Ecology, Evolution, Behavior and Systematics |
description |
Abstract Aim Altitudinal and latitudinal treeline ecotones have not consistently responded to climate warming in the direction and/or magnitude predicted by climate alone, suggesting that non‐climatic mechanisms (e.g. biotic interactions) also mediate treeline range dynamics. Through a collaborative research approach, we assessed environmental conditions associated with pre‐dispersal insect cone granivory and how this biotic interaction may govern the reproductive potential, and therefore range dynamics, of spruce‐dominated treelines across northern Canada. Location In all, 10 boreal forest treelines, tundra and alpine, from Yukon to Newfoundland and Labrador, Canada. Taxa White spruce ( Picea glauca [Moench] Voss), Black spruce ( Picea mariana [Mill.] B.S.P.), Strobilomyia spp., Megastigmus spp. Methods Treeline sites were assessed for presence and magnitude of pre‐dispersal seed granivory by insects along with viable seed availability. We quantified stand density metrics, organic layer depth and understorey vegetation composition at each location and, subsequently, incorporated those variables into generalized linear mixed models to establish predictors of granivory magnitude and viability of available seed. Results Insect granivory was widespread across sites; however, site‐specific patterns of granivory were associated with increased moss cover and decreased shrub cover and stand density. While all black spruce‐dominated sites exhibited seed viability rates > 50%, the number of seeds produced per cone varied, suggesting that within‐site abiotic conditions and biotic interaction pressures limit successful colonization of novel environments in advance of seed dispersal. Main Conclusions The modelled relationships between granivory, seed viability and environmental conditions represent an essential step towards generalizing how and when biotic interactions across subarctic treelines influence boreal tree range dynamics before seed dispersal. Connections between granivory magnitude and site‐level treeline ... |
author2 |
Association of Canadian Universities for Northern Studies Natural Sciences and Engineering Research Council of Canada Polar Knowledge Canada Royal Canadian Geographical Society |
format |
Article in Journal/Newspaper |
author |
Brehaut, Lucas Goodwin, Katie J. A. Reid, Kirsten A. Crofts, Anna L. Danby, Ryan K. Mamet, Steven D. Brown, Carissa D. |
author_facet |
Brehaut, Lucas Goodwin, Katie J. A. Reid, Kirsten A. Crofts, Anna L. Danby, Ryan K. Mamet, Steven D. Brown, Carissa D. |
author_sort |
Brehaut, Lucas |
title |
Insect seed and cone predation reduces reproductive potential of treeline conifers across northern Canada |
title_short |
Insect seed and cone predation reduces reproductive potential of treeline conifers across northern Canada |
title_full |
Insect seed and cone predation reduces reproductive potential of treeline conifers across northern Canada |
title_fullStr |
Insect seed and cone predation reduces reproductive potential of treeline conifers across northern Canada |
title_full_unstemmed |
Insect seed and cone predation reduces reproductive potential of treeline conifers across northern Canada |
title_sort |
insect seed and cone predation reduces reproductive potential of treeline conifers across northern canada |
publisher |
Wiley |
publishDate |
2022 |
url |
http://dx.doi.org/10.1111/jbi.14539 https://onlinelibrary.wiley.com/doi/pdf/10.1111/jbi.14539 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/jbi.14539 |
geographic |
Canada Newfoundland Yukon |
geographic_facet |
Canada Newfoundland Yukon |
genre |
Newfoundland Subarctic Tundra Yukon |
genre_facet |
Newfoundland Subarctic Tundra Yukon |
op_source |
Journal of Biogeography volume 50, issue 3, page 476-488 ISSN 0305-0270 1365-2699 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/jbi.14539 |
container_title |
Journal of Biogeography |
container_volume |
50 |
container_issue |
3 |
container_start_page |
476 |
op_container_end_page |
488 |
_version_ |
1794404428313264128 |