Data from: Reproduction as a bottleneck to treeline advance across the circumarctic forest tundra ecotone
The fundamental niche of many species is shifting with climate change, especially in sub-arctic ecosystems with pronounced recent warming. Ongoing warming in sub-arctic regions should lessen environmental constraints on tree growth and reproduction, leading to increased success of trees colonising t...
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ftzenodo:oai:zenodo.org:4975694 2024-09-15T18:02:30+00:00 Data from: Reproduction as a bottleneck to treeline advance across the circumarctic forest tundra ecotone Brown, Carissa D. Dufour-Tremblay, Geneviève Jameson, Ryan G. Mamet, Steven D. Trant, Andrew J. Walker, Xanthe J. Boudraeu, Stéphane Harper, Karen A. Henry, Greg H.R. Hermanutz, Luise Hofgaard, Annika Isaeva, Ludmila Kershaw, G. Peter Johnstone, Jill F. Henry, Gregory H. R. 2018-07-05 https://doi.org/10.5061/dryad.m58sp14 unknown Zenodo https://doi.org/10.1111/ecog.03733 https://zenodo.org/communities/dryad https://doi.org/10.5061/dryad.m58sp14 oai:zenodo.org:4975694 info:eu-repo/semantics/openAccess Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode Abies balsamea Picea glauca Larix laricina Abies lasiocarpa Betula pubescens ssp. tortuosa tree reproduction Pinus sylvestris Picea mariana treeline ecotone info:eu-repo/semantics/other 2018 ftzenodo https://doi.org/10.5061/dryad.m58sp1410.1111/ecog.03733 2024-07-27T02:39:15Z The fundamental niche of many species is shifting with climate change, especially in sub-arctic ecosystems with pronounced recent warming. Ongoing warming in sub-arctic regions should lessen environmental constraints on tree growth and reproduction, leading to increased success of trees colonising tundra. Nevertheless, variable responses of treeline ecotones have been documented in association with warming temperatures. One explanation for time lags between increasingly favourable environmental conditions and treeline ecotone movement is reproductive limitations caused by low seed availability. Our objective was to assess the reproductive constraints of the dominant tree species at the treeline ecotone in the circumpolar north. We sampled reproductive structures of trees (cones and catkins) and stand attributes across circumarctic treeline ecotones. We used generalized linear mixed models to estimate the sensitivity of seed production and the availability of viable seed to regional climate, stand structure, and species-specific characteristics. Both seed production and viability of available seed were strongly driven by specific, sequential seasonal climatic conditions, but in different ways. Seed production was greatest when growing seasons with more growing degree days coincided with years with high precipitation. Two consecutive years with more growing degree days and low precipitation resulted in low seed production. Seasonal climate effects on the viability of available seed depended on the physical characteristics of the reproductive structures. Large-coned and -seeded species take more time to develop mature embryos and were therefore more sensitive to increases in growing degree days in the year of flowering and embryo development. Our findings suggest that both moisture stress and abbreviated growing seasons can have a notable negative influence on the production and viability of available seed at treeline. Our synthesis revealed that constraints on predispersal reproduction within the treeline ecotone ... Other/Unknown Material Climate change Tundra Zenodo |
institution |
Open Polar |
collection |
Zenodo |
op_collection_id |
ftzenodo |
language |
unknown |
topic |
Abies balsamea Picea glauca Larix laricina Abies lasiocarpa Betula pubescens ssp. tortuosa tree reproduction Pinus sylvestris Picea mariana treeline ecotone |
spellingShingle |
Abies balsamea Picea glauca Larix laricina Abies lasiocarpa Betula pubescens ssp. tortuosa tree reproduction Pinus sylvestris Picea mariana treeline ecotone Brown, Carissa D. Dufour-Tremblay, Geneviève Jameson, Ryan G. Mamet, Steven D. Trant, Andrew J. Walker, Xanthe J. Boudraeu, Stéphane Harper, Karen A. Henry, Greg H.R. Hermanutz, Luise Hofgaard, Annika Isaeva, Ludmila Kershaw, G. Peter Johnstone, Jill F. Henry, Gregory H. R. Data from: Reproduction as a bottleneck to treeline advance across the circumarctic forest tundra ecotone |
topic_facet |
Abies balsamea Picea glauca Larix laricina Abies lasiocarpa Betula pubescens ssp. tortuosa tree reproduction Pinus sylvestris Picea mariana treeline ecotone |
description |
The fundamental niche of many species is shifting with climate change, especially in sub-arctic ecosystems with pronounced recent warming. Ongoing warming in sub-arctic regions should lessen environmental constraints on tree growth and reproduction, leading to increased success of trees colonising tundra. Nevertheless, variable responses of treeline ecotones have been documented in association with warming temperatures. One explanation for time lags between increasingly favourable environmental conditions and treeline ecotone movement is reproductive limitations caused by low seed availability. Our objective was to assess the reproductive constraints of the dominant tree species at the treeline ecotone in the circumpolar north. We sampled reproductive structures of trees (cones and catkins) and stand attributes across circumarctic treeline ecotones. We used generalized linear mixed models to estimate the sensitivity of seed production and the availability of viable seed to regional climate, stand structure, and species-specific characteristics. Both seed production and viability of available seed were strongly driven by specific, sequential seasonal climatic conditions, but in different ways. Seed production was greatest when growing seasons with more growing degree days coincided with years with high precipitation. Two consecutive years with more growing degree days and low precipitation resulted in low seed production. Seasonal climate effects on the viability of available seed depended on the physical characteristics of the reproductive structures. Large-coned and -seeded species take more time to develop mature embryos and were therefore more sensitive to increases in growing degree days in the year of flowering and embryo development. Our findings suggest that both moisture stress and abbreviated growing seasons can have a notable negative influence on the production and viability of available seed at treeline. Our synthesis revealed that constraints on predispersal reproduction within the treeline ecotone ... |
format |
Other/Unknown Material |
author |
Brown, Carissa D. Dufour-Tremblay, Geneviève Jameson, Ryan G. Mamet, Steven D. Trant, Andrew J. Walker, Xanthe J. Boudraeu, Stéphane Harper, Karen A. Henry, Greg H.R. Hermanutz, Luise Hofgaard, Annika Isaeva, Ludmila Kershaw, G. Peter Johnstone, Jill F. Henry, Gregory H. R. |
author_facet |
Brown, Carissa D. Dufour-Tremblay, Geneviève Jameson, Ryan G. Mamet, Steven D. Trant, Andrew J. Walker, Xanthe J. Boudraeu, Stéphane Harper, Karen A. Henry, Greg H.R. Hermanutz, Luise Hofgaard, Annika Isaeva, Ludmila Kershaw, G. Peter Johnstone, Jill F. Henry, Gregory H. R. |
author_sort |
Brown, Carissa D. |
title |
Data from: Reproduction as a bottleneck to treeline advance across the circumarctic forest tundra ecotone |
title_short |
Data from: Reproduction as a bottleneck to treeline advance across the circumarctic forest tundra ecotone |
title_full |
Data from: Reproduction as a bottleneck to treeline advance across the circumarctic forest tundra ecotone |
title_fullStr |
Data from: Reproduction as a bottleneck to treeline advance across the circumarctic forest tundra ecotone |
title_full_unstemmed |
Data from: Reproduction as a bottleneck to treeline advance across the circumarctic forest tundra ecotone |
title_sort |
data from: reproduction as a bottleneck to treeline advance across the circumarctic forest tundra ecotone |
publisher |
Zenodo |
publishDate |
2018 |
url |
https://doi.org/10.5061/dryad.m58sp14 |
genre |
Climate change Tundra |
genre_facet |
Climate change Tundra |
op_relation |
https://doi.org/10.1111/ecog.03733 https://zenodo.org/communities/dryad https://doi.org/10.5061/dryad.m58sp14 oai:zenodo.org:4975694 |
op_rights |
info:eu-repo/semantics/openAccess Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode |
op_doi |
https://doi.org/10.5061/dryad.m58sp1410.1111/ecog.03733 |
_version_ |
1810439950653456384 |