Climate change impacts on berry shrub performance in treeline and tundra ecosystems
Climate variability and warming are directly, indirectly and irrefutably driving widespread changes in global aquatic and terrestrial ecosystems, with disproportionate poleward impacts. Across Arctic treeline and tundra, understanding how current and future changes will negatively affect subsistence...
Main Author: | |
---|---|
Format: | Thesis |
Language: | English |
Published: |
Memorial University of Newfoundland
2020
|
Subjects: | |
Online Access: | https://research.library.mun.ca/14436/ https://research.library.mun.ca/14436/1/thesis.pdf |
id |
ftmemorialuniv:oai:research.library.mun.ca:14436 |
---|---|
record_format |
openpolar |
spelling |
ftmemorialuniv:oai:research.library.mun.ca:14436 2023-10-01T03:53:36+02:00 Climate change impacts on berry shrub performance in treeline and tundra ecosystems Siegwart Collier, Laura 2020-04 application/pdf https://research.library.mun.ca/14436/ https://research.library.mun.ca/14436/1/thesis.pdf en eng Memorial University of Newfoundland https://research.library.mun.ca/14436/1/thesis.pdf Siegwart Collier, Laura <https://research.library.mun.ca/view/creator_az/Siegwart_Collier=3ALaura=3A=3A.html> (2020) Climate change impacts on berry shrub performance in treeline and tundra ecosystems. Doctoral (PhD) thesis, Memorial University of Newfoundland. thesis_license Thesis NonPeerReviewed 2020 ftmemorialuniv 2023-09-03T06:49:45Z Climate variability and warming are directly, indirectly and irrefutably driving widespread changes in global aquatic and terrestrial ecosystems, with disproportionate poleward impacts. Across Arctic treeline and tundra, understanding how current and future changes will negatively affect subsistence resources is critical to mitigating climate change impacts on Indigenous peoples and northern flora and fauna. In this study, I looked to Inuit knowledge and western scientific approaches at local and regional scales across Inuit Nunangat (Inuit regions of Canada, including Nunavut, Nunavik, and Nunatsiavut) to explore and test the impacts of climate variability and warming on treeline and tundra berry species, which are critical resources in Arctic ecological and cultural systems. My central hypothesis, which is rooted in local, traditional and scientific knowledge, is that climate-driven expansion of tall-shrub canopies will negatively impact fruit production of dwarf berry shrubs. Through mixed methods approaches, including participatory interviews, climate analyses, ecological surveys, and experimental warming at different spatial and temporal scales, this study identifies the fundamental role of local processes in driving and explaining changes in dwarf berry shrub growth (abundance and height) and fruit production (occurrence and abundance of fruit) in eastern Low Arctic and Sub-Arctic Canada. The results consistently demonstrate that growth and fruit production of truly prostrate berry shrubs (i.e. Vaccinium vitis-idaea and Empetrum nigrum) with limited phenotypic plasticity in height growth are most at risk from warming and tundra shrubification in comparison to berry shrubs with greater height growth plasticity (V. uliginosum) due to canopy impacts on local resources. With this knowledge, I anticipate that the boundaries between low and tall shrub tundra plant communities will be zones of significant change in berry resources. Local resource mapping, with a specific focus on these transition zones will be ... Thesis Arctic Climate change Empetrum nigrum inuit Nunavut Tundra Nunavik Memorial University of Newfoundland: Research Repository Arctic Canada Nunavik Nunavut |
institution |
Open Polar |
collection |
Memorial University of Newfoundland: Research Repository |
op_collection_id |
ftmemorialuniv |
language |
English |
description |
Climate variability and warming are directly, indirectly and irrefutably driving widespread changes in global aquatic and terrestrial ecosystems, with disproportionate poleward impacts. Across Arctic treeline and tundra, understanding how current and future changes will negatively affect subsistence resources is critical to mitigating climate change impacts on Indigenous peoples and northern flora and fauna. In this study, I looked to Inuit knowledge and western scientific approaches at local and regional scales across Inuit Nunangat (Inuit regions of Canada, including Nunavut, Nunavik, and Nunatsiavut) to explore and test the impacts of climate variability and warming on treeline and tundra berry species, which are critical resources in Arctic ecological and cultural systems. My central hypothesis, which is rooted in local, traditional and scientific knowledge, is that climate-driven expansion of tall-shrub canopies will negatively impact fruit production of dwarf berry shrubs. Through mixed methods approaches, including participatory interviews, climate analyses, ecological surveys, and experimental warming at different spatial and temporal scales, this study identifies the fundamental role of local processes in driving and explaining changes in dwarf berry shrub growth (abundance and height) and fruit production (occurrence and abundance of fruit) in eastern Low Arctic and Sub-Arctic Canada. The results consistently demonstrate that growth and fruit production of truly prostrate berry shrubs (i.e. Vaccinium vitis-idaea and Empetrum nigrum) with limited phenotypic plasticity in height growth are most at risk from warming and tundra shrubification in comparison to berry shrubs with greater height growth plasticity (V. uliginosum) due to canopy impacts on local resources. With this knowledge, I anticipate that the boundaries between low and tall shrub tundra plant communities will be zones of significant change in berry resources. Local resource mapping, with a specific focus on these transition zones will be ... |
format |
Thesis |
author |
Siegwart Collier, Laura |
spellingShingle |
Siegwart Collier, Laura Climate change impacts on berry shrub performance in treeline and tundra ecosystems |
author_facet |
Siegwart Collier, Laura |
author_sort |
Siegwart Collier, Laura |
title |
Climate change impacts on berry shrub performance in treeline and tundra ecosystems |
title_short |
Climate change impacts on berry shrub performance in treeline and tundra ecosystems |
title_full |
Climate change impacts on berry shrub performance in treeline and tundra ecosystems |
title_fullStr |
Climate change impacts on berry shrub performance in treeline and tundra ecosystems |
title_full_unstemmed |
Climate change impacts on berry shrub performance in treeline and tundra ecosystems |
title_sort |
climate change impacts on berry shrub performance in treeline and tundra ecosystems |
publisher |
Memorial University of Newfoundland |
publishDate |
2020 |
url |
https://research.library.mun.ca/14436/ https://research.library.mun.ca/14436/1/thesis.pdf |
geographic |
Arctic Canada Nunavik Nunavut |
geographic_facet |
Arctic Canada Nunavik Nunavut |
genre |
Arctic Climate change Empetrum nigrum inuit Nunavut Tundra Nunavik |
genre_facet |
Arctic Climate change Empetrum nigrum inuit Nunavut Tundra Nunavik |
op_relation |
https://research.library.mun.ca/14436/1/thesis.pdf Siegwart Collier, Laura <https://research.library.mun.ca/view/creator_az/Siegwart_Collier=3ALaura=3A=3A.html> (2020) Climate change impacts on berry shrub performance in treeline and tundra ecosystems. Doctoral (PhD) thesis, Memorial University of Newfoundland. |
op_rights |
thesis_license |
_version_ |
1778520275500924928 |