The impacts of shrub abundance on microclimate and decomposition in the Canadian Low Arctic
Increasing deciduous shrub abundance in the Arctic could alter the biotic and abiotic controls on carbon (C) cycling in these ecosystems. Betula glandulosa leaf litter was decomposed at three sites of differing shrub abundance in the Canadian Low Arctic for one year. Summer and winter microclimate a...
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ftcarletonuniv:oai:curve.carleton.ca:28660 2023-05-15T14:49:39+02:00 The impacts of shrub abundance on microclimate and decomposition in the Canadian Low Arctic Skaarup, Electra 2017 https://curve.carleton.ca/3493c45b-e81f-42fa-a0b5-3daccb5f9e9d http://catalogue.library.carleton.ca/record=b4429575 https://doi.org/10.22215/etd/2017-12074 unknown https://curve.carleton.ca/3493c45b-e81f-42fa-a0b5-3daccb5f9e9d http://catalogue.library.carleton.ca/record=b4429575 https://doi.org/10.22215/etd/2017-12074 Thesis/Dissertation 2017 ftcarletonuniv https://doi.org/10.22215/etd/2017-12074 2022-01-23T08:15:18Z Increasing deciduous shrub abundance in the Arctic could alter the biotic and abiotic controls on carbon (C) cycling in these ecosystems. Betula glandulosa leaf litter was decomposed at three sites of differing shrub abundance in the Canadian Low Arctic for one year. Summer and winter microclimate along with soil nutrients were monitored and lab incubations simulated autumn temperatures and leaching conditions. At the high shrub site, warmer winter soil temperatures contrasted with cooler summer temperatures likely due to deeper snow and greater thickness of moss and organic soil layers compared to the other sites. However, surface mass loss was significantly higher at the shrubbier site only after a full year suggesting that microclimate was not the only influencing factor. At all sites, large mass losses (21-26%) occurred between August and May with no significant differences among sites. The laboratory study suggested that much of the mass loss occurred shortly after litterfall in autumn. Thesis Arctic CURVE - Carleton University Research Virtual Environment Arctic |
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Open Polar |
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CURVE - Carleton University Research Virtual Environment |
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ftcarletonuniv |
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unknown |
description |
Increasing deciduous shrub abundance in the Arctic could alter the biotic and abiotic controls on carbon (C) cycling in these ecosystems. Betula glandulosa leaf litter was decomposed at three sites of differing shrub abundance in the Canadian Low Arctic for one year. Summer and winter microclimate along with soil nutrients were monitored and lab incubations simulated autumn temperatures and leaching conditions. At the high shrub site, warmer winter soil temperatures contrasted with cooler summer temperatures likely due to deeper snow and greater thickness of moss and organic soil layers compared to the other sites. However, surface mass loss was significantly higher at the shrubbier site only after a full year suggesting that microclimate was not the only influencing factor. At all sites, large mass losses (21-26%) occurred between August and May with no significant differences among sites. The laboratory study suggested that much of the mass loss occurred shortly after litterfall in autumn. |
format |
Thesis |
author |
Skaarup, Electra |
spellingShingle |
Skaarup, Electra The impacts of shrub abundance on microclimate and decomposition in the Canadian Low Arctic |
author_facet |
Skaarup, Electra |
author_sort |
Skaarup, Electra |
title |
The impacts of shrub abundance on microclimate and decomposition in the Canadian Low Arctic |
title_short |
The impacts of shrub abundance on microclimate and decomposition in the Canadian Low Arctic |
title_full |
The impacts of shrub abundance on microclimate and decomposition in the Canadian Low Arctic |
title_fullStr |
The impacts of shrub abundance on microclimate and decomposition in the Canadian Low Arctic |
title_full_unstemmed |
The impacts of shrub abundance on microclimate and decomposition in the Canadian Low Arctic |
title_sort |
impacts of shrub abundance on microclimate and decomposition in the canadian low arctic |
publishDate |
2017 |
url |
https://curve.carleton.ca/3493c45b-e81f-42fa-a0b5-3daccb5f9e9d http://catalogue.library.carleton.ca/record=b4429575 https://doi.org/10.22215/etd/2017-12074 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_relation |
https://curve.carleton.ca/3493c45b-e81f-42fa-a0b5-3daccb5f9e9d http://catalogue.library.carleton.ca/record=b4429575 https://doi.org/10.22215/etd/2017-12074 |
op_doi |
https://doi.org/10.22215/etd/2017-12074 |
_version_ |
1766320731049689088 |