Soils beneath different arctic shrubs have contrasting responses to a natural gradient in temperature
Shrubs commonly form islands of fertility and are expanding their distribution and dominance in the arctic due to climate change, yet how soil properties may be influenced when different species of shrubs expand under warmer climates remains less explored. Important plant traits, such as their assoc...
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Online Access: | http://www.osti.gov/servlets/purl/1501395 https://www.osti.gov/biblio/1501395 https://doi.org/10.1002/ecs2.2290 |
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ftosti:oai:osti.gov:1501395 2023-07-30T04:00:53+02:00 Soils beneath different arctic shrubs have contrasting responses to a natural gradient in temperature Zhao, Qiong Sundqvist, Maja K. Newman, Gregory S. Classen, Aimée T. 2019-04-01 application/pdf http://www.osti.gov/servlets/purl/1501395 https://www.osti.gov/biblio/1501395 https://doi.org/10.1002/ecs2.2290 unknown http://www.osti.gov/servlets/purl/1501395 https://www.osti.gov/biblio/1501395 https://doi.org/10.1002/ecs2.2290 doi:10.1002/ecs2.2290 59 BASIC BIOLOGICAL SCIENCES 2019 ftosti https://doi.org/10.1002/ecs2.2290 2023-07-11T09:31:59Z Shrubs commonly form islands of fertility and are expanding their distribution and dominance in the arctic due to climate change, yet how soil properties may be influenced when different species of shrubs expand under warmer climates remains less explored. Important plant traits, such as their associated root community, are linked to functionally different and dominant shrub species in the arctic and these traits likely shape biogeochemical cycling in areas of shrub expansion. Using an elevational gradient as a proxy for warming, we explored how biochemical processes beneath two important arctic shrubs varied under warmer (low elevation) and cooler (high elevation) climates. Interestingly, the influence of elevation on biogeochemistry varied between the two shrubs. At the low elevation, Betula nana L., an ectomycorrhizal shrub, had high carbon (C) degrading enzyme activities, and relatively low potential net nitrogen (N) mineralization rates. Conversely, , Empetrum nigrum ssp. hermaphroditum Hagerup, an ericoid mycorrhizal dwarf-shrub, had higher enzyme activities and net N immobilization rates at the higher eleva-tion. Further, E. nigrum ssp. hermpahroditum appeared to have a more closed C and nutrient cycle than B. nana —enzymes degrading C, N, and phosphorus were tightly correlated with each other and with total C and ammonium concentrations in the humus beneath E. nigrum ssp. hermaphroditum , but not beneath B. nana . Thus, our results suggest differences in the warming responses of C and N cycling beneath shrub species across an arctic tundra landscape. Other/Unknown Material Arctic Betula nana Climate change Empetrum nigrum Tundra SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) Arctic Ecosphere 9 6 |
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SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) |
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ftosti |
language |
unknown |
topic |
59 BASIC BIOLOGICAL SCIENCES |
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59 BASIC BIOLOGICAL SCIENCES Zhao, Qiong Sundqvist, Maja K. Newman, Gregory S. Classen, Aimée T. Soils beneath different arctic shrubs have contrasting responses to a natural gradient in temperature |
topic_facet |
59 BASIC BIOLOGICAL SCIENCES |
description |
Shrubs commonly form islands of fertility and are expanding their distribution and dominance in the arctic due to climate change, yet how soil properties may be influenced when different species of shrubs expand under warmer climates remains less explored. Important plant traits, such as their associated root community, are linked to functionally different and dominant shrub species in the arctic and these traits likely shape biogeochemical cycling in areas of shrub expansion. Using an elevational gradient as a proxy for warming, we explored how biochemical processes beneath two important arctic shrubs varied under warmer (low elevation) and cooler (high elevation) climates. Interestingly, the influence of elevation on biogeochemistry varied between the two shrubs. At the low elevation, Betula nana L., an ectomycorrhizal shrub, had high carbon (C) degrading enzyme activities, and relatively low potential net nitrogen (N) mineralization rates. Conversely, , Empetrum nigrum ssp. hermaphroditum Hagerup, an ericoid mycorrhizal dwarf-shrub, had higher enzyme activities and net N immobilization rates at the higher eleva-tion. Further, E. nigrum ssp. hermpahroditum appeared to have a more closed C and nutrient cycle than B. nana —enzymes degrading C, N, and phosphorus were tightly correlated with each other and with total C and ammonium concentrations in the humus beneath E. nigrum ssp. hermaphroditum , but not beneath B. nana . Thus, our results suggest differences in the warming responses of C and N cycling beneath shrub species across an arctic tundra landscape. |
author |
Zhao, Qiong Sundqvist, Maja K. Newman, Gregory S. Classen, Aimée T. |
author_facet |
Zhao, Qiong Sundqvist, Maja K. Newman, Gregory S. Classen, Aimée T. |
author_sort |
Zhao, Qiong |
title |
Soils beneath different arctic shrubs have contrasting responses to a natural gradient in temperature |
title_short |
Soils beneath different arctic shrubs have contrasting responses to a natural gradient in temperature |
title_full |
Soils beneath different arctic shrubs have contrasting responses to a natural gradient in temperature |
title_fullStr |
Soils beneath different arctic shrubs have contrasting responses to a natural gradient in temperature |
title_full_unstemmed |
Soils beneath different arctic shrubs have contrasting responses to a natural gradient in temperature |
title_sort |
soils beneath different arctic shrubs have contrasting responses to a natural gradient in temperature |
publishDate |
2019 |
url |
http://www.osti.gov/servlets/purl/1501395 https://www.osti.gov/biblio/1501395 https://doi.org/10.1002/ecs2.2290 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Betula nana Climate change Empetrum nigrum Tundra |
genre_facet |
Arctic Betula nana Climate change Empetrum nigrum Tundra |
op_relation |
http://www.osti.gov/servlets/purl/1501395 https://www.osti.gov/biblio/1501395 https://doi.org/10.1002/ecs2.2290 doi:10.1002/ecs2.2290 |
op_doi |
https://doi.org/10.1002/ecs2.2290 |
container_title |
Ecosphere |
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9 |
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6 |
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1772811576026333184 |