Fungal relative abundances from root tips of mycorrhizal shrubs and soils of the permafrost boundary and soil chemistry in tussock and shrub tundra, Eight Mile Lake, Alaska
About 1,700 petagrams (Pg) of organic carbon (C) reside in the permafrost soils and sediments of Arctic and Boreal regions. Because this stock is more than twice the size of the atmospheric C pool, there is considerable interest in understanding how the C balance of permafrost ecosystems will respon...
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Arctic Data Center
2019
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Online Access: | https://doi.org/10.18739/A2TT4FT11 |
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dataone:doi:10.18739/A2TT4FT11 2024-06-03T18:46:41+00:00 Fungal relative abundances from root tips of mycorrhizal shrubs and soils of the permafrost boundary and soil chemistry in tussock and shrub tundra, Eight Mile Lake, Alaska Rebecca Hewitt M. Rae DeVan Irina Lagutina D. Lee Taylor Michelle Mack The experiment was conducted in sub-arctic tundra near Eight Mile Lake (63°52' 42”N, 149°15' 12”W), Alaska where permafrost, vegetation, and ecosystem carbon balance are well studied (Schuur et al., 2007; Vogel et al., 2009; Mauritz et al., 2017). The surface permafrost is relatively warm (-1.0 °C) and thus vulnerable to thaw (Osterkamp & Romanovsky, 1999). Maximum thaw depth has increased by 2.1 cm yr-1 due to surface permafrost degradation (Plaza et al., 2019), and newly thawed permafrost soils have greater inorganic N content than active layer soils (Salmon et al., 2018) near our site. The vegetation is classified as moist acidic tundra and is composed of deeply rooted, non-mycorrhizal graminoids and forbs and moderately rooted deciduous and evergreen ECM and ERM shrubs (Hewitt et al., 2018). Within the graminoid-dominated tussock tundra there are patches of shrub tundra dominated by Betula nana L. ENVELOPE(-149.25,-149.25,63.88,63.88) BEGINDATE: 2015-01-01T00:00:00Z ENDDATE: 2015-01-01T00:00:00Z 2019-01-01T00:00:00Z https://doi.org/10.18739/A2TT4FT11 unknown Arctic Data Center active layer ectomycorrhizal fungi ericoid mycorrhizal fungi fungal internal transcribed spacer moist acidic tundra Alaska Betnan= Betula nana Empnig= Empetrum nigrum formerly Leddec renamed Rhotom= Rhododendron tomentosum Vaculi=Vaccinium uliginosum Vacvit= Vaccinium vitis-idaea Dataset 2019 dataone:urn:node:ARCTIC https://doi.org/10.18739/A2TT4FT11 2024-06-03T18:15:23Z About 1,700 petagrams (Pg) of organic carbon (C) reside in the permafrost soils and sediments of Arctic and Boreal regions. Because this stock is more than twice the size of the atmospheric C pool, there is considerable interest in understanding how the C balance of permafrost ecosystems will respond to observed and predicted climate warming. As permafrost soils thaw, organic matter that has been cryogenically protected for hundreds to thousands of years is exposed to microbial decomposition and released to the atmosphere as greenhouse gases. One key factor that may strongly influence C balance in these ecosystems is the concurrent release of nitrogen (N), the element most likely to limit plant productivity. Release of N at or after thaw could increase plant N availability, stimulate plant C uptake and offset or balance permafrost C emissions. Although scientists acknowledge the key role N is likely to play in the permafrost C feedback to climate, there have been few empirical studies of the factors that control its fate in warming permafrost ecosystems. The objective of this project is to develop a mechanistic understanding of the role of permafrost N in the C balance of Alaskan tundra landscapes underlain by permafrost soils. The project focuses on plant acquisition of permafrost N because in most N-limited terrestrial ecosystems, plant uptake is the dominant fate of N released by microbial processes. Plants depend on fungal partners to access N beyond the reach of roots, so this research will also focus on plant mycorrhizal status and fungal community composition to elucidate the role fungal symbionts play in plant N acquisition. This dataset includes 1) relative abundaces of fungal taxa sampled from the root tips of mycorrhizal shrubs by depth in the active layer and soils at the permafrost thaw boundary and 2) soil chemistry matched with the closest fungal depth increment in tussock and shrub tundra at Eight Mile Lake, Alaska. Fungal sequences of the Internal Transcribed Spacer (ITS2) region are archived under GenBank accession MN151409-MN152926. Dataset Arctic Betula nana Empetrum nigrum permafrost Tundra Alaska Arctic Data Center (via DataONE) Arctic ENVELOPE(-149.25,-149.25,63.88,63.88) |
institution |
Open Polar |
collection |
Arctic Data Center (via DataONE) |
op_collection_id |
dataone:urn:node:ARCTIC |
language |
unknown |
topic |
active layer ectomycorrhizal fungi ericoid mycorrhizal fungi fungal internal transcribed spacer moist acidic tundra Alaska Betnan= Betula nana Empnig= Empetrum nigrum formerly Leddec renamed Rhotom= Rhododendron tomentosum Vaculi=Vaccinium uliginosum Vacvit= Vaccinium vitis-idaea |
spellingShingle |
active layer ectomycorrhizal fungi ericoid mycorrhizal fungi fungal internal transcribed spacer moist acidic tundra Alaska Betnan= Betula nana Empnig= Empetrum nigrum formerly Leddec renamed Rhotom= Rhododendron tomentosum Vaculi=Vaccinium uliginosum Vacvit= Vaccinium vitis-idaea Rebecca Hewitt M. Rae DeVan Irina Lagutina D. Lee Taylor Michelle Mack Fungal relative abundances from root tips of mycorrhizal shrubs and soils of the permafrost boundary and soil chemistry in tussock and shrub tundra, Eight Mile Lake, Alaska |
topic_facet |
active layer ectomycorrhizal fungi ericoid mycorrhizal fungi fungal internal transcribed spacer moist acidic tundra Alaska Betnan= Betula nana Empnig= Empetrum nigrum formerly Leddec renamed Rhotom= Rhododendron tomentosum Vaculi=Vaccinium uliginosum Vacvit= Vaccinium vitis-idaea |
description |
About 1,700 petagrams (Pg) of organic carbon (C) reside in the permafrost soils and sediments of Arctic and Boreal regions. Because this stock is more than twice the size of the atmospheric C pool, there is considerable interest in understanding how the C balance of permafrost ecosystems will respond to observed and predicted climate warming. As permafrost soils thaw, organic matter that has been cryogenically protected for hundreds to thousands of years is exposed to microbial decomposition and released to the atmosphere as greenhouse gases. One key factor that may strongly influence C balance in these ecosystems is the concurrent release of nitrogen (N), the element most likely to limit plant productivity. Release of N at or after thaw could increase plant N availability, stimulate plant C uptake and offset or balance permafrost C emissions. Although scientists acknowledge the key role N is likely to play in the permafrost C feedback to climate, there have been few empirical studies of the factors that control its fate in warming permafrost ecosystems. The objective of this project is to develop a mechanistic understanding of the role of permafrost N in the C balance of Alaskan tundra landscapes underlain by permafrost soils. The project focuses on plant acquisition of permafrost N because in most N-limited terrestrial ecosystems, plant uptake is the dominant fate of N released by microbial processes. Plants depend on fungal partners to access N beyond the reach of roots, so this research will also focus on plant mycorrhizal status and fungal community composition to elucidate the role fungal symbionts play in plant N acquisition. This dataset includes 1) relative abundaces of fungal taxa sampled from the root tips of mycorrhizal shrubs by depth in the active layer and soils at the permafrost thaw boundary and 2) soil chemistry matched with the closest fungal depth increment in tussock and shrub tundra at Eight Mile Lake, Alaska. Fungal sequences of the Internal Transcribed Spacer (ITS2) region are archived under GenBank accession MN151409-MN152926. |
format |
Dataset |
author |
Rebecca Hewitt M. Rae DeVan Irina Lagutina D. Lee Taylor Michelle Mack |
author_facet |
Rebecca Hewitt M. Rae DeVan Irina Lagutina D. Lee Taylor Michelle Mack |
author_sort |
Rebecca Hewitt |
title |
Fungal relative abundances from root tips of mycorrhizal shrubs and soils of the permafrost boundary and soil chemistry in tussock and shrub tundra, Eight Mile Lake, Alaska |
title_short |
Fungal relative abundances from root tips of mycorrhizal shrubs and soils of the permafrost boundary and soil chemistry in tussock and shrub tundra, Eight Mile Lake, Alaska |
title_full |
Fungal relative abundances from root tips of mycorrhizal shrubs and soils of the permafrost boundary and soil chemistry in tussock and shrub tundra, Eight Mile Lake, Alaska |
title_fullStr |
Fungal relative abundances from root tips of mycorrhizal shrubs and soils of the permafrost boundary and soil chemistry in tussock and shrub tundra, Eight Mile Lake, Alaska |
title_full_unstemmed |
Fungal relative abundances from root tips of mycorrhizal shrubs and soils of the permafrost boundary and soil chemistry in tussock and shrub tundra, Eight Mile Lake, Alaska |
title_sort |
fungal relative abundances from root tips of mycorrhizal shrubs and soils of the permafrost boundary and soil chemistry in tussock and shrub tundra, eight mile lake, alaska |
publisher |
Arctic Data Center |
publishDate |
2019 |
url |
https://doi.org/10.18739/A2TT4FT11 |
op_coverage |
The experiment was conducted in sub-arctic tundra near Eight Mile Lake (63°52' 42”N, 149°15' 12”W), Alaska where permafrost, vegetation, and ecosystem carbon balance are well studied (Schuur et al., 2007; Vogel et al., 2009; Mauritz et al., 2017). The surface permafrost is relatively warm (-1.0 °C) and thus vulnerable to thaw (Osterkamp & Romanovsky, 1999). Maximum thaw depth has increased by 2.1 cm yr-1 due to surface permafrost degradation (Plaza et al., 2019), and newly thawed permafrost soils have greater inorganic N content than active layer soils (Salmon et al., 2018) near our site. The vegetation is classified as moist acidic tundra and is composed of deeply rooted, non-mycorrhizal graminoids and forbs and moderately rooted deciduous and evergreen ECM and ERM shrubs (Hewitt et al., 2018). Within the graminoid-dominated tussock tundra there are patches of shrub tundra dominated by Betula nana L. ENVELOPE(-149.25,-149.25,63.88,63.88) BEGINDATE: 2015-01-01T00:00:00Z ENDDATE: 2015-01-01T00:00:00Z |
long_lat |
ENVELOPE(-149.25,-149.25,63.88,63.88) |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Betula nana Empetrum nigrum permafrost Tundra Alaska |
genre_facet |
Arctic Betula nana Empetrum nigrum permafrost Tundra Alaska |
op_doi |
https://doi.org/10.18739/A2TT4FT11 |
_version_ |
1800869760049610752 |