DataSheet_1_Alder Distribution and Expansion Across a Tundra Hillslope: Implications for Local N Cycling.pdf
Increases in the availability of nitrogen (N) may have consequences for plant growth and nutrient cycling in N-limited tundra plant communities. We investigated the impact alder (Alnus viridis spp. fruticosa), an N-fixing deciduous shrub, has on tundra N cycling at a hillslope located on Alaska’s Se...
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ftfrontimediafig:oai:figshare.com:article/9989387 2023-05-15T15:18:31+02:00 DataSheet_1_Alder Distribution and Expansion Across a Tundra Hillslope: Implications for Local N Cycling.pdf Verity G. Salmon Amy L. Breen Jitendra Kumar Mark J. Lara Peter E. Thornton Stan D. Wullschleger Colleen M. Iversen 2019-10-16T14:24:48Z https://doi.org/10.3389/fpls.2019.01099.s001 https://figshare.com/articles/DataSheet_1_Alder_Distribution_and_Expansion_Across_a_Tundra_Hillslope_Implications_for_Local_N_Cycling_pdf/9989387 unknown doi:10.3389/fpls.2019.01099.s001 https://figshare.com/articles/DataSheet_1_Alder_Distribution_and_Expansion_Across_a_Tundra_Hillslope_Implications_for_Local_N_Cycling_pdf/9989387 CC BY 4.0 CC-BY Botany Plant Biology Plant Systematics and Taxonomy Plant Cell and Molecular Biology Plant Developmental and Reproductive Biology Plant Pathology Plant Physiology Plant Biology not elsewhere classified Alnus (alder) arctic nitrogen cycling nitrogen fixation shrub encroachment tundra tundra greening nutrient limitation Dataset 2019 ftfrontimediafig https://doi.org/10.3389/fpls.2019.01099.s001 2019-10-16T22:48:53Z Increases in the availability of nitrogen (N) may have consequences for plant growth and nutrient cycling in N-limited tundra plant communities. We investigated the impact alder (Alnus viridis spp. fruticosa), an N-fixing deciduous shrub, has on tundra N cycling at a hillslope located on Alaska’s Seward Peninsula. We quantified N fixation using 15 N 2 incubations within two distinct alder communities at this site: alder shrublands located on well-drained, rocky outcroppings in the uplands and alder savannas located in water tracks along the moist toeslope of the hill. Annual N fixation rates in alder shrublands were 1.95 ± 0.68 g N m -2 year -1 , leading to elevated N levels in adjacent soils and plants. Alder savannas had lower N fixation rates (0.53 ± 0.19 g N m -2 year -1 ), perhaps due to low phosphorus availability and poor drainage in these highly organic soil profiles underlain by permafrost. In addition to supporting higher rates of N fixation, tall-statured alder shrublands had different foliar traits than relatively short-statured alder in savannas, providing an opportunity to link N fixation to remotely-sensed variables. We were able to generate a map of the alder shrubland distribution at this site using a multi-sensor fusion approach. The change in alder shrubland distribution through time was also determined from historic aerial and satellite imagery. Analysis of historic imagery showed that the area of alder shrublands at this site has increased by 40% from 1956 to 2014. We estimate this increase in alder shrublands was associated with a 22% increase in N fixation. Our results suggest that expansion of alder shrublands has the potential to substantially alter N cycling, increase plant productivity, and redistribute C storage in upland tundra regions. An improved understanding of the consequences of N fixation within N-limited tundra plant communities will therefore be crucial for predicting the biogeochemistry of these warming ecosystems. Dataset Arctic permafrost Seward Peninsula Tundra Frontiers: Figshare Arctic |
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Open Polar |
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Frontiers: Figshare |
op_collection_id |
ftfrontimediafig |
language |
unknown |
topic |
Botany Plant Biology Plant Systematics and Taxonomy Plant Cell and Molecular Biology Plant Developmental and Reproductive Biology Plant Pathology Plant Physiology Plant Biology not elsewhere classified Alnus (alder) arctic nitrogen cycling nitrogen fixation shrub encroachment tundra tundra greening nutrient limitation |
spellingShingle |
Botany Plant Biology Plant Systematics and Taxonomy Plant Cell and Molecular Biology Plant Developmental and Reproductive Biology Plant Pathology Plant Physiology Plant Biology not elsewhere classified Alnus (alder) arctic nitrogen cycling nitrogen fixation shrub encroachment tundra tundra greening nutrient limitation Verity G. Salmon Amy L. Breen Jitendra Kumar Mark J. Lara Peter E. Thornton Stan D. Wullschleger Colleen M. Iversen DataSheet_1_Alder Distribution and Expansion Across a Tundra Hillslope: Implications for Local N Cycling.pdf |
topic_facet |
Botany Plant Biology Plant Systematics and Taxonomy Plant Cell and Molecular Biology Plant Developmental and Reproductive Biology Plant Pathology Plant Physiology Plant Biology not elsewhere classified Alnus (alder) arctic nitrogen cycling nitrogen fixation shrub encroachment tundra tundra greening nutrient limitation |
description |
Increases in the availability of nitrogen (N) may have consequences for plant growth and nutrient cycling in N-limited tundra plant communities. We investigated the impact alder (Alnus viridis spp. fruticosa), an N-fixing deciduous shrub, has on tundra N cycling at a hillslope located on Alaska’s Seward Peninsula. We quantified N fixation using 15 N 2 incubations within two distinct alder communities at this site: alder shrublands located on well-drained, rocky outcroppings in the uplands and alder savannas located in water tracks along the moist toeslope of the hill. Annual N fixation rates in alder shrublands were 1.95 ± 0.68 g N m -2 year -1 , leading to elevated N levels in adjacent soils and plants. Alder savannas had lower N fixation rates (0.53 ± 0.19 g N m -2 year -1 ), perhaps due to low phosphorus availability and poor drainage in these highly organic soil profiles underlain by permafrost. In addition to supporting higher rates of N fixation, tall-statured alder shrublands had different foliar traits than relatively short-statured alder in savannas, providing an opportunity to link N fixation to remotely-sensed variables. We were able to generate a map of the alder shrubland distribution at this site using a multi-sensor fusion approach. The change in alder shrubland distribution through time was also determined from historic aerial and satellite imagery. Analysis of historic imagery showed that the area of alder shrublands at this site has increased by 40% from 1956 to 2014. We estimate this increase in alder shrublands was associated with a 22% increase in N fixation. Our results suggest that expansion of alder shrublands has the potential to substantially alter N cycling, increase plant productivity, and redistribute C storage in upland tundra regions. An improved understanding of the consequences of N fixation within N-limited tundra plant communities will therefore be crucial for predicting the biogeochemistry of these warming ecosystems. |
format |
Dataset |
author |
Verity G. Salmon Amy L. Breen Jitendra Kumar Mark J. Lara Peter E. Thornton Stan D. Wullschleger Colleen M. Iversen |
author_facet |
Verity G. Salmon Amy L. Breen Jitendra Kumar Mark J. Lara Peter E. Thornton Stan D. Wullschleger Colleen M. Iversen |
author_sort |
Verity G. Salmon |
title |
DataSheet_1_Alder Distribution and Expansion Across a Tundra Hillslope: Implications for Local N Cycling.pdf |
title_short |
DataSheet_1_Alder Distribution and Expansion Across a Tundra Hillslope: Implications for Local N Cycling.pdf |
title_full |
DataSheet_1_Alder Distribution and Expansion Across a Tundra Hillslope: Implications for Local N Cycling.pdf |
title_fullStr |
DataSheet_1_Alder Distribution and Expansion Across a Tundra Hillslope: Implications for Local N Cycling.pdf |
title_full_unstemmed |
DataSheet_1_Alder Distribution and Expansion Across a Tundra Hillslope: Implications for Local N Cycling.pdf |
title_sort |
datasheet_1_alder distribution and expansion across a tundra hillslope: implications for local n cycling.pdf |
publishDate |
2019 |
url |
https://doi.org/10.3389/fpls.2019.01099.s001 https://figshare.com/articles/DataSheet_1_Alder_Distribution_and_Expansion_Across_a_Tundra_Hillslope_Implications_for_Local_N_Cycling_pdf/9989387 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic permafrost Seward Peninsula Tundra |
genre_facet |
Arctic permafrost Seward Peninsula Tundra |
op_relation |
doi:10.3389/fpls.2019.01099.s001 https://figshare.com/articles/DataSheet_1_Alder_Distribution_and_Expansion_Across_a_Tundra_Hillslope_Implications_for_Local_N_Cycling_pdf/9989387 |
op_rights |
CC BY 4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.3389/fpls.2019.01099.s001 |
_version_ |
1766348704709607424 |