Arctic aquatic graminoid tundra responses to nutrient availability
Unraveling the environmental controls influencing Arctic tundra productivity is paramount for advancing our predictive understanding of the causes and consequences of warming in tundra ecosystems and associated land–atmosphere feedbacks. This study focuses on aquatic emergent tundra plants, which do...
Published in: | Biogeosciences |
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Copernicus Publications
2021
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00056399 2024-09-15T17:54:38+00:00 Arctic aquatic graminoid tundra responses to nutrient availability Andresen, Christian G. Lougheed, Vanessa L. 2021-04 electronic https://doi.org/10.5194/bg-18-2649-2021 https://noa.gwlb.de/receive/cop_mods_00056399 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00056050/bg-18-2649-2021.pdf https://bg.copernicus.org/articles/18/2649/2021/bg-18-2649-2021.pdf eng eng Copernicus Publications Biogeosciences -- http://www.bibliothek.uni-regensburg.de/ezeit/?2158181 -- http://www.copernicus.org/EGU/bg/bg.html -- 1726-4189 https://doi.org/10.5194/bg-18-2649-2021 https://noa.gwlb.de/receive/cop_mods_00056399 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00056050/bg-18-2649-2021.pdf https://bg.copernicus.org/articles/18/2649/2021/bg-18-2649-2021.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2021 ftnonlinearchiv https://doi.org/10.5194/bg-18-2649-2021 2024-06-26T04:40:00Z Unraveling the environmental controls influencing Arctic tundra productivity is paramount for advancing our predictive understanding of the causes and consequences of warming in tundra ecosystems and associated land–atmosphere feedbacks. This study focuses on aquatic emergent tundra plants, which dominate productivity and methane fluxes in the Arctic coastal plain of Alaska. In particular, we assessed how environmental nutrient availability influences production of biomass and greenness in the dominant aquatic tundra species: Arctophila fulva and Carex aquatilis. We sampled a total of 17 sites distributed across the Barrow Peninsula and Atqasuk, Alaska, following a nutrient gradient that ranged from sites with thermokarst slumping or urban runoff to sites with relatively low nutrient inputs. Employing a multivariate analysis, we explained the relationship of soil and water nutrients to plant leaf macro- and micro-nutrients. Specifically, we identified soil phosphorus as the main limiting nutrient factor given that it was the principal driver of aboveground biomass (R2=0.34, p=0.002) and normalized difference vegetation index (NDVI) (R2=0.47, p=0.002) in both species. Plot-level spectral NDVI was a good predictor of leaf P content for both species. We found long-term increases in N, P and Ca in C. aquatilis based on historical leaf nutrient data from the 1970s of our study area. This study highlights the importance of nutrient pools and mobilization between terrestrial–aquatic systems and their potential influence on productivity and land–atmosphere carbon balance. In addition, aquatic plant NDVI spectral responses to nutrients can serve as landscape hot-spot and hot-moment indicators of landscape biogeochemical heterogeneity associated with permafrost degradation, nutrient leaching and availability. Article in Journal/Newspaper Arctophila fulva Barrow Carex aquatilis permafrost Thermokarst Tundra Alaska Niedersächsisches Online-Archiv NOA Biogeosciences 18 8 2649 2662 |
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English |
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article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Andresen, Christian G. Lougheed, Vanessa L. Arctic aquatic graminoid tundra responses to nutrient availability |
topic_facet |
article Verlagsveröffentlichung |
description |
Unraveling the environmental controls influencing Arctic tundra productivity is paramount for advancing our predictive understanding of the causes and consequences of warming in tundra ecosystems and associated land–atmosphere feedbacks. This study focuses on aquatic emergent tundra plants, which dominate productivity and methane fluxes in the Arctic coastal plain of Alaska. In particular, we assessed how environmental nutrient availability influences production of biomass and greenness in the dominant aquatic tundra species: Arctophila fulva and Carex aquatilis. We sampled a total of 17 sites distributed across the Barrow Peninsula and Atqasuk, Alaska, following a nutrient gradient that ranged from sites with thermokarst slumping or urban runoff to sites with relatively low nutrient inputs. Employing a multivariate analysis, we explained the relationship of soil and water nutrients to plant leaf macro- and micro-nutrients. Specifically, we identified soil phosphorus as the main limiting nutrient factor given that it was the principal driver of aboveground biomass (R2=0.34, p=0.002) and normalized difference vegetation index (NDVI) (R2=0.47, p=0.002) in both species. Plot-level spectral NDVI was a good predictor of leaf P content for both species. We found long-term increases in N, P and Ca in C. aquatilis based on historical leaf nutrient data from the 1970s of our study area. This study highlights the importance of nutrient pools and mobilization between terrestrial–aquatic systems and their potential influence on productivity and land–atmosphere carbon balance. In addition, aquatic plant NDVI spectral responses to nutrients can serve as landscape hot-spot and hot-moment indicators of landscape biogeochemical heterogeneity associated with permafrost degradation, nutrient leaching and availability. |
format |
Article in Journal/Newspaper |
author |
Andresen, Christian G. Lougheed, Vanessa L. |
author_facet |
Andresen, Christian G. Lougheed, Vanessa L. |
author_sort |
Andresen, Christian G. |
title |
Arctic aquatic graminoid tundra responses to nutrient availability |
title_short |
Arctic aquatic graminoid tundra responses to nutrient availability |
title_full |
Arctic aquatic graminoid tundra responses to nutrient availability |
title_fullStr |
Arctic aquatic graminoid tundra responses to nutrient availability |
title_full_unstemmed |
Arctic aquatic graminoid tundra responses to nutrient availability |
title_sort |
arctic aquatic graminoid tundra responses to nutrient availability |
publisher |
Copernicus Publications |
publishDate |
2021 |
url |
https://doi.org/10.5194/bg-18-2649-2021 https://noa.gwlb.de/receive/cop_mods_00056399 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00056050/bg-18-2649-2021.pdf https://bg.copernicus.org/articles/18/2649/2021/bg-18-2649-2021.pdf |
genre |
Arctophila fulva Barrow Carex aquatilis permafrost Thermokarst Tundra Alaska |
genre_facet |
Arctophila fulva Barrow Carex aquatilis permafrost Thermokarst Tundra Alaska |
op_relation |
Biogeosciences -- http://www.bibliothek.uni-regensburg.de/ezeit/?2158181 -- http://www.copernicus.org/EGU/bg/bg.html -- 1726-4189 https://doi.org/10.5194/bg-18-2649-2021 https://noa.gwlb.de/receive/cop_mods_00056399 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00056050/bg-18-2649-2021.pdf https://bg.copernicus.org/articles/18/2649/2021/bg-18-2649-2021.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/bg-18-2649-2021 |
container_title |
Biogeosciences |
container_volume |
18 |
container_issue |
8 |
container_start_page |
2649 |
op_container_end_page |
2662 |
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1810430976240648192 |