Short- and long-term plant and microbial uptake of 15 N-labelled urea in a mesic tundra heath, West Greenland
Terrestrial animals are key elements in the cycling of elements in the Arctic where nutrient availability is low. Waste production by herbivores, in particular urine deposition, has a crucial role for nitrogen (N) recycling, still, it remains largely unexplored. Also, experimental evidence is biased...
Published in: | Polar Biology |
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Language: | English |
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2024
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Online Access: | https://curis.ku.dk/portal/da/publications/short-and-longterm-plant-and-microbial-uptake-of-15nlabelled-urea-in-a-mesic-tundra-heath-west-greenland(6c2a6353-98ea-4466-96cf-ea6880259c4c).html https://doi.org/10.1007/s00300-023-03209-6 https://curis.ku.dk/ws/files/379169253/s00300_023_03209_6_1_.pdf |
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ftcopenhagenunip:oai:pure.atira.dk:publications/6c2a6353-98ea-4466-96cf-ea6880259c4c 2024-04-14T08:06:48+00:00 Short- and long-term plant and microbial uptake of 15 N-labelled urea in a mesic tundra heath, West Greenland Barthelemy, Hélène Nobel, Liv Alexa Stark, Sari Väisänen, Maria Olofsson, Johan Michelsen, Anders 2024 application/pdf https://curis.ku.dk/portal/da/publications/short-and-longterm-plant-and-microbial-uptake-of-15nlabelled-urea-in-a-mesic-tundra-heath-west-greenland(6c2a6353-98ea-4466-96cf-ea6880259c4c).html https://doi.org/10.1007/s00300-023-03209-6 https://curis.ku.dk/ws/files/379169253/s00300_023_03209_6_1_.pdf eng eng info:eu-repo/semantics/openAccess Barthelemy , H , Nobel , L A , Stark , S , Väisänen , M , Olofsson , J & Michelsen , A 2024 , ' Short- and long-term plant and microbial uptake of 15 N-labelled urea in a mesic tundra heath, West Greenland ' , Polar Biology , vol. 47 , pp. 1-15 . https://doi.org/10.1007/s00300-023-03209-6 N labelling Arctic tundra Ecosystem N retention Microbial N immobilization Plant nitrogen uptake Urine article 2024 ftcopenhagenunip https://doi.org/10.1007/s00300-023-03209-6 2024-03-21T17:28:23Z Terrestrial animals are key elements in the cycling of elements in the Arctic where nutrient availability is low. Waste production by herbivores, in particular urine deposition, has a crucial role for nitrogen (N) recycling, still, it remains largely unexplored. Also, experimental evidence is biased toward short-term studies and Arctic regions under high herbivore pressure. In this study, we aimed to examine the fate of N derived from urine in a nutrient poor tundra heath in West Greenland, with historical low level of herbivory. We performed a pulse labelling with 15N-urea over the plant canopy and explored ecosystem N partition and retention in the short-term (2 weeks and 1 year) and longer-term (5 years). We found that all vascular plants, irrespective of their traits, could rapidly take up N-urea, but mosses and lichens were even more efficient. Total 15N enrichment was severely reduced for all plants 5 years after tracer addition, with the exception of cryptogams, indicating that non-vascular plants constituted a long-term sink of 15N-urea. The 15N recovery was also high in the litter suggesting high N immobilization in this layer, potentially delaying the nutrients from urine entering the soil compartment. Long-term 15N recovery in soil microbial biomass was minimal, but as much as 30% of added 15N remained in the non-microbial fraction after 5 years. Our results demonstrate that tundra plants that have evolved under low herbivory pressure are well adapted to quickly take advantage of labile urea, with urine having only a transient effect on soil nutrient availability. Terrestrial animals are key elements in the cycling of elements in the Arctic where nutrient availability is low. Waste production by herbivores, in particular urine deposition, has a crucial role for nitrogen (N) recycling, still, it remains largely unexplored. Also, experimental evidence is biased toward short-term studies and Arctic regions under high herbivore pressure. In this study, we aimed to examine the fate of N derived from ... Article in Journal/Newspaper Arctic Greenland Polar Biology Tundra University of Copenhagen: Research Arctic Greenland Polar Biology 47 1 1 15 |
institution |
Open Polar |
collection |
University of Copenhagen: Research |
op_collection_id |
ftcopenhagenunip |
language |
English |
topic |
N labelling Arctic tundra Ecosystem N retention Microbial N immobilization Plant nitrogen uptake Urine |
spellingShingle |
N labelling Arctic tundra Ecosystem N retention Microbial N immobilization Plant nitrogen uptake Urine Barthelemy, Hélène Nobel, Liv Alexa Stark, Sari Väisänen, Maria Olofsson, Johan Michelsen, Anders Short- and long-term plant and microbial uptake of 15 N-labelled urea in a mesic tundra heath, West Greenland |
topic_facet |
N labelling Arctic tundra Ecosystem N retention Microbial N immobilization Plant nitrogen uptake Urine |
description |
Terrestrial animals are key elements in the cycling of elements in the Arctic where nutrient availability is low. Waste production by herbivores, in particular urine deposition, has a crucial role for nitrogen (N) recycling, still, it remains largely unexplored. Also, experimental evidence is biased toward short-term studies and Arctic regions under high herbivore pressure. In this study, we aimed to examine the fate of N derived from urine in a nutrient poor tundra heath in West Greenland, with historical low level of herbivory. We performed a pulse labelling with 15N-urea over the plant canopy and explored ecosystem N partition and retention in the short-term (2 weeks and 1 year) and longer-term (5 years). We found that all vascular plants, irrespective of their traits, could rapidly take up N-urea, but mosses and lichens were even more efficient. Total 15N enrichment was severely reduced for all plants 5 years after tracer addition, with the exception of cryptogams, indicating that non-vascular plants constituted a long-term sink of 15N-urea. The 15N recovery was also high in the litter suggesting high N immobilization in this layer, potentially delaying the nutrients from urine entering the soil compartment. Long-term 15N recovery in soil microbial biomass was minimal, but as much as 30% of added 15N remained in the non-microbial fraction after 5 years. Our results demonstrate that tundra plants that have evolved under low herbivory pressure are well adapted to quickly take advantage of labile urea, with urine having only a transient effect on soil nutrient availability. Terrestrial animals are key elements in the cycling of elements in the Arctic where nutrient availability is low. Waste production by herbivores, in particular urine deposition, has a crucial role for nitrogen (N) recycling, still, it remains largely unexplored. Also, experimental evidence is biased toward short-term studies and Arctic regions under high herbivore pressure. In this study, we aimed to examine the fate of N derived from ... |
format |
Article in Journal/Newspaper |
author |
Barthelemy, Hélène Nobel, Liv Alexa Stark, Sari Väisänen, Maria Olofsson, Johan Michelsen, Anders |
author_facet |
Barthelemy, Hélène Nobel, Liv Alexa Stark, Sari Väisänen, Maria Olofsson, Johan Michelsen, Anders |
author_sort |
Barthelemy, Hélène |
title |
Short- and long-term plant and microbial uptake of 15 N-labelled urea in a mesic tundra heath, West Greenland |
title_short |
Short- and long-term plant and microbial uptake of 15 N-labelled urea in a mesic tundra heath, West Greenland |
title_full |
Short- and long-term plant and microbial uptake of 15 N-labelled urea in a mesic tundra heath, West Greenland |
title_fullStr |
Short- and long-term plant and microbial uptake of 15 N-labelled urea in a mesic tundra heath, West Greenland |
title_full_unstemmed |
Short- and long-term plant and microbial uptake of 15 N-labelled urea in a mesic tundra heath, West Greenland |
title_sort |
short- and long-term plant and microbial uptake of 15 n-labelled urea in a mesic tundra heath, west greenland |
publishDate |
2024 |
url |
https://curis.ku.dk/portal/da/publications/short-and-longterm-plant-and-microbial-uptake-of-15nlabelled-urea-in-a-mesic-tundra-heath-west-greenland(6c2a6353-98ea-4466-96cf-ea6880259c4c).html https://doi.org/10.1007/s00300-023-03209-6 https://curis.ku.dk/ws/files/379169253/s00300_023_03209_6_1_.pdf |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic Greenland Polar Biology Tundra |
genre_facet |
Arctic Greenland Polar Biology Tundra |
op_source |
Barthelemy , H , Nobel , L A , Stark , S , Väisänen , M , Olofsson , J & Michelsen , A 2024 , ' Short- and long-term plant and microbial uptake of 15 N-labelled urea in a mesic tundra heath, West Greenland ' , Polar Biology , vol. 47 , pp. 1-15 . https://doi.org/10.1007/s00300-023-03209-6 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1007/s00300-023-03209-6 |
container_title |
Polar Biology |
container_volume |
47 |
container_issue |
1 |
container_start_page |
1 |
op_container_end_page |
15 |
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1796303984439328768 |