Data from: Grazing decreases N partitioning among coexisting plant species
1. Herbivores play a key role in shaping ecosystem structure and functions by influencing plant and microbial community composition and nutrient cycling. 2. This study investigated the long-term effects of herbivores on plant resource acquisition. We explored differences in the natural δ15N signatur...
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ftzenodo:oai:zenodo.org:4962768 2023-05-15T15:16:34+02:00 Data from: Grazing decreases N partitioning among coexisting plant species Barthelemy, Hélène Stark, Sari Kytoviita, Minna-Maarit Olofsson, Johan 2018-05-30 https://zenodo.org/record/4962768 https://doi.org/10.5061/dryad.78084 unknown doi:10.1111/1365-2435.12917 https://zenodo.org/communities/dryad https://zenodo.org/record/4962768 https://doi.org/10.5061/dryad.78084 oai:zenodo.org:4962768 info:eu-repo/semantics/openAccess https://creativecommons.org/publicdomain/zero/1.0/legalcode Above- belowground linkages Arctic tundra Ungulate Grazing Microbial N biomass Plant nutrient uptake info:eu-repo/semantics/other dataset 2018 ftzenodo https://doi.org/10.5061/dryad.7808410.1111/1365-2435.12917 2023-03-10T15:46:51Z 1. Herbivores play a key role in shaping ecosystem structure and functions by influencing plant and microbial community composition and nutrient cycling. 2. This study investigated the long-term effects of herbivores on plant resource acquisition. We explored differences in the natural δ15N signatures in plant, microbial and soil N pools, and examined mycorrhizal colonization in two tundra sites that have been either lightly or heavily grazed by reindeer for more than 50 years. The study examined changes in nutrient acquisition in five common tundra plants with contrasting traits and mycorrhiza status; the mycorrhizal dwarf shrubs, Betula nana, Vaccinium myrtillus and Empetrum hermaphroditum; a mycorrhizal grass, Deschampsia flexuosa, and a non-mycorrhizal sedge, Carex bigelowii. 3. There were large variations in δ15N among coexisting plant species in the lightly grazed sites. This variation was dramatically reduced in the heavily grazed sites. At an individual species level, δ15N was higher in E. hermaphroditum and lower in C. bigelowii in the heavily grazed sites. Mycorrhizal colonization in B. nana and E. hermaphroditum roots were also lower in the heavily grazed sites. The δ15N signatures of the total soil N pool and of the microbial N pools were higher in the heavily grazed sites. 4. Since the strong δ15N differentiation among plant species has been interpreted as a result of plants with different mycorrhizal types using different sources of soil nitrogen, we suggest that the lower variation in δ15N in heavily grazed sites indicates a lower niche differentiation in nitrogen uptake among plants. Reduced mycorrhiza-mediated nitrogen uptake by some of the species, a shift towards a more mineral nutrition due to higher nutrient turnover, and uptake of labile nitrogen from dung and urine in the heavily grazed sites could all contribute to the changes in plant δ15N. 5. We conclude that herbivores have the potential to influence plant nutrient uptake and provide the first data suggesting that herbivores decrease ... Dataset Arctic Betula nana Carex bigelowii Tundra Zenodo Arctic |
institution |
Open Polar |
collection |
Zenodo |
op_collection_id |
ftzenodo |
language |
unknown |
topic |
Above- belowground linkages Arctic tundra Ungulate Grazing Microbial N biomass Plant nutrient uptake |
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Above- belowground linkages Arctic tundra Ungulate Grazing Microbial N biomass Plant nutrient uptake Barthelemy, Hélène Stark, Sari Kytoviita, Minna-Maarit Olofsson, Johan Data from: Grazing decreases N partitioning among coexisting plant species |
topic_facet |
Above- belowground linkages Arctic tundra Ungulate Grazing Microbial N biomass Plant nutrient uptake |
description |
1. Herbivores play a key role in shaping ecosystem structure and functions by influencing plant and microbial community composition and nutrient cycling. 2. This study investigated the long-term effects of herbivores on plant resource acquisition. We explored differences in the natural δ15N signatures in plant, microbial and soil N pools, and examined mycorrhizal colonization in two tundra sites that have been either lightly or heavily grazed by reindeer for more than 50 years. The study examined changes in nutrient acquisition in five common tundra plants with contrasting traits and mycorrhiza status; the mycorrhizal dwarf shrubs, Betula nana, Vaccinium myrtillus and Empetrum hermaphroditum; a mycorrhizal grass, Deschampsia flexuosa, and a non-mycorrhizal sedge, Carex bigelowii. 3. There were large variations in δ15N among coexisting plant species in the lightly grazed sites. This variation was dramatically reduced in the heavily grazed sites. At an individual species level, δ15N was higher in E. hermaphroditum and lower in C. bigelowii in the heavily grazed sites. Mycorrhizal colonization in B. nana and E. hermaphroditum roots were also lower in the heavily grazed sites. The δ15N signatures of the total soil N pool and of the microbial N pools were higher in the heavily grazed sites. 4. Since the strong δ15N differentiation among plant species has been interpreted as a result of plants with different mycorrhizal types using different sources of soil nitrogen, we suggest that the lower variation in δ15N in heavily grazed sites indicates a lower niche differentiation in nitrogen uptake among plants. Reduced mycorrhiza-mediated nitrogen uptake by some of the species, a shift towards a more mineral nutrition due to higher nutrient turnover, and uptake of labile nitrogen from dung and urine in the heavily grazed sites could all contribute to the changes in plant δ15N. 5. We conclude that herbivores have the potential to influence plant nutrient uptake and provide the first data suggesting that herbivores decrease ... |
format |
Dataset |
author |
Barthelemy, Hélène Stark, Sari Kytoviita, Minna-Maarit Olofsson, Johan |
author_facet |
Barthelemy, Hélène Stark, Sari Kytoviita, Minna-Maarit Olofsson, Johan |
author_sort |
Barthelemy, Hélène |
title |
Data from: Grazing decreases N partitioning among coexisting plant species |
title_short |
Data from: Grazing decreases N partitioning among coexisting plant species |
title_full |
Data from: Grazing decreases N partitioning among coexisting plant species |
title_fullStr |
Data from: Grazing decreases N partitioning among coexisting plant species |
title_full_unstemmed |
Data from: Grazing decreases N partitioning among coexisting plant species |
title_sort |
data from: grazing decreases n partitioning among coexisting plant species |
publishDate |
2018 |
url |
https://zenodo.org/record/4962768 https://doi.org/10.5061/dryad.78084 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Betula nana Carex bigelowii Tundra |
genre_facet |
Arctic Betula nana Carex bigelowii Tundra |
op_relation |
doi:10.1111/1365-2435.12917 https://zenodo.org/communities/dryad https://zenodo.org/record/4962768 https://doi.org/10.5061/dryad.78084 oai:zenodo.org:4962768 |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/publicdomain/zero/1.0/legalcode |
op_doi |
https://doi.org/10.5061/dryad.7808410.1111/1365-2435.12917 |
_version_ |
1766346863438462976 |