Grazing decreases N partitioning among coexisting plant species
Herbivores play a key role in shaping ecosystem structure and functions by influencing plant and microbial community composition and nutrient cycling. This study investigated the long‐term effects of herbivores on plant resource acquisition. We explored differences in the natural δ15N signatures in...
Published in: | Functional Ecology |
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Language: | English |
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Wiley-Blackwell Publishing Ltd.
2017
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Online Access: | http://urn.fi/URN:NBN:fi:jyu-201711034133 |
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ftjyvaeskylaenun:oai:jyx.jyu.fi:123456789/55877 2024-02-04T09:58:39+01:00 Grazing decreases N partitioning among coexisting plant species Barthelemy, Hélène Stark, Sari Kytöviita, Minna-Maarit Olofsson, Johan 2017 2051-2060 application/pdf http://urn.fi/URN:NBN:fi:jyu-201711034133 eng eng Wiley-Blackwell Publishing Ltd. Functional Ecology 0269-8463 11 31 https://doi.org/10.5061/dryad.78084 10.1111/1365-2435.12917 Barthelemy, H., Stark, S., Kytöviita, M.-M., & Olofsson, J. (2017). Grazing decreases N partitioning among coexisting plant species. Functional Ecology , 31 (11), 2051-2060. https://doi.org/10.1111/1365-2435.12917 CONVID_27055285 TUTKAID_74079 URN:NBN:fi:jyu-201711034133 http://urn.fi/URN:NBN:fi:jyu-201711034133 © 2017 The Authors, Functional Ecology, British Ecological Society. This is a final draft version of an article whose final and definitive form has been published by Wiley-Blackwell. Published in this repository with the kind permission of the publisher. openAccess above-belowground linkages arctic tundra microbial N biomass mycorrhizal colonization nutrient cycling plant-herbivore interactions plant nutrient uptake ungulate grazing kasvit tundra ravintoaineet ravinteet ravinnekierto biomassa (teollisuus) article http://purl.org/eprint/type/JournalArticle http://purl.org/coar/resource_type/c_2df8fbb1 acceptedVersion A1 2017 ftjyvaeskylaenun https://doi.org/10.5061/dryad.78084 2024-01-11T00:02:46Z Herbivores play a key role in shaping ecosystem structure and functions by influencing plant and microbial community composition and nutrient cycling. 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. 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. 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. We conclude that herbivores have the potential to influence plant nutrient uptake and provide the first data suggesting that herbivores decrease nutrient ... Article in Journal/Newspaper Arctic Betula nana Carex bigelowii Tundra JYX - Jyväskylä University Digital Archive Arctic Functional Ecology 31 11 2051 2060 |
institution |
Open Polar |
collection |
JYX - Jyväskylä University Digital Archive |
op_collection_id |
ftjyvaeskylaenun |
language |
English |
topic |
above-belowground linkages arctic tundra microbial N biomass mycorrhizal colonization nutrient cycling plant-herbivore interactions plant nutrient uptake ungulate grazing kasvit tundra ravintoaineet ravinteet ravinnekierto biomassa (teollisuus) |
spellingShingle |
above-belowground linkages arctic tundra microbial N biomass mycorrhizal colonization nutrient cycling plant-herbivore interactions plant nutrient uptake ungulate grazing kasvit tundra ravintoaineet ravinteet ravinnekierto biomassa (teollisuus) Barthelemy, Hélène Stark, Sari Kytöviita, Minna-Maarit Olofsson, Johan Grazing decreases N partitioning among coexisting plant species |
topic_facet |
above-belowground linkages arctic tundra microbial N biomass mycorrhizal colonization nutrient cycling plant-herbivore interactions plant nutrient uptake ungulate grazing kasvit tundra ravintoaineet ravinteet ravinnekierto biomassa (teollisuus) |
description |
Herbivores play a key role in shaping ecosystem structure and functions by influencing plant and microbial community composition and nutrient cycling. 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. 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. 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. We conclude that herbivores have the potential to influence plant nutrient uptake and provide the first data suggesting that herbivores decrease nutrient ... |
format |
Article in Journal/Newspaper |
author |
Barthelemy, Hélène Stark, Sari Kytöviita, Minna-Maarit Olofsson, Johan |
author_facet |
Barthelemy, Hélène Stark, Sari Kytöviita, Minna-Maarit Olofsson, Johan |
author_sort |
Barthelemy, Hélène |
title |
Grazing decreases N partitioning among coexisting plant species |
title_short |
Grazing decreases N partitioning among coexisting plant species |
title_full |
Grazing decreases N partitioning among coexisting plant species |
title_fullStr |
Grazing decreases N partitioning among coexisting plant species |
title_full_unstemmed |
Grazing decreases N partitioning among coexisting plant species |
title_sort |
grazing decreases n partitioning among coexisting plant species |
publisher |
Wiley-Blackwell Publishing Ltd. |
publishDate |
2017 |
url |
http://urn.fi/URN:NBN:fi:jyu-201711034133 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Betula nana Carex bigelowii Tundra |
genre_facet |
Arctic Betula nana Carex bigelowii Tundra |
op_relation |
Functional Ecology 0269-8463 11 31 https://doi.org/10.5061/dryad.78084 10.1111/1365-2435.12917 Barthelemy, H., Stark, S., Kytöviita, M.-M., & Olofsson, J. (2017). Grazing decreases N partitioning among coexisting plant species. Functional Ecology , 31 (11), 2051-2060. https://doi.org/10.1111/1365-2435.12917 CONVID_27055285 TUTKAID_74079 URN:NBN:fi:jyu-201711034133 http://urn.fi/URN:NBN:fi:jyu-201711034133 |
op_rights |
© 2017 The Authors, Functional Ecology, British Ecological Society. This is a final draft version of an article whose final and definitive form has been published by Wiley-Blackwell. Published in this repository with the kind permission of the publisher. openAccess |
op_doi |
https://doi.org/10.5061/dryad.78084 |
container_title |
Functional Ecology |
container_volume |
31 |
container_issue |
11 |
container_start_page |
2051 |
op_container_end_page |
2060 |
_version_ |
1789963119164915712 |