Strong Interactive Effects of Warming and Insect Herbivory on Soil Carbon and Nitrogen Dynamics at Subarctic Tree Line
Warming will likely stimulate Arctic primary production, but also soil C and N mineralization, and it remains uncertain whether the Arctic will become a sink or a source for CO2. Increasing insect herbivory may also dampen the positive response of plant production and soil C input to warming. We con...
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ftluke:oai:jukuri.luke.fi:10024/548115 2023-10-09T21:48:53+02:00 Strong Interactive Effects of Warming and Insect Herbivory on Soil Carbon and Nitrogen Dynamics at Subarctic Tree Line Meyer, Nele Silfver, Tarja Karhu, Kristiina Myller, Kristiina Sietiö, Outi-Maaria Myrsky, Eero Oksanen, Elina Rousi, Matti Mikola, Juha orcid:0000-0002-4336-2648 orcid:0000-0003-0619-5008 4100310610 Luonnonvarakeskus 14 p. true https://jukuri.luke.fi/handle/10024/548115 en eng Frontiers Frontiers in forests and global change 10.3389/ffgc.2021.773223 2624-893X 4 773223 https://jukuri.luke.fi/handle/10024/548115 URN:NBN:fi-fe2021111956234 CC BY 4.0 primary production root growth climate warming microbial biomass soil respiration soil organic matter publication fi=A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä|sv=A1 Originalartikel i en vetenskaplig tidskrift|en=A1 Journal article (refereed), original research| fi=Publisher's version|sv=Publisher's version|en=Publisher's version| ftluke 2023-09-12T20:28:06Z Warming will likely stimulate Arctic primary production, but also soil C and N mineralization, and it remains uncertain whether the Arctic will become a sink or a source for CO2. Increasing insect herbivory may also dampen the positive response of plant production and soil C input to warming. We conducted an open-air warming experiment with Subarctic field layer vegetation in North Finland to explore the effects of warming (+3°C) and reduced insect herbivory (67% reduction in leaf damage using an insecticide) on soil C and N dynamics. We found that plant root growth, soil C and N concentrations, microbial biomass C, microbial activity, and soil NH4+ availability were increased by both warming and reduced herbivory when applied alone, but not when combined. Soil NO3– availability increased by warming only and in-situ soil respiration by reduced herbivory only. Our results suggest that increasing C input from vegetation under climate warming increases soil C concentration, but also stimulates soil C turnover. On the other hand, it appears that insect herbivores can significantly reduce plant growth. If their abundance increases with warming as predicted, they may curtail the positive effect of warming on soil C concentration. Moreover, our results suggest that temperature and herbivory effects on root growth and soil variables interact strongly, which probably arises from a combination of N demand increasing under lower herbivory and soil mineral N supply increasing under higher temperature. This may further complicate the effects of rising temperatures on Subarctic soil C dynamics. 2021 Article in Journal/Newspaper Arctic North Finland Subarctic Natural Resources Institute Finland: Jukuri Arctic |
institution |
Open Polar |
collection |
Natural Resources Institute Finland: Jukuri |
op_collection_id |
ftluke |
language |
English |
topic |
primary production root growth climate warming microbial biomass soil respiration soil organic matter |
spellingShingle |
primary production root growth climate warming microbial biomass soil respiration soil organic matter Meyer, Nele Silfver, Tarja Karhu, Kristiina Myller, Kristiina Sietiö, Outi-Maaria Myrsky, Eero Oksanen, Elina Rousi, Matti Mikola, Juha Strong Interactive Effects of Warming and Insect Herbivory on Soil Carbon and Nitrogen Dynamics at Subarctic Tree Line |
topic_facet |
primary production root growth climate warming microbial biomass soil respiration soil organic matter |
description |
Warming will likely stimulate Arctic primary production, but also soil C and N mineralization, and it remains uncertain whether the Arctic will become a sink or a source for CO2. Increasing insect herbivory may also dampen the positive response of plant production and soil C input to warming. We conducted an open-air warming experiment with Subarctic field layer vegetation in North Finland to explore the effects of warming (+3°C) and reduced insect herbivory (67% reduction in leaf damage using an insecticide) on soil C and N dynamics. We found that plant root growth, soil C and N concentrations, microbial biomass C, microbial activity, and soil NH4+ availability were increased by both warming and reduced herbivory when applied alone, but not when combined. Soil NO3– availability increased by warming only and in-situ soil respiration by reduced herbivory only. Our results suggest that increasing C input from vegetation under climate warming increases soil C concentration, but also stimulates soil C turnover. On the other hand, it appears that insect herbivores can significantly reduce plant growth. If their abundance increases with warming as predicted, they may curtail the positive effect of warming on soil C concentration. Moreover, our results suggest that temperature and herbivory effects on root growth and soil variables interact strongly, which probably arises from a combination of N demand increasing under lower herbivory and soil mineral N supply increasing under higher temperature. This may further complicate the effects of rising temperatures on Subarctic soil C dynamics. 2021 |
author2 |
orcid:0000-0002-4336-2648 orcid:0000-0003-0619-5008 4100310610 Luonnonvarakeskus |
format |
Article in Journal/Newspaper |
author |
Meyer, Nele Silfver, Tarja Karhu, Kristiina Myller, Kristiina Sietiö, Outi-Maaria Myrsky, Eero Oksanen, Elina Rousi, Matti Mikola, Juha |
author_facet |
Meyer, Nele Silfver, Tarja Karhu, Kristiina Myller, Kristiina Sietiö, Outi-Maaria Myrsky, Eero Oksanen, Elina Rousi, Matti Mikola, Juha |
author_sort |
Meyer, Nele |
title |
Strong Interactive Effects of Warming and Insect Herbivory on Soil Carbon and Nitrogen Dynamics at Subarctic Tree Line |
title_short |
Strong Interactive Effects of Warming and Insect Herbivory on Soil Carbon and Nitrogen Dynamics at Subarctic Tree Line |
title_full |
Strong Interactive Effects of Warming and Insect Herbivory on Soil Carbon and Nitrogen Dynamics at Subarctic Tree Line |
title_fullStr |
Strong Interactive Effects of Warming and Insect Herbivory on Soil Carbon and Nitrogen Dynamics at Subarctic Tree Line |
title_full_unstemmed |
Strong Interactive Effects of Warming and Insect Herbivory on Soil Carbon and Nitrogen Dynamics at Subarctic Tree Line |
title_sort |
strong interactive effects of warming and insect herbivory on soil carbon and nitrogen dynamics at subarctic tree line |
publisher |
Frontiers |
url |
https://jukuri.luke.fi/handle/10024/548115 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic North Finland Subarctic |
genre_facet |
Arctic North Finland Subarctic |
op_relation |
Frontiers in forests and global change 10.3389/ffgc.2021.773223 2624-893X 4 773223 https://jukuri.luke.fi/handle/10024/548115 URN:NBN:fi-fe2021111956234 |
op_rights |
CC BY 4.0 |
_version_ |
1779311951466201088 |