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 CO 2 . Increasing insect herbivory may also dampen the positive response of plant production and soil C input to warming. We c...
Published in: | Frontiers in Forests and Global Change |
---|---|
Main Authors: | , , , , , , , , |
Other Authors: | |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
Frontiers Media SA
2021
|
Subjects: | |
Online Access: | http://dx.doi.org/10.3389/ffgc.2021.773223 https://www.frontiersin.org/articles/10.3389/ffgc.2021.773223/full |
id |
crfrontiers:10.3389/ffgc.2021.773223 |
---|---|
record_format |
openpolar |
spelling |
crfrontiers:10.3389/ffgc.2021.773223 2024-02-11T10:01:08+01:00 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 Helsingin Yliopisto 2021 http://dx.doi.org/10.3389/ffgc.2021.773223 https://www.frontiersin.org/articles/10.3389/ffgc.2021.773223/full unknown Frontiers Media SA https://creativecommons.org/licenses/by/4.0/ Frontiers in Forests and Global Change volume 4 ISSN 2624-893X Nature and Landscape Conservation Environmental Science (miscellaneous) Ecology Global and Planetary Change Forestry journal-article 2021 crfrontiers https://doi.org/10.3389/ffgc.2021.773223 2024-01-26T10:06:31Z 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 CO 2 . 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 NH 4 + availability were increased by both warming and reduced herbivory when applied alone, but not when combined. Soil NO 3 – 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. Article in Journal/Newspaper Arctic North Finland Subarctic Frontiers (Publisher) Arctic Frontiers in Forests and Global Change 4 |
institution |
Open Polar |
collection |
Frontiers (Publisher) |
op_collection_id |
crfrontiers |
language |
unknown |
topic |
Nature and Landscape Conservation Environmental Science (miscellaneous) Ecology Global and Planetary Change Forestry |
spellingShingle |
Nature and Landscape Conservation Environmental Science (miscellaneous) Ecology Global and Planetary Change Forestry 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 |
Nature and Landscape Conservation Environmental Science (miscellaneous) Ecology Global and Planetary Change Forestry |
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 CO 2 . 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 NH 4 + availability were increased by both warming and reduced herbivory when applied alone, but not when combined. Soil NO 3 – 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. |
author2 |
Helsingin Yliopisto |
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 Media SA |
publishDate |
2021 |
url |
http://dx.doi.org/10.3389/ffgc.2021.773223 https://www.frontiersin.org/articles/10.3389/ffgc.2021.773223/full |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic North Finland Subarctic |
genre_facet |
Arctic North Finland Subarctic |
op_source |
Frontiers in Forests and Global Change volume 4 ISSN 2624-893X |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3389/ffgc.2021.773223 |
container_title |
Frontiers in Forests and Global Change |
container_volume |
4 |
_version_ |
1790596882756534272 |