Carbon-degrading enzyme activities stimulated by increased nutrient availability in Arctic tundra soils
Climate-induced warming of the Arctic tundra is expected to increase nutrient availability to soil microbes, which in turn may accelerate soil organic matter (SOM) decomposition. We increased nutrient availability via fertilization to investigate the microbial response via soil enzyme activities. Sp...
Published in: | PLoS ONE |
---|---|
Main Authors: | , , , , |
Format: | Text |
Language: | English |
Published: |
Colorado State University. Libraries
2007
|
Subjects: | |
Online Access: | http://hdl.handle.net/10217/84908 https://doi.org/10.1371/journal.pone.0077212 |
id |
ftmountainschol:oai:mountainscholar.org:10217/84908 |
---|---|
record_format |
openpolar |
spelling |
ftmountainschol:oai:mountainscholar.org:10217/84908 2023-06-18T03:38:33+02:00 Carbon-degrading enzyme activities stimulated by increased nutrient availability in Arctic tundra soils Koyama, Akihiro, author Wallenstein, Matthw D., author Simpson, Rodney T., author Moore, John C., author Public Library of Science, publisher Arctic regions 2007-01-03T07:01:04Z born digital articles application/pdf http://hdl.handle.net/10217/84908 https://doi.org/10.1371/journal.pone.0077212 English eng eng Colorado State University. Libraries Open Access Research and Scholarship Fund (OARS) Koyama, Akihiro, Matthw D. Wallenstein, Rodney T. Simpson and John C. Moore, Carbon-Degrading Enzyme Activities Stimulated by Increased Nutrient Availability in Arctic Tundra Soils. PLoS ONE 8, no. 10 (October 2013): e77212, 1-12. http://dx.doi.org/10.1371/journal.pone.0077212 http://hdl.handle.net/10217/84908 https://dx.doi.org/10.1371/journal.pone.0077212 https://creativecommons.org/licenses/by/4.0/ This article is open access and distributed under the terms and conditions of the Creative Commons Attribution 4.0 International (CC BY 4.0). soil organic carbon soil organic matter decomposition Arctic tundra ecosystem Text 2007 ftmountainschol https://doi.org/10.1371/journal.pone.0077212 2023-06-03T17:47:24Z Climate-induced warming of the Arctic tundra is expected to increase nutrient availability to soil microbes, which in turn may accelerate soil organic matter (SOM) decomposition. We increased nutrient availability via fertilization to investigate the microbial response via soil enzyme activities. Specifically, we measured potential activities of seven enzymes at four temperatures in three soil profiles (organic, organic/mineral interface, and mineral) from untreated native soils and from soils which had been fertilized with nitrogen (N) and phosphorus (P) since 1989 (23 years) and 2006 (six years). Fertilized plots within the 1989 site received annual additions of 10 g N⋅m-2⋅year-1 and 5 g P⋅m-2⋅year-1. Within the 2006 site, two fertilizer regimes were established - one in which plots received 5 g N⋅m-2⋅year-1 and 2.5 g P⋅m-2⋅year-1 and one in which plots received 10 g N⋅m-2⋅year-1 and 5 g P⋅m-2⋅year-1. The fertilization treatments increased activities of enzymes hydrolyzing carbon (C)-rich compounds but decreased phosphatase activities, especially in the organic soils. Activities of two enzymes that degrade N-rich compounds were not affected by the fertilization treatments. The fertilization treatments increased ratios of enzyme activities degrading C-rich compounds to those for N-rich compounds or phosphate, which could lead to changes in SOM chemistry over the long term and to losses of soil C. Accelerated SOM decomposition caused by increased nutrient availability could significantly offset predicted increased C fixation via stimulated net primary productivity in Arctic tundra ecosystems. Published with support from the Colorado State University Libraries Open Access Research and Scholarship Fund. Text Arctic Arctic Tundra Mountain Scholar (Digital Collections of Colorado and Wyoming) Arctic PLoS ONE 8 10 e77212 |
institution |
Open Polar |
collection |
Mountain Scholar (Digital Collections of Colorado and Wyoming) |
op_collection_id |
ftmountainschol |
language |
English |
topic |
soil organic carbon soil organic matter decomposition Arctic tundra ecosystem |
spellingShingle |
soil organic carbon soil organic matter decomposition Arctic tundra ecosystem Koyama, Akihiro, author Wallenstein, Matthw D., author Simpson, Rodney T., author Moore, John C., author Public Library of Science, publisher Carbon-degrading enzyme activities stimulated by increased nutrient availability in Arctic tundra soils |
topic_facet |
soil organic carbon soil organic matter decomposition Arctic tundra ecosystem |
description |
Climate-induced warming of the Arctic tundra is expected to increase nutrient availability to soil microbes, which in turn may accelerate soil organic matter (SOM) decomposition. We increased nutrient availability via fertilization to investigate the microbial response via soil enzyme activities. Specifically, we measured potential activities of seven enzymes at four temperatures in three soil profiles (organic, organic/mineral interface, and mineral) from untreated native soils and from soils which had been fertilized with nitrogen (N) and phosphorus (P) since 1989 (23 years) and 2006 (six years). Fertilized plots within the 1989 site received annual additions of 10 g N⋅m-2⋅year-1 and 5 g P⋅m-2⋅year-1. Within the 2006 site, two fertilizer regimes were established - one in which plots received 5 g N⋅m-2⋅year-1 and 2.5 g P⋅m-2⋅year-1 and one in which plots received 10 g N⋅m-2⋅year-1 and 5 g P⋅m-2⋅year-1. The fertilization treatments increased activities of enzymes hydrolyzing carbon (C)-rich compounds but decreased phosphatase activities, especially in the organic soils. Activities of two enzymes that degrade N-rich compounds were not affected by the fertilization treatments. The fertilization treatments increased ratios of enzyme activities degrading C-rich compounds to those for N-rich compounds or phosphate, which could lead to changes in SOM chemistry over the long term and to losses of soil C. Accelerated SOM decomposition caused by increased nutrient availability could significantly offset predicted increased C fixation via stimulated net primary productivity in Arctic tundra ecosystems. Published with support from the Colorado State University Libraries Open Access Research and Scholarship Fund. |
format |
Text |
author |
Koyama, Akihiro, author Wallenstein, Matthw D., author Simpson, Rodney T., author Moore, John C., author Public Library of Science, publisher |
author_facet |
Koyama, Akihiro, author Wallenstein, Matthw D., author Simpson, Rodney T., author Moore, John C., author Public Library of Science, publisher |
author_sort |
Koyama, Akihiro, author |
title |
Carbon-degrading enzyme activities stimulated by increased nutrient availability in Arctic tundra soils |
title_short |
Carbon-degrading enzyme activities stimulated by increased nutrient availability in Arctic tundra soils |
title_full |
Carbon-degrading enzyme activities stimulated by increased nutrient availability in Arctic tundra soils |
title_fullStr |
Carbon-degrading enzyme activities stimulated by increased nutrient availability in Arctic tundra soils |
title_full_unstemmed |
Carbon-degrading enzyme activities stimulated by increased nutrient availability in Arctic tundra soils |
title_sort |
carbon-degrading enzyme activities stimulated by increased nutrient availability in arctic tundra soils |
publisher |
Colorado State University. Libraries |
publishDate |
2007 |
url |
http://hdl.handle.net/10217/84908 https://doi.org/10.1371/journal.pone.0077212 |
op_coverage |
Arctic regions |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Arctic Tundra |
genre_facet |
Arctic Arctic Tundra |
op_relation |
Open Access Research and Scholarship Fund (OARS) Koyama, Akihiro, Matthw D. Wallenstein, Rodney T. Simpson and John C. Moore, Carbon-Degrading Enzyme Activities Stimulated by Increased Nutrient Availability in Arctic Tundra Soils. PLoS ONE 8, no. 10 (October 2013): e77212, 1-12. http://dx.doi.org/10.1371/journal.pone.0077212 http://hdl.handle.net/10217/84908 https://dx.doi.org/10.1371/journal.pone.0077212 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ This article is open access and distributed under the terms and conditions of the Creative Commons Attribution 4.0 International (CC BY 4.0). |
op_doi |
https://doi.org/10.1371/journal.pone.0077212 |
container_title |
PLoS ONE |
container_volume |
8 |
container_issue |
10 |
container_start_page |
e77212 |
_version_ |
1769003511954014208 |