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...
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ftdoajarticles:oai:doaj.org/article:2b88e75936a1477da7b888809d5dcd0e 2023-05-15T14:54:50+02:00 Carbon-degrading enzyme activities stimulated by increased nutrient availability in Arctic tundra soils. Akihiro Koyama Matthew D Wallenstein Rodney T Simpson John C Moore 2013-01-01T00:00:00Z https://doi.org/10.1371/journal.pone.0077212 https://doaj.org/article/2b88e75936a1477da7b888809d5dcd0e EN eng Public Library of Science (PLoS) http://europepmc.org/articles/PMC3817314?pdf=render https://doaj.org/toc/1932-6203 1932-6203 doi:10.1371/journal.pone.0077212 https://doaj.org/article/2b88e75936a1477da7b888809d5dcd0e PLoS ONE, Vol 8, Iss 10, p e77212 (2013) Medicine R Science Q article 2013 ftdoajarticles https://doi.org/10.1371/journal.pone.0077212 2022-12-31T02:12:50Z 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. Article in Journal/Newspaper Arctic Tundra Directory of Open Access Journals: DOAJ Articles Arctic PLoS ONE 8 10 e77212 |
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Directory of Open Access Journals: DOAJ Articles |
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English |
topic |
Medicine R Science Q |
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Medicine R Science Q Akihiro Koyama Matthew D Wallenstein Rodney T Simpson John C Moore Carbon-degrading enzyme activities stimulated by increased nutrient availability in Arctic tundra soils. |
topic_facet |
Medicine R Science Q |
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. |
format |
Article in Journal/Newspaper |
author |
Akihiro Koyama Matthew D Wallenstein Rodney T Simpson John C Moore |
author_facet |
Akihiro Koyama Matthew D Wallenstein Rodney T Simpson John C Moore |
author_sort |
Akihiro Koyama |
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 |
Public Library of Science (PLoS) |
publishDate |
2013 |
url |
https://doi.org/10.1371/journal.pone.0077212 https://doaj.org/article/2b88e75936a1477da7b888809d5dcd0e |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Tundra |
genre_facet |
Arctic Tundra |
op_source |
PLoS ONE, Vol 8, Iss 10, p e77212 (2013) |
op_relation |
http://europepmc.org/articles/PMC3817314?pdf=render https://doaj.org/toc/1932-6203 1932-6203 doi:10.1371/journal.pone.0077212 https://doaj.org/article/2b88e75936a1477da7b888809d5dcd0e |
op_doi |
https://doi.org/10.1371/journal.pone.0077212 |
container_title |
PLoS ONE |
container_volume |
8 |
container_issue |
10 |
container_start_page |
e77212 |
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1766326591072239616 |