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Warming and increased precipitation enhance phenol oxidase activity in soil while warming induces drought stress in vegetation of an Arctic ecosystem

Cited 3 time in scopus
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Title
Warming and increased precipitation enhance phenol oxidase activity in soil while warming induces drought stress in vegetation of an Arctic ecosystem
Other Titles
북극 생태계에서 온도 상승과 강수량 증가가 phenol oxidase 활성을 증가시키고, 온도 상승은 식생에 건조 스트레스를 야기한다
Authors
서주영
Kang, Hojeong
Lee, Yoo Kyung
Jung, Ji Young
장인영
Keywords
Arctic soil; Climate change; drought stress; extracellular enzyme activity; organic matter decomposition; phenol oxidase; Agriculture
Issue Date
2015
Citation
서주영, et al. 2015. "Warming and increased precipitation enhance phenol oxidase activity in soil while warming induces drought stress in vegetation of an Arctic ecosystem". GEODERMA, 259: 347-353.
Abstract
Global climate change models predict that surface temperature and precipitation will increase in the Polar Regions. Arctic tundra soils contain a large amount of carbon, which may be vulnerable to decomposition under potential climate change.However,mechanistic understanding of the decomposition process and the consequent changes remains lacking. In the present study,we conducted amanipulation experiment at an arctic soil system in Cambridge Bay, Canada, where temperature and precipitation were increased artificially by installing open top chambers and adding distilled water during growing seasons. After one and half year of environmental manipulation,we investigated extracellular enzyme activities,which are related to decomposition, and analyzed stable isotope signatures (δ13C and δ15N) in soils and plants,which are related to water and nitrogen availability. Hydrolase (β-D-glucosidase, cellobiase, N-acetyl-glucosidase and aminopeptidase) activity did not differ significantly under different treatments. However, phenol-oxidase showed higher activity under warming combined with increased precipitation than under other treatments. Stable isotope ratio (δ13C) in plants revealed that drought stress in vegetation was induced under warming.We concluded that in the long term, climate change may amplify the feedback of soil to climate change in arctic tundra soil.
URI
http://repository.kopri.re.kr/handle/201206/6707
DOI
http://dx.doi.org/10.1016/j.geoderma.2015.03.017
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