干旱区生态环境知识资源中心(Arid): Litter microbial respiration and enzymatic resistance to drought stress

Arid

DOI	10.1525/elementa.442
	Litter microbial respiration and enzymatic resistance to drought stress
	Nisson, Devan M.; Allison, Steven D.
通讯作者	Nisson, DM
来源期刊	ELEMENTA-SCIENCE OF THE ANTHROPOCENE
ISSN	2325-1026
出版年	2020
卷号	8
英文摘要	Many ecosystems are experiencing an increase in drought conditions as a consequence of climate warming and changing precipitation patterns. The stress imposed by these environmental changes can affect ecosystem processes such as the extracellular enzymatic degradation of carbon-containing leaf litter by soil microbial communities. However, the magnitude of these impacts may depend on the composition and metabolism of the microbial community. Based on the hypothesis of local adaptation, microbial communities native to warm-dry ecosystems should display a greater capacity to degrade leaf litter polymers with extracellular enzymes following exposure to warm-dry conditions. To test this hypothesis, we performed a microcosm study in which we monitored extracellular enzyme activity and respiration of microbial communities from five ecosystems along a southern California climate gradient, ranging from warmer, drier desert to wetter, cooler subalpine forest. To simulate drought and rewetting, we subjected microcosms to periods of high temperature and low moisture followed by a water pulse. We found that enzyme activity of wet-cool communities generally exceeded that of warm-dry communities across enzyme types for the five sites we considered. Additionally, we observed a significant decrease in respiration for all communities after longer durations of drought exposure. Although these findings did not align with our expectations of local adaptation, they suggest litter-inhabiting microbial communities are able to retain metabolic functioning in environmental conditions different from those of their native ecosystems. These results may imply that factors such as litter chemistry impose greater constraints than climate on community metabolic function. Overall, despite differences in local climates, microbial communities from semiarid regions may be metabolically adapted to maintain functioning in the face of drought.
英文关键词	Microbial community Respiration Extracellular enzyme Drought stress Climate change Local adaptation
类型	Article
语种	英语
开放获取类型	DOAJ Gold
收录类别	SCI-E
WOS记录号	WOS:000563919500001
WOS关键词	SOIL RESPIRATION ; NITROGEN ADDITION ; CLIMATE-CHANGE ; LOCAL ADAPTATION ; TEMPERATURE ; FOREST ; PRECIPITATION ; RESPONSES ; DECOMPOSITION ; COMMUNITIES
WOS类目	Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/325890
作者单位	[Nisson, Devan M.] Princeton Univ, Dept Geosci, Princeton, NJ 08544 USA; [Allison, Steven D.] Univ Calif Irvine, Dept Ecol & Evolutionary Biol, Irvine, CA 92717 USA; [Allison, Steven D.] Univ Calif Irvine, Dept Earth Syst Sci, Irvine, CA 92717 USA
推荐引用方式 GB/T 7714	Nisson, Devan M.,Allison, Steven D.. Litter microbial respiration and enzymatic resistance to drought stress[J],2020,8.
APA	Nisson, Devan M.,&Allison, Steven D..(2020).Litter microbial respiration and enzymatic resistance to drought stress.ELEMENTA-SCIENCE OF THE ANTHROPOCENE,8.
MLA	Nisson, Devan M.,et al."Litter microbial respiration and enzymatic resistance to drought stress".ELEMENTA-SCIENCE OF THE ANTHROPOCENE 8(2020).