Plant and Soil Enzyme Activities Regulate CO
alpine peatland
ecosystem respiration
extracellular enzyme activities
extreme drought
soil respiration
Journal
Frontiers in plant science
ISSN: 1664-462X
Titre abrégé: Front Plant Sci
Pays: Switzerland
ID NLM: 101568200
Informations de publication
Date de publication:
2021
2021
Historique:
received:
11
08
2021
accepted:
13
09
2021
entrez:
1
11
2021
pubmed:
2
11
2021
medline:
2
11
2021
Statut:
epublish
Résumé
Increasing attention has been given to the impact of extreme drought stress on ecosystem ecological processes. Ecosystem respiration (Re) and soil respiration (Rs) play a significant role in the regulation of the carbon (C) balance because they are two of the largest terrestrial C fluxes in the atmosphere. However, the responses of Re and Rs to extreme drought in alpine regions are still unclear, particularly with respect to the driver mechanism in plant and soil extracellular enzyme activities. In this study, we imposed three periods of extreme drought events based on field experiments on an alpine peatland: (1) early drought, in which the early stage of plant growth occurred from June 18 to July 20; (2) midterm drought, in which the peak growth period occurred from July 20 to August 23; and (3) late drought, in which the wilting period of plants occurred from August 23 to September 25. After 5 years of continuous extreme drought events, Re exhibited a consistent decreasing trend under the three periods of extreme drought, while Rs exhibited a non-significant decreasing trend in the early and midterm drought but increased significantly by 58.48% (
Identifiants
pubmed: 34721486
doi: 10.3389/fpls.2021.756956
pmc: PMC8551637
doi:
Types de publication
Journal Article
Langues
eng
Pagination
756956Informations de copyright
Copyright © 2021 Yan, Kang, Zhang, Li, Hao, Wu, Li, Zhang, Wang, Yan and Kang.
Déclaration de conflit d'intérêts
The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.
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