Responses of soil respiration to rainfall addition in a desert ecosystem: Linking physiological activities and rainfall pattern

Wang, Yang; Li, Xiaoyan; Zhang, Cicheng; Wu, Xiuchen; Du, Enzai; Wu, Huawu; Yang, Xiaofan; Wang, Pei; Bai, Yan; Wu, Yinan; Huang, Yongmei

doi:10.1016/j.scitotenv.2018.10.057

Cited by 24 publications

(9 citation statements)

References 49 publications

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“…Therefore, a single deluge was able to increase seasonal soil respiration, but earlier deluges (Early and Mid) caused a greater increase than a deluge later in the season. Such dynamic temporal responses have been found in other arid and semi‐arid ecosystems, with larger soil respiration increases following an early‐season rain pulse than a late‐season one (Chou, Silver, Jackson, Thompson, & Allen‐Diaz, 2008; Song et al., 2012; Wang et al., 2019). This dampened response to late‐season deluge events could be attributed to decreased root activity as plants begin to senesce towards the end of the growing season (Knight, 1973; Parton et al., 2012).…”

Section: Discussionmentioning

confidence: 60%

The importance of extreme rainfall events and their timing in a semi‐arid grassland

Post

Knapp

2020

Journal of Ecology

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Section: Discussionmentioning

confidence: 60%

The importance of extreme rainfall events and their timing in a semi‐arid grassland

Post

Knapp

2020

Journal of Ecology

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“…Third, the significant differences in SWC and AN can also result in variations in R S among the different sites. The multiple stepwise linear regression analysis revealed that the concentration of SWC was of much greater importance than AN on bacterial community composition, which suggested that SWC is very likely to be the restricting factor in the metabolic process in dry and semi‐dry ecosystems (Zhang et al ., 2015; Wang et al ., 2019).…”

Section: Discussionmentioning

confidence: 99%

How do soil microbes exert impact on soil respiration and its temperature sensitivity?

Tong

Xiao

et al. 2021

Environmental Microbiology

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Understanding how soil microorganisms influence the direction and magnitude of soil carbon feedback to global warming is vital to predict future climate change. Although microbial activities are major contributors to soil respiration (R S ) and its temperature sensitivity (Q 10 ), the mechanisms underpinning microbial influence on R S and Q 10 remain unclear. Coupling variation partitioning analysis (VPA), correlation analysis and multiple stepwise linear regression analysis, we illustrate that bacteria mainly affect R S and its temperature sensitivity (Q 10 ) by shifting bacterial community composition (denoted by principal coordinates analysis). We also found that soil water content (SWC) and available nutrient (AN) were the factor key to changing bacterial community composition (P < 0.05). Co-occurrence network demonstrated that Mod 0 ecological cluster composed of copiotrophic taxa groups was significantly associated with R S and Q 10 (P < 0.01, R > 0.5), including Proteobacteria, Actinobacteria, and Bacteroidetes. Illuminating the mechanisms underpinning the influence of soil microbes on R S and Q 10 values is fundamental to understanding mechanistic soil-climate carbon cycles.

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“…Soil respiration (SR), mainly composed of soil autotrophic respiration and soil heterotrophic respiration (Yu et al, 2017; Zhang, Li, et al, 2019), is the largest source of carbon flux from the terrestrial ecosystem to the atmosphere (Bond‐Lamberty & Allison, 2010; Liu et al, 2016; Wang et al, 2019). And its dynamics will be critically important for the accurate prediction of the potential for carbon sequestration in terrestrial ecosystems (Qu et al, 2019; Zhang, Zhao, et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Ambient precipitation determines the sensitivity of soil respiration to precipitation treatments in a marsh

Hou

Chu

et al. 2023

Global Change Biology

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The effects in field manipulation experiments are strongly influenced by amplified interannual variation in ambient climate as the experimental duration increases. Soil respiration (SR), as an important part of the carbon cycle in terrestrial ecosystems, is sensitive to climate changes such as temperature and precipitation changes. A growing body of evidence has indicated that ambient climate affects the temperature sensitivity of SR, which benchmarks the strength of terrestrial soil carbon–climate feedbacks. However, whether SR sensitivity to precipitation changes is influenced by ambient climate is still not clear. In addition, the mechanism driving the above phenomenon is still poorly understood. Here, a long‐term field manipulation experiment with five precipitation treatments (−60%, −40%, +0%, +40%, and +60% of annual precipitation) was conducted in a marsh in the Yellow River Delta, China, which is sensitive to soil drying–wetting cycle caused by precipitation changes. Results showed that SR increased exponentially along the experimental precipitation gradient each year and the sensitivity of SR (standardized by per 100 mm change in precipitation under precipitation treatments) exhibited significant interannual variation from 2016 to 2021. In addition, temperature, net radiation, and ambient precipitation all exhibited dramatic interannual variability; however, only ambient precipitation had a significant negative correlation with SR sensitivity. Moreover, the sensitivity of SR was significantly positively related to the sensitivity of belowground biomass (BGB) across 6 years. Structural equation modeling and regression analysis also showed that precipitation treatments significantly affected SR and its autotrophic and heterotrophic components by altering BGB. Our study demonstrated that ambient precipitation determines the sensitivity of SR to precipitation treatments in marshes. The findings underscore the importance of ambient climate in regulating ecosystem responses in long‐term field manipulation experiments.

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Responses of soil respiration to rainfall addition in a desert ecosystem: Linking physiological activities and rainfall pattern

Cited by 24 publications

References 49 publications

The importance of extreme rainfall events and their timing in a semi‐arid grassland

The importance of extreme rainfall events and their timing in a semi‐arid grassland

How do soil microbes exert impact on soil respiration and its temperature sensitivity?

Ambient precipitation determines the sensitivity of soil respiration to precipitation treatments in a marsh

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