Effects of continuous drought stress on soil respiration in a tropical rainforest in southwest China

Zhang, Xiang; Zhang, Yiping; Sha, Liqing; Wu, Chuansheng; Tan, Zheng-Hong; Song, Qinghai; Liu, Yuntong; Liang, Dong

doi:10.1007/s11104-015-2523-4

Cited by 48 publications

(47 citation statements)

References 55 publications

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“…Soil respiration is one of the major pathways of C exchange between the biosphere and the atmosphere (Inglima et al., ), and largely determines terrestrial C sequestration (Chen, Post, Norby, & Classen, ; Zhou et al., ). Soil respiration in response to changing precipitation can substantially affect soil C pool (Ford, McGee, Scandellari, Hobbie, & Mitchell, ; Zhang et al., ). Our findings of suppressed soil respiration under both advanced and delay precipitation peaks during the growing season, in combination with their additive effects, indicate that less soil C will be released from arid and semiarid ecosystems to the atmosphere under changing precipitation regimes in the future.…”

Section: Discussionmentioning

confidence: 99%

Shifts of growing‐season precipitation peaks decrease soil respiration in a semiarid grassland

Zhou

Hui

et al. 2017

Global Change Biology

107

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Changing precipitation regimes could have profound influences on carbon (C) cycle in the biosphere. However, how soil C release from terrestrial ecosystems responds to changing seasonal distribution of precipitation remains unclear. A field experiment was conducted for 4 years (2013-2016) to examine the effects of altered precipitation distributions in the growing season on soil respiration in a temperate steppe in the Mongolian Plateau. Over the 4 years, both advanced and delayed precipitation peaks suppressed soil respiration, and the reductions mainly occurred in August. The decreased soil respiration could be primarily attributable to water stress and subsequently limited plant growth (community cover and belowground net primary productivity) and soil microbial activities in the middle growing season, suggesting that precipitation amount in the middle growing season is more important than that in the early, late, or whole growing seasons in regulating soil C release in grasslands. The observations of the additive effects of advanced and delayed precipitation peaks indicate semiarid grasslands will release less C through soil respiratory processes under the projected seasonal redistribution of precipitation in the future. Our findings highlight the potential role of intra-annual redistribution of precipitation in regulating ecosystem C cycling in arid and semiarid regions.

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Section: Discussionmentioning

confidence: 99%

Shifts of growing‐season precipitation peaks decrease soil respiration in a semiarid grassland

Zhou

Hui

et al. 2017

Global Change Biology

107

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“…In contrast, WW did not change monthly measured soil moisture, but significantly increased soil respiration (Figure 2d,f). Several precipitation manipulation experiments also suggested that soil respiration was not affected by increased soil moisture (e.g., Davidson et al, 2008;Deng et al, 2012;Zhang et al, 2015). The decoupling between soil respiration and soil moisture change could be attributed to limitation of other environmental variables to soil respiration (Vasconcelos et al, 2004;Zhang et al, 2015), the adaption of soil microbes and plants to altered soil moisture (Bouskill et al, 2013;Kozlowski & Pallardy, 2002;Kruse, Turnbull, & Adams, 2012), and so on.…”

Section: Effects On Soil Respirationmentioning

confidence: 99%

“…Thus, soil respiration does not always respond positively to precipitation change. In some studies, drought has been found to increase soil respiration by alleviating the oxygen deficit (Liu, Liu, et al, ; Zhang et al, ). In contrast, increased precipitation has been found to decrease soil respiration in a mesic ecosystem (Suseela & Dukes, ).…”

Section: Introductionmentioning

confidence: 99%

“…In contrast, increased precipitation has been found to decrease soil respiration in a mesic ecosystem (Suseela & Dukes, ). Furthermore, there are some studies suggesting that soil respiration is resistant to precipitation changes (e.g., Davidson, Nepstad, Ishida, & Brando, ; Deng et al, ; Zhang et al, ). For example, in a seasonally dry forest, Jiang et al () found that doubling precipitation did not affect soil respiration during the wet season when the ambient precipitation was high.…”

Section: Introductionmentioning

confidence: 99%

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Effects of seasonal precipitation change on soil respiration processes in a seasonally dry tropical forest

Chen

et al. 2019

Ecology and Evolution

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Precipitation is projected to change intensity and seasonal regime under current global projections. However, little is known about how seasonal precipitation changes will affect soil respiration, especially in seasonally dry tropical forests. In a seasonally dry tropical forest in South China, we conducted a precipitation manipulation experiment to simulate a delayed wet season (DW) and a wetter wet season (WW) over a three-year period. In DW, we reduced 60% throughfall in April and May to delay the onset of the wet season and irrigated the same amount water into the plots in October and November to extend the end of the wet season. In WW, we irrigated 25% annual precipitation into plots in July and August. A control treatment (CT) receiving ambient precipitation was also established. Compared with CT, DW significantly increased soil moisture by 54% during October to November, and by 30% during December to April. The treatment of WW did not significantly affect monthly measured soil moisture. In 2015, DW significantly increased leaf area index and soil microbial biomass but decreased fine root biomass. In contrast, WW significantly decreased fine root biomass and forest floor litter stocks. Soil respiration was not affected by DW, which could be attributed to the increased microbial biomass offsetting the decrease in fine root biomass. In contrast, WW significantly increased soil respiration from 3.40 to 3.90 μmol m −2 s −1 in the third year, mainly due to the increased litter decomposition and soil pH (from 4.48 to 4.68). The present study suggests that both a delayed wet season and a wetter wet season will have significant impacts on soil respiration-associated ecosystem components. However, the ecosystem components can respond in different directions to the same change in precipitation, which ultimately affected soil respiration. K E Y W O R D S climate change, precipitation regime, rainfall change, soil CO 2 , tropics S U PP O RTI N G I N FO R M ATI O N Additional supporting information may be found online in the Supporting Information section. How to cite this article: Yu S, Mo Q, Chen Y, et al. Effects of seasonal precipitation change on soil respiration processes in a seasonally dry tropical forest. Ecol Evol. 2020;10:467-479.

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“…Similarly, a 3 year soil moisture exclusion that reduced rainfall by 50% in five 100 m 2 plots in a tropical forest in Southwestern China showed soil moisture declined by 4‐5.5% during the wet season, and 1‐5% during the dry season, with no effect on soil temperature. In this study, soil respiration increased by 30% during the rainy season over 3 years, with no effect during the dry season [ Zhang et al ., ], again suggesting that C stocks in wetter soils are more vulnerable to drying. In a 100% precipitation exclusion experiment in 0.5 m 2 plots in Costa Rican forests and in lab incubations using a range of soil moistures, soil respiration increased following intense short‐term reductions in precipitation [ Waring and Hawkes , ].…”

Section: Review Of Global Change Effects On Tropical Ecosystemsmentioning

confidence: 99%

Global change effects on humid tropical forests: Evidence for biogeochemical and biodiversity shifts at an ecosystem scale

Cusack

Karpman

Ashdown

et al. 2016

Reviews of Geophysics

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Government and international agencies have highlighted the need to focus global change research efforts on tropical ecosystems. However, no recent comprehensive review exists synthesizing humid tropical forest responses across global change factors, including warming, decreased precipitation, carbon dioxide fertilization, nitrogen deposition, and land use/land cover changes. This paper assesses research across spatial and temporal scales for the tropics, including modeling, field, and controlled laboratory studies. The review aims to (1) provide a broad understanding of how a suite of global change factors are altering humid tropical forest ecosystem properties and biogeochemical processes; (2) assess spatial variability in responses to global change factors among humid tropical regions; (3) synthesize results from across humid tropical regions to identify emergent trends in ecosystem responses; (4) identify research and management priorities for the humid tropics in the context of global change. Ecosystem responses covered here include plant growth, carbon storage, nutrient cycling, biodiversity, and disturbance regime shifts. The review demonstrates overall negative effects of global change on all ecosystem properties, with the greatest uncertainty and variability in nutrient cycling responses. Generally, all global change factors reviewed, except for carbon dioxide fertilization, demonstrate great potential to trigger positive feedbacks to global warming via greenhouse gas emissions and biogeophysical changes that cause regional warming. This assessment demonstrates that effects of decreased rainfall and deforestation on tropical forests are relatively well understood, whereas the potential effects of warming, carbon dioxide fertilization, nitrogen deposition, and plant species invasions require more cross-site, mechanistic research to predict tropical forest responses at regional and global scales.

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Effects of continuous drought stress on soil respiration in a tropical rainforest in southwest China

Cited by 48 publications

References 55 publications

Shifts of growing‐season precipitation peaks decrease soil respiration in a semiarid grassland

Shifts of growing‐season precipitation peaks decrease soil respiration in a semiarid grassland

Effects of seasonal precipitation change on soil respiration processes in a seasonally dry tropical forest

Global change effects on humid tropical forests: Evidence for biogeochemical and biodiversity shifts at an ecosystem scale

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