Ecological responses to heavy rainfall depend on seasonal timing and multi‐year recurrence

Li, Linfeng; Zheng, Zeyu; Xu, Cong; Xu, Zhihong; Che, Rongxiao; Wang, Yanfen; Cui, Xiaoyong; Hao, Yanbin

doi:10.1111/nph.15832

Cited by 47 publications

(27 citation statements)

References 88 publications

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“…Previous studies have argued that the rising BGB with increasing rainfall is attributed to enhanced GPP [17,19]. However, no positive relationship between BGB and GPP was found in our study.…”

Section: Different Responses Of Carbon Fluxes and Root Biomasscontrasting

confidence: 99%

“…However, the effect of EPE on NEE still lacks consistent agreement [16,30] due to discrepant treatments in current EPE experiments. In current opinion, EPE significantly affects NEE at short timescale (e.g., during treatment) [16,17], but NEE is not effected by EPE on a long timescale (e.g., after treatment or multi-year recurrence) due to ecosystem resistance [31] or stress memory [32].…”

Section: Effect Of Change In Rainfall Patterns On Carbon Fluxesmentioning

confidence: 91%

“…However, no positive relationship between BGB and GPP was found in our study. This could be the reason why BGB is more sensitive to total rainfall amount [17,40]. In addition, ER positively depends on the belowground biomass [19].…”

Section: Different Responses Of Carbon Fluxes and Root Biomassmentioning

confidence: 98%

“…Aboveground biomass (AGB) and belowground biomass (BGB) were clipped in a 1 × 1 m quadrat of each plot on 15 August. All living plants (AGB) above the soil surface were clipped by the harvest method [17]. For each year, the locations of quadrats were randomly changed to prevent resampling of the same quadrat.…”

Section: Experimental Designmentioning

confidence: 99%

“…Net ecosystem exchange (NEE), the balance between gross primary productivity (GPP) and ecosystem respiration (ER), is the shift signal from carbon source to sink, closely linking with the intensity of rainfall in grasslands [10,[15][16][17]. The different sensitivities of GPP and ER to variation in the intensity and frequency of rainfall control the magnitude and direction of NEE [1].…”

Section: Introductionmentioning

confidence: 99%

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Median to Strong Rainfall Intensity Favors Carbon Sink in a Temperate Grassland Ecosystem in China

Hao

Guo

et al. 2019

Sustainability

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Over the past 50 years, rainfall events have made significant alterations to environments due to global warming. The grasslands in arid and semi-arid regions are extremely sensitive to variations in rainfall patterns, which are considered to significantly affect ecosystem functions. In this study, an experiment with varying rainfall sizes and frequencies (0 mm, 2 mm, 5 mm, 10 mm, 20 mm, and 40 mm) was conducted during growing seasons in typical grasslands, to study the effect of changes in rainfall regime on net ecosystem exchange (NEE). Our results indicated that NEE exhibited nonlinear responses to rainfall treatments, and reached its peak under 20 mm in middle growing season. Further, the component fluxes of both NEE (i.e., gross primary productivity (GPP)) and ecosystem respiration (ER) illustrated nonlinear responses to treatment gradient, with peak values at 20 mm and 5 mm, respectively. Based on five-year eddy flux measurements, further analyses demonstrated that GPP and ER increased with increasing soil moisture, and net ecosystem carbon uptake (-1*NEE) was significantly stimulated due to a more enhanced GPP than ER, when soil moisture was above 8%. Additionally, we found that the response of root biomass was different from that of carbon fluxes to changes in rainfall patterns. Overall, these findings highlight the importance of both changes in rainfall regimes in controlling ecosystem C exchange and investigation of the potential threshold for ecosystem function shifts, which are crucial to further understand C cycles in grasslands.

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Section: Different Responses Of Carbon Fluxes and Root Biomasscontrasting

confidence: 99%

Section: Effect Of Change In Rainfall Patterns On Carbon Fluxesmentioning

confidence: 91%

Section: Different Responses Of Carbon Fluxes and Root Biomassmentioning

confidence: 98%

Section: Experimental Designmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Median to Strong Rainfall Intensity Favors Carbon Sink in a Temperate Grassland Ecosystem in China

Hao

Guo

et al. 2019

Sustainability

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Intra‐annual growing season climate variability drives the community intra‐annual stability of a temperate grassland by altering intra‐annual species asynchrony and richness in Inner Mongolia, China

Zhang

Bao

Hautier

et al. 2022

Ecology and Evolution

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Understanding the factors that regulate the functioning of our ecosystems in response to environmental changes can help to maintain the stable provisioning of ecosystem services to mankind. This is especially relevant given the increased variability of environmental conditions due to human activities. In particular, maintaining a stable production and plant biomass during the growing season (intra‐annual stability) despite pervasive and directional changes in temperature and precipitation through time can help to secure food supply to wild animals, livestock, and humans. Here, we conducted a 29‐year field observational study in a temperate grassland to explore how the intra‐annual stability of primary productivity is influenced by biotic and abiotic variables through time. We found that intra‐annual precipitation variability in the growing season indirectly influenced the community intra‐annual biomass stability by its negative effect on intra‐annual species asynchrony. While the intra‐annual temperature variability in the growing season indirectly altered community intra‐annual biomass stability through affecting the intra‐annual species richness. At the same time, although the intra‐annual biomass stability of the dominant species and the dominant functional group were insensitive to climate variability, they also promoted the stable community biomass to a certain extent. Our results indicate that ongoing intra‐annual climate variability affects community intra‐annual biomass stability in the temperate grassland, which has important theoretical significance for us to take active measures to deal with climate change.

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High frequency of extreme precipitation increases Stipa grandis biomass by altering plant and microbial nitrogen acquisition

et al. 2021

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Ecological responses to heavy rainfall depend on seasonal timing and multi‐year recurrence

Cited by 47 publications

References 88 publications

Median to Strong Rainfall Intensity Favors Carbon Sink in a Temperate Grassland Ecosystem in China

Median to Strong Rainfall Intensity Favors Carbon Sink in a Temperate Grassland Ecosystem in China

Intra‐annual growing season climate variability drives the community intra‐annual stability of a temperate grassland by altering intra‐annual species asynchrony and richness in Inner Mongolia, China

High frequency of extreme precipitation increases Stipa grandis biomass by altering plant and microbial nitrogen acquisition

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