Assessing the impacts of drought on net primary productivity of global land biomes in different climate zones

Liu, Yangyang; Zhou, Ronglei; Wen, Zhu; Khalifa, Muhammad; Zheng, Chengshi; Ren, Hao; Zhang, Zhaoying; Wang, Zhenqian

doi:10.1016/j.ecolind.2021.108146

Cited by 49 publications

(24 citation statements)

References 45 publications

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“…In general, the sensitivity of vegetation to water availability increased no matter whether moisture increased or decreased. Previous studies had observed the strongest effects of water stress on vegetation in arid and semi‐arid areas (Y. Y. Liu et al., 2021; H. Xu et al., 2018; Q. Zhang et al., 2017). Similarly, this study found that the correlation between vegetation GPP and SPEI was stronger and the variation in accumulated months was relatively greater in regions with moisture reduction (e.g., DMD regions) (Figure 8).…”

Section: Discussionmentioning

confidence: 96%

Increased Sensitivity of Global Vegetation Productivity to Drought Over the Recent Three Decades

Wei

Zhou

et al. 2023

JGR Atmospheres

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Section: Discussionmentioning

confidence: 96%

Increased Sensitivity of Global Vegetation Productivity to Drought Over the Recent Three Decades

Wei

Zhou

et al. 2023

JGR Atmospheres

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“…These observations highlight the need to understand the mechanisms of poplar forest growth suppression and die‐back in response to drought stress (Ji et al, 2020 ). Prolonged excessive water loss via transpiration not replaced by water uptake from the soil can result in drought‐induced tissue senescence and mortality, thereby converting individual plants and ecosystems from net sinks of CO 2 to net sources (Jardine et al, 2015 ; Liu et al, 2021 ; McDowell et al, 2008 ). Understanding the biological mechanisms and environmental thresholds that determine plant responses to drought stress is critical for predicting how the structure and function of managed ecosystems will respond to environmental change (Dewhirst et al, 2021 ; McDowell et al, 2008 ).…”

Section: Introductionmentioning

confidence: 99%

Cell wall ester modifications and volatile emission signatures of plant response to abiotic stress

Jardine

Dewhirst

Som

et al. 2022

Plant Cell & Environment

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Growth suppression and defence signalling are simultaneous strategies that plants invoke to respond to abiotic stress. Here, we show that the drought stress response of poplar trees (Populus trichocarpa) is initiated by a suppression in cell wall derived methanol (MeOH) emissions and activation of acetic acid (AA) fermentation defences. Temperature sensitive emissions dominated by MeOH (AA/MeOH <30%) were observed from physiologically active leaves, branches, detached stems, leaf cell wall isolations and whole ecosystems. In contrast, drought treatment resulted in a suppression of MeOH emissions and strong enhancement in AA emissions together with volatiles acetaldehyde, ethanol, and acetone. These drought‐induced changes coincided with a reduction in stomatal conductance, photosynthesis, transpiration, and leaf water potential. The strong enhancement in AA/MeOH emission ratios during drought (400%–3500%) was associated with an increase in acetate content of whole leaf cell walls, which became significantly 13C2‐labelled following the delivery of 13C2‐acetate via the transpiration stream. The results are consistent with both enzymatic and nonenzymatic MeOH and AA production at high temperature in hydrated tissues associated with accelerated primary cell wall growth processes, which are downregulated during drought. While the metabolic source(s) require further investigation, the observations are consistent with drought‐induced activation of aerobic fermentation driving high rates of foliar AA emissions and enhancements in leaf cell wall O‐acetylation. We suggest that atmospheric AA/MeOH emission ratios could be useful as a highly sensitive signal in studies investigating environmental and biological factors influencing growth‐defence trade‐offs in plants and ecosystems.

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“…The line of Qinling and Huaihe River (35° N) is the dividing line of China's climate; north of the line of Qinling and Huaihe River is defined as northern China, and south is defined as southern China (Wu et al, 2021). Northern China has four distinct seasons: cold with winters, hot summers, rain, and heat in the same period and precipitation concentrated in July–September, whereas southern China has hot summers and warm winters, with a smaller annual difference in temperature than the north and abundant precipitation (Zheng et al, 2021). The vegetation in northern China is represented by temperate deciduous broad‐leaved forests, whereas the representative vegetation in southern China is subtropical evergreen broad‐leaved forests.…”

Section: Discussionmentioning

confidence: 99%

Quantifying effects of different types of droughts on gross primary production in China

Shi

Ding

Zhe

et al. 2023

Hydrological Processes

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The increasing impact of drought stress on ecosystems with regard to climate change has received considerable attention, which has been demonstrated to have a time-lag effect on ecosystems. However, the time-lag effect on different types of droughts and gross primary production (GPP) at large regional scales remains unclear. Thus, using the GOSIF GPP product data of solar-induced chlorophyll fluorescence, the meteorological drought index (standardized precipitation evapotranspiration index [SPEI]), and the agricultural drought index (soil moisture deficit index [SMDI]) based on the soil moisture data obtained from the Global Land Data Assimilation System, the time-lag effect of regional drought and GPP and the contribution of drought to GPP variation were analysed in China from 2000 to 2018. Results showed that (1) China's annual GPP increased at an average rate of 9.26 g C m À2 y À1 . With regard to the average rate for each climate zone, the largest increase of 30.44 g C m À2 y À1 was observed in the southern subtropical region, and the smallest increase (4.01 g C m À2 y À1 ) was observed in the Qinghai-Tibetan plateau, with about 53.11% of the regions showing a significant upward trend.In addition, the significantly declining regions were primarily concentrated in urban areas, accounting for about 2.26% of China. (2) SPEI and GPP had an average lag time of 6.28 months, whereas SMDI and GPP had an average lag time of 7.17 months. The comparison demonstrated that SMDI had a greater influence on GPP than SPEI. (3) The average contribution rate of meteorological drought and agricultural drought to the decrease of GPP was 79.37% and 87.06%, and their average contribution rate to the increase of GPP was 39.11% and 50.57%, respectively. This study will provide comprehensive understanding of the effects of drought on carbon and water cycles in terrestrial ecosystems with regard to climate change.

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Assessing the impacts of drought on net primary productivity of global land biomes in different climate zones

Cited by 49 publications

References 45 publications

Increased Sensitivity of Global Vegetation Productivity to Drought Over the Recent Three Decades

Increased Sensitivity of Global Vegetation Productivity to Drought Over the Recent Three Decades

Cell wall ester modifications and volatile emission signatures of plant response to abiotic stress

Quantifying effects of different types of droughts on gross primary production in China

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