Contrasting responses of plant above and belowground biomass carbon pools to extreme drought in six grasslands spanning an aridity gradient

Jaman, Md. Shahariar; Wu, Honghui; Yu, Qiang; Tan, Qiqi; Zhang, Yun-Long; Dam, Quoc Khanh; Muraina, Taofeek O.; Xu, Chi; Jing, Minghui; Jia, Xiaotong; Wang, Jie; He, Nianpeng; Luo, Wentao; Knapp, Alan K.; Wilkins, Kathryn; Collins, Scott L.; Luo, Yiqi

doi:10.1007/s11104-021-05258-4

Cited by 16 publications

(7 citation statements)

References 76 publications

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“…In our study, drought slightly decreased SOC content (Figure 4), which is similar to previous studies, which found drought decreased SOC, and thus affected C sequestration [10,55]. We considered that the root was an important cause of SOC content altering in this study (Figure 6b).…”

Section: Effect Of N Addition Drought and Their Interaction On Soil O...supporting

confidence: 90%

“…Meanwhile, the reduction in aboveground C input driven by drought may also be partly responsible for the impact on soil C stock. Some studies also showed that drought affected aboveground C process, and decreased the aboveground biomass input, further decreasing SOC accumulation [55,57]. The reduction in aboveground biomass in the severe drought treatment was also observed in our study (Figure 3a).…”

Section: Effect Of N Addition Drought and Their Interaction On Soil O...supporting

confidence: 87%

“…Högberg et al [60] showed that N addition might disproportionately increase leaf biomass, further increasing the probability of insufficient water supply, which may enhance the susceptibility of plant to N addition in the background of drought [51]. Under the condition of the plant's demand for water, which was caused by N addition, soil moisture changes might further affect soil C stocks [10,55]. Therefore, the suppressive effect of drought on SOC content would be more obvious in the context of aggravated N deposition in the future.…”

Section: Effect Of N Addition Drought and Their Interaction On Soil O...mentioning

confidence: 99%

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Drought Offsets the Potential Effects of Nitrogen Addition on Soil Respiration and Organic Carbon in Model Subtropical Forests

Lin

Huang

et al. 2022

Forests

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Nitrogen (N) deposition is increasingly aggravating and has significant impact on the processes of forest soil carbon (C) cycling. However, how N deposition affects forest soil C cycling processes in the scenario of future drought-frequent climate is still unclear. Therefore, we conducted a 2.5-year experiment at two levels of N addition treatments (control and N addition) and three levels of moisture (well-watered: ca. 80% of field capacity, moderate drought: ca. 60% of field capacity, severe drought: ca. 40% of field capacity) to investigate the impact of N addition, drought, and their interaction on soil respiration (Rs) and soil organic carbon (SOC) content. The results showed that N addition significantly increased Rs and SOC content, and severe drought decreased Rs and SOC content. In a well-watered condition, N addition significantly increased annual mean Rs, but in moderate drought and severe drought condition, N addition did not obviously affect Rs. In the control group, severe drought significantly decreased annual mean Rs by 61.5%, and decreased SOC content in 0–10 cm and in 10–20 cm by 3.0% and 1.6%, respectively. However, in the N addition group, moderate drought and severe drought significantly decreased annual mean Rs by 27.6% and 70.5%, respectively. Meanwhile, compared to the well-watered condition, severe drought significantly decreased SOC content in 0–10 cm and in 10–20 cm by 12.4% and 11.9% in the N addition group, respectively. Severe drought also decreased aboveground and belowground biomass, fine root biomass, MBC, and specific respiration in N addition group. The Rs and SOC content were positively correlated with aboveground biomass, belowground biomass, and fine root biomass. These results suggest that under future global change scenarios, severe drought might offset the promotive effects of N deposition on soil respiration and C sequestration in the young subtropical forest. Moreover, the N deposition may enhance the suppressive effect of drought on soil respiration and C sequestration in the future.

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Section: Effect Of N Addition Drought and Their Interaction On Soil O...supporting

confidence: 90%

Section: Effect Of N Addition Drought and Their Interaction On Soil O...supporting

confidence: 87%

Section: Effect Of N Addition Drought and Their Interaction On Soil O...mentioning

confidence: 99%

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Drought Offsets the Potential Effects of Nitrogen Addition on Soil Respiration and Organic Carbon in Model Subtropical Forests

Lin

Huang

et al. 2022

Forests

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“…Any changes in root would have a great impact on aboveground growth and eventually on yield. Numerous studies have investigated crop biomass and yield under soil moisture fluctuation, mainly under drought (Eziz et al, 2017;Griffiths et al, 2020;Liu et al, 2020;Jaman et al, 2022), flood (Glaz and Lingle, 2012;Chen et al, 2017;Meng et al, 2022), dryingrewetting (Wan et al, 2016;Farooq et al, 2020), etc. A certain degree of drought may stimulate root growth and increase the root-shoot ratio to better absorb water and nutrients, while severe drought would inhibit biomass accumulation (Uga et al, 2013;Kameoka et al, 2016;Chen et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Response of summer maize growth to drought-flood abrupt alternation

Weng²,

Yan³

et al. 2023

Front. Earth Sci.

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Extreme events normally have negative effects on crop growth. Many studies have reported findings on drought and flood events, while only sparse studies have focused on new types of extreme events, such as drought-flood abrupt alternation (DFAA). We attempted to gain an insight on the effects of DFAA over two-year field experiment on biomass, grain yield and quality, then simulated the yield loss to DFAA in history and future in summer maize planting area in the Northern Anhui Plain. Results show that DFAA significantly reduced root biomass and shoot biomass by 77.1% and 60.1% compared with that in the control systems. The negative effect lasted until mature stage. The grain yield loss was 14.1%–38.4% in different DFAA treatments. The numerical simulation reveals that the average annual yield loss due to DFAA has been increasing in the Northern Anhui Plain, with 21.19%–30.98% during 1964–2017, 14.10%–33.40% during 2020–2050. The spatial distribution of yield loss changed as well. This study increases our knowledge of the effects of DFAA on crop production and highlights the need to consider the targeted countermeasures.

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“…The wet tropics, for example, contain luxuriant vegetation because rainfall is plentiful and uniformly dispersed throughout the growth season (Jayaraman et al, 2021). According to Lambers et al (2008) forests are replaced by grasslands in areas where summer droughts are regular and severe, such as the Asian steppes and North American plains (Jaman et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Impacts of Climate Change on the Plant Water Interactions

2022

JRDM

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Climate change has an impact on ecosystem structure and function globally by altering the relationships between plants and soil organisms. Despite the fact that water is the most plentiful molecule on Earth's surface, water scarcity is the element that most severely limits global terrestrial plant production. Little is known about the climatic factors that drive phenological responses to climate change, and less attention has been paid to the fact that phenology is also responsive to other climatic. The aim of this study was to assess the impacts of climate change on plant water interactions. This study was guided by the specific objectives, which included examining the relationship between climate change and plant function; finding out the impacts of climate change on plant water interactions; and assessing how plants handle water scarcity. It was found that there was a linkage between climate change and plant function. The evaporation of water molecules from the outer surfaces of the mesophyll cells initiates the upward transpiration pull in the leaves, and respiring starches and sugars are created during photosynthetic processes using sunlight energy. Climate change enhanced the most enormous movement of species that has occurred without direct human intervention. It was also found that precipitation was a key driver of phenological changes in desert ecosystems. It was also found that drought was one of the most significant biotic challenges faced by plants, with considerable genetic variation in water deficit responses. There is a need for research on climate change to ease biodiversity conservation.

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Contrasting responses of plant above and belowground biomass carbon pools to extreme drought in six grasslands spanning an aridity gradient

Cited by 16 publications

References 76 publications

Drought Offsets the Potential Effects of Nitrogen Addition on Soil Respiration and Organic Carbon in Model Subtropical Forests

Drought Offsets the Potential Effects of Nitrogen Addition on Soil Respiration and Organic Carbon in Model Subtropical Forests

Response of summer maize growth to drought-flood abrupt alternation

Impacts of Climate Change on the Plant Water Interactions

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