Nitrogen addition amplifies the nonlinear drought response of grassland productivity to extended growing‐season droughts

Meng, Bo; Li, Junqin; Zhong, Shangzhi; Yao, Yuan; Yang, Xuechen; Collins, Scott L.; Sun, Wei

doi:10.1002/ecy.3483

Cited by 42 publications

(36 citation statements)

References 42 publications

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“…Terrestrial ecosystems are generally limited by nitrogen, so increased nitrogen could improve community productivity (Hooper and Johnson, 1999 ; Vitousek et al, 2002 ; Xu et al, 2016b ; Liu et al, 2019 ). Furthermore, several recent studies have demonstrated that N deposition could also improve the sensitivity of ANPP to precipitation reduction or increase (Bharath et al, 2020 ; Ma et al, 2020 ; Meng et al, 2021 ).…”

Section: Discussionmentioning

confidence: 99%

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Effect of Nitrogen Application on the Sensitivity of Desert Shrub Community Productivity to Precipitation in Central Asia

Zang

et al. 2022

Front. Plant Sci.

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Precipitation variability and nitrogen (N) deposition caused by anthropogenic activities could profoundly impact ecosystem productivity and carbon cycling. In desert ecosystems, vegetation is sensitive to changes in precipitation and N deposition. However, the impacts of large changes in precipitation, especially with a concurrent increase in N content, on plant community remain unclear. In this study, we carried out experiments to monitor the impacts of five precipitation levels and two N levels on the plant community function and composition from the Junggar desert in Central Asia during the period 2018–2019. Our results showed that: (1) Aboveground net primary production (ANPP) significantly increased with increasing precipitation, it followed a positive linear model under normal precipitation range, and nonlinear mode under extreme precipitation events; (2) N application led to an increase in ANPP, but did not significantly improve the sensitivity of ANPP to precipitation change; (3) Changes in N content and precipitation, and their impacts on ANPP were mainly driven by plant density. These results provide a theoretical basis for predict the future dynamics of terrestrial vegetation more accurately under climate change and increasing nitrogen deposition.

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Section: Discussionmentioning

confidence: 99%

“…Precipitation could affect the mineralization rate and uptake of N; thus, regulating N turnover and its effect on plant community structure and function (Gebauer and Ehleringer, 2000 ). In turn, N application could also affect the sensitivity of plant community structure and function to precipitation change (Meng et al, 2021 ).…”

Section: Introductionmentioning

confidence: 99%

Effect of Nitrogen Application on the Sensitivity of Desert Shrub Community Productivity to Precipitation in Central Asia

Zang

et al. 2022

Front. Plant Sci.

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“…Thus, simultaneous increases in one resource and decreases in another make it difficult to clarify how plants may alter their allocation strategies under global environmental change. For instance, although a decrease in root:shoot ratio explained greater drought sensitivity by plants in response to N addition, rapid adjustments in biomass allocation stimulated by drought can simultaneously act as a counterbalance to increase drought tolerance (Meng, Li, et al., 2021).…”

Section: Introductionmentioning

confidence: 99%

Soil N enrichment mediates carbon allocation through respiration in a dominant grass during drought

Meng

Yao

et al. 2022

Functional Ecology

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Carbon (C) allocation strategy plays a critical role in plant adaptability, which are also important to assess the productivity stability under environmental change. Based on optimal partitioning theory, we asked two questions: (1) How is plant C allocation within tissues affected by nutrient enrichment (N addition)? And (2) does long‐term N addition alter how plants allocate C under drought? To address these questions, we conducted a greenhouse experiment using the widespread perennial C3 grass, Leymus chinensis, under four treatments: ‘Watered’, ‘Dry’, ‘Watered + N’ and ‘Dry + N’. 13CO2 pulse labelling was used to trace C transport through the plant–soil system. We found that drought and N addition resulted in additive effects on C allocation. Greater above‐ground biomass under N addition resulted in higher C loss via above‐ground plant respiration, even under drought, which plays a more important role in the adjustment of root:shoot ratio than does the trade‐off between above‐ and below‐ground organs. Compared to the concept of active phenotype adjustment for maximized growth rate in traditional optimal partitioning theory, our results imply that pre‐drought allometry, which changes under long‐term resource addition, also determines how plants respond to drought and their adaptability to changing environmental conditions. Read the free Plain Language Summary for this article on the Journal blog.

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“…Terrestrial ecosystems are generally limited by nitrogen, so increased nitrogen could improve community productivity (Hooper and Johnson, 1999;Vitousek et al, 2002;Xu et al, 2016b;Liu et al, 2019). Furthermore, several recent studies have demonstrated that N deposition could also improve the sensitivity of ANPP to precipitation reduction or increase (Bharath et al, 2020;Ma et al, 2020;Meng et al, 2021).…”

Section: Interactive Effects Of Precipitation Change and N Applicatio...mentioning

confidence: 99%

“…Precipitation could affect the mineralization rate and uptake of N; thus, regulating N turnover and its effect on plant community structure and function (Gebauer and Ehleringer, 2000). In turn, N application could also affect the sensitivity of plant community structure and function to precipitation change (Meng et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

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Nitrogen addition amplifies the nonlinear drought response of grassland productivity to extended growing‐season droughts

Abstract: gen addition amplifies the nonlinear drought response of grassland productivity to extended growing-season droughts. Ecology 102(11):e03483.

Cited by 42 publications

References 42 publications

Effect of Nitrogen Application on the Sensitivity of Desert Shrub Community Productivity to Precipitation in Central Asia

Effect of Nitrogen Application on the Sensitivity of Desert Shrub Community Productivity to Precipitation in Central Asia

Soil N enrichment mediates carbon allocation through respiration in a dominant grass during drought

Data_Sheet_1.docx

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