Leaf Area Rather Than Photosynthetic Rate Determines the Response of Ecosystem Productivity to Experimental Warming in an Alpine Steppe

Li, Fēi; Peng, Yunfeng; Zhang, Dianye; Yang, Guibiao; Fang, Kai; Wang, Guanqin; Wang, Jun; Yu, Jianchuan; Zhou, Guoying; Yang, Yuanhe

doi:10.1029/2019jg005193

Cited by 26 publications

(17 citation statements)

References 58 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Each OTC comprised an aluminum frame fitted with 8-mm-thick transparent plexiglass boards with a light transmittance >92%. Each unit covered an area of 6.4 m 2 , with a bottom side length of 1.15 m, and was shaped as a regular octagon with an outer diameter of 3 m. The height of OTCs is higher than others (2 vs. 0.5 m) (Li et al, 2019;Chen et al, 2020), and the sides are perpendicular to the ground in order to reduce the effect of precipitation on soil moisture. Window and door were arranged in the north and south sides, which could reduce the amplitude of warming and to avoid excessive overheating in the middle of the day.…”

Section: Experimental Designmentioning

confidence: 99%

Leaf and Community Photosynthetic Carbon Assimilation of Alpine Plants Under in-situ Warming

Zhou

et al. 2021

Front. Plant Sci.

View full text Add to dashboard Cite

The Tibetan Plateau is highly sensitive to elevated temperatures and has experienced significant climate warming in the last decades. While climate warming is known to greatly impact alpine ecosystems, the gas exchange responses at the leaf and community levels to climate warming in alpine meadow ecosystems remain unclear. In this study, the alpine grass, Elymus nutans, and forb, Potentilla anserina, were grown in open-top chambers (OTCs) for 3 consecutive years to evaluate their response to warming. Gas exchange measurements were used to assess the effects of in-situ warming on leaf- and community-level photosynthetic carbon assimilation based on leaf photosynthetic physiological parameters. We introduced a means of up-scaling photosynthetic measurements from the leaf level to the community level based on six easily measurable parameters, including leaf net photosynthetic rate, fresh leaf mass per unit leaf area, fresh weight of all plant leaves in the community, the percentage of healthy leaves, the percentage of received effective light by leaves in the community, and community coverage. The community-level photosynthetic carbon assimilation and productivity all increased with warming, and the net photosynthetic rate at the leaf level was significantly higher than at the community level. Under elevated temperature, the net photosynthetic rate of E. nutans decreased, while that of P. anserina increased. These results indicated that climate warming may significantly influence plant carbon assimilation, which could alter alpine meadow community composition in the future.

show abstract

Section: Experimental Designmentioning

confidence: 99%

Leaf and Community Photosynthetic Carbon Assimilation of Alpine Plants Under in-situ Warming

Zhou

et al. 2021

Front. Plant Sci.

View full text Add to dashboard Cite

show abstract

“…In addition to these environmental factors, warming may affect CUEe and its components by modulating elements of community structure or vegetation growth, including community composition (Yang et al., 2011; Zhu et al., 2020), plant phenology (Ganjurjav et al., 2020; Zhu et al., 2017) and species physiology (Dorji et al., 2013; N. Li et al., 2011; F. Li et al., 2019). The nonlinear responses of vegetation coverage and biomass to multiple‐level warming cause corresponding changes in ER and GEP (Ganjurjav et al., 2016; N. Li et al., 2011) and, therefore, CUEe.…”

Section: Introductionmentioning

confidence: 99%

Multiple‐scale negative impacts of warming on ecosystem carbon use efficiency across the Tibetan Plateau grasslands

Chen

Zhang

Zhu

et al. 2020

Global Ecol. Biogeogr.

View full text Add to dashboard Cite

Aim Ecosystem carbon use efficiency (CUEe) is a core parameter of ecosystem process models, but its relationships with climate are still uncertain, especially for ecosystems with harsh environments. Large inconsistencies in climate impacts on the CUEe have been reported among various spatial scales. The goal of this study was to examine whether warming promotes or restricts the CUEe and whether the CUEe responds to a warming gradient in a linear or nonlinear manner. Location Tibetan Plateau. Time period 2000–2018. Major taxa studied Alpine grassland ecosystem. Methods We integrated multiple‐source data of carbon fluxes and CUEe, including warming experiments at a site scale, eddy covariance observations at a landscape scale and synthesized warming experiments and ecosystem process models at a regional scale. Next, we deployed a statistical model to examine the warming impacts on the CUEe across scales; the effects of biotic and abiotic factors on the CUEe and its components were summarized based on the results of standardized major axis tests and routines, structural equation modelling and nonlinear models. Results This study reported a suppressive warming impact on the CUEe, which followed a nonlinear curve with severe inhibition in the high‐level warming treatment. With a warming threshold of 1.5–2.0°C, CUEe response patterns transitioned from no change to a significant decrease. The restriction effects can be ascribed to the joint adverse and asymmetric effects of warming on CUEe components under multiple‐level warming. Warming‐modified relationships among CUEe components and the nonlinear effects of biotic and abiotic factors led to the nonlinear responses of CUEe to warming. Main conclusions This study revealed suppressive and nonlinear effects of warming on the CUEe, including especially dramatic CUEe decreases with high‐level warming. These findings are critical for optimizing model parameters and improving predictions of the carbon sequestration capacity of alpine grasslands.

show abstract

“…Here, although the net photosynthetic rate (per unit leaf area) increased in S. canadensis when exposed to warming (in monoculture), in A. argyi stomatal conductance and chlorophyll decreased under higher temperatures ( Figure 2 ). Therefore, photosynthetic performance of A. argyi was inhibited in response to warming, which could be due to a reduction in leaf area (and thus photosynthetic area) under higher temperatures, resulting in an overall decline in plant productivity and biomass [ 58 ].…”

Section: Discussionmentioning

confidence: 99%

Non-Additive Effects of Environmental Factors on Growth and Physiology of Invasive Solidago canadensis and a Co-Occurring Native Species (Artemisia argyi)

Yang

Cui

et al. 2022

Plants

View full text Add to dashboard Cite

Changes in environmental factors, such as temperature and UV, have significant impacts on the growth and development of both native and invasive plant species. However, few studies examine the combined effects of warming and enhanced UV on plant growth and performance in invasive species. Here, we investigated single and combined effects of warming and UV radiation on growth, leaf functional and photosynthesis traits, and nutrient content (i.e., total organic carbon, nitrogen and phosphorous) of invasive Solidago canadensis and its co-occurring native species, Artemisia argyi, when grown in culture racks in the greenhouse. The species were grown in monoculture and together in a mixed community, with and without warming, and with and without increased UV in a full factorial design. We found that growth in S. canadensis and A. argyi were inhibited and more affected by warming than UV-B radiation. Additionally, there were both antagonistic and synergistic interactions between warming and UV-B on growth and performance in both species. Overall, our results suggested that S. canadensis was more tolerant to elevated temperatures and high UV radiation compared to the native species. Therefore, substantial increases in temperature and UV-B may favour invasive S. canadensis over native A. argyi. Research focusing on the effects of a wider range of temperatures and UV levels is required to improve our understanding of the responses of these two species to greater environmental variability and the impacts of climate change.

show abstract

Leaf Area Rather Than Photosynthetic Rate Determines the Response of Ecosystem Productivity to Experimental Warming in an Alpine Steppe

Cited by 26 publications

References 58 publications

Leaf and Community Photosynthetic Carbon Assimilation of Alpine Plants Under in-situ Warming

Leaf and Community Photosynthetic Carbon Assimilation of Alpine Plants Under in-situ Warming

Multiple‐scale negative impacts of warming on ecosystem carbon use efficiency across the Tibetan Plateau grasslands

Non-Additive Effects of Environmental Factors on Growth and Physiology of Invasive Solidago canadensis and a Co-Occurring Native Species (Artemisia argyi)

Contact Info

Product

Resources

About