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Contribution of plant traits to the explanation of temporal variations in carbon and water fluxes in semiarid grassland patches
Wang, Mengyu; Lu, Nan; Li, Qinglin; Fang, Weiwei; Fu, Bojie
2020-12
Source PublicationJOURNAL OF PLANT ECOLOGY
ISSN1752-9921
Volume13Issue:6Pages:773-784
AbstractAims Accurate prediction of spatiotemporal variations in carbon and water fluxes of heterogeneous landscape is critical to comprehensively address the effects of climate change and vegetation dynamics on landscape and regional carbon and water cycling. Methods A field study was conducted to characterize the seasonal variations in gas fluxes and explore their relationships with abiotic and biotic factors in a small grassland landscape. Daytime carbon and water fluxes including net ecosystem exchange, gross ecosystem productivity, ecosystem respiration and evapotranspiration (ET) were measured for three types of grassland patches over a growing season using the closed chamber method. The key plant trait variables were measured, based on which community weighted mean (CWM) and functional variance (FDvar) were calculated. Important Findings The results showed that the temporal variations in the carbon and water fluxes were regulated by meteorological, soil and community functional variables. Inclusion of the CWM and FDvar of plant trait measures greatly improved the degree of explanation of the predict models. Specific leaf area and leaf delta C-13 content (L delta C-13) were the most important trait variables in affecting the variations of the gas fluxes. CWMs indices had greater importance than FDvar indices in predicting the variation of the C fluxes but FDvar indices were more important for ET than C fluxes. Our findings demonstrated that mass ratio hypothesis and the complementary effects hypothesis are not mutually exclusive but have different relative importance for different ecosystem processes. Community functional traits played important roles in predicting the spatiotemporal variations of carbon and water fluxes in semiarid grassland.
Department城市与区域生态国家重点实验室
Keywordplant functional trait functional diversity carbon and water fluxes semiarid area Loess Plateau
Document Type期刊论文
Identifierhttp://ir.rcees.ac.cn/handle/311016/44251
Collection城市与区域生态国家重点实验室
Recommended Citation
GB/T 7714
Wang, Mengyu,Lu, Nan,Li, Qinglin,et al. Contribution of plant traits to the explanation of temporal variations in carbon and water fluxes in semiarid grassland patches[J]. JOURNAL OF PLANT ECOLOGY,2020,13(6):773-784.
APA Wang, Mengyu,Lu, Nan,Li, Qinglin,Fang, Weiwei,&Fu, Bojie.(2020).Contribution of plant traits to the explanation of temporal variations in carbon and water fluxes in semiarid grassland patches.JOURNAL OF PLANT ECOLOGY,13(6),773-784.
MLA Wang, Mengyu,et al."Contribution of plant traits to the explanation of temporal variations in carbon and water fluxes in semiarid grassland patches".JOURNAL OF PLANT ECOLOGY 13.6(2020):773-784.
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