生态学报2024，Vol.44Issue(12)：5412-5421,10.DOI:10.20103/j.stxb.202304020648
模拟增温对植物叶片δ13C值的影响:全球Meta分析
Effects of simulated warming on foliar δ13 C:a global Meta-analysis
摘要
Abstract
Global warming caused by massive greenhouse gas emissions is one of the most concerned environmental problems,which will directly affect the growth and development of plants,and then affect the community composition and even the structure ecosystem.Water use efficiency,as an important indicator of plant foliar regulation of water physiological process in virtue of photosynthesis,is the key to the relationship between carbon and water cycle of ecosystem,reflecting the adaptation strategies of vegetation ecosystem to the rapid adjustment of environment and the change of resources,and also is the focus of current global change research.Foliar δ13 C can be used as a key indicator to reflect long-term water use efficiency of plant,but the effect of global warming on foliar δ13 C value is still controversial.Due to the obvious limitations of previous point-scale studies,the global meta-analysis was used to integrate 371 groups of data from 51 literature worldwide to evaluate the effects of the simulated warming treatment on the foliar δ13 C value systematically in this study.The results showed that the simulated warming treatment could significantly increase the foliar δ13 C by 0.6%(P＜0.001)comparing with the conventional treatment group,and the effect sizes of foliar respiration rate(Rd),stomatal conductivity(Gs),net photosynthesis rate(Pn)and carbon(C)were 0.237,0.062,-0.140,and-0.019(P＜0.05),respectively.The simulated warming treatment enhanced photosynthesis and increased foliar respiration rate(Rd),which led to the continuous consumption of photosynthetic products and the decrease of foliar carbon(C),and finally the decrease of foliar Pn and the enrichment of δ13 C.Through further analysis of the affecting factors,it was found that the response of foliar δ13 C to the simulated warming treatment was mainly controlled by warming duration,elevation and average annual temperature(relative importance index was 1.00,0.97 and 0.92,respectively).In addition,different warming patterns had significantly different effects on the foliar δ13 C.The infrared radiators,heating wires and soil-core relocation treatment had positive effects on the foliar δ13 C(effect sizes were 0.70,0.44 and 0.35,respectively),but the shading screens and open-top chamber treatment had negative effects on it(effect sizes were-0.17 and-0.09,respectively).The conclusion of this study has important theoretical significance for further understanding the response characteristics of plant water use under the background of global change,in order to provide theoretical basis and effective support for future research of plant growth in this field.关键词
模拟增温/叶片δ13C/Meta分析/气孔导度/呼吸速率/植物水分利用效率Key words
simulated warming/foliar δ13 C/Meta-analysis/stomatal conductance/respiration rate/water use efficiency of plant引用本文复制引用
张莉莉,叶志成,廖凯华,朱青,赖晓明,郭长强..模拟增温对植物叶片δ13C值的影响:全球Meta分析[J].生态学报,2024,44(12):5412-5421,10.基金项目
国家自然科学基金面上项目(42171077) （42171077）
江苏省碳达峰碳中和科技创新专项资金项目(BK20220042) （BK20220042）
中国科学院青年创新促进会基金(2020317) （2020317）
