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Dry-hot stress significantly reduced the nitrogenase activity of epiphytic cyanolichen
Liu, Shuai; Liu, Wenyao; Shi, Xianmeng; Li, Su; Hu, Tao; Song, Liang; Wu, Chuansheng
2018
Source PublicationSCIENCE OF THE TOTAL ENVIRONMENT
ISSN0048-9697
Volume619Issue:xPages:630-637
AbstractNitrogen (N) fixed by epiphytic cyanolichens (i.e. lichens that contain cyanobacterial symbionts) is thought to be the most important resource of this nutrient in some natural forest ecosystems. Although a great deal of work has been carried out to evaluate the biomass of this group as well as its contribution to ecosystem N budgets, empirical studies are needed to confirm the N input responses by cyanolichens under climate change conditions (dry-hot stress) as well as to determine the factors that control this process. We simulated climate change conditions by transplanting Lobaria retigera, a common cyanolichen in the area, to lower elevations, and measured nitrogenase activity in response to warmer and drier conditions. In addition, we conducted a series of laboratory and greenhouse experiments to determine the dominant factors influencing nitrogenase activity in this species. The results of this study show that mean annual nitrogenase activity at the higher site was 1.5 and 2.4 times that at the simulated warmer and drier (middle and lower) sites, respectively. Combining laboratory experimental conclusions, we show that thallus water content is a key factor determining the nitrogenase activity of L. retigera in early transplantation while insufficient carbon storage resulting from a combination of warming and desiccation was likely responsible for reducing nitrogenase activity in later months of the transplant experiment. The results of this study imply that the negative impact of climate change (dry-hot stress) on ecosystems not only impacts the distribution and growth of species, but also nutrient circles and budgets. (C) 2017 Elsevier B.V. All rights reserved.
Department其他
KeywordStipa-bouteloa Grassland Montane Rain-forest Broad-leaved Forest Ailao Mountains Southwest China Co2 Exchange New-zealand Biomass Production Nostoc-commune Boreal Forests
Subject AreaEnvironmental Sciences & Ecology
Language英语
Document Type期刊论文
Identifierhttp://ir.xtbg.org.cn/handle/353005/10786
Collection恢复生态学组
Corresponding AuthorLiu, Wenyao
Recommended Citation
GB/T 7714
Liu, Shuai,Liu, Wenyao,Shi, Xianmeng,et al. Dry-hot stress significantly reduced the nitrogenase activity of epiphytic cyanolichen[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2018,619(x):630-637.
APA Liu, Shuai.,Liu, Wenyao.,Shi, Xianmeng.,Li, Su.,Hu, Tao.,...&Wu, Chuansheng.(2018).Dry-hot stress significantly reduced the nitrogenase activity of epiphytic cyanolichen.SCIENCE OF THE TOTAL ENVIRONMENT,619(x),630-637.
MLA Liu, Shuai,et al."Dry-hot stress significantly reduced the nitrogenase activity of epiphytic cyanolichen".SCIENCE OF THE TOTAL ENVIRONMENT 619.x(2018):630-637.
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