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Seed Germination in Alpine Meadow Steppe Plants from Central Tibet in Response to Experimental Warming

文献类型：期刊论文

作者Wang, Xiangtao1,2,3; Niu, Ben1,2; Zhang, Xianzhou1,2,4; He, Yongtao1,2,4; Shi, Peili1,2,4; Miao, Yanjun3; Cao, Yanan1,2; Li, Meng1,2; Wang, Zhipeng1,2
刊名SUSTAINABILITY
出版日期2020-03-01
卷号12期号:5页码:14
关键词alpine grasslands climate warming incubator germination time seed germination percentage Tibetan Plateau
DOI10.3390/su12051884
通讯作者Zhang, Xianzhou(zhangxz@igsnrr.ac.cn)
英文摘要Clarifying the effects of climate warming on seed germination is critical for predicting plant community assembly and species renewal, especially in alpine grassland ecosystems where warming is occurring faster than in other biomes globally. We collected matured seeds of 19 common species from a typical alpine meadow steppe community in Central Tibet. Seeds were germinated in three incubators with manipulated day-night temperatures to impose three treatments: (1) theoretically optimal values of 25/15 degrees C, (2) temperatures observed in the field (control), and (3) a warming of 3 degrees C above the observed temperatures. We calculated seed germination percentage (SGP) and mean germination time (MGT) per species at different treatments. Our results showed that SGPs of Stipa capillacea, Kobresia macrantha, Potentilla saundersiana, Saussurea tibetica, Pedicularis kansuensis, and Androsace graminifolia were higher under the warming treatment than under control. Among them, the MGTs of S. capillacea, K. macrantha, and And. graminifolia were significantly shortened, while the MGT of Pe. kansuensis was significantly lengthened by warming of 3 degrees C. Significant decreases in MGT induced by warming were only observed for Festuca coelestis and Anaphalis xylorhiza. Additionally, the treatment with theoretically optimal temperatures restrained germination of Stipa purpurea, S. capillacea, F. coelestis, and Sa. tibetica seeds but promoted germination of K. macrantha, Astragalus strictus, P. saundersiana, Potentilla bifurca, Pe. kansuensis, Swertia tetraptera, Pleurospermum hedinii, and And. Graminifolia seeds, when compared with the control and warming treatments. Therefore, the response of seed germination to warming differs among alpine species, implying that future warming could result in significant changes in community assembly of alpine grasslands on the Tibetan Plateau.
WOS关键词CLIMATE ; TEMPERATURE ; DORMANCY ; REGENERATION ; RECRUITMENT ; MECHANISMS ; STRATEGIES ; PLATEAU ; DESERT ; COLD
资助项目National Natural Sciences Foundation of China[41761008] ; Ministry of Science and Technology of China[2016YFC0502001] ; Key Laboratory of Mountain Surface Processes and Ecological Regulation, Chinese Academy of Sciences[1190410616046]
WOS研究方向Science & Technology - Other Topics ; Environmental Sciences & Ecology
语种英语
WOS记录号WOS:000522470900185
出版者MDPI
资助机构National Natural Sciences Foundation of China ; Ministry of Science and Technology of China ; Key Laboratory of Mountain Surface Processes and Ecological Regulation, Chinese Academy of Sciences
源URL[http://ir.igsnrr.ac.cn/handle/311030/133741]  
专题中国科学院地理科学与资源研究所
通讯作者Zhang, Xianzhou
作者单位1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Lhasa Natl Ecol Res Stn, Beijing 100101, Peoples R China
2.UCAS, Beijing 100049, Peoples R China
3.Xizang Agr & Anim Husb Coll, Dept Anim Sci, Linzhi 860000, Peoples R China
4.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100190, Peoples R China
推荐引用方式
GB/T 7714		 Wang, Xiangtao,Niu, Ben,Zhang, Xianzhou,et al. Seed Germination in Alpine Meadow Steppe Plants from Central Tibet in Response to Experimental Warming[J]. SUSTAINABILITY,2020,12(5):14.
APA Wang, Xiangtao.,Niu, Ben.,Zhang, Xianzhou.,He, Yongtao.,Shi, Peili.,...&Wang, Zhipeng.(2020).Seed Germination in Alpine Meadow Steppe Plants from Central Tibet in Response to Experimental Warming.SUSTAINABILITY,12(5),14.
MLA Wang, Xiangtao,et al."Seed Germination in Alpine Meadow Steppe Plants from Central Tibet in Response to Experimental Warming".SUSTAINABILITY 12.5(2020):14.

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来源：地理科学与资源研究所

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