干旱区生态环境知识资源中心(Arid): Ecological biomass allocation strategies in plant species with different life forms in a cold desert, China

Arid

	Ecological biomass allocation strategies in plant species with different life forms in a cold desert, China
	Fan Lianlian; Ding Junxiang; Ma Xuexi; Li Yaoming
来源期刊	Journal of Arid Land
ISSN	1674-6767
出版年	2019
卷号	11 期号:5 页码:729-739
英文摘要	Biomass allocation patterns among plant species are related to their adaptive ecological strategies. Ephemeral, ephemeroid and annual plant life forms represent three typical growth strategies of plants that grow in autumn and early spring in the cold deserts of China. These plants play an important role in reducing wind velocity in the desert areas. However, despite numerous studies, the strategies of biomass allocation among plant species with these three life forms remain contentious. In this study, we conducted a preliminary quadrat study during 2014-2016 in the southern part of the Gurbantunggut Desert, China, to investigate the allocation patterns of above-ground biomass (AGB) and below-ground biomass (BGB) at the individual level in 17 ephemeral, 3 ephemeroid and 4 annual plant species. Since ephemeral plants can germinate in autumn, we also compared biomass allocation patterns between plants that germinated in autumn 2015 and spring 2016 for 4 common ephemeral species. The healthy mature individual plants of each species were sampled and the AGB, BGB, total biomass (TB), leaf mass ratio (LMR) and root/shoot ratio (R/S) were calculated for 201 sample quadrats in the study area. We also studied the relationships between AGB and BGB of plants with the three different life forms (ephemeral, ephemeroid and annual). The mean AGB values of ephemeral, ephemeroid and annual plants were 0.806, 3.759 and 1.546 g/plant, respectively, and the mean BGB values were 0.106, 4.996 and 0.166 g/plant, respectively. The mean R/S value was significantly higher in ephemeroid plants (1.675) than in ephemeral (0.154) and annual (0.147) plants. The mean LMR was the highest in annual plants, followed by ephemeroid plants and ephemeral plants, reflecting the fact that annual plants allocate more biomass to leaves, associated with their longer life span. Biomass of ephemeral plants that germinated in autumn was significantly higher than those of corresponding plants that germinated in spring in terms of AGB, BGB and TB. However, the R/S value was similar in plants that germinated in autumn and spring. The slope of regression relationship between AGB and BGB differed significantly among the three plant life forms. These results support different biomass allocation hypotheses. Specifically, at the individual level, the AGB and BGB partitioning supports the allometric hypothesis for ephemeroid and annual plants and the isometric hypothesis for ephemeral plants.
英文关键词	above-ground biomass below-ground biomass plant life forms herbaceous species allometric hypothesis isometric hypothesis Gurbantunggut Desert
类型	Article
语种	英语
收录类别	CSCD
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:6595736
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/336196
作者单位	Fan Lianlian, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences;;Research Center for Ecology and Environment of Central Asia, Chinese Academy of Sciences;;Fukang Station of Desert Ecology, Chinese Academy of Sciences, ;;;;, Urumqi;;Urumqi;;Fukang, ;;;; 830011;;830011;;8315005.; Ding Junxiang, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, Sichuan 610041, China.; Ma Xuexi, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences;;Research Center for Ecology and Environment of Central Asia, Chinese Academy of Sciences, ;;, Urumqi;;Urumqi, ;; 830011;;830011.; Li Yaoming, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences;;Research Center for Ecology and Environment of Central Asia, Chinese Academy of Sciences, ;;, Urumqi;;Urumqi, ;; 830011;;830011.
推荐引用方式 GB/T 7714	Fan Lianlian,Ding Junxiang,Ma Xuexi,et al. Ecological biomass allocation strategies in plant species with different life forms in a cold desert, China[J],2019,11(5):729-739.
APA	Fan Lianlian,Ding Junxiang,Ma Xuexi,&Li Yaoming.(2019).Ecological biomass allocation strategies in plant species with different life forms in a cold desert, China.Journal of Arid Land,11(5),729-739.
MLA	Fan Lianlian,et al."Ecological biomass allocation strategies in plant species with different life forms in a cold desert, China".Journal of Arid Land 11.5(2019):729-739.