QQ客服 官方微博 反馈留言

	Assessment of carbon gains from biocrusts inhabiting a dunefield in the negev desert
	Kidron, Giora J.1; Li, Xin Rong2; Jia, Rong Liang2; Gao, Yan Hong2; Zhang, Peng2
刊名	Geoderma
	2015-09-01
卷号	253页码:102-110
关键词	Biological soil crusts Microbiotic crusts Photosynthesis Respiration
ISSN号	0016-7061
DOI	10.1016/j.geoderma.2015.04.015
通讯作者	Kidron, giora j.(kidron@mail.huji.ac.il)
英文摘要	Biocrusts play an important role in carbon (c) assimilation in arid and semiarid regions. in order to assess c gain in the crusted hallamish dune field, net photosynthesis (pn) and respiration (r) were measured at five crust types (a-e) which show a gradual increase in their chlorophyll content (with a < b < c < d < e). pn and r were calculated per chlorophyll a and b (hereafter a/b) content. total c input was calculated based on a large database that includes data on the temporal change in the chlorophyll content during the winter growing season, annual daylight and nighttime wetness duration and the cover of each crust type. the data show high similarity of pn and r per chlorophyll content for all crusts (0.9-1.1 and 0.5-0.6 gc (chla/b)(-1) h(-1), respectively). both pn and r showed a gradual increase with chlorophyll content with a approximate to b < c < d < e, with pn ranging between 0.0311 (for crust a) and 0.1784 (for crust e) gc m(-1) h(-1). total calculated c gain for crusts a-e assuming total crust cover ranged between 2.1-8.6 gc m(-2) a(-1) for crusts a-d and 50.90 gc m(-2) a(-1) for crust e, with total annual input into the crusted areas of the ecosystem and the entire ecosystem being 3.7 and 23 gc m(-2) a(-1), respectively. in comparison to net ecosystem c exchange (nee) from arid regions, our findings highlight the important role played by biocrusts in co2 sequestration and as c provider for an extreme arid ecosystem. yet, although a conservative approach was adopted, the data should be regarded as rough estimation only. in-situ field measurements are still required in order to substantiate the crust role in the annual c gain. (c) 2015 elsevier b.v. all rights reserved.
收录类别	SCI
WOS关键词	BIOLOGICAL SOIL CRUSTS ; SAND MICROBIOTIC CRUSTS ; CO2 EXCHANGE ; WATER-CONTENT ; TEMPERATURE RESPONSES ; BAJA-CALIFORNIA ; KALAHARI SANDS ; TENGGER DESERT ; DIOXIDE FLUXES ; SOUTHERN UTAH
WOS研究方向	Agriculture
WOS类目	Soil Science
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000355357900011
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2555000
专题	寒区旱区环境与工程研究所
通讯作者	Kidron, Giora J.
作者单位	1.Hebrew Univ Jerusalem, Inst Earth Sci, IL-91904 Jerusalem, Israel 2.Chinese Acad Sci, Shapotou Desert Res & Expt Stn, Cold & Arid Reg Environm & Engn Inst, Lanzhou 730000, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Kidron, Giora J.,Li, Xin Rong,Jia, Rong Liang,et al. Assessment of carbon gains from biocrusts inhabiting a dunefield in the negev desert[J]. Geoderma,2015,253:102-110.
APA	Kidron, Giora J.,Li, Xin Rong,Jia, Rong Liang,Gao, Yan Hong,&Zhang, Peng.(2015).Assessment of carbon gains from biocrusts inhabiting a dunefield in the negev desert.Geoderma,253,102-110.
MLA	Kidron, Giora J.,et al."Assessment of carbon gains from biocrusts inhabiting a dunefield in the negev desert".Geoderma 253(2015):102-110.

个性服务

查看访问统计

相关权益政策

暂无数据

收藏/分享

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。