干旱区生态环境知识资源中心(Arid): Understanding changes in biocrust communities following phosphate mining in the Negev Desert

Arid

DOI	10.1016/j.envres.2021.112200
	Understanding changes in biocrust communities following phosphate mining in the Negev Desert
	Gabay, Talia; Rotem, Guy; Gillor, Osnat; Ziv, Yaron
通讯作者	Ziv, Y
来源期刊	ENVIRONMENTAL RESEARCH
ISSN	0013-9351
EISSN	1096-0953
出版年	2022
卷号	207
英文摘要	Biocrusts are key ecosystem engineers that are being destroyed due to anthropogenic disturbances such as trampling, agriculture and mining. In hyper-arid regions of the Negev Desert, phosphate has been mined for over six decades, altering the natural landscape over large spatial scales. In recent years, restoration-oriented practices were mandated in mining sites, however, the impact of such practices on the ecosystem, particularly the biocrust layer, has not been tested. Here, we evaluated post-mining biocrust bacterial communities and compared them to undisturbed (reference) biocrusts. We collected samples from four mining sites (each restored at a different year) and their corresponding reference sites. We hypothesized that post-mining bacterial communities would differ significantly from reference communities, given the slow regeneration of the biocrust. We also hypothesized that bacterial communities would vary among post-mining plots based on their restoration age. To test these hypotheses, we assessed the abundance and diversity of bacterial communities by sequencing the 16S rDNA and their photosynthetic potential by quantifying the abundance of cyanobacteria and chlorophyll a. The bacterial diversity was lower, and community composition differed significantly between post-mining and reference biocrusts. In addition, cyanobacteria abundances and chlorophyll a content were lower in post-mining biocrusts, indicating lower photosynthetic potential. However, no significant changes in bacterial communities were detected, regardless of the restoration age. We suggest that the practices implemented in the Negev mines may not support the recovery of the biocrust bacterial communities, particularly the cyanobacteria. Thus, active restoration measures are needed to accelerate the regeneration time of biocrusts at the hyper-arid Negev mines.
英文关键词	Biocrusts Hyper-arid desert Phosphate mining Mine site restoration Biocrust bacterial communities Cyanobacteria
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000766432400008
WOS关键词	BIOLOGICAL SOIL CRUSTS ; CYANOBACTERIAL INOCULATION ; RESTORATION ; DISTURBANCE ; RECOVERY ; MANIPULATIONS ; DIVERSITY ; ECOSYSTEM ; IMPACTS ; COVERS
WOS类目	Environmental Sciences ; Public, Environmental & Occupational Health
WOS研究方向	Environmental Sciences & Ecology ; Public, Environmental & Occupational Health
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/392493
推荐引用方式 GB/T 7714	Gabay, Talia,Rotem, Guy,Gillor, Osnat,et al. Understanding changes in biocrust communities following phosphate mining in the Negev Desert[J],2022,207.
APA	Gabay, Talia,Rotem, Guy,Gillor, Osnat,&Ziv, Yaron.(2022).Understanding changes in biocrust communities following phosphate mining in the Negev Desert.ENVIRONMENTAL RESEARCH,207.
MLA	Gabay, Talia,et al."Understanding changes in biocrust communities following phosphate mining in the Negev Desert".ENVIRONMENTAL RESEARCH 207(2022).