干旱区生态环境知识资源中心(Arid): Drought as a driver of vegetation change in Succulent Karoo rangelands, South Africa

Arid

DOI	10.2989/10220119.2021.1992501
	Drought as a driver of vegetation change in Succulent Karoo rangelands, South Africa
	Milton, S. J.; Petersen, H.; Nampa, G.; van der Merwe, H.; Henschel, J. R.
通讯作者	Milton, SJ (corresponding author)，South African Environm Observat Network SAEON, Arid Lands Node, Kimberley, South Africa. ; Milton, SJ (corresponding author)，Wolwekraal Conservat & Res Org, Prince Albert, South Africa.
来源期刊	AFRICAN JOURNAL OF RANGE & FORAGE SCIENCE
ISSN	1022-0119
EISSN	1727-9380
出版年	2022-02
英文摘要	We document changes in rangeland during a prolonged drought in the arid Karoo. Rangeland in this arid region is species-rich and dominated by a mixture of long-lived succulent and non-succulent shrubs. Ranching has led to the domination of vegetation by less palatable species, and resting does little to restore diversity because most species are long-lived. Between 2015 and 2020, a combination of rising temperatures and low rainfall reduced vegetation cover and grazing potential throughout the Karoo. Mortality varied among species, habitat and with predrought rangeland condition, but appeared independent of size class. Growth form was not a good predictor of drought survival, although vegetation dominated by non-succulent shrub species before the drought was dominated by a succulent shrub species toward the end of the drought. Dieback was greater on deep soil than in drainage lines and on stony rises. Historically degraded landscapes lost relatively more vegetation cover and grazing capacity than areas protected from grazing. By reducing dominant, long-lived, non-forage shrub species, drought appears to be changing the composition of the vegetation to a state that may have higher grazing potential, particularly if livestock numbers are reduced and reseeding is carried out during the recovery period.
英文关键词	climate change dieback drought-tolerance dryland landuse
类型	Article ; Early Access
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000755631300001
WOS关键词	ARID KAROO ; PLANT MORTALITY ; CLIMATE-CHANGE ; DYNAMICS ; ECOSYSTEM ; PATTERNS ; SURVIVAL ; SHRUBS ; GROWTH ; BIODIVERSITY
WOS类目	Ecology ; Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/377276
作者单位	[Milton, S. J.; Petersen, H.; Nampa, G.; van der Merwe, H.; Henschel, J. R.] South African Environm Observat Network SAEON, Arid Lands Node, Kimberley, South Africa; [Milton, S. J.] Wolwekraal Conservat & Res Org, Prince Albert, South Africa; [Petersen, H.; van der Merwe, H.] Univ Cape Town, Dept Biol Sci, Plant Conservat Unit, Cape Town, South Africa; [Henschel, J. R.] Univ Free State, Ctr Environm Management, Bloemfontein, South Africa
推荐引用方式 GB/T 7714	Milton, S. J.,Petersen, H.,Nampa, G.,et al. Drought as a driver of vegetation change in Succulent Karoo rangelands, South Africa[J],2022.
APA	Milton, S. J.,Petersen, H.,Nampa, G.,van der Merwe, H.,&Henschel, J. R..(2022).Drought as a driver of vegetation change in Succulent Karoo rangelands, South Africa.AFRICAN JOURNAL OF RANGE & FORAGE SCIENCE.
MLA	Milton, S. J.,et al."Drought as a driver of vegetation change in Succulent Karoo rangelands, South Africa".AFRICAN JOURNAL OF RANGE & FORAGE SCIENCE (2022).