Arid
DOI10.2989/10220119.2018.1531926
Vegetation responses to seasonal weather conditions and decreasing grazing pressure in the arid Succulent Karoo of South Africa()
Schmiedel, Ute; Oldeland, Jens
通讯作者Schmiedel, Ute
来源期刊AFRICAN JOURNAL OF RANGE & FORAGE SCIENCE
ISSN1022-0119
EISSN1727-9380
出版年2018
卷号35期号:3-4页码:303-310
英文摘要

The Succulent Karoo biome is a renowned centre of biodiversity and endemism in the arid winter rainfall region of South Africa that is threatened by climate change. On 20 permanently marked plots within a biodiversity observatory, species richness and cover were assessed annually from 2002 to 2017 during the growing season. We were interested, firstly, in whether the vegetation showed any trends in response to the strong decrease in grazing pressure, which occurred at the beginning of the monitoring period, and secondly, in the effect of seasonal climate on the vegetation. We analysed the responses of species richness and cover in four life forms to seasonal rainfall and the standardised precipitation-evapotranspiration index (SPEI) using linear mixed-effect models. Time had a positive effect on richness of annual species and a negative effect on cover of shrubs and annuals, which increased in response to SPEI and less strongly to rainfall during autumn and winter. Habitat did not have any effect and geophytes and perennial herbs did not show any significant response. The importance of SPEI during autumn and winter is discussed in relation to potential germination cues and the projected decrease in rainfall and increase in temperature during these seasons.


英文关键词biodiversity observatory Namaqualand rainfall SPEI standardised precipitation-evapotranspiration index vegetation change
类型Article
语种英语
国家Germany
收录类别SCI-E
WOS记录号WOS:000451149600014
WOS关键词WINTER-RAINFALL DESERT ; PLANT DIVERSITY ; FENCE-LINE ; NAMAQUALAND ; CLIMATE ; DYNAMICS ; TRENDS ; SHRUBS
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/2XILL650/207287
作者单位Univ Hamburg, Inst Plant Sci & Microbiol, Hamburg, Germany
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GB/T 7714
Schmiedel, Ute,Oldeland, Jens. Vegetation responses to seasonal weather conditions and decreasing grazing pressure in the arid Succulent Karoo of South Africa()[J],2018,35(3-4):303-310.
APA Schmiedel, Ute,&Oldeland, Jens.(2018).Vegetation responses to seasonal weather conditions and decreasing grazing pressure in the arid Succulent Karoo of South Africa().AFRICAN JOURNAL OF RANGE & FORAGE SCIENCE,35(3-4),303-310.
MLA Schmiedel, Ute,et al."Vegetation responses to seasonal weather conditions and decreasing grazing pressure in the arid Succulent Karoo of South Africa()".AFRICAN JOURNAL OF RANGE & FORAGE SCIENCE 35.3-4(2018):303-310.
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