Arid
DOI10.1016/j.jaridenv.2014.01.011
A 50 year study shows grass cover has increased in shrublands of semi-arid South Africa
Masubelele, Mmoto L.1; Hoffman, M. T.1; Bond, W. J.2; Gambiza, J.3
通讯作者Masubelele, Mmoto L.
来源期刊JOURNAL OF ARID ENVIRONMENTS
ISSN0140-1963
EISSN1095-922X
出版年2014
卷号104页码:43-51
英文摘要

In many parts of the world the boundaries between grassland and shrubland biomes have changed substantially over the course of the last century. Many are projected to shift further from being grass-dominated to shrub-dominated by 2050 under global climate change and land use change projections. This paper used long-term surveys and repeat photography to assess vegetation change at the shrubland-grassland ecotone in semi-arid, South Africa. Changes in several climate variables as well as in the cover of grasses and dwarf shrubs over three time periods (1962, 1989 and 2009) were investigated at eight localities within a broad 500 km ecotone between the Grassland and Nama-karoo biomes. Results showed that for most sites grass cover has increased and that dwarf shrub cover has decreased over time. This contradicts earlier views which warned against the expansion of dwarf shrublands in response to over-grazing as well as more recent views which suggest that more mesic biomes in the Karoo Midlands will contract in response to climate-induced aridification. The decline in stocking densities and more conservation-friendly land management practices together with an increase in large wet events in the Nama-karoo biome may have contributed to the increase in grass cover. (C) 2014 Elsevier Ltd. All rights reserved.


英文关键词Central interior of South Africa Climate change Ecotone Growth forms Long-term change Nama-karoo biome Overgrazing Rainfall Shrub expansion Temporal change and vegetation cover
类型Article
语种英语
国家South Africa
收录类别SCI-E
WOS记录号WOS:000335873000007
WOS关键词CLIMATE-CHANGE ; VEGETATION CHANGES ; CARBON-DIOXIDE ; EASTERN KAROO ; DYNAMICS ; RAINFALL ; CO2 ; CONSEQUENCES ; DEGRADATION ; DIVERSITY
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/2XILL650/183011
作者单位1.Univ Cape Town, Dept Biol Sci, Plant Conservat Unit, ZA-7701 Cape Town, South Africa;
2.Univ Cape Town, Dept Biol Sci, ZA-7701 Cape Town, South Africa;
3.Rhodes Univ, Dept Environm Sci, ZA-6139 Grahamstown, South Africa
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Masubelele, Mmoto L.,Hoffman, M. T.,Bond, W. J.,et al. A 50 year study shows grass cover has increased in shrublands of semi-arid South Africa[J],2014,104:43-51.
APA Masubelele, Mmoto L.,Hoffman, M. T.,Bond, W. J.,&Gambiza, J..(2014).A 50 year study shows grass cover has increased in shrublands of semi-arid South Africa.JOURNAL OF ARID ENVIRONMENTS,104,43-51.
MLA Masubelele, Mmoto L.,et al."A 50 year study shows grass cover has increased in shrublands of semi-arid South Africa".JOURNAL OF ARID ENVIRONMENTS 104(2014):43-51.
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