Arid
DOI10.1016/j.biocon.2009.11.008
How does grazing intensity affect different vegetation types in arid Succulent Karoo, South Africa? Implications for conservation management
Haarmeyer, Daniela H.; Schmiedel, Ute; Dengler, Juergen; Boesing, Britta M.
通讯作者Haarmeyer, Daniela H.
来源期刊BIOLOGICAL CONSERVATION
ISSN0006-3207
出版年2010
卷号143期号:3页码:588-596
英文摘要

The Knersvlakte in the Succulent Karoo Biome (South Africa) is known for its high plant diversity and endemism. In the course of establishing a conservation area there, we assessed baseline data for future management. We investigated the effects of grazing on the vegetation in terms of species diversity and composition as well as reproduction of selected species. Data were sampled on four adjacent farms, which were ungrazed, moderately or intensively grazed by sheep and goats. The data were collected in 27 quartz and 24 non-quartz plots, representing two major habitat types of the region. Within each of the 1000-m(2) plots, 100 subplots of 400 cm(2) size were sampled. ANOVAs revealed that species richness and abundance of endemic species on quartz fields decreased with grazing. Abundance of annuals did not increase significantly due to grazing. Fidelity analyses indicated that species composition differed between grazing intensities and that the ungrazed and moderately grazed plots both contained unique locally endemic habitat specialists. Reproduction of two, endemic dwarf shrubs Drosanthemum schoenlandianum and Argyroderma fissum (both Aizoaceae) increased under moderate grazing, which in the case of D. schoenlandianum was interpreted as an effect of grazing. We attribute the low number of seedlings and annuals on the moderately grazed farm to lower seasonal rainfall on these plots. From a conservation perspective, no or moderate grazing appear to be necessary to preserve plant diversity and vegetation patterns, and their underlying processes. (C) 2009 Elsevier Ltd. All rights reserved.


英文关键词Aizoaceae Biodiversity Herbivory Namaqualand Rangeland management Systematic conservation planning
类型Article
语种英语
国家Germany
收录类别SCI-E
WOS记录号WOS:000275946400008
WOS关键词CAPE FLORISTIC REGION ; PLANT DIVERSITY ; QUARTZ-FIELDS ; BIODIVERSITY ; NAMAQUALAND ; GROWTH ; RANGELAND ; HERBIVORY ; HABITAT ; DESERT
WOS类目Biodiversity Conservation ; Ecology ; Environmental Sciences
WOS研究方向Biodiversity & Conservation ; Environmental Sciences & Ecology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/163459
作者单位Univ Hamburg, Bioctr Klein Flottbek, D-22609 Hamburg, Germany
推荐引用方式
GB/T 7714
Haarmeyer, Daniela H.,Schmiedel, Ute,Dengler, Juergen,et al. How does grazing intensity affect different vegetation types in arid Succulent Karoo, South Africa? Implications for conservation management[J],2010,143(3):588-596.
APA Haarmeyer, Daniela H.,Schmiedel, Ute,Dengler, Juergen,&Boesing, Britta M..(2010).How does grazing intensity affect different vegetation types in arid Succulent Karoo, South Africa? Implications for conservation management.BIOLOGICAL CONSERVATION,143(3),588-596.
MLA Haarmeyer, Daniela H.,et al."How does grazing intensity affect different vegetation types in arid Succulent Karoo, South Africa? Implications for conservation management".BIOLOGICAL CONSERVATION 143.3(2010):588-596.
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