Local Wood Demand, Land Cover Change and the State of Albany Thicket on an Urban Commonage in the Eastern Cape, South Africa

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• 作者：M. M. Stickler (1) (2)
  C. M. Shackleton (1)
  
  1. Department of Environmental Science ; Rhodes University ; Grahamstown ; 6140 ; South Africa
  2. United States Agency for International Development ; Washington ; DC ; USA
  
• 关键词：Biomass ; Carbon ; Land cover change ; Deforestation ; Firewood ; Soils ; Thicket ; Woody plants
• 刊名：Environmental Management
• 出版年：2015
• 出版时间：February 2015
• 年：2015
• 卷：55
• 期：2
• 页码：411-422
• 全文大小：648 KB
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• 刊物类别：Earth and Environmental Science
• 刊物主题：Environment
  Environmental Management
  Ecology
  Nature Conservation
  Atmospheric Protection, Air Quality Control and Air Pollution
  Forestry Management
  Waste Water Technology, Water Pollution Control, Water Management and Aquatic Pollution
  
• 出版者：Springer New York
• ISSN：1432-1009

文摘

Understanding the rates and causes of land-use change is crucial in identifying solutions, especially in sensitive landscapes and ecosystems, as well as in places undergoing rapid political, socioeconomic or ecological change. Despite considerable concern at the rate of transformation and degradation of the biodiversity-rich Albany Thicket biome in South Africa, most knowledge is gleaned from private commercial lands and state conservation areas. In comparison, there is limited work in communal areas where land uses include biomass extraction, especially for firewood and construction timber. We used aerial photographs to analyze land use and cover change in the high- and low-use zones of an urban commonage and an adjacent protected area over almost six decades, which included a major political transition. Field sampling was undertaken to characterize the current state of the vegetation and soils of the commonage and protected area and to determine the supply and demand for firewood and construction timber. Between the 1950s and 1980s, there was a clear increase in woody vegetation cover, which was reversed after the political transition in the mid-1990s. However, current woody plant standing stocks and sustainable annual production rates are well above current firewood demand, suggesting other probable causes for the decline in woody plant cover. The fragmentation of woody plant cover is paralleled by increases in grassy areas and bare ground, an increase in soil compaction, and decreases in soil moisture, carbon, and nutrients.