کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4521260 1625184 2011 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Above ground woody community attributes, biomass and carbon stocks along a rainfall gradient in the savannas of the central lowveld, South Africa
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم زراعت و اصلاح نباتات
پیش نمایش صفحه اول مقاله
Above ground woody community attributes, biomass and carbon stocks along a rainfall gradient in the savannas of the central lowveld, South Africa
چکیده انگلیسی

Enumeration of carbon stocks at benchmark sites is a necessary activity in assessing the potential carbon sequestration and possible generation of credits through restoration of intensively impacted sites. However, there is a lack of empirical studies throughout much of the savannas of sub-Saharan Africa, including South Africa. We report an estimation of species specific and site biomass and carbon stocks, and general vegetation structural attributes from three protected areas along a rainfall gradient in the central lowveld, South Africa. Estimates of biomass and carbon stocks were effected through destructive sampling to establish locally derived allometric equations. There was a gradient of increasing woody density, height of the canopy, number of species, density of regenerative stems and a greater proportion of stems in small size classes from the arid locality to the mesic locality, with the semi-arid locality being intermediate. The proportion of spinescent species decreased with increasing rainfall. The mesic locality was significantly more woody than either the arid or semi-arid sites, having double the biomass, four times the density and 40% higher basal area. Above ground carbon pools were also higher; carbon stocks were approximately 9 t/ha for the arid and semi-arid sites and 18 t/ha for the mesic site.

Research Highlights
► Contrast of above ground savanna woody community structure, biomass and carbon along a rainfall gradient.
► Development of allometric equations for common woody species.
► A gradient of increasing woody density, biomass, carbon stocks, canopy height, number of species, density of regenerative stems and a greater proportion of stems in small size classes with increasing mean annual rainfall.
► Above ground woody plant carbon pools of approximately 9 t/ha for the arid and semi-arid sites and 18 t/ha for the mesic site.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: South African Journal of Botany - Volume 77, Issue 1, January 2011, Pages 184–192
نویسندگان
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