Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1111/avsc.12084 |
Using partial volumes to estimate available browse biomass in Southern African semi-arid savannas | |
Penderis, Caryn A.; Kirkman, Kevin P. | |
通讯作者 | Penderis, Caryn A. |
来源期刊 | APPLIED VEGETATION SCIENCE
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ISSN | 1402-2001 |
EISSN | 1654-109X |
出版年 | 2014 |
卷号 | 17期号:3页码:578-590 |
英文摘要 | Aims: With the increase of game farming in woody areas, as well as the pressing need to assess the spatial distribution of carbon, the quantification of available browse biomass has become an important subject to refine. We aimed to (1) calculate tree canopy volume (CVol) for varying tree canopy shapes and for strata within those shapes to cater for different herbivore browse heights, (2) develop a relation to estimate available browse of deciduous (micro-and mesophyllous) and evergreen (macrophyllous) semi-arid savanna tree species using our calculated CVols, and (3) demonstrate the application of the use of partial volumes and the resultant regression models in the determination of available browse biomass for browsing game species. Location: Four key savanna tree species were sampled in the open wooded grassland areas of three game reserves in northeastern KwaZulu-Natal, South Africa: Bonamanzi Game Park, Mun-Ya-Wana Private Game Reserve and Pongola Game Reserve. Methods: Tree CVol determination involved calculation of partial volumes, using the integration of a series of circles, allowing a wider range of tree shapes to be included. Non-linear regression was used to investigate the relation between available browse biomass of deciduous microphyllous Acacia nilotica, evergreen macrophyllous Euclea divinorum and Gymnosporia senegalensis and deciduous mesophyllous Spirostachys africana and their respective calculated partial CVols. Results: Exponential non-linear regression (Y = a + br(ln X)) of the natural logarithm of CVol data provided an accurate and precise description of the tree CVol-available browse biomass relation. Significant relations were obtained over a 2-yr period (2003-2004) for species-site models and general species models. The incorporation of tree foliage densities in available browse biomass estimation further improved model accuracy and precision. Conclusion: The general models provided an objective means of determining the browsing capacity of a tree population. In addition, estimation of carbon sequestration could be related to the model output, particularly when changes over time are recorded. Regular measurement of available browse comprises a useful monitoring tool to evaluate impact of animals on trees and shrubs. |
英文关键词 | Browse capacity Herbivory Non-destructive browse estimation Shrub biomass Tree biomass |
类型 | Article |
语种 | 英语 |
国家 | South Africa |
收录类别 | SCI-E |
WOS记录号 | WOS:000337725300019 |
WOS关键词 | FOOD PREFERENCES ; HERBIVORE ; RESOURCE ; GIRAFFE |
WOS类目 | Plant Sciences ; Ecology ; Forestry |
WOS研究方向 | Plant Sciences ; Environmental Sciences & Ecology ; Forestry |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/180745 |
作者单位 | Univ KwaZulu Natal, Discipline Grassland Sci, Sch Life Sci, ZA-3209 Scottsville, South Africa |
推荐引用方式 GB/T 7714 | Penderis, Caryn A.,Kirkman, Kevin P.. Using partial volumes to estimate available browse biomass in Southern African semi-arid savannas[J],2014,17(3):578-590. |
APA | Penderis, Caryn A.,&Kirkman, Kevin P..(2014).Using partial volumes to estimate available browse biomass in Southern African semi-arid savannas.APPLIED VEGETATION SCIENCE,17(3),578-590. |
MLA | Penderis, Caryn A.,et al."Using partial volumes to estimate available browse biomass in Southern African semi-arid savannas".APPLIED VEGETATION SCIENCE 17.3(2014):578-590. |
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