DOI: 10.1016/j.foreco.2013.12.032
Scopus记录号: 2-s2.0-84893196523
论文题名: Potential, realised, future distribution and environmental suitability for Pterocarpus angolensis DC in southern Africa
作者: De Cauwer V. ; Muys B. ; Revermann R. ; Trabucco A.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2014
卷: 315 起始页码: 211
结束页码: 226
语种: 英语
英文关键词: Climate change
; Ecological niche
; Maxent
; Pterocarpus angolensis
; Southern Africa
; Species distribution model
Scopus关键词: Ecological niche
; Maxent
; Pterocarpus angolensis
; Southern Africa
; Species distribution modeling
; Climate change
; Deforestation
; Population distribution
; calibration
; deciduous tree
; environmental response
; estimation method
; GIS
; growth rate
; harvesting
; land use change
; population modeling
; species diversity
; species richness
; woodland
; Deforestation
; Ecology
; Pterocarpus Angolensis
; Seasonal Variation
; Southern Africa
; Africa
英文摘要: The deciduous tree species Pterocarpus angolensis occurs in the dry woodlands of southern Africa and grows under a broad range of environmental conditions. It is threatened by overharvesting due to its valuable timber (Blood wood, Kiaat) and by land use changes. Information on the most suitable environmental conditions for the species is often old and anecdotal, while available data on its occurrence refer to range extent and not to distribution. Species distribution models (SDM) could provide more accurate information on distribution and environmental requirements and thereby assist sustainable management of this tree species.Maxent models were developed to estimate the potential, realised and future distribution of P. angolensis and to identify detailed environmental requirements. Occurrences data of the species were sourced from herbaria and other published sources; environmental data from global GIS databases. Relevant environmental predictors were selected through a jack-knife test of the first model runs. The addition of information on competing species, fires and deforestation was tested to determine realised distribution. Model quality was evaluated with an independent presence-absence dataset. The model was projected with two different climate change scenarios to study their effect on the distribution by 2080.Results show that a potential distribution map can be obtained with good discrimination of the presence of the species (AUC 0.83) and fairly good calibration (correlation coefficient 0.61). Range extent and environmental requirements are more detailed than those described in literature. The distribution of the species is mainly influenced by the amount of summer rainfall, by the minimum temperature in winter and by temperature seasonality. Potential and realised distributions are very similar, with Madagascar as major exception where the species can grow but does not occur. Adding the fire history of the last 13. years or the distribution maps of potentially competing species as predictor variables did not improve the distribution model. It did illustrate that P. angolensis is mainly found in areas with annual fire frequency below 45% and that only a few of the tested species show signs of competition. Using a forest cover map improved the realised distribution slightly (Kappa coefficient 0.64). Climate change can decrease the species range considerably, especially in the west, threatening species existence in Namibia and Botswana. On the other hand, the species' occurrence is predicted to increase in Zambia. © 2014 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/66120
Appears in Collections: 影响、适应和脆弱性
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作者单位: Polytechnic of Namibia, Department of Land Management, Private Bag 13388, Windhoek, Namibia; University of Leuven, Division Forest, Nature and Landscape, Celestijnenlaan 200E-2411, 3001 Leuven, Belgium; University of Hamburg, Biocentre Klein Flottbek, Department Biodiversity, Ecology and Evolution of Plants, Ohnhorststr. 18, 22609 Hamburg, Germany; Euro-Mediterranean Center on Climate Change, IAFENT Division, Via E. De Nicola 9, 07100 Sassari, Italy
Recommended Citation:
De Cauwer V.,Muys B.,Revermann R.,et al. Potential, realised, future distribution and environmental suitability for Pterocarpus angolensis DC in southern Africa[J]. Forest Ecology and Management,2014-01-01,315