干旱区生态环境知识资源中心(Arid): An interpolated biogeographical framework for tropical Africa using plant species distributions and the physical environment

Arid

DOI	10.1111/jbi.13976
	An interpolated biogeographical framework for tropical Africa using plant species distributions and the physical environment
	Marshall, Cicely A. M.; Wieringa, Jan J.; Hawthorne, William D.
通讯作者	Marshall, CAM
来源期刊	JOURNAL OF BIOGEOGRAPHY
ISSN	0305-0270
EISSN	1365-2699
英文摘要	Aim Existing phytogeographical frameworks for tropical Africa lack either spatial completeness, unit definitions smaller than the regional scale or a quantitative approach. We investigate whether physical environmental variables can be used to interpolate floristically defined vegetation units, presenting an interpolated, hierarchical, quantitative phytogeographical framework for tropical Africa, which is compared to previously defined regions. Location Tropical mainland Africa 24 degrees N to 24 degrees S. Taxon 31,046 vascular plant species and infraspecific taxa. Methods We calculate a betasim dissimilarity matrix from a comprehensive whole-flora database of plant species distributions. We investigate environmental correlates of floristic turnover with local non-metric multidimensional scaling. We derive a hierarchical biogeographical framework by clustering the dissimilarity matrix. The framework is modelled using a classification decision tree method and 12 physical environmental variables to interpolate and increase the resolution of the framework across the study region. Results Floristic turnover is related strongly to water availability and temperature, with smaller contributions from land cover, topographic ruggedness and lithology. Region can be predicted with 90% accuracy by the model. We define 19 regions and 99 districts. We find a novel arrangement of the arid regions. Regional subdivision within the savanna biome is supported with minor variation to borders. Within the forests of west and central Africa, our whole-flora gridded regionalization supports the divisions identified by a previous analysis of trees only. Main conclusions Physical environmental variables can be used to predict floristically defined vegetation units with very high accuracy, and the approach could be pursued for other incompletely sampled taxa and areas outside of tropical Africa. Geographical coherence is higher than in previous quantitative phytoregional definitions. For most tropical African vascular plant species, we provide predictions of which species will occur within each mapped district and region of tropical Africa. The framework should be useful for future studies in ecology, evolution and conservation.
英文关键词	biogeographical region CART cluster analysis ecoregion floristic district phytogeography plants Random Forest species distribution tropical Africa vegetation classification
类型	Article ; Early Access
语种	英语
开放获取类型	Other Gold, Green Published
收录类别	SCI-E
WOS记录号	WOS:000574413900001
WOS关键词	VEGETATION CHANGES ; REGIONALIZATION ; REGIONS ; FOREST ; CLASSIFICATION ; BIOQUALITY ; PATTERNS ; WORLDS
WOS类目	Ecology ; Geography, Physical
WOS研究方向	Environmental Sciences & Ecology ; Physical Geography
来源机构	University of Oxford
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/328307
作者单位	[Marshall, Cicely A. M.] Univ Cambridge, Dept Plant Sci, Downing St, Cambridge CB2 3EA, England; [Wieringa, Jan J.] Natl Herbarium Netherlands, Naturalis Biodivers Ctr, Leiden, Netherlands; [Hawthorne, William D.] Univ Oxford, Dept Plant Sci, Oxford, England
推荐引用方式 GB/T 7714	Marshall, Cicely A. M.,Wieringa, Jan J.,Hawthorne, William D.. An interpolated biogeographical framework for tropical Africa using plant species distributions and the physical environment[J]. University of Oxford.
APA	Marshall, Cicely A. M.,Wieringa, Jan J.,&Hawthorne, William D..
MLA	Marshall, Cicely A. M.,et al."An interpolated biogeographical framework for tropical Africa using plant species distributions and the physical environment".JOURNAL OF BIOGEOGRAPHY