Multi-scale comparison of topographic complexity indices in relation to plant species richness

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	Multi-scale comparison of topographic complexity indices in relation to plant species richness
	Yu, Fangyuan 1; Wang, Tiejun 1; Groen, Thomas A.1; Skidmore, Andrew K.1; Yang, Xuefei2 ; Geng, Yuying 3; Ma, Keping 3
刊名	ECOLOGICAL COMPLEXITY
	2015-06-01
卷号	22 页码:93-101
关键词	Rhododendron Biodiversity Grain size DEM China Topographic complexity
通讯作者	Yu,FY (reprint author),POB 217,NL-7500 AE Enschede,Netherlands. ; f.yu@utwente.nl ; t.wang@utwente.nl
英文摘要	Topographic complexity is a key component of habitat, which has been linked to increased species richness in many ecological communities. It can be measured in various ways and it is unclear whether these different measurements are mutually comparable when they relate to plant species richness at different spatial scales. Using a densely sampled set of observations for Rhododendrons (406 species and 13,126 georeferenced records) as a test case, we calculated eight topographic complexity indices from a 250-m resolution digital elevation model and examined their correlations with Rhododendron species richness in China at seven spatial scales: grain sizes 0.05 degrees, 0.1 degrees, 0.25 degrees, 0.5 degrees, 1.0 degrees, 1.5 degrees, and 2.0 degrees. Our results showed that the eight topographic complexity indices were moderately to highly correlated with each other, and the relations between each pair of indices decreased with increasing grain size. However, with an increase in grain size, there was a higher correlation between topographic complexity indices and Rhododendron species richness. At finer scales (i.e. grain size <= 1 degrees), the standard deviation of elevation and range of elevation had significantly stronger correlations with Rhododendron species richness than other topographic complexity indices. Our findings indicate that different topographic complexity indices may have positive correlations with plant species richness. Moreover, the topographic complexity-species richness associations could be scale-dependent. In our case, the correlations between topographic complexity and Rhododendron species richness tended to be stronger at coarse-grained macro-habitat scales. We therefore suggest that topographic complexity index may serve as good proxy for studying the pattern of plant species richness at continental to global levels. However, choosing among topographic complexity indices must be undertaken with caution because these indices respond differently to grain sizes. (C) 2015 Elsevier B.V. All rights reserved.
学科主题	Ecology
类目[WOS]	Ecology
研究领域[WOS]	Environmental Sciences & Ecology
关键词[WOS]	ENVIRONMENTAL HETEROGENEITY ; DIVERSITY PATTERNS ; SPATIAL SCALES ; PALMS ARECACEAE ; CLIMATE-CHANGE ; RAIN-FOREST ; MODELS ; DETERMINANTS ; BIODIVERSITY ; GRADIENT
收录类别	SCI
语种	英语
WOS记录号	WOS:000356196900012
内容类型	期刊论文
源URL	[http://ir.kib.ac.cn/handle/151853/21312]
专题	昆明植物研究所_资源植物与生物技术所级重点实验室
作者单位	1.Univ Twente, Fac Geoinformat Sci & Earth Observat, Dept Nat Resources, NL-7500 AE Enschede, Netherlands 2.Chinese Acad Sci, Kunming Inst Bot, Lab Biogeog & Biodivers, Kunming 650204, Peoples R China 3.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China
推荐引用方式 GB/T 7714	Yu, Fangyuan,Wang, Tiejun,Groen, Thomas A.,et al. Multi-scale comparison of topographic complexity indices in relation to plant species richness[J]. ECOLOGICAL COMPLEXITY,2015,22:93-101.
APA	Yu, Fangyuan.,Wang, Tiejun.,Groen, Thomas A..,Skidmore, Andrew K..,Yang, Xuefei.,...&Ma, Keping.(2015).Multi-scale comparison of topographic complexity indices in relation to plant species richness.ECOLOGICAL COMPLEXITY,22,93-101.
MLA	Yu, Fangyuan,et al."Multi-scale comparison of topographic complexity indices in relation to plant species richness".ECOLOGICAL COMPLEXITY 22(2015):93-101.