A measure of spatial stratified heterogeneity

被引：1291
作者：
Wang, Jin-Feng [1 ]
Zhang, Tong-Lin [2 ]
Fu, Bo-Jie [3 ]
机构：
[1] Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, LREIS, Beijing 100101, Peoples R China
[2] Purdue Univ, Dept Stat, W Lafayette, IN 47907 USA
[3] Chinese Acad Sci, Ecoenvironm Sci Res Ctr, State Key Lab Urban & Reg Ecol, Beijing 100085, Peoples R China
来源：
ECOLOGICAL INDICATORS | 2016年 / 67卷
基金：
中国国家自然科学基金;
关键词：
Spatial stratified heterogeneity; q-Statistic; Probability density function; ASSOCIATION; ACCURACY;
D O I：
10.1016/j.ecolind.2016.02.052
中图分类号：
X176 [生物多样性保护];
学科分类号：
090705 ;
摘要：
Spatial stratified heterogeneity, referring to the within-strata variance less than the between strata variance, is ubiquitous in ecological phenomena, such as ecological zones and many ecological variables. Spatial stratified heterogeneity reflects the essence of nature, implies potential distinct mechanisms by strata, suggests possible determinants of the observed process, allows the representativeness of observations of the earth, and enforces the applicability of statistical inferences. In this paper, we propose a q-statistic method to measure the degree of spatial stratified heterogeneity and to test its significance. The q value is within [0,1] (0 if a spatial stratification of heterogeneity is not significant, and 1 if there is a perfect spatial stratification of heterogeneity). The exact probability density function is derived. The q-statistic is illustrated by two examples, wherein we assess the spatial stratified heterogeneities of a hand map and the distribution of the annual NDVI in China. (C) 2016 Elsevier Ltd. All rights reserved.
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页码：250 / 256
页数：7
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