A consumer's guide to nestedness analysis

被引:624
作者
Ulrich, Werner [1 ]
Almeida-Neto, Mario [2 ]
Gotelli, Nicholas J. [3 ]
机构
[1] Nicholas Copernicus Univ, Dept Anim Ecol, PL-87100 Torun, Poland
[2] Univ Brasilia, IB Dept Ecol, BR-70910900 Asa Norte, Brazil
[3] Univ Vermont, Dept Biol, Burlington, VT 05405 USA
基金
巴西圣保罗研究基金会;
关键词
NULL MODEL ANALYSIS; SPECIES COOCCURRENCE; SUBSET PATTERNS; COMMUNITY STRUCTURE; TEMPORAL TRENDS; PLANT; CONSERVATION; ASSEMBLAGES; COLONIZATION; TEMPERATURE;
D O I
10.1111/j.1600-0706.2008.17053.x
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
Nestedness analysis has become increasingly popular in the study of biogeographic patterns of species occurrence. Nested patterns are those in which the species composition of small assemblages is a nested subset of larger assemblages. For species interaction networks such as plant-pollinator webs, nestedness analysis has also proven a valuable tool for revealing ecological and evolutionary constraints. Despite this popularity, there has been substantial controversy in the literature over the best methods to define and quantify nestedness, and how to test for patterns of nestedness against an appropriate statistical null hypothesis. Here we review this rapidly developing literature and provide suggestions and guidelines for proper analyses. We focus on the logic and the performance of different metrics and the proper choice of null models for statistical inference. We observe that traditional 'gap-counting' metrics are biased towards species loss among columns (occupied sites) and that many metrics are not invariant to basic matrix properties. The study of nestedness should be combined with an appropriate gradient analysis to infer possible causes of the observed presence-absence sequence. In our view, statistical inference should be based on a null model in which row and columns sums are fixed. Under this model, only a relatively small number of published empirical matrices are significantly nested. We call for a critical reassessment of previous studies that have used biased metrics and unconstrained null models for statistical inference.
引用
收藏
页码:3 / 17
页数:15
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