Related Experiment Video
Updated: Jun 25, 2026

Quantifying Corticolous Arthropods Using Sticky Traps
Published on: January 19, 2020
Comparing species assemblages via species accumulation curves
1Department of Statistics, University of California, Riverside, Riverside, California 92521, USA. cmao@stat.ucr.edu
Abstract:
Comparing species assemblages given incidence-based data is of importance in ecological studies, often done by a visual inspection of estimated species accumulation curves or by an ad hoc use of 95% pointwise confidence bands of these curves. It is shown that comparing species assemblages is a challenging problem. A chi(2) test is proposed. An adjustment using an eigenvalue decomposition is proposed to overcome computational difficulties. The bootstrap method is also suggested to approximate the distribution of the proposed test statistic. The eigenvalue adjusted (Eva) chi(2) test and the Eva-bootstrap test are assessed by a simulation study. Both the Eva-chi(2) and the Eva-bootstrap tests are applied to a study that involves two woody seedling species assemblages.
Related Concept Videos
Survival Curves
The Kaplan-Meier estimator is the most common method for constructing survival curves. This...
Comparing the Survival Analysis of Two or More Groups
Multi-species Conserved Sequences
Although the genome of each species varies greatly from each other, a few sequences are highly conserved. Such conserved DNA...
Life Histories
Evolutionary Relationships through Genome Comparisons
Ecological Succession

