Pulse Brain · Growing Health Evidence Index
Peer-reviewedConventional

Separating the two components of abundance‐based dissimilarity: balanced changes in abundance vs. abundance gradients

Baselga A

Methods in Ecology and Evolution · 2013

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Summary

This methodological paper develops a novel partition of the widely-used Bray-Curtis dissimilarity index, decomposing it into two ecologically distinct components: balanced changes in species abundance and abundance gradients reflecting net loss or gain. The authors argue that this separation is critical because the traditional Bray-Curtis index conflates patterns that may arise from fundamentally different ecological processes. The application to tropical forest data demonstrates the utility of discriminating between species substitution and individual loss in interpreting biodiversity patterns.

Regional applicability

This is a methodological contribution to biodiversity measurement with no geographic focus; the approach is globally applicable to any assemblage-based dissimilarity analysis in ecology or related fields. The tropical forest example provides illustration but does not limit applicability.

Key measures

Bray-Curtis dissimilarity index components; balanced variation in abundance; abundance gradients; assemblage dissimilarity across spatial distance

Outcomes reported

The study presents a novel mathematical partition of the Bray-Curtis dissimilarity index into two distinct components: balanced variation in abundance (species substitution) and abundance gradients (individual loss). The partition is illustrated through application to tropical forest assemblage data across spatial distances.

Theme
Measurement & metrics
Subject
Measurement methods & nutrient profiling
Study type
Methodology
Study design
Methodological development with illustrative case study
Source type
Peer-reviewed study
Status
Published
Geography
United Kingdom
System type
Other
DOI
10.1111/2041-210x.12029
Catalogue ID
IRmoq83nfn-0d34c2

Topic tags

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