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Updated: Mar 21, 2026

Automatic Image Processing to Determine the Community Size Structure of Riverine Macroinvertebrates

Automatic Image Processing to Determine the Community Size Structure of Riverine Macroinvertebrates

Published on: January 13, 2023

Increasing Functional or Phylogenetic Distance From Native Fish Communities Promotes Non-Native Fish Invasions in

Tao Xiang¹, Ignasi Arranz^2,3, Lucie Kuczynski^4,5

¹State Key Laboratory of Lake and Watershed Science for Water Security, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, China.

Global Change Biology

|March 20, 2026

Summary

This summary is machine-generated.

Non-native fish invasions are driven by functional and phylogenetic distances from native species, supporting Darwin's naturalization hypothesis. Climate and human factors also influence invasion success globally.

Keywords:

biological invasions environmental and anthropogenic drivers freshwater fishes invasion hypotheses multiple facets of biodiversity

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Area of Science:

Ecology
Invasive Species Biology
Conservation Biology

Background:

Biological invasions pose significant threats to ecosystems worldwide.
Understanding the drivers of invasions is crucial for effective management.
Previous research has focused on various hypotheses and factors, but global analyses for freshwater fishes are limited.

Purpose of the Study:

To explore ecological correlates of non-native freshwater fish establishment at a global scale.
To test biotic acceptance/resistance and Darwin's preadaptation/naturalization hypotheses.
To assess the influence of environmental and anthropogenic factors on fish invasions.

Main Methods:

Utilized a comprehensive database of 5245 freshwater fish species across 1411 river basins.
Quantified native community biodiversity using taxonomic, functional, and phylogenetic data.
Assessed relationships between native and non-native communities and extracted environmental/anthropogenic variables.

Main Results:

Darwin's naturalization hypothesis was primarily supported globally, with invasibility peaking when non-native species were functionally or phylogenetically distant from native communities.
Climatic factors were identified as key drivers of global fish invasion patterns.
Invasion determinants varied significantly across different biogeographic realms.

Conclusions:

Non-native fish establishment success is linked to functional and phylogenetic distinctiveness from native communities, suggesting exploitation of unique niches.
Climate and regional factors play critical roles in shaping fish invasion dynamics.
Further experimental studies are needed to establish causal relationships and validate correlational findings.