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Updated: Sep 17, 2025

Dissection and Flat-mounting of the Threespine Stickleback Branchial Skeleton
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Consistent energy-diversity relationships in terrestrial vertebrates.

Marco Túlio P Coelho1, Elisa Barreto1, José Alexandre F Diniz-Filho2

  • 1Swiss Federal Institute for Forest, Snow and Landscape Research, Birmensdorf, Switzerland.

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Summary

Higher energy environments support more species, contrary to some ecological theories. This study clarifies the relationship between species richness and energy factors by analyzing climate conditions and terrestrial vertebrates globally.

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Area of Science:

  • Ecology
  • Biodiversity Science
  • Biogeography

Background:

  • Ecological theory posits a positive link between environmental energy and species richness.
  • Empirical evidence often shows inconsistencies, challenging this long-standing hypothesis.
  • Geographical factors can confound the observed relationship between species richness and energy.

Purpose of the Study:

  • To disentangle the direct effects of climate variables on species richness.
  • To investigate the relationship between energy-related factors and species richness, accounting for geographical influences.
  • To clarify ecological theory using a climate space perspective.

Main Methods:

  • Comparative analysis of species richness across diverse climate conditions.
  • Global analysis of terrestrial vertebrate species.
  • Statistical methods to isolate climate effects from area and isolation impacts.

Main Results:

  • Clear and consistent relationships were found between energy-related factors and species richness.
  • Temperature, precipitation, and primary productivity directly correlate with species richness.
  • The influence of climate space was effectively separated from geographical confounding factors.

Conclusions:

  • The study confirms a direct positive relationship between energy availability and species richness in terrestrial vertebrates.
  • Adopting a climate space perspective is crucial for advancing biodiversity research.
  • Findings provide critical insights into biodiversity patterns and their response to environmental change.