Ecological Drivers of Carnivoran Body Shape Evolution

Area of Science:

• Evolutionary Biology
• Comparative Anatomy
• Mammalogy

Background:

• Morphological diversity is often linked to ecological adaptations.
• The relationship between distinct ecologies and body shape evolution is understudied in mammals at macroevolutionary scales.

Purpose of the Study:

• To investigate how locomotor, hunting, and dietary ecologies influenced body shape evolution in carnivorans.
• To test adaptive models against clade-based evolutionary shifts in body shape.

Main Methods:

• Analysis of morphological variation in carnivorans.
• Testing of evolutionary models incorporating ecological trait regimes.
• Examination of allometric patterns in aquatic and terrestrial carnivorans.

Main Results:

• Adaptive models with ecological regimes poorly predicted carnivoran body shape.
• Clade-based evolutionary shifts best explained body shape variation.
• Aquatic and terrestrial carnivorans showed opposing allometric patterns in body shape.

Conclusions:

• Carnivoran body shape evolution is influenced by complex interactions beyond simple ecological regimes.
• Phylogeny and environmental constraints (e.g., gravity in different media) significantly shape body morphology.
• The multidimensionality of morphology and ecology complicates macroevolutionary relationship mapping.