Morphology (biology)

Morphology concerns biological form and structure; a structural difference is one aspect of phenotype, not automatically a species boundary.

Scaling of a measured trait with body size or another dimension. Size correction can change apparent ecological differences.

A space defined by measured or theoretical shape variables. Distance in this space is not automatically ecological niche distance.

Study of relationships between anatomical construction and mechanical or physiological function.

Study of relationships between organismal form and ecological performance or resource use.

The size of an organism, operationalized through a measure such as mass or a specified linear dimension. Comparative measurements require consistent definitions and allowance for growth.