A measurable characteristic relevant to plant performance or ecological effects. A convenient trait measurement is not automatically a direct assay of lifetime genotype fitness.
A ratio expressing carbon gain or biomass production relative to water use, under a specified measurement convention. Higher leaf-level efficiency does not guarantee greater whole-ecosystem carbon storage.
Mass of wood per specified reference volume, with measurement conventions stated. It can associate with mechanical investment, transport and demographic performance without uniquely determining any one mechanism.
Leaf dry mass divided by leaf area. Its construction-mass meaning must be kept distinct from whole-plant growth rate.
Leaf area per unit dry mass. It is the reciprocal of leaf mass per area when the same tissue and units are used.
Coordinated variation in leaf construction, physiological rates and longevity, contrasting rapid returns with persistent, conservative tissues. Mass-based and area-based measurements differ.[ref]
The worldwide leaf economics spectrum by Ian J. Wright and others. Global comparative trait relationships
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