Tagged: self-shading


Small and large twigs

Revising Corner’s rule: how to best partition twig leaf area

Corner’s rule states that in woody plants, twigs (current-year shoots) with thicker stems support larger leaves. Larger leaf areas require thicker twigs for hydraulic and mechanical support, but a question remains as to why the pattern of thicker twigs resulting in larger leaves emerges, and also as to whether total leaf area should be partitioned into many small leaves or a few large leaves. Corner’s rule implies that larger twig leaf areas should be partitioned into larger sized leaves. Smith et al. verified Corner’s rule in six co-occurring and functionally similar species, finding that individual increases in leaf size correlate...

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Determinants of crown depth at three organizational levels.

Functional significance of crown shape diversity and plasticity across tropical tree species

It has been maintained that selection for sapling performance in the strongly limiting light conditions of tropical forest understorey is likely to maximise whole-plant light capture efficiency. In their investigation of a suite of morphological traits at various hierarchical scales, Laurans et al. found no evidence to support this hypothesis among and within 14 tree species within the region of French Guiana.The shallow crown of shade-intolerant species in shade is shown to result from a slow crown vertical growth and not from a shortened leaf lifespan, which would be a sign of self-shading or of an adaptive strategy of nutrient...

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