FOR201H1 Study Guide - Midterm Guide: Lignin, Macaranga, Herbivore
Document Summary
Fewer seed express dormancy recalcitrant vs. orthodox for pioneers. Lower maximal photosynthesis and light compensation point. Longer leaf life span: pioneer leaves: thicker, low lignification , white underside common, variety of shapes. Late succession leaves: thinner, high lignifications, very rare white underside, very consistent shapes. More herbivore defenses, especially generalized defense (tannin, like that in black- water) In general, late-succession trees do not grow as fast or survive as well as pioneers at first, but they outgrow the pioneer due to longer longevity and better fitting to a shaded environment. Typhoon/hurricane: caribbean, central america, taiwan and parts of phillipines. Fire: most deciduous and semi-deciduous tropical forests. Volcanic activities/earthquakes: along andes, most of indonesia, parts of central africa. Lecture 7: topical pioneers are all similar, despite site of origin. Cecropia vs. musanga vs. macaranga: all with umbrella-like lobed leaves, dd, diversity is maintained by ecological differences btw species. Niche partitioning ensures this kind of difference will exist.
