LIST OF TABLES Table pge 1-1 Ecological characteristics of eight tropical tree species used in my study, listed by increasing shade tolerance. .............................................. ............... 26 1-2 Percent seedling survival for the eight study species over specified periods from four independent studies in BCNM ....................................................................... 27 1-3 Effect of species and harvest time on material and structural properties of seedling stem s. ..................................................... ................. 2 8 1-4 Relationships among stem biomechanical traits for seedlings of eight tree sp e cie s. ........................................................... ................ 2 9 1-5 Effect of species and harvest time on material and structural traits of leaves.. .......31 1-6 Relationships among leaf biomechanical traits for seedlings of eight tree species..32 1-7 Relationships among biomechanical traits of stems and leaves for seedlings of eight tree species. .......................... ...................... ... .. ...... .... ........... 33 1-8 Relationships among % survival in shade and various seedling biomechanical traits of stems and leaves for seedlings of eight tree species. ................................34 2-1 Relationships among species rankings of survival probability during the specified interval for seedlings of eight tree species............................................. 59 2-2 Percent damage fatality of four types of mechanical damage on eight tree species during 1 yr in the forest understory. ................................. .................59 2-3 Relationships among stem biomechanical traits and % damage fatality for seedlings of eight tree species. ............................................................................ 60 2-4 Percentage of artificial seedlings affected by specified damage agents in this and other published studies in different forest communities.......................61 A-i Biomechanical measurements of seedling stems from eight tree species ..............68 A-2 Biomechanical measurements of seedling leaves from eight tree species ..............70 A-3 Fiber fractions of seedling stems from eight tree species. .....................................72