A Review of the Population Dynamics of Selected Tree Species in the Luquillo Experimental Forest, Puerto Rico

摘要: Between 1965 and 1991 studies were conducted of populations Prestoea montana (Graham) Nicholson, Palicourea riparia Benth., Inga vera subsp. Wild, Cecropia peltata L., Buchenavia capitata (Vahl.) Eichl., Manilkara bidentata (A.D.C.) in the tabonuco (Dacroydes excelsa Vahl.) forest Luquillo Experimental Forest (LEF) near El Verde, Puerto Rico. An ecological life-cycle model served as a common format for all species. Actuarial life tables, survivorship curves, tree ring analysis, reciprocal transplants, gas exchange provided particularly useful results. Results include quantitative age-specific estimates distribution abundance six species; descriptions influences various scales disturbance microenvironmental conditions upon population parameters, including distribution, abundance, growth, biomass, reproduction, survival; conclusions regarding successional status each support hypothesis that periodic hurricanes (50- to 60-year intervals) are beneficial, if not necessary, survival both shade-intolerant shade-tolerant species LEF. Seedlings must experience large or an unlikely succession several smaller scale disturbances order receive sufficient solar energy grow sapling size. Once individuals reach size, is high, probability eventually attaining position canopy. High light intensities associated with canopy gaps increased growth r-selected gap opportunists k-selected much 40-fold. Animals essential components cycles Pollination, seed dispersal, dispersion animal dependent. provides one curious example. flowers profusely, but because damage by animals seeking nectar eating fruits seeds, viable production extremely low. Vivipary such handicap under current plant-animal interactions, it seems improbable these relationships have persisted many generations I. P. good examples species, former being obligate latter opportunist. M. shade-adapted, late successional, Contrary prior speculation. mid-successional,