Structural, Floristic, and Phylogenetic Dynamics of Tropical Forest Stands During Succession
ProQuest, 2008 - 159 pages
Secondary forests recover rapidly in this region, with lianas and free-standing woody plants responding differently during succession. Total aboveground biomass reaches old-growth levels in as little as 15-20 yrs, species richness recovers in 30-44 yrs, and species composition in secondary forests converges with old-growth forest over time. Tree biomass shows a hump-shaped relationship with forest age, with the highest values in forests 30-44 yrs of age, while liana biomass shows a monotonic increase during succession. Depending on the method of assessment, liana species richness shows no change or a slight decline with forest age. The increase in species richness during succession is driven by tree species. Liana species composition does show concerted changes during succession, though, and the changes in the liana species composition are strongly related to changes in the tree community. I discuss the advantages and constraints of the liana growth form, and how growth form leads to the differences between tree and liana responses to successional change.
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APPENDIX 1A Life History Traits of Liana Species in the Chronosequence
APPENDIX IB Sources for Natural History Information on Lianas
aboveground biomass ANOSIM Appendix 1A Arecaceae Asterid Bignoniaceae biodiversity biomass biomass accumulation Biotropica bird/mammal bird/mammal bird/mammal Chave Chazdon chronosequence climbing mode cm DBH Colwell Costa Rica data set DeWalt diaspore Dichapetalaceae Dilleniaceae diversity Ecology and Management equations estimated F F F Fabaceae Figure Finegan forest age category Forest Ecology forests 15 yrs Gentry Gerwing giant herbs growth forest H H H land-use history liana species liana stems lianas medium medium medium Melastomataceae Minitab Neotropical northeastern Costa Rica old forest old-growth forest overdispersion Pascarella Passifloraceae phylogenetic phylogenetic overdispersion phylogenetic structure plot Polygalaceae Putz rain forest remnant trees Rosid Sapindaceae Schnitzer secondary forests seedling growth self-supporting plants significant small small species composition species pool species richness successional age category supertree Table taxa tendrils tendrils tendrils transect tropical forest tropical forest succession twiner twiner twiner understory vegetation Webb wind wind wind woody yrs forest yrs pasture yrs Spp