Data from: Comparing forest structure and biodiversity on private and public land: secondary tropical dry forests in Costa Rica
McClellan, Moana, University of California Los Angeles
Montgomery, Rebecca, University of Minnesota
Nelson, Kristen, University of Minnesota
Becknell, Justin, Brown University
Published Dec 20, 2017 on Dryad.
Cite this dataset
McClellan, Moana; Montgomery, Rebecca; Nelson, Kristen; Becknell, Justin (2017). Data from: Comparing forest structure and biodiversity on private and public land: secondary tropical dry forests in Costa Rica [Dataset]. Dryad. https://doi.org/10.5061/dryad.57s62
Secondary forests constitute a substantial proportion of tropical forestlands. These forests occur on both public and private lands and different underlying environmental variables and management regimes may affect post‐abandonment successional processes and resultant forest structure and biodiversity. We examined whether differences in ownership led to differences in forest structure, tree diversity, and tree species composition across a gradient of soil fertility and forest age. We collected soil samples and surveyed all trees in 82 public and 66 private 0.1‐ha forest plots arrayed across forest age and soil gradients in Guanacaste, Costa Rica. We found that soil fertility appeared to drive the spatial structure of public vs. private ownership; public conservation lands appeared to be non‐randomly located on areas of lower soil fertility. On private lands, areas of crops/pasture appeared to be non‐randomly located on higher soil fertility areas while forests occupied areas of lower soil fertility. We found that forest structure and tree species diversity did not differ significantly between public and private ownership. However, public and private forests differed in tree species composition: 11 percent were more prevalent in public forest and 7 percent were more prevalent in private forest. Swietenia macrophylla, Cedrela odorata, and Astronium graveolens were more prevalent in public forests likely because public forests provide stronger protection for these highly prized timber species. Guazuma ulmifolia was the most abundant tree in private forests likely because this species is widely consumed and dispersed by cattle. Furthermore, some compositional differences appear to result from soil fertility differences due to non‐random placement of public and private land holdings with respect to soil fertility. Land ownership creates a distinctive species composition signature that is likely the result of differences in soil fertility and management between the ownership types. Both biophysical and social variables should be considered to advance understanding of tropical secondary forest structure and biodiversity.
Tree species composition data for private tropical dry forest plots
Tree species composition data for 66 0.1-ha private tropical dry forest plots in Guanacaste, Costa Rica
Private Species Abundance Dryad.csv
Private Plots Data for Dryad
Plot level data for 66 0.1-ha plots in tropical dry forests in Guanacaste Costa Rica includes: forest stand age, community weighted mean wood density, aboveground biomass, basal area, stem density for trees >10 cm DBH, stem density for trees <10 cm DBH but 1.3m or higher, Shannon Diversity Index, soil chemical variables, and Principal Component Axes for soil chemical variables.