Comparing forest structure and biodiversity on private and public land: secondary tropical dry forests in Costa Rica

Moana McClellan, Rebecca Montgomery, Kristen Nelson, Justin Becknell

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

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.

Original languageEnglish (US)
Pages (from-to)510-519
Number of pages10
JournalBiotropica
Volume50
Issue number3
DOIs
StatePublished - May 2018

Keywords

  • Costa Rica
  • Guanacaste
  • ecosystem services
  • forest biomass
  • forest conservation
  • forest management
  • forest succession
  • land tenure
  • secondary forests
  • species composition

Fingerprint Dive into the research topics of 'Comparing forest structure and biodiversity on private and public land: secondary tropical dry forests in Costa Rica'. Together they form a unique fingerprint.

Cite this