Lianas are thought to be increasing and altering tree growth and ecosystem productivity in tropical forests, but less research has focused on secondary or seasonally dry tropical forest. We report on an 11-year study of tree growth and liana presence from Guanacaste, Costa Rica, where we measured the diameter growth and liana presence on more than 1,700 trees in regenerating forest of different ages. We find that the proportion of trees without lianas is decreasing and the number of trees with lianas occupying more than 10% of tree’s crowns is increasing. We also find that lianas are affecting the diameter growth of trees. The 11-year average relative growth rates of trees with lianas in more than 10% of the tree’s crown are lower than the relative growth of trees with no lianas or lianas in less than 10% of their crown. Year-to-year, tree relative growth rate is related to annual precipitation and tree diameter. However, trees that were heavily infested with lianas (i.e., with lianas in more than 50% of their crowns) had lower relative growth and a weaker precipitation-growth relationship. This work underscores the value of long-term longitudinal data in secondary forest and adds critical data on dry forest liana abundance change.
Bibliographical noteFunding Information:
We thank Department of Energy Terrestrial Ecosystem Science Program grants DE-SC0014363 and DE-SC0020344 and National Science Foundation Grant DEB-1053237 for funding. We also thank Daniel Pérez-Aviles, Erick Schilling, and Damaris Pereira for help in the field. We thank the staff of Area de Conservacioìn Guanacaste, the staff of Palo Verde, and the Palo Verde OTS research station for facilitating this work.
Copyright © 2022 Becknell, Vargas G, Wright, Woods, Medvigy and Powers.
- liana abundance
- seasonally dry tropical forest
- secondary forest
- tree growth