Modeling the Effects of Global Change on Ecosystem Processes in a Tropical Rainforest
Open Access
- 13 February 2020
- Vol. 11 (2), 213
- https://doi.org/10.3390/f11020213
Abstract
Research Highlights: Ongoing land-use change and climate change in wet tropical forests can potentially drive shifts in tree species composition, representing a change in individual species within a functional group, tropical evergreen trees. The impacts on the global carbon cycle are potentially large, but unclear. We explored the differential effects of species within this functional group, in comparison with the effects of climate change, using the Century model as a research tool. Simulating effects of individual tree species on biome-level biogeochemical cycles constituted a novel application for Century. Background and Objectives: A unique, long-term, replicated field experiment containing five evergreen tree species in monodominant stands under similar environmental conditions in a Costa Rican wet forest provided data for model evaluation. Our objectives were to gain insights about this forest’s biogeochemical cycles and effects of tree species within this functional group, in comparison with climate change. Materials and Methods: We calibrated Century, using long-term meteorological, soil, and plant data from the field-based experiment. In modeling experiments, we evaluated effects on forest biogeochemistry of eight plant traits that were both observed and modeled. Climate-change simulation experiments represented two climate-change aspects observed in this region. Results: Model calibration revealed that unmodeled soil processes would be required to sustain observed P budgets. In species-traits experiments, three separate plant traits (leaf death rate, leaf C:N, and allocation to fine roots) resulted in modeled biomass C stock changes of >50%, compared with a maximum 21% change in the climate-change experiments. Conclusions: Modeled ecosystem properties and processes in Century were sensitive to changes in plant traits and nutrient limitations to productivity. Realistic model output was attainable for some species, but unusual plant traits thwarted predictions for one species. Including more plant traits and soil processes could increase realism, but less-complex models provide an accessible means for exploring plant-soil-atmosphere interactions.Keywords
Funding Information
- National Science Foundation (0703561; 0703420; 1119223)
This publication has 73 references indexed in Scilit:
- Process‐based models are required to manage ecological systems in a changing worldEcosphere, 2013
- Rapidly growing tropical trees mobilize remarkable amounts of nitrogen, in ways that differ surprisingly among speciesProceedings of the National Academy of Sciences of the United States of America, 2012
- Impacts of climate warming on terrestrial ectotherms across latitudeProceedings of the National Academy of Sciences of the United States of America, 2008
- Halloysite versus gibbsite: Silicon cycling as a pedogenetic process in two lowland neotropical rain forest soils of La Selva, Costa RicaGeoderma, 2007
- Lignin and enhanced litter turnover in tree plantations of lowland Costa RicaForest Ecology and Management, 2007
- Energy dynamics and modeled evapotranspiration from a wet tropical forest in Costa RicaJournal of Hydrology, 2005
- Ecological impact of historical and future land-use patterns in SenegalJournal of Arid Environments, 2004
- Stocks and flows of coarse woody debris across a tropical rain forest nutrient and topography gradientForest Ecology and Management, 2002
- Landscape-scale variation in forest structure and biomass in a tropical rain forestForest Ecology and Management, 2000
- Effects of Plant Growth Characteristics on Biogeochemistry and Community Composition in a Changing ClimateEcosystems, 1999