DOI: 10.3390/f11020213
论文题名: Modeling the effects of global change on ecosystem processes in a tropical rainforest
作者: Russell A.E. ; Parton W.J. ; Jr.
刊名: Forests
ISSN: 19994907
出版年: 2020
卷: 11, 期: 2 语种: 英语
英文关键词: Biogeochemical model
; Climate change
; Precipitation
; Species effects
; Temperature
; Tropical forests
Scopus关键词: Biogeochemistry
; Budget control
; Climate models
; Digital storage
; Ecosystems
; Forestry
; Land use
; Precipitation (chemical)
; Soils
; Temperature
; Tropics
; Biogeochemical cycle
; Biogeochemical modeling
; Climate change simulations
; Environmental conditions
; Evergreen tree species
; Species effects
; Tree species composition
; Tropical forest
; Climate change
英文摘要: 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. © 2020 by the authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/159398
Appears in Collections: 气候变化与战略
There are no files associated with this item.
作者单位: Department of Natural Resource Ecology and Management, Iowa State University, Ames, IA 50011, United States; Natural Resource Ecology Laboratory, Colorado State University, Fort Collins, CO 80523, United States
Recommended Citation:
Russell A.E.,Parton W.J.,Jr.. Modeling the effects of global change on ecosystem processes in a tropical rainforest[J]. Forests,2020-01-01,11(2)