CERES: a model of forest stand biomass dynamics for predicting trace contaminant, nutrient, and water effects
CERES is a forest stand growth model which incorporates sugar transport in order to predict both short-term effects and long-term accumulation of trace contaminants and/or nutrients when coupled with the soil chemistry model (SCHEM), and models of solute uptake (DIFMAS and DRYADS) of the Unified Transport Model, UTM. An important feature of CERES is its ability to interface with the soil-plant-atmosphere water model (PROSPER) as a means of both predicting and studying the effects of plant water status on growth and solute transport. CERES considers the biomass dynamics of plants, standing dead and litter with plants divided into leaves, stems, roots, and fruits. The plant parts are divided further into sugar substrate, storage, and in the case of stems and roots, heartwood components. Several applications of the model are described. Simulation results for ten days in May illustrate the hourly patterns of photosynthesis, leaf sugar levels and translocation. The second application of CERES is a one-year simulation, showing seasonal dynamics of biomass fluxes in plants and litter. Results from a six-year simulation with the complete set of coupled models illustrate toxic metal effects on litter decomposition and slight reduction of root growth with the parameters chosen. Heavy metal pollutants from a lead mine and smelter complex were introduced to the ecosystem as wetfall and dryfall. The DRYADS and DIFMAS models calculated the heavy metal uptake by the vegetation and accumulation in litter. During the six-year period, the steady annual input of plant litter and the reduced decomposition rate resulted in an increase in litter mass of nearly 50 percent. Input data were chosen to represent the oak forest characteristics of the Crooked Creek watershed in southeastern Missouri.
- Research Organization:
- Oak Ridge National Lab., Tenn. (USA)
- DOE Contract Number:
- W-7405-ENG-26; NSF-AEN-72-01243A03
- OSTI ID:
- 7245702
- Report Number(s):
- ORNL/NSF/EATC-25
- Country of Publication:
- United States
- Language:
- English
Similar Records
Application of the unified transport model to the movement of Pb, Cd, Zn, Cu, and S through the Crooked Creek Watershed. [Missouri adjacent to Pb mine and smelter]
Transport model to predict the movement of Pb, Cd, Zn, Cu, and S through a forested watershed. [Heavy metal concentrations in soils and surface waters adjacent to Pb mine and smelter]
Related Subjects
FORESTS
BIOLOGICAL MODELS
GROWTH
BIOLOGICAL EFFECTS
BIOMASS
DATA COMPILATION
FORECASTING
FOREST LITTER
METALS
NUTRIENTS
PHOTOSYNTHESIS
PLANTS
POLLUTION
SACCHAROSE
TOXICITY
TRANSLOCATION
WATER
WATERSHEDS
BIOLOGICAL MATERIALS
CARBOHYDRATES
CHEMICAL REACTIONS
DISACCHARIDES
ELEMENTS
ENERGY SOURCES
HYDROGEN COMPOUNDS
OLIGOSACCHARIDES
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
RENEWABLE ENERGY SOURCES
SACCHARIDES
SYNTHESIS
510200* - Environment
Terrestrial- Chemicals Monitoring & Transport- (-1989)