Download A Model-Based Analysis of the Effect of Long

A Model-Based Analysis of the Effect
of Long-term Atmospheric Nitrogen
Deposition on Nitrogen and Carbon
Dynamics in Northern Peatlands
Yuanqiao Wu
Limnology station and hydrology department
University of Bayreuth
Research Questions
N saturation
Loss of biodiversity
Increase in Soil
temperature
N degradation
Carbon
Accumulation
Decrease in soil
moisture
Translocation
and efflux of N
The model should be able to…



Simulate how and to what extent N concentration affects C
& N cycling in a peatland ecosystem
Utilize biodiversity change as a parameter (through Moss’s
N filter function)
Capture the main processes:
- Plant biology (Photosynthesis, Respiration.)
- Hydrothermal future (Effective soil moisture, soil T, Redox potential)
- Physical processe (Gas Transport, C&N reallocation)
- Microbial mediated Carbon and Nitrogen paths
- Soil chemical processes

Run for a long time scale and simulate on regional level
Already such a model?




Long-term peat dynamics models:
i.e. Classical Peat growth model (Clymo’s, 1978)
Process based models
i.e. McGill Wetland Model: Peatland Carbon Simulator
C Cycling models with vegetation competetion
consideration
i.e. NUCOM-BOG
C & N Cycling models
i.e. PnET
AND MANY OTHERS…..