Influence of Climate Change, Fire, Insect and Harvest on Carbon Dynamics for Jack Pine in Central Canada: Simulation Approach with the EFIMOD Model

By Jagtar Bhatti, Oleg Chertov and Alexander Komarov.

Published by The International Journal of Climate Change: Impacts and Responses

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Article: Print $US10.00
Article: Electronic $US5.00

Changes in disturbance regimes, both natural and anthropogenic, will be an important mechanism by which northern ecosystems respond to climate change, and are an important feedback mechanism in changing ecosystem processes. A forest ecosystem model, EFIMOD, was applied to the jack pine (Pinus banksiana Lamb.) stands in Central Canada to simulate the influence of climate warming, fire, insects and harvesting on jack pine productivity and pools of soil carbon (C). For the climate change simulations, temperature and precipitation prediction data from three General Circulation Models (GCMs) were used: the Canadian Climate Centre for Modelling and Analysis, CGCM2; the UK Hadley Centre, HadCM3; and the Australian CSIRO Mark 2 GCM. In all three of these scenarios, whole trees biomass increased, whereas the soil organic C pool consistently decreased. The CSIRO and CGCM scenarios had the strongest affect on biomass, soil, and ecosystem processes (net primary productivity, soil respiration, and net ecosystem productivity). Assessing the net ecosystem productivity over 150 years for jack pine stands shows a C sink under different disturbance regimes: ‘no disturbances >harvest-fire > two fires > insect attack > harvesting > fire-harvest’ ; and net carbon source under a four fires scenario. The disturbance frequency was found to have a strong and lasting influence on the dynamics of the C stocks, and a direct effect on C source/sink relationship. Soil nitrogen content, which reflect the productivity potential, modify the effect of climate change and disturbances.

Keywords: Canadian Boreal Forest, Pinus Banksiana Lamb, Carbon Balance, Climate Change, Disturbance Regime, Simulation Model EFIMOD

The International Journal of Climate Change: Impacts and Responses, Volume 1, Issue 3, pp.43-62. Article: Print (Spiral Bound). Article: Electronic (PDF File; 2.115MB).

Dr. Jagtar Bhatti

Research Scientist, Northern Forestry Centre, Canadian Forest Service, Northern Forestry Centre, Edmonton, Alberta, Canada

Jagtar Bhatti, is a research scientist and project leader with Natural Resources Canada, Canadian Forest Service, Northern Forestry Centre, in Edmonton, Alberta, Canada. He received his Ph. D. in Soil and Water Science from University of Florida in 1994, and start working for Canadian Forest Service. His research focuses is on carbon dynamics in upland and low land boreal forest ecosystems in particular the influence of biophysical processes in relation to changes in disturbances, moisture, nutrient, and climate regimes.

Dr. Oleg Chertov

University of Applied Sciences Bingen Berlinstr, Bingen, Germany

He was born 28.02.1937. MSc. in Forestry at the Leningrad Forest Academy, Leningrad (now St. Petersburg) in 1959. Candidate of Agr. Sci. in Soil Sci. at the Leningrad Forest Academy in 1966, Dr. of Biol. Sci. in Ecology at the Tartu State University, Estonia in 1979. His main focus was in Forest Soil (humus types studies), Forest Science (forest sites classification), Environmental science (effect of air pollution on forest ecosystems) and over last twenty years, he is working in the simulation modelling of forest soils and ecosystems in relation to silvicultural regimes and climate changes. For a long time, he worked at the St. Petersburg State University, Russia. Now he is Professor at the University of Applied Sciences Bingen in Germany.

Alexander Komarov

Russian Academy of Sciences, Russian Federation

He was born 20.03.1945. MSc. in Mathematics at the Lomonosov State University, Moscow in 1967. Candidate of Biol. Sci. in 1987 at the Lomonosov State University, Dr. of Biol. Sci. in 2003at the Institute of Ecology of Wolga Region. He is working in the mathematical modelling of biological systems since the late 70th. His interests are cellular automata, spatially explicit individual-based modelling, modelling of grass and forest ecosystems. Since 1980’s, he is working in modelling forest ecosystems under effects of silvicultural regimes and climate changes. He is a head of Lab. of Ecological Modelling at the Institute of Physical; Chemical and Biological Problems of Soil Science, Russian Academy of Sciences (Town of Pushchino, Moscow Area, Russia).

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