A Maturing Forest Cycles Living Trees To Dead Trees That Eventually Decay And Fall From Seasonal Events The Oldest Tree 1 (41.97 KiB) Viewed 42 times
A Maturing Forest Cycles Living Trees To Dead Trees That Eventually Decay And Fall From Seasonal Events The Oldest Tree 2 (8.91 KiB) Viewed 42 times
A Maturing Forest Cycles Living Trees To Dead Trees That Eventually Decay And Fall From Seasonal Events The Oldest Tree 3 (5.56 KiB) Viewed 42 times
A maturing forest cycles living trees to dead trees that eventually decay and fall from seasonal events. The oldest trees (likely to die in the next few years) provide a biomass source and fallen trees become humus. Total biomass is a key parameter to assess atmospheric carbon harvested by trees. Forest biomass estimates since 1980 have been made by satellite remote sensing with up to 90% accuracy (Science 87(5), 2004), 1123 Rate constants decade! 8 Planting rate tonnes/decade Time to mature decade 4 20 2() Live Tyre VO Dead Tree Hans A simple compartment model tracks biomass decayed into humus X(t), biomass of dead trees y(t), and biomass of living trees z(t), all in tonnes, with time t in decades. For example: dx dt 11-71*+ray, dy = - +7,2 dt dz dt = -132 + 8 Initial assumptions: x(0) = y(0) = 0, 2(0) = D. 8 denotes tonnes/decade of mature live trees developing from planting. T is the time to mature from seedling.
40 131 Planting provides a constant 8 (mature) supply of mature live trees per decade. Explore the impact of maturity time r on live-tree population, and hence deduce the impact upon steady-state biomass sustainability
A=10 B=17 C=2 B=2
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