FRST 320 Lecture Notes - Lecture 6: Lignotuber, Germination, Clonal Colony
Document Summary
From ashes to forests: the lifecycle of forests: history of fire in the earth system . Global fire activity is correlated with oxygen levels and the evolutionary arrival of trees and vegetation. Recall, photosynthesis is the conversion of co2 and h2o to complex carbohydrates driven by solar energy. Combustion of plant materials releases the chemical energy formed by photosynthesis and transforms it to heat energy, co2 and h2o. Plants create the fuels and fire combusts them! Modis rapid response system global fire maps: https://www. youtube. com/watch?v=eet7jwjooqa. First trees seen about 370 million years ago (mya) First forests soon followed in the late devonian. Bole is the main stem of a tree. Pith is the innermost ring of cells of the bole. Cambium is the tissue later of undifferentiated cells that are responsible for the majority of tree growth in the bole. It can divide into xylem (heartwood) for transporting water or phloem (sapwood) for transporting photosynthate and sucrose.
