In this lab your will observe the decomposition of hardwood and softwood
trees by finding and observing trees in as many stages of decay as you can
find, from standing dead trees to logs that have mixed with the soil.
Observe the condition of the log at each stage:
Is the bark intact?
Is the log in contact with the ground?
Is there a change in shape, color, or texture?
Is the wood moist?
What organisms are present and what role are they performing
in the decomposition of the log?
Discuss what happens to a tree as it decays and the roles
various organism play in decomposition.
Next you will observe the decomposition of hardwood and softwood leaf
litter.
Starting from the top, work your way down through the
litter until you reach mineral soil.
Note the color, texture and shape of the leaves.
Note moisture content.
Note the presence or absence of fungi and other organisms.
Note the presence or absence of roots.
Measure the depth of each layer you can detect.
Discuss what happens to leaves from the time they fall
from the tree until they are mixed with the soil.
