What happens to most of the nitrogen in a leaf every autumn?
It is resorbed by the tree.
It is released as N
It is broken down in soil.
It is consumed by
Which region contains the largest amount of the global carbon pool?
In general, litter with a C/N ratio greater than 30 leads to immobilization, litter with
a C/N ratio less than 20 leads to mineralization, and litter with a C/N ratio of 20-30 leads
to a balance of immobilization and mineralization resulting in no net N production. If
garlic mustard leaf litter collected on the forest floor had 43.2 percent C and 1.16
percent N, this tissue would lead to __________.
An ecologist studying productivity in a sample of grasses measures gross primary
productivity as 1000 kcal/m
/yr and autotrophic respiration as 100 kcal/m
/yr. Based on
these calculations, the net primary productivity would be