Reactivity of litter DOM inputs and lateral subsurface
flow DOM exports
Patterns of biological reactivity in DOM inputs in litter leachate
between hillslopes matched those of DOM exports in subsurface flow. DOM
inputs and exports on the second-growth hillslope had dissolved oxygen
consumption rates more than twice those from old-growth, reflective of
higher DOM reactivity (Fig 4). Similarly, the average respiratory
quotient of DOM inputs from second-growth was 5 times higher than inputs
to old-growth DOM (1.24, compared to 0.18 for old-growth, Table 2).