To evaluate the deforestation
and forestation effects on the carbon and water cycles, micrometeorological and
hydrological observations were conducted in a conifer-broadleaf mixed forest in
northernmost Japan
in the series of these activities. The
clear-cutting of trees changed the carbon balance of the ecosystem to the net
source in the plant-growing period, although the undergrowth, Sasa bamboos, still keeps large biomass
after the tree-cutting and the half-hourly flux indicate carbon sequestration
in the daytime. Strip-cutting of Sasa bamboos and planting of the larch
saplings did not cause the distinct change in the emission rate. On the other
hand, the evapotranspiration rate recovered to the same level with that in the
mixed forest within 2 years after the clear-cutting. We attributed the increase
in the evapotranspiration rate partly to the acclimation in the transpiration
capacity of Sasa bamboos.
Author: K. Takagi, M. Nomura, K. Fukuzawa, H. Shibata, et al (kentt at exfor dot agr dot hokudai dot ac dot jp)
Filesize: 122.11 Kb