The studies in the Ogawa Forest Reserve (OPR) were initiated by a group
of plant ecologists and gradually expanded into a comprehensive project
covering various aspects of biology, soil science, and silviculture. The
project was integrated as part of the Forest Ecosystem Team under the
BIO-COSMOS Program funded by the Ministry of Agriculture, Forestry and
Fisheries. As the coordinators of the Forest Ecosystem Team, we are
pleased that reports of the long-term studies carried out in the OFR are
being published in this first volume on Japanese ecosystems in the
Ecological Studies series. Scientists and researchers have made numerous
contributions to the field of forest ecology during more than 10 years
of studies in the OFR. Two reasons can be cited for the success of the
project: scientists from various disciplines concen- trated on a single
target forest ecosystem, and the research continued over a rela- tively
long term. It is now recognized that ecological processes include
compli- cated mechanisms supported by interactions among organisms and
large temporal variations. The researchers in the OFR project were
motivated by their interest in the history of ecosystems and the
interactions of diverse creatures in the forest.