Forests formed by Ch. arbutifolia and
several species of the genera Salix and Populus are typical of low and
medium river-valley terraces. Initially Ch. arbutifolia, often together
with Salix rorida, S. triandra, S. cardiophulla and other Salix representatives,
colonized low, periodically flooded sand-pebble terraces of river valleys.
Ch. arbutifolia is singularly adapted to washing humdification regimen
to often form pure tree stocks with no concomitant species. As the terrace
level rises and frequency and height of flooding drops, the role of Salix
spp. increases to give rise to poplars (Populus coreana, P. maximoviczii,
P. suaveolens) to form willow-poplar trees that occupy preferentially the
medium levels of river flood plains, which are flooded only with considerable
Tree stock productivity is valued at grade I, sometimes Ia, and seldom, with old age of the dominant canopy, at grade II.
All these forests have very high and diversified ecoprotective significance, and have been assigned the status of forests of special protective significance.