deciduous forests reach up 800-1700m above sea level. above this zone is the subalpine zone reaching up to 2500m. siberian dwarf pine inhabits this subalpine zone. on one part of mount nishi under 1700m grows a rare form of spruce, picea koyamae. rock ptarmigan ("lagopus muta") are also native to these mountains, but are under threat due to loss of the siberian dwarf pine habitat and also due to expansion of the range of the red fox. humans have enabled the expansion of the red fox by leaving trash behind in the mountains. also growing in the subalpine zone are abies veitchii and abies mariesii.