Ecological succession in new and old swiddens of montane Papua New Guinea

摘要: Fieldwork conducted in new and old swiddens the Maring territory of Bismarck Mountains Papua New Guinea indicated a successional sequence crop composition, diversity, biomass regulated by human ecological processes. With increasing swidden age, number cultivated species, individuals, varieties, net productivity decreased. In contrast to swiddens, were characterized simplified composition distinct vertical stratification. While 3-month-old garden contained 10 cultivar 43.5 plantings taro, content 2.54 kg/25 m2, 1.13 gm/m2/day, 2-year-old six no taro plantings, 13.80 0.77 gm/m2/day. Differences life histories cultivars help determine succession. This study quantitatively defines these changing characteristics swiddens. It concludes that Kauwatyi system subsistence, which emphasizes diversity conservation practices, such as planting protection certain forest regrowth ensures regeneration forest.