Effects of Land Use and Human Population on Plant Productivity of the Indonesian Archipelago

Shunji Ohta, Zenbei Uchijima

研究成果: Article査読


Dramatic changes have occurred in tropical forest areas and the net primary production (NPP) in South and Southeast Asia because of the influence of human activity during the past two hundred years. Recent research reveals that human population density has a significant impact on forest areas. Using this relation and the Chikugo model, we estimated the deforested area, and calculated the biomass degradation of the Indonesian archipelago. The potential total net production (TNP0), defined as the area summation of NPP ignoring the impacts of human population, is evaluated to be about 74.9 x 108tonnes dry matter per year. The actual total net production (TNPa) calculated by considering human land use is estimated to be approximately 65.4 x 108tonnes dry matter per year, and to be 87% of TNP0of natural vegetation over the whole terrestrial area of Indonesia. However, there is a considerable difference between the islands with a high population density and with a low population density. The percentage of forest area of Java Island is less than 10%, and therefore the TNPaof Java to Timor Islands is only 38% of the potential. On the other hand, the forest areas of Irian Jaya and Papua New Guinea are more than 80% of the total land area of this island. TNPain these islands with higher forest cover reaches at 90% of these TNP0.

ジャーナルjournal of agricultural meteorology
出版ステータスPublished - 1997

ASJC Scopus subject areas

  • 農業および作物学
  • 大気科学


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