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

Shunji Ohta, Zenbei Uchijima

    Research output: Contribution to journalArticle

    Abstract

    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.

    Original languageEnglish
    Pages (from-to)833-836
    Number of pages4
    JournalJournal of Agricultural Meteorology
    Volume52
    Issue number5
    DOIs
    Publication statusPublished - 1997

    Keywords

    • actual production
    • biomass degradation
    • human population
    • Indonesian archipelago
    • land use

    ASJC Scopus subject areas

    • Agronomy and Crop Science
    • Atmospheric Science

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