1: Introduction.- 1 Description of Forests and Forestry in East Kalimantan.- 2 Climate in Bukit Soeharto, East Kalimantan.- 3 Effects of Droughts and Forest Fires on Dipterocarp Forest in East Kalimantan.- 2: Soil Characteristics and Human Impacts.- 4 Are Soils in Degraded Dipterocarp Forest Ecosystems Deteriorated? A Comparison of Imperata Grasslands, Degraded Secondary Forests, and Primary Forests.- 5 Vertical Transportation of Chemical Elements Through Water Movement in Different Vegetation.- 6 Changes in Soil Nutrient Status After Abandonment of Swidden Agriculture at Benuaq Dayak Village.- 7 Serpentine Soils on Catena in the Southern Part of East Kalimantan, Indonesia.- 8 Characteristics of Soils Developed on Volcanic Parent Materials in the Barong Tongkok Area.- 3: Drought and Fire Impacts on Forest Ecosystems.- 9 Tree Species Composition of a Burned Lowland Dipterocarp Forest in Bukit Soeharto, East Kalimantan.- 10 Dynamics of Burned Lowland Dipterocarp Forest Stands in Bukit Soeharto, East Kalimantan.- 11 Flowering and Fruiting Phenologies of Dipterocarps in a Rainforest in Bukit Soeharto, East Kalimantan.- 12 Leaf Gas Exchange and Canopy Structure in Wet and Drought Years in Macaranga conifera, a Tropical Pioneer Tree.- 13 Responses of Dipterocarp Seedlings to Drought Stress.- 14 The Effect of Droughts and Fires on Coleopteran Insects in Lowland Dipterocarp Forests in Bukit Soeharto, East Kalimantan.- 4: Human Impacts on Forest Ecosystems.- 15 Mecha-nism of Changes in the Kenyah’ s Swidden System: Explanation in Terms of Agricultural Intensification Theory.- 16 Tropical Secondary Forest and Its Succession Following Traditional Slash-and-Burn Agriculture in Mencimai, East Kalimantan.- 17 The Role of Slash-and-Burn Agriculture in Transforming Dipterocarp Forestinto Imperata Grassland.- 18 Impact of Different Intensities of Selective Logging on a Low-Hill Dipterocarp Forest in Pasir, East Kalimantan.- 19 A Case Study of Second Felling in a Logged-Over Dipterocarp Forest.- 20 Effects of Forest Fragmentation on the Behavior of Bornean Gibbons.- 5: Rehabilitation Techniques and Constraints on Sustainable Forest Management.- 21 Treatment to Develop Mycorrhiza Formation on Dipterocarp Seedlings.- 22 A Convenient Method for Inoculating Dipterocarp Seedlings with the Ectomycorrhizal Fungus, Scleroderma columnare.- 23 Photographic Estimation of Light Environments on Forest Floors and Effects of Light on the Growth of Dipterocarp Seedlings.- 24 In Situ Study of the Effects of Elevated Temperature on Photoinhibition in Climax and Pioneer Species.- 25 Growth of Ulin (Eusideroxylon zwageri) Seedlings in Relation to Environmental Factors in the Forest Understory.- 26 Diseases of Dipterocarp Saplings Planted in Buldt Soeharto Education Forest, East Kalimantan.- 27 Participatory Forest Management.- 28 Overview of the Changing Forest Ecosystems in East Kalimantan.- Species Index.