A5018921003- Forest ecology and management
- Conservation, Biodiversity, and Resource Management
- Forest Ecology and Conservation
- Plant Water Relations and Carbon Dynamics
- Forest Management and Policy
- Ecology and Vegetation Dynamics Studies
- Forest Biomass Utilization and Management
- Fire effects on ecosystems
- Plant responses to elevated CO2
- Leaf Properties and Growth Measurement
- Remote Sensing and LiDAR Applications
- Agroforestry and silvopastoral systems
- Tree-ring climate responses
- Remote Sensing in Agriculture
- Biofuel production and bioconversion
- Oil Palm Production and Sustainability
- Soil Management and Crop Yield
- Forest Ecology and Biodiversity Studies
- Agriculture and Rural Development Research
- Photosynthetic Processes and Mechanisms
- Land Use and Ecosystem Services
- Plant and Fungal Interactions Research
- Biodiesel Production and Applications
- Livestock Farming and Management
- Agricultural and Environmental Management
University of California System
2025
Forestry and Forest Products Research Institute
1995-2022
Center for International Forestry Research
2004-2007
Swedish University of Agricultural Sciences
2006
Research Institute of Tropical Forestry
2006
Mulawarman University
1999-2005
Forest Research
2005
Waseda University
2004
Riau University
2004
Commonwealth Scientific and Industrial Research Organisation
2001
The scaling of respiratory metabolism with body mass is one the most pervasive phenomena in biology. Using a single allometric equation to characterize empirical relationships and evaluate alternative hypotheses about mechanisms has been controversial. We developed method directly measure respiration 271 whole plants, spanning nine orders magnitude mass, from small seedlings large trees, tropical boreal ecosystems. Our measurements include roots, which have often ignored. Rather than...
Abstract. The seasonal climate drivers of the carbon cycle in tropical forests remain poorly known, although these account for more assimilation and storage than any other terrestrial ecosystem. Based on a unique combination pan-tropical data sets from 89 experimental sites (68 include aboveground wood productivity measurements 35 litter measurements), their associated canopy photosynthetic capacity (enhanced vegetation index, EVI) climate, we ask how allocation are related to seasonality...
Diurnal changes in gas exchange and chlorophyll fluorescence were measured the top canopy leaves of tropical rainforest tree species, Macaranga conifera (Zoll.) Muell. Arg. during a drought year. Maximum values net photosynthetic rate (P(n), 10 &mgr;mol m(-2) s(-1)) stomatal conductance (g(s), 0.2 mol found east-facing early morning. After 1000 h, both P(n) g(s) decreased. Minimum daytime P(n), g(s), photosystem II (PSII) quantum yield (DeltaF/F(m)') horizontally fixed leaves. At given...
Abstract. The seasonal climate drivers of the carbon cycle in tropical forests remain poorly known, although these account for more assimilation and storage than any other terrestrial ecosystem. Based on a unique combination pan-tropical data sets from 89 experimental sites (68 include aboveground wood productivity measurements 35 litter measurements), their associate canopy photosynthetic capacity (enhanced vegetation index, EVI) climate, we ask how allocation are related to seasonality...
This study explores the compaction behavior of thin-film composite reverse osmosis (TFC RO) membranes for different combinations transmembrane pressure (TMP) and water flux. Operating a crossflow system at constant feed (60 bar) but solution osmotic pressures enabled adjusting TMP─the difference between hydraulic pressure─and The extent membrane increases as TMP (and flux) increases. Both commercial hand-cast TFC RO showed substantial high (up to 30% 50 bar TMP) compared less than 10% 10...
We tested the hypothesis that, in tropical pioneer tree species, vertical leaf angle contributes to high carbon gain because it minimizes damage caused by irradiances. Diurnal changes gas exchange and chlorophyll fluorescence were measured east-facing (EL), west-facing (WL) leaves, leaves artificially held horizontal (HL) uppermost canopy of Macaranga conifera (Zoll.) Muell. Arg. Maximum values net photosynthetic rate (P(n)) for EL HL reached 12 &mgr;mol m(-2) s(-1), whereas maximum P(n) WL...
Dryobalanops aromatica Gaertn. f. is a major tropical canopy species in lowland rain forests Peninsular Malaysia. Diurnal changes net photosynthetic rate (A) and stomatal conductance to water vapor (gs) were measured fully expanded young old leaves the uppermost (35 m above ground). Maximum A was 12 10 μmol m−2 s−1 leaves, respectively; however, because of large variation among mean maximum only 6.6 5.5 s−1, respectively. Both gs declined when Tleaf exceeded 34 °C leaf-to-air pressure...
After the 1998 forest fire in East Kalimantan, Indonesia, biomass recovery of naturally regenerated vegetation was estimated order to evaluate initial secondary succession patterns burned land. We established research plots that included pioneer tree species, and dominant species were Homalanthus populneus, Macaranga gigantea M. hypoleuca, Mallotus paniculatus, Melastoma malabathricum, Piper aduncum, or Trema cannabina T. orietalis. Annual censuses over 4 years (from 2000 2003) showed on...
AbstractBiomass of a mature man-made forest in West Java, Indonesia, was estimated to evaluate the carbon sequestration potential plantation humid tropics. Twenty plots, each 0.25ha area and containing one six planted species over 40 years age with closed canopies, were selected. Trunk dry mass from trunk diameter, tree height, bulk density. Maximum diameter (122cm) observed 46-year-old Khaya grandifoliola C. DC. tree, tallest (51m) Shorea selanica (DC.) Blume. The largest biomass...
The height and numbers of pneumatophores a mangrove, Avicennia marina, were investigated under different levels plant densities flooding water level on an experimental stand. Initial assigned to four levels, 30, 45, 89, 260 plants per square meter. After two years nine months, changed keep ground (control), 9cm above (flooded). average lower greater than those higher densities. Pneumatophores became longer in number when the kept flood. total rate increment density pots flood well exceeded...