A5039017192- Peatlands and Wetlands Ecology
- Oil Palm Production and Sustainability
- Fire effects on ecosystems
- Coastal wetland ecosystem dynamics
- Soil Carbon and Nitrogen Dynamics
- Atmospheric and Environmental Gas Dynamics
- Hydrocarbon exploration and reservoir analysis
- Bioenergy crop production and management
- Agricultural and Environmental Management
- Microbial Community Ecology and Physiology
- Plant Water Relations and Carbon Dynamics
- Methane Hydrates and Related Phenomena
- Plant Pathogens and Fungal Diseases
- Anaerobic Digestion and Biogas Production
- Forest ecology and management
- Soil and Unsaturated Flow
- Geological and Geophysical Studies
- Geology and Paleoclimatology Research
- Marine and coastal ecosystems
- Mycorrhizal Fungi and Plant Interactions
- Forest Biomass Utilization and Management
- Forest Ecology and Conservation
- Geophysics and Gravity Measurements
- Climate change and permafrost
- Pacific and Southeast Asian Studies
Forest Department Sarawak
2005-2024
Universiti Malaysia Sarawak
2022-2024
Nagoya University
2019
Forest Research
2010-2015
Hokkaido University
2005-2007
Abstract While wetlands are the largest natural source of methane (CH 4 ) to atmosphere, they represent a large uncertainty in global CH budget due complex biogeochemical controls on dynamics. Here we present, our knowledge, first multi‐site synthesis how predictors fluxes (FCH4) freshwater vary across wetland types at diel, multiday (synoptic), and seasonal time scales. We used several statistical approaches (correlation analysis, generalized additive modeling, mutual information, random...
Soil CO2 flux was measured monthly over a year from tropical peatland of Sarawak, Malaysia using closed-chamber technique. The soil ranged 100 to 533 mg C m−2 h−1 for the forest ecosystem, 63 245 sago and 46 335 oil palm. Based on principal component analysis (PCA), environmental variables all sites could be classified into three components, namely, climate, moisture bulk density, which accounted 86% seasonal variability. A regression tree approach showed that in each ecosystem related...
Oil palm (Elaeis guineensis Jacq.) production in Indonesia and Malaysia is currently the focus of concern due to its potential impact on environment via greenhouse gas emissions. plantations have been reported release large quantities nitrous oxide (N2O) into atmosphere, which most likely linked nitrogen (N) fertilizer use. However, there are still limited studies comparing effects type soil N N2O carbon dioxide (CO2) This study aimed evaluate types CO2 emissions oil plantations. were...
Abstract Peatlands play a crucial role in the global carbon (C) cycle, making their restoration key strategy for mitigating greenhouse gas (GHG) emissions and retaining C. This study analyses most common pathways employed boreal temperate peatlands, potentially applicable tropical peat swamp forests. Our analysis focuses on GHG C retention potential of measures. To assess stock change restored (rewetted) peatlands afforested with continuous drainage, we adopt conceptual approach that...
Abstract Nitrous oxide (N2O) emissions were measured monthly over 1 year in three ecosystems on tropical peatland of Sarawak, Malaysia, using a closed-chamber technique. The investigated mixed peat swamp forest, sago (Metroxylon sagu) and oil palm (Elaeis guineensis) plantations. highest annual N2O observed the ecosystem with production rate 3.3 kg N ha−1 year−1, followed by at 1.2 year−1 forest 0.7 year−1. ranged from –3.4 to 19.7 µg m−2 h−1 for ecosystem, 1.0 176.3 0.9 58.4 ecosystem....
Tropical peatlands are among the most carbon-dense ecosystems on Earth, and their water storage dynamics strongly control these carbon stocks. The hydrological functioning of tropical differs from that northern peatlands, which has not yet been accounted for in global land surface models (LSMs). Here, we integrated peat-specific hydrology modules into a LSM first time, by utilizing peatland-specific model structure adaptation (PEATCLSM) NASA Catchment Land Surface Model (CLSM). We developed...
Ganoderma boninense causes basal stem rot (BSR) and is responsible for substantial economic losses to Southeast Asia’s palm oil industry. Sarawak, a major producer in Malaysia, also affected by this disease. Emergence of BSR planted on peat throughout Sarawak alarming as the soil type was previously regarded non-conducive. Phylogenetic analysis indicated single species, G. cause Sarawak. Information evolutionary demographic history inferred through informative genes lacking. Hence, haplotype...
Abstract Tropical biogenic sources are a likely cause of the recent increase in global atmospheric methane concentration. To improve our understanding tropical sources, we used eddy covariance technique to measure CH 4 flux (F CH4 ) between peat forest ecosystem and atmosphere Malaysian Borneo over 2‐month period during wet season. Mean daily F measurement period, on order 0.024 g C‐CH ·m −2 ·day −1 , was similar measurements from rice agroecosystems boreal fen ecosystems. A linear modeling...
Information on temporal and spatial variations in soil greenhouse gas (GHG) fluxes from tropical peat forests is essential to predict the influence of climate change estimate effects land use global warming carbon (C) cycle. To obtain such basic information, dioxide (CO2) methane (CH4) fluxes, together with physicochemical properties environmental variables, were measured at three major forest types Maludam National Park, Sarawak, Malaysia, for eight years, their relationships analyzed....
Oil palm plantations in Southeast Asia are the largest supplier of oil products and have been rapidly expanding last three decades even peat-swamp areas. on peat ecosystems a unique water management system that lowers table and, thus, may yield indirect N2O emissions from drainage system. We conducted two seasons spatial monitoring for dissolved concentrations adjacent rivers swamps Sarawak, Malaysia, to evaluate magnitude this ecosystem. In both dry wet seasons, mean median exhibited...
Tropical peat swamp forests are critical components of the global carbon (C) and nitrogen (N) cycles, with microbial decomposers playing a pivotal role in assimilation these elements through activity extracellular enzymes soil. This study examines impact C N decomposition on enzymatic Padang Alan soil Maludam forest, Sarawak. To evaluate driving cycling, samples were collected at four depths (0–10 cm, 10–50 50–100 100–150 cm) subjected for assays....