A5041059022- Soil Carbon and Nitrogen Dynamics
- Peatlands and Wetlands Ecology
- Soil and Water Nutrient Dynamics
- Atmospheric and Environmental Gas Dynamics
- Soil and Unsaturated Flow
- Forest Ecology and Biodiversity Studies
- Fire effects on ecosystems
- Forest ecology and management
- Remote Sensing and LiDAR Applications
- Soil Geostatistics and Mapping
- Plant Ecology and Soil Science
- Agriculture, Soil, Plant Science
- Plant Water Relations and Carbon Dynamics
- Isotope Analysis in Ecology
- Cryospheric studies and observations
- Climate change and permafrost
- Wood and Agarwood Research
- Horticultural and Viticultural Research
- Forest Management and Policy
- Ecology and Vegetation Dynamics Studies
- Geology and Paleoclimatology Research
- Landfill Environmental Impact Studies
- Mycorrhizal Fungi and Plant Interactions
- Bioenergy crop production and management
- Land Use and Ecosystem Services
Forestry and Forest Products Research Institute
2015-2024
Kitasato University
2020
Forest Research Institute
2000
The University of Tokyo
1995
Abstract An incubation experiment was conducted to examine the effects of phosphorus (P) application on nitrous oxide (N2O) and nitric (NO) emissions from soils an Acacia mangium plantation in Indonesia. The were incubated with without addition P (Ca[H2PO4]2; 2 mg g soil)−1) after adjusting water-filled pore space (WFPS) 75% or 100%. increased N2O under both WFPS conditions NO at WFPS. Some possible mechanisms are considered. First, stimulated nitrogen (N) cycling, N used for nitrification...
We measured gas fluxes of carbon dioxide (CO 2 ), methane (CH 4 and nitrous oxide (N O) from the soil surface to atmosphere under various land uses in Sumatra, Indonesia, September 1997. Four land‐use types, i.e., old‐growth forest, logged‐over burned site after logging, rubber plantation site, were selected. One forest was clear‐cut middle experiment. An incubation experiment also performed measure potential these three gases' emissions by using intact cores. The ranges flux for 1 year CO ,...
Estimation of carbon sequestration in the forest sector should take into consideration changes stock all pools, including above-ground and below-ground biomass, litter, deadwood soil. In this review, we discuss current knowledge stocks soil Japan's sector. According to data from published reports nationwide surveys, litter is less than that indicated Intergovernmental Panel on Climate Change (IPCC) guidelines for temperate cool forests; example, coniferous species showed 4.4 Mg C ha−1...
Abstract To determine the means and variations in CH4 uptake N2O emission dominant soil vegetation types to enable estimation of annual gases fluxes forest land Japan, we measured monthly both using a closed-chamber technique at 26 sites throughout Japan over 2 years. No clear seasonal changes rates were observed most sites. was mostly low year, but higher summer The mean (all combined) 66 (2.9–175) µg CH4-C m−2 h−1 1.88 (0.17–12.5) N2O-N h−1, respectively. Annual these years small....
Rhodococcus equi emerged as a zoonotic pathogen of human immunodeficiency virus-infected patients over the last three decades. Two virulence plasmid types R. equi, pVAPA and pVAPB associated with equine porcine isolates, have been recognized, more recently, pVAPN, novel host-associated in was found bovine caprine isolates. We reinvestigated 39 previously reported isolates from without acquired syndrome (AIDS) by detecting vapA, vapB vapN using PCR profiling. After excluding one isolate that...
Abstract Soil is the largest carbon reservoir in terrestrial ecosystems; it stores twice as much atmosphere. It well documented that global warming can lead to accelerated microbial decomposition of soil organic (SOC) and enhance release CO 2 from atmosphere; however, magnitude timing this effect remain highly uncertain due a lack quantitative data concerning heterogeneity SOC biodegradability. Therefore, we sought identify pools with respect their specific mean residence times (MRTs), use...
We compared nitrous oxide (N 2 O) emissions over 1 year from soils of plantations growing acacia, which is a leguminous plant capable symbiotic nitrogen fixation in root nodules, and secondary forests Sumatra, Indonesia. N O acacia plantation fluctuated seasonally, high the wetter season to low drier season, whereas forest were throughout year. Water‐filled‐pore‐space data showed that denitrification contributed substantially at sites. The average annual flux was 2.56 kg ha −1 , eight times...
Forest soils are a source/sink of greenhouse gases, and have significant impacts on the budget these terrestrial gases. Here, we show climate-driven changes in soil GHG fluxes (CO₂ emission, CH₄ uptake, N₂O emission) Japanese forests from 1980 to 2009, which were estimated using regional model that is data-oriented. Our study reveals been increasing over past 30 years at rate 0.31 Tg C yr⁻² for CO₂ (0.23 % yr⁻¹, relative average 2009), 0.40 Gg (0.44 yr⁻¹), 0.0052 N (0.27 yr⁻¹). estimates...
Large-scale processing of lignocellulosics for glucose production generally relies on high temperature and acidic or alkaline conditions. However, extreme conditions produce chemical contaminants that complicate downstream processing. A method mainly rely mechanical enzymatic reaction completely averts such problem generates unmodified lignin. Products from this process could find novel applications in the chemicals, feed food industry. But a large-scale system suitable purpose is yet to be...