A5038625103- Atmospheric and Environmental Gas Dynamics
- Atmospheric Ozone and Climate
- Cryospheric studies and observations
- Atmospheric chemistry and aerosols
- Particle accelerators and beam dynamics
- Polar Research and Ecology
- Atmospheric aerosols and clouds
- Magnetic confinement fusion research
- Methane Hydrates and Related Phenomena
- Arctic and Antarctic ice dynamics
- Nuclear Physics and Applications
- Aquatic Ecosystems and Phytoplankton Dynamics
- Freshwater macroinvertebrate diversity and ecology
- Geology and Paleoclimatology Research
- Meteorological Phenomena and Simulations
- Smart Materials for Construction
- Icing and De-icing Technologies
- Spacecraft and Cryogenic Technologies
- Climate change and permafrost
- Soil and Water Nutrient Dynamics
- Space Exploration and Technology
- Plant Pathogens and Resistance
- Spaceflight effects on biology
- Plant and Fungal Species Descriptions
- Geological Studies and Exploration
Fukushima University
2019-2024
Kōchi University
2017
Toho University
2017
National Institute of Polar Research
1989-1999
Tohoku University
1991
Abstract Aim We studied global variation in beta diversity patterns of lake macrophytes using regional data from across the world. Specifically, we examined (1) how aquatic is partitioned between species turnover and nestedness within each study region, (2) which environmental characteristics structure these components. Location Global. Methods used presence–absence for 21 regions distributed around calculated pairwise‐site multiple‐site among lakes region Sørensen dissimilarity index it...
Abstract Aims Grassland plant species diversity is affected by local, temporal and landscape environmental factors, but what the relative importance of those factors? Understanding this crucial for effective conservation grassland vegetation. We analyzed factors affecting richness to contribute native alien management in Location Semi‐natural grasslands Shiroi City, Chiba Prefecture, Japan. Methods The composition 36 was surveyed 2014. Plants were classified as specialist, other or species....
A small semiartificial pond, revealing high species richness with respect to the aquatic macrophytes, was studied in Aomori Prefecture, Japan. The pond had been completely formed ca. 10 years previously after excavation into a wet bog. To identify and evaluate its macrophyte flora during 2017–2018, we listed of vascular plants charophytes compared this list those from natural Japanese lakes using database Two were identified by molecular analyses because they lacked any reproductive organs,...
of each particle was analyzed with a scanning electron microscope and an energy dispersive X ray microanalyzer.In order to estimate the origin aerosol particles, back trajectories air parcels which arrived at observation site were determined on 850 mb charts.They well correlated time changes number concentration particles also chemical composition particle.In cases when seemed from travel around slowly moving low pressure over Norwegian Sea, indicated values for several days, constituents...
東北地方北部に位置するカルデラ湖の十和田湖において,2021年に水生植物相の調査を行った。調査の結果,水生植物20分類群が確認され,このうち既報の種1種が再同定され,5種が新産種であった。更新された植物相データに基づき,山ノ内ら(2016)と同じ手法で65湖沼を対象に現存種数と現存種の希少性を指標とした保全上の重要性を評価した。その結果,十和田湖は現存種数の多さでは65湖沼中19位から同12位に,希少性では65湖沼中17位から同8位に評価が向上し,これまで考えられていたより保全上の重要性が高いことが明らかになった。また,妥当な評価のためには精度の高い水生植物相データが重要であることが確認された。2014年に初めて十和田湖への侵入が報告されたコカナダモは,2021年には湖内全体に拡大して一部で大きな群落を形成しており,在来生態系への影響が懸念された。