A5073763725- Aquatic Ecosystems and Phytoplankton Dynamics
- Coastal wetland ecosystem dynamics
- Marine and coastal ecosystems
- Botany, Ecology, and Taxonomy Studies
- Marine and coastal plant biology
- Ecology and Conservation Studies
- Genetic diversity and population structure
- Isotope Analysis in Ecology
- Rangeland and Wildlife Management
- Freshwater macroinvertebrate diversity and ecology
- Biocrusts and Microbial Ecology
- Aquatic Invertebrate Ecology and Behavior
- Water Quality Monitoring Technologies
- Water Quality and Pollution Assessment
- Soil and Water Nutrient Dynamics
- Bryophyte Studies and Records
- Marine Biology and Ecology Research
- Environmental DNA in Biodiversity Studies
- Geology and Paleoclimatology Research
- Peatlands and Wetlands Ecology
- Land Use and Ecosystem Services
- Remote-Sensing Image Classification
- Diatoms and Algae Research
- Plant responses to water stress
- Biological Control of Invasive Species
Shimane University
2007-2021
University of Shimane
1985-2013
Keio University
2012
National Museum of Nature and Science
2012
Tottori University
2012
Tokyo Metropolitan University
1981-1982
The life cycle and growth ofPotamogeton crispus L. were studied in a shallow pond, Ojaga-ike. With respect to the shoot elongation seed turion formations, of this plant pond could be divided into following five stages: germination, inactive growth, active reproductive dormant stages. It was suggested that showed these successive stages depending mainly upon water temperature. turions germinated on bottom autumn when temperature fell below ca. 20 C. hardly any during winter (December—early...
The magnitude and frequency of disturbances affect species diversity spatial distributions, but the direct effects large-scale on genetic are poorly understood. On March 11, 2011, Great Tohoku Earthquake in Japan caused a massive tsunami that resulted substantial alteration community compositions. Populations near-threatened tidal marsh Carex rugulosa inhabiting brackish sandbars was also affected. We found four out six remnant C. populations along Pacific Ocean had become completely...
In this study, we estimated the growth area of aquatic macrophytes that have expanded spontaneously in Lake Shinji, located eastern Shimane Prefecture, Japan, using Terra satellite Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) data. Visible near infrared ASTER data from April, August, September 2012 were used. The water depth at which can detect submersed situ spectral reflectance a bio-optical model was also examined. As result, when threshold value normalized...
Composition of meio- and macroinvertebrates associated with aquatic macrophytes was compared between acid waters in a peat swamp area Central Kalimantan (CK) neutral West Java (WJ). Among the invertebrate assemblages, cladocerans and/or copepods dominated both regions. On other hand, relative abundances chironomids ostracods were significantly higher CK WJ, respectively. Eighteen taxa oligochaetes recorded from regions, which 14 ones belonged to subfamily Naidinae family Tubificidae. The...
Abstract Carex rugulosa Kük. develops riverside vegetation in brackish marshes along the lower parts of rivers. Because rhizomatous ramets grow densely (590–950/m 2 ) its developed population, it is expected that seedlings cannot get enough light to if seeds germinate crowded ramets. We studied reproductive contribution seed a marshy meadow Ohashi River, Japan. The number produced was 6900–14 200/m 2002. buried following germination season differed among sites from 1190 2690/m . No were...
Abstracts We developed 12 polymorphic microsatellite markers from a salt‐marsh sedge Carex rugulosa. The number of alleles per locus ranged two to four, with an average 2.75. observed and expected heterozygosities 0.067 0.600 0.128 0.620, respectively. These simple sequence repeat will allow the identification genets evaluation genetic diversity C. rugulosa .
Nutrient loadings from upstream watersheds can have significant impacts on the water quality of receiving bodies. Usually, a major river is selected as target for studies, and impact minor rivers tends to be ignored. It very important evaluate whether small downstream negligible. River sampling discharge modeling using SWAT were used analyze contribution in lake. From this analysis, it was determined that inflowing total nitrogen (TN) phosphorus (TP) concentrations all exceeded lake...
Spatial, temporal and vertical variation of distribution in Asian mussels (Arcuatula senhousia) were described via belt transect observations by scuba diving, the mussel bed coverage a brackish river was observed over 3-year period (2012–2014). The spatial changes showed similar pattern period: spread from deeper part toward shallow river. Temporal followed two patterns: one expansion spring to summer retreat during autumn, other late autumn following autumn. relationship between...