Norio Tanaka

Junji Yagisawa2
Robert B. Kaul1
M. B. Samarakoon1
Dirk C. Albach1
2Junji Yagisawa
1Robert B. Kaul
1M. B. Samarakoon
1Dirk C. Albach
Learn More
Recent molecular phylogenetic studies reported high diversity of Ruppia species in the Mediterranean. Multiple taxa, including apparent endemics, are known from that region, however, they have thus far not been exposed to phylogenetic analyses aimed at studying their relationships to taxa from other parts of the world. Here we present a comprehensive(More)
The aquatic and wetland ephemeral genus Isolepis (Cyperaceae) comprises 76 species mostly in the southern hemisphere, and especially Africa and Australasia. The latest taxonomic revision recognizes three subgenera (Fluitantes, Isolepis and Micranthae) and three sections in subgen. Isolepis. Subgen. Fluitantes, mat-forming perennial herbs typically bearing a(More)
The diploid aquatic genus Sparganium (Typhaceae) comprises ca. 14 species mainly in cool temperate regions of the world. Among these, S. emersum comprises two infraspecific taxa, subspecies acaule from eastern North America and subspecies emersum from Eurasia and western North America (and occasionally from eastern North America as well). However, there has(More)
Although medium-class flood disturbance is highly correlated with diversity of vegetated area of river habitat, it is still not clearly defined due to its complexity. To describe flood disturbance characteristics, two indices, breakage or overturning index and washout index, are used to express the breaking condition of trees and washout condition of trees(More)
The treatment efficiencies of floating treatment wetlands (FTWs) containing two types of macrophytes, Typha angustifolia and Canna iridiflora, were investigated in a pilot scale study in the tropical climate of Sri Lanka. In batch experiments, over 80 % of biological oxygen demand (BOD5) and ammonium (NH 4 + -N) removal was observed, while nitrate (NO 3 −(More)
The effects on Robinia pseudoacacia (an exotic and invasive plant in Japanese rivers) of local scouring and saturation of the soil in the root-anchoring zone due to flooding were investigated. Scouring has been defined as the removal of substrate in the root-anchoring zone, exposing the tree roots. Tree-pulling experiments were conducted, simulating flood(More)
  • 1