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Mathematical model to explain a regime shift in Lake Takkobu
cyanobacteria Anabaena
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2009/4/1
Mathematical model analysis was used to explain a regime shift of Takkobu Lake in Hokkaido Japan. In this lake, a catastrophic change occurred several years ago from a clear to a turbid water state. O...
Features of Lake Takkobu ecosystem assessed by natural abundance of 13C and 15N
Kushiro Moor lake ecosystem
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2009/4/1
southern part. Seasonally, POM with high δ13C and low δ15N has appeared in summer, whereas the opposite is the case in spring and autumn. Horizontally, the summer POM with both higher δ13C and lower δ...
Distribution and present status of fishes in Lake Takkobu and adjacent rivers
distribution species diversity
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2009/4/1
The distribution and present status of fishes was investigated in Lake Takkobu and adjacent rivers of the Kushiro Mire from July to October, 2003. Gymnogobius castaneus, Hypomesus olidus and Phoxinus ...
Trichoptera fauna of the Kushiro Marsh, northern Japan, with particular references to the fauna of Lake Takkobu
the Kushiro Marsh Japan.
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2009/4/1
2003-2006, the Trichoptera fauna of the Kushiro Marsh was studied in Lake Takkobu, Hokkaido, northern Japan, using chemical light, black light, Malaise trap and insect net. Adults of 52 species belong...
Seasonal changes and horizontal distribution of zooplankton in Lake Takkobu, Kushiro Marsh, Hokkaido
community structure biomass food web
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2009/4/1
The occurrence characteristics of zooplankton in Lake Takkobu, a shallow eutrophic lake located in the eastern edge of the Kushiro wetland in Hokkaido, were studies in 2003. In the lake, 17 species of...
Seasonal changes and horizontal distribution of phytoplankton in Lake Takkobu, Kushiro Wetland
eutrophication CCA HCO3
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2009/4/1
We investigated the seasonal changes and horizontal distribution of phytoplankton taxa in Lake Takkobu, Hokkaido. A clear seasonal succession appeared in this lake, with the unicellular alga of Chryso...
Change in macrophytic flora of Lake Takkobu, Kushiro, Japan, in past 30 years
aquatic macrophyte decline eutrophication
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2009/4/1
The change in macrophytic flora in Lake Takkobu since the mid-1970s was briefly described. At that period floating-leaved plant communities dominated by species such as Nuphar pumila and Potamogeton n...
Environmental factors affecting sedimentation of organic matter in Lake Takkobu, Kushiro Marsh
sediment organic matter
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2009/4/1
In this study, the vertical profiles of C and N of sediment cores at 3 offshore stations were examined to better understand the environmental factors affecting the sedimentation of organic matter in t...
Water quality and factors influencing its distribution in Lake Takkobu
wetland eutrophication
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2009/4/1
Chemical characteristics were investigated using water samples collected at 54 sites in Lake Takkobu and 8 inflow and outlet sites in the summer 2004. Concentrations of 9 elements (Na+, Ca2+, K+, Mg2+...
Restoration for Lake Takkobu in Kushiro Mire
Lake Takkobu Restoration
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2009/4/1
Restoration for Lake Takkobu in Kushiro Mire。