scholarly journals Determinations of Humic Substances and Other Dissolved Organic Matter and Their Effects on the Increase of COD in Lake Biwa

2004 ◽  
Vol 20 (1) ◽  
pp. 159-164 ◽  
Author(s):  
Shinichi AOKI ◽  
Yasuro FUSE ◽  
Etsu YAMADA
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Humic Substances ◽  
Lake Biwa

scholarly journals Behavior of Humic Substances and Algal Dissolved Organic Matter as Precursors of Trihalomethane in Lake Biwa

2009 ◽  
Vol 58 (4) ◽  
pp. 231-240 ◽  
Author(s):  
Shinya Ohara ◽  
Takashi Uehara ◽  
Keiichiro Kimura ◽  
Tetsuro Yoshida ◽  
Shohei Fujiwara ◽  
...  
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Humic Substances ◽  
Lake Biwa

scholarly journals Biodegradation of Dissolved Organic Matter (DOM) Released from Phytoplankton in Lake Biwa

2012 ◽  
Vol 28 (7) ◽  
pp. 675-681 ◽  
Author(s):  
Etsu YAMADA ◽  
Shinya OHARA ◽  
Takashi UEHARA ◽  
Takaaki HIROTA ◽  
Naoko HATORI ◽  
...  
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Lake Biwa

scholarly journals Phylogenetic and Functional Diversity of Saprolegniales and Fungi Isolated from Temperate Lakes in Northeast Germany

2021 ◽  
Vol 7 (11) ◽  
pp. 968
Author(s):  
Hossein Masigol ◽  
Jason Nicholas Woodhouse ◽  
Pieter van West ◽  
Reza Mostowfizadeh-Ghalamfarsa ◽  
Keilor Rojas-Jimenez ◽  
...  
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Enzymatic Activity ◽  
Humic Substances ◽  
Plant Litter ◽  
Freshwater Ecosystems ◽  
Chitinolytic Activity ◽  
Ecological Implications ◽  
Eukaryotic Organisms

The contribution of fungi to the degradation of plant litter and transformation of dissolved organic matter (humic substances, in particular) in freshwater ecosystems has received increasing attention recently. However, the role of Saprolegniales as one of the most common eukaryotic organisms is rarely studied. In this study, we isolated and phylogenetically placed 51 fungal and 62 Saprolegniales strains from 12 German lakes. We studied the cellulo-, lignino-, and chitinolytic activity of the strains using plate assays. Furthermore, we determined the capacity of 10 selected strains to utilize 95 different labile compounds, using Biolog FF MicroPlates™. Finally, the ability of three selected strains to utilize maltose and degrade/produce humic substances was measured. Cladosporium and Penicillium were amongst the most prevalent fungal strains, while Saprolegnia, Achlya, and Leptolegnia were the most frequent Saprolegniales strains. Although the isolated strains assigned to genera were phylogenetically similar, their enzymatic activity and physiological profiling were quite diverse. Our results indicate that Saprolegniales, in contrast to fungi, lack ligninolytic activity and are not involved in the production/transformation of humic substances. We hypothesize that Saprolegniales and fungi might have complementary roles in interacting with dissolved organic matter, which has ecological implications for carbon cycling in freshwater ecosystems.

Distribution and characteristics of ultraviolet absorption and fluorescenceof dissolved organic matter in a large lake (Lake Biwa, Japan)

2016 ◽  
Vol 42 (3) ◽  
pp. 571-579 ◽  
Author(s):  
Kazuhide Hayakawa ◽  
Reiji Kojima ◽  
Chizuru Wada ◽  
Tomoyo Suzuki ◽  
Yuko Sugiyama ◽  
...  
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Lake Biwa ◽  
Ultraviolet Absorption ◽  
Large Lake

Three-dimensional fluorescence as a tool for investigating the dynamics of dissolved organic matter in the Lake Biwa watershed

Limnology ◽  
2005 ◽  
Vol 6 (2) ◽  
pp. 101-115 ◽  
Author(s):  
Khan M. G. Mostofa ◽  
Takahito Yoshioka ◽  
Eiichi Konohira ◽  
Eiichiro Tanoue ◽  
Kazuhide Hayakawa ◽  
...  
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Lake Biwa ◽  
Three Dimensional
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