| アイテムタイプ |
学術雑誌論文 / Journal Article(1) |
| 公開日 |
2025-05-19 |
| タイトル |
|
|
タイトル |
Effects of pH and ultrasonication for decomposition of Microcystis formed colony in a bloom sample from a reservoir |
|
言語 |
en |
| 言語 |
|
|
言語 |
eng |
| キーワード |
|
|
言語 |
en |
|
主題Scheme |
Other |
|
主題 |
PH |
| キーワード |
|
|
言語 |
en |
|
主題Scheme |
Other |
|
主題 |
Ultrasonication |
| キーワード |
|
|
言語 |
en |
|
主題Scheme |
Other |
|
主題 |
Toxic Microcystis |
| キーワード |
|
|
言語 |
en |
|
主題Scheme |
Other |
|
主題 |
Non-toxic Microcystis |
| キーワード |
|
|
言語 |
en |
|
主題Scheme |
Other |
|
主題 |
Microfauna |
| キーワード |
|
|
言語 |
en |
|
主題Scheme |
Other |
|
主題 |
Predation |
| 資源タイプ |
|
|
資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
|
資源タイプ |
journal article |
| 著者 |
Saenchan, Somsri
Shimizu, Kazuya
Iwami, Norio
Angalika, Misigo W.S.
Maseda, Hideaki
Minh, Nguyen Binh
Vu, Huynh V.
Truc-Ly, Le-Huynh
Itayam, Tomoaki
|
| 抄録 |
|
|
内容記述タイプ |
Abstract |
|
内容記述 |
In this study, we investigated the effects of pH and ultrasonication on Microcystis degradation in bloom samples consisting predominantly of colonial Microcystis. The biofilm-spiked bloom samples were incubated for 7 days with shaking at low pH (7−8) and high pH (9−10) conditions in the dark. This resulted in a significant decrease in chlorophyll-a at the low pH condition compared to the high pH condition. Conversely, Bayesian regression analysis indicated that the difference in the degradation rate of Chl-a with and without ultrasonication treatment was not statistically significant. It was hypothesized that the dispersed cells rapidly reaggregated, which inhibited the degradation of Microcystis cells. The degradation rate of the IPC gene (intergenic spacer region within the phycocyanin operon) and the mcyB gene (microcystin synthesis gene) demonstrated enhanced degradation rates at low pH conditions relative to high pH conditions, as well as Chl-a. The proliferation of microfauna, including rotifers and protozoa, and the active predation of Microcystis cells were confirmed through microscopic observation under low pH conditions. Notwithstanding the high pH condition, some protozoan species were observed. However, many Microcystis cells and colonies remained. The comparison of the decomposition rates of the IPC gene and the mcyB gene using Bayesian analysis revealed that non-toxic were slightly more preferred than toxic Microcystis cells in the predation process. The estimated cost for adjusting the pH of a small eutrophicated reservoir to pH 7 using industrial sulfuric acid to enhance predation falls within the range of costs that could be considered for practical implementation. |
|
言語 |
en |
| 書誌情報 |
en : Desalination and Water Treatment
巻 322,
p. art. no. 101203,
発行日 2025-05-09
|
| 出版者 |
|
|
出版者 |
Elsevier Inc |
|
言語 |
en |
| ISSN |
|
|
収録物識別子タイプ |
EISSN |
|
収録物識別子 |
19443986 |
| DOI |
|
|
関連タイプ |
isIdenticalTo |
|
|
識別子タイプ |
DOI |
|
|
関連識別子 |
10.1016/j.dwt.2025.101203 |
| 権利 |
|
|
権利情報 |
© 2025 The Authors. Published by Elsevier Inc. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). |
|
言語 |
en |
| 著者版フラグ |
|
|
出版タイプ |
VoR |
|
出版タイプResource |
http://purl.org/coar/version/c_970fb48d4fbd8a85 |
| 引用 |
|
|
内容記述タイプ |
Other |
|
内容記述 |
Desalination and Water Treatment, 322, art. no. 101203; 2025 |
|
言語 |
en |
DWT322_101203.pdf (6.3 MB)
