M. Sato
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View article: <i>Crocosphaera</i>as a Major Consumer of Fixed Nitrogen
<i>Crocosphaera</i>as a Major Consumer of Fixed Nitrogen Open
Crocosphaera watsonii is as a key nitrogen (N) supplier in marine ecosystems, and it has been estimated to contribute up to half of oceanic N 2 fixation. Conversely, a recent study reported that Crocosphaera can assimilate combined N and p…
View article: Using metatranscriptomics to estimate the diversity and composition of zooplankton communities
Using metatranscriptomics to estimate the diversity and composition of zooplankton communities Open
DNA metabarcoding is a rapid, high‐resolution tool used for biomonitoring complex zooplankton communities. However, diversity estimates derived with this approach can be biased by the co‐detection of sequences from environmental DNA (eDNA)…
View article: Regionally Variable Responses of Nitrogen Fixation to Iron and Phosphorus Enrichment in the Pacific Ocean
Regionally Variable Responses of Nitrogen Fixation to Iron and Phosphorus Enrichment in the Pacific Ocean Open
Iron and phosphorus are major nutrients limiting marine nitrogen fixation. We directly assessed iron and phosphate enrichment using the surface water of the western and central North Pacific subtropical gyre (NPSG), central equatorial Paci…
View article: Longitudinal and Vertical Variations of Dissolved Labile Phosphoric Monoesters and Diesters in the Subtropical North Pacific
Longitudinal and Vertical Variations of Dissolved Labile Phosphoric Monoesters and Diesters in the Subtropical North Pacific Open
The labile fraction of dissolved organic phosphorus (DOP) – predominantly consisting of phosphoric esters – is an important microbial P source in the subtropical oligotrophic ocean. However, unlike phosphate, knowledge for labile DOP is st…
View article: Metatranscriptomics provides closer diversity and composition estimates with morphology than PCR-based methods: a zooplankton mock community case study
Metatranscriptomics provides closer diversity and composition estimates with morphology than PCR-based methods: a zooplankton mock community case study Open
Studying complex metazoan communities requires taxonomic expertise and laborious work if done using the traditional morphological approach. Nowadays, the popular use of molecular-based methods accompanied by massively parallel sequencing (…
View article: Biogeochemical Controls of Particulate Phosphorus Distribution Across the Oligotrophic Subtropical Pacific Ocean
Biogeochemical Controls of Particulate Phosphorus Distribution Across the Oligotrophic Subtropical Pacific Ocean Open
We investigated basin‐wide distributions of total particulate phosphorus (TPP) and associated biogeochemical parameters in the euphotic zone (EZ) of the subtropical North and South Pacific Ocean. TPP is primarily composed of living microor…
View article: Against the Storm: How Japanese printworkers resisted the military regime, 1935-1945
Against the Storm: How Japanese printworkers resisted the military regime, 1935-1945 Open
Japan's ruling class's wartime project of militarisation and imperialist domination is well-documented in the English language but the active resistance of the working class and general population is less well-known. Sugiura Masao's Agains…
View article: Basin‐Scale Variations in Labile Dissolved Phosphoric Monoesters and Diesters in the Central North Pacific Ocean
Basin‐Scale Variations in Labile Dissolved Phosphoric Monoesters and Diesters in the Central North Pacific Ocean Open
Labile dissolved phosphoric esters act as important phosphorus sources for microorganisms in the low‐phosphate oligotrophic ocean. Despite the significant role of labile dissolved phosphoric esters, previous studies have only focused on ph…
View article: Growth characteristics of shade-acclimated marine Chlorella vulgaris under high-cell-density conditions
Growth characteristics of shade-acclimated marine Chlorella vulgaris under high-cell-density conditions Open
Interpretation :To potentially improve the productivity of microalgae for mass culture, growth characteristics and light-saturation index ( ) in the marine microalga were investigated under high-celldensity conditions grown in batch cultur…
View article: Linkage Between Dinitrogen Fixation and Primary Production in the Oligotrophic South Pacific Ocean
Linkage Between Dinitrogen Fixation and Primary Production in the Oligotrophic South Pacific Ocean Open
The import of nitrogen via dinitrogen fixation supports primary production, particularly in the oligotrophic ocean; however, to what extent dinitrogen fixation influences primary production, and the role of specific types of diazotrophs, r…
View article: Studies on the dynamics of pico- and nanophytoplankton in oligotrophic oceans in relation to nutrient availability
Studies on the dynamics of pico- and nanophytoplankton in oligotrophic oceans in relation to nutrient availability Open
ピコ・ナノ植物プランクトンは外洋における主要な一次生産者であり，食物網の起点である。本論文ではピコ・ナノ植物プランクトンの組成と分布，栄養獲得，被食過程について著者らが行ってきた研究の内容と成果を概説する。はじめに，フローサイトメトリーにより代表的なピコ・ナノ植物プランクトングループの分布やサイズ組成を明らかにし，その生理的な特徴や環境因子と分布を関連づけた。つづいて，ピコ・ナノ植物プランクトンが多様な群集組成を呈する要因の一つとしてリンや鉄の利用に着目し，特に，外洋域で重…
View article: Phosphate release due to excess alkaline phosphatase activity in <i>Trichodesmium erythraeum</i>
Phosphate release due to excess alkaline phosphatase activity in <i>Trichodesmium erythraeum</i> Open
We investigated the dependence of alkaline phosphatase activity (APA) on temperature and light intensity in cultured strains of the diazotroph Trichodesmium erythraeum isolated from the Kuroshio Current in the East China Sea. In contrast t…