English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

In an aquatic environment, microalgae (mainly phytoplankton) and heterotrophic bacteria are numerous and are considered to interact with each other, negatively or positively. Biomass, productivity, heterotrophic activi ty and species composition of bacterial population in freshwaters and seawaters are regulated by the organic and inorganic substances excreted from microalgal cells.1,2) On the other hand, a bacterial population might be related to a change of microalgal community, through nutrient regeneration, competition for nutrients, production of stimulative or inhibitory substances for algal growth and other means.3-7) Hence, the development and decay pro cess of a microalgal bloom (a red tide), which can be de fined as explosive growth of one or a few species of microalgae on a usual change of microalgal community structure, should be also influenced by a heterotrophic bac terial population. Some researchers have reported that some bacteria iso lated from freshwaters and seawaters affect positively or negatively the growth of various kinds of microalgae.8-13) In particular, the marine bacteria which possess an inhibi tory activity on algal growth have been isolated from coastal seawaters, and considered to be related with the decay process of red tides. 14-20) There is relatively little in formation on the distribution, fluctuation and community structure of these bacterial populations in aquatic environ ments, except for the reports mentioned above. Previously we reported the distribution and fluctuation of the bacteria which inhibit the growth of Gymnodinium mikimotoi, dinoflagellate, by the newly developed MPN (most probable number) method during the process of the huge red tide by G. mikimotoi that occurred in Tanabe Bay (Japan) in 1990.21) The fluctuation of the G. mikimotoi's-growth inhibiting bacteria (Gm-GIB) correlat ed negatively with the fluctuation of G. mikimotoi, suggest ing that Gm-GIB is strongly related with the development and decay process of the red tide by G. mikimotoi. In this study, the taxonomic grouping of Gm-GIB isolat ed in 1990 was examined, to analyze the community struc ture of Gm-GIB. We also studied the effects of Gm-GIB on the growth of several marine microalgae to discuss the participation of Gm-GIB in the change of microalgal com munity.

fisheries science

Analysis of Algicidal Ranges of the Bacteria Killing the Marine Dinoflagellate &lt;i&gt;Gymnodinium mikimotoi&lt;/i&gt; Isolated from Tanabe Bay, Wakayama Pref., Japan