Cryptic occurrence of Chattonella marina var. marina in mangrove sediments in Probolinggo, East Java Province, Indonesia

Ayu-Lana-Nafisyah, Endang-Dewi-Masithah, Kazumi Matsuoka, Mirni-Lamid, Mochammad-Amin-Alamsjah, Shizuka O-hara, Kazuhiko Koike

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

Mangrove forests and adjacent creeks are known to be highly productive estuaries, which are partly supported by benthic microalgae that grow on the sediments. During surveys investigating the microalgal floras of mangrove swamps in the eastern part of Java Island, a mud sample unexpectedly included large numbers of a notorious fish killer, Chattonella-like motile cells, and its resting cysts. These motile cells were established as clonal cultures for further identification and physiological tests. The cysts were examined through palynological and molecular biological means. Identification based on light microscopy and ribosomal RNA gene sequences confirmed that these cells and cysts were Chattonella marina var. marina. While the strains were genetically identical to the temperate strains isolated from Japan and China, temperature experiments showed that the Indonesian strains possessed a high maximum quantum yield of photosystem II even after exposure to 34 °C, a temperature at which the Japanese strain could not survive. Salinity experiments showed adaptation of the strains to a salinity of 15. These findings, together with the discovery of populations of cysts in the mangrove sediment, highlight the tough and unique nature of the Indonesian strains, which are likely adapted to wide fluctuations of temperature and salinity in mangrove swamps, and pose a potential risk to fisheries in Indonesia.

Original languageEnglish
Pages (from-to)877-887
Number of pages11
JournalFisheries Science
Volume84
Issue number5
DOIs
Publication statusPublished - 1 Sept 2018

Keywords

  • Raphidophyte
  • Red tide
  • Resting cysts
  • Ribosomal RNA
  • Salinity tolerance
  • Temperature tolerance

Fingerprint

Dive into the research topics of 'Cryptic occurrence of Chattonella marina var. marina in mangrove sediments in Probolinggo, East Java Province, Indonesia'. Together they form a unique fingerprint.

Cite this