Seasonal changes in the communities of photosynthetic picoeukaryotes in Ofunato Bay as revealed by shotgun metagenomic sequencing.

Autor: Rashid J; Kitasato University School of Marine Biosciences, Minami-ku, Sagamihara, Kanagawa 252-0373, Japan., Kobiyama A; Kitasato University School of Marine Biosciences, Minami-ku, Sagamihara, Kanagawa 252-0373, Japan., Reza MS; Kitasato University School of Marine Biosciences, Minami-ku, Sagamihara, Kanagawa 252-0373, Japan., Yamada Y; Kitasato University School of Marine Biosciences, Minami-ku, Sagamihara, Kanagawa 252-0373, Japan., Ikeda Y; Kitasato University School of Marine Biosciences, Minami-ku, Sagamihara, Kanagawa 252-0373, Japan., Ikeda D; Kitasato University School of Marine Biosciences, Minami-ku, Sagamihara, Kanagawa 252-0373, Japan., Mizusawa N; Kitasato University School of Marine Biosciences, Minami-ku, Sagamihara, Kanagawa 252-0373, Japan., Ikeo K; Kitasato University School of Marine Biosciences, Minami-ku, Sagamihara, Kanagawa 252-0373, Japan., Sato S; Kitasato University School of Marine Biosciences, Minami-ku, Sagamihara, Kanagawa 252-0373, Japan., Ogata T; Kitasato University School of Marine Biosciences, Minami-ku, Sagamihara, Kanagawa 252-0373, Japan., Kudo T; Kitasato University School of Marine Biosciences, Minami-ku, Sagamihara, Kanagawa 252-0373, Japan., Kaga S; Iwate Fisheries Technology Center, Kamaishi, Iwate 026-0001, Japan., Watanabe S; Iwate Fisheries Technology Center, Kamaishi, Iwate 026-0001, Japan., Naiki K; Iwate Fisheries Technology Center, Kamaishi, Iwate 026-0001, Japan., Kaga Y; Iwate Fisheries Technology Center, Kamaishi, Iwate 026-0001, Japan., Mineta K; King Abdullah University of Science and Technology, Computational Bioscience Research Center, Thuwal 23955-6900, Saudi Arabia., Bajic V; King Abdullah University of Science and Technology, Computational Bioscience Research Center, Thuwal 23955-6900, Saudi Arabia., Gojobori T; King Abdullah University of Science and Technology, Computational Bioscience Research Center, Thuwal 23955-6900, Saudi Arabia. Electronic address: takashi.gojobori@kaust.edu.sa., Watabe S; Kitasato University School of Marine Biosciences, Minami-ku, Sagamihara, Kanagawa 252-0373, Japan. Electronic address: swatabe@kitasato-u.ac.jp.
Jazyk: angličtina
Zdroj: Gene [Gene] 2018 Jul 30; Vol. 665, pp. 127-132. Date of Electronic Publication: 2018 Apr 30.
DOI: 10.1016/j.gene.2018.04.071
Abstrakt: Small photosynthetic eukaryotes play important roles in oceanic food webs in coastal regions. We investigated seasonal changes in the communities of photosynthetic picoeukaryotes (PPEs) of the class Mamiellophyceae, including the genera Bathycoccus, Micromonas and Ostreococcus, in Ofunato Bay, which is located in northeastern Japan and faces the Pacific Ocean. The abundances of PPEs were assessed over a period of one year in 2015 at three sampling stations, KSt. 1 (innermost bay area), KSt. 2 (middle bay area) and KSt. 3 (bay entrance area) at depths of 1 m (KSt. 1, KSt. 2 and KSt. 3), 8 m (KSt. 1) or 10 m (KSt. 2 and KSt. 3) by employing MiSeq shotgun metagenomic sequencing. The total abundances of Bathycoccus, Ostreococcus and Micromonas were in the ranges of 42-49%, 35-49% and 13-17%, respectively. Considering all assayed sampling stations and depths, seasonal changes revealed high abundances of PPEs during the winter and summer and low abundances during late winter to early spring and late summer to early autumn. Bathycoccus was most abundant in the winter, and Ostreococcus showed a high abundance during the summer. Another genus, Micromonas, was relatively low in abundance throughout the study period. Taken together with previously suggested blooming periods of phytoplankton, as revealed by chlorophyll a concentrations in Ofunato Bay during spring and autumn, these results for PPEs suggest that greater phytoplankton blooming has a negative influence on the seasonal occurrences of PPEs in the bay.
(Copyright © 2018 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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