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- W2043682007 abstract "MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsTheme Sections MEPS 212:79-88 (2001) - doi:10.3354/meps212079 Temporal variations in transparent exopolymer particles (TEP) associated with a diatom spring bloom in a subarctic ria in Japan Neelam Ramaiah*, Takashi Yoshikawa, Ken Furuya Department of Aquatic Bioscience, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Bunkyo, Tokyo 113-8657, Japan *E-mail: neelam@aujaghi.fs.a.u-tokyo.ac.jp ABSTRACT: Temporal variations in transparent exopolymer particles (TEP) were studied during a spring bloom (January to April 1998) in a subarctic ria on the northeast coast of Japan. A diatomdominated bloom developed from mid-February. Two major peaks were recorded in the first and last week of March, during which chlorophyll concentrations reached the maximum of 12 µg l-1. The TEP concentration increased sharply after the first peak, the pre-bloom average of 901 rising to 1442 µg xanthan equiv. l-1. The maximum TEP value of 2321 µg xanthan equiv. l-1 recorded at the surface coincided with the second bloom peak. After this peak, TEP concentration continued to be relatively high. The number of particles fluctuated between 1 and 3.4 x 105 ml-1 (size = 4 to 520 µm) with an increase in small-sized particles following the bloom decline. TEP concentrations in this bay were much higher (avg. 1344 µg xanthan equiv. l-1) than reported elsewhere (avg. 147 to 308 µg xanthan equiv. l-1). Although TEP increased considerably following the bloom, it was interesting to note the high pre-bloom concentrations despite low chlorophyll concentrations. This implied that a source other than phytoplankton was responsible for the release of exudates leading to TEP formation. Laboratory experiments confirmed our assumption that the significantly high background TEP was due to the additional formation of these particles from the extracellular exudates released by the macroalga Undaria pinnatifida, cultivated commercially in this bay. Thus, besides providing information from the subarctic coastal waters of Japan for the first time, our study also confirms the role of macroalgal exudates as an important additional source for the formation of TEP. KEY WORDS: TEP · Spring bloom · Phytoplankton · Macroalgal culture · Subarctic ria Full text in pdf format PreviousNextExport citation RSS - Facebook - Tweet - linkedIn Cited by Published in MEPS Vol. 212. Online publication date: March 08, 2001 Print ISSN: 0171-8630; Online ISSN: 1616-1599 Copyright © 2001 Inter-Research." @default.
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- W2043682007 title "Temporal variations in transparent exopolymer particles (TEP) associated with a diatom spring bloom in a subarctic ria in Japan" @default.
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