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http://dx.doi.org/10.4490/algae.2016.31.10.20

Flora of drift plastics: a new red algal genus, Tsunamia transpacifica(Stylonematophyceae) from Japanese tsunami debris in the northeast Pacific Ocean  

West, John A. (School of Biosciences 2, University of Melbourne)
Hansen, Gayle I. (Oregon State University, HMSC-EPA)
Hanyuda, Takeaki (Kobe University Research Center for Inland Seas)
Zuccarello, Giuseppe C. (School of Biological Sciences, Victoria University of Wellington)
Publication Information
ALGAE / v.31, no.4, 2016 , pp. 289-301 More about this Journal
Abstract
Floating debris provides substrates for dispersal of organisms by ocean currents, including algae that thrive on plastics. The 2011 earthquake and tsunami in Tohuku, Japan resulted in large amounts of debris carried by the North Pacific Current to North America from 2012 to 2016. In 2015-2016, the plastics in the debris bore a complex biota including pink algal crusts. One sample (JAW4874) was isolated into culture and a three-gene phylogeny (psbA, rbcL, and SSU) indicated it was an unknown member of the red algal class Stylonematophyceae. It is a small pulvinate crust of radiating, branched, uniseriate filaments with cells containing a single centrally suspended nucleus and a single purple to pink, multi-lobed, parietal plastid lacking a pyrenoid. Cells can be released as spores that attach and germinate to form straight filaments by transverse apical cell divisions, and subsequent longitudinal and oblique intercalary divisions produce masses of lateral branches. This alga is named Tsunamia transpacifica gen. nov. et sp. nov. Sequencing of additional samples of red algal crusts on plastics revealed another undescribed Stylonematophycean species, suggesting that these algae may be frequent on drift oceanic plastics.
Keywords
biodiversity; dispersal; Japan; Oregon; plastic debris; psbA; rbcL; taxonomy; tsunami; Washington; 18S rDNA;
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