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The red tide and Myrionecta rubra’s ecological impact and dynamic in the Columbia River estuary

The red tide and Myrionecta rubra’s ecological impact and dynamic in the Columbia River estuary. Intern: Rachel Warnick Frontline Mentor: Lydie Herfort Senior Mentor: Peter Zuber. Myrionecta Rubra. Ciliate Karyoklepty Cryptophyte algae ( Teleaulax) Red tide blooms in estuary

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The red tide and Myrionecta rubra’s ecological impact and dynamic in the Columbia River estuary

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  1. The red tide and Myrionecta rubra’s ecological impact and dynamic in the Columbia River estuary Intern: Rachel Warnick Frontline Mentor: Lydie Herfort Senior Mentor: Peter Zuber

  2. Myrionecta Rubra • Ciliate • Karyoklepty • Cryptophyte algae (Teleaulax) • Red tide blooms in estuary • High primary productivity • Possible sentinel? Cryptophyte nucleus

  3. Our Question 1 • How does the M. rubra bloom start? • Where do the cryptophytes come from? Assimilated model data image of surface water circulation in the Columbia River estuary (CMOP, Antonio Baptista)

  4. Sampling Locations • Willapa Bay • Ilwaco Harbor • Chinook Harbor • Hammond • North Channel of Estuary

  5. 2009 Bloom Timeline Red tide evident both in Baker Bay and the estuary July 21 August 5 June 30 M. rubra and cryptophyte detected in samples from Baker Bay, not detected in estuary main channel No red tide in Baker Bay nor in the estuary Insert M. rubra cell counts??? Pictures taken by Tawnya Peterson of July 21, 2009 Baker Bay/ Ilwaco sample

  6. How does the M. rubra bloom start? Red tide evident both in Baker Bay and the estuary July 21 August 5 June 30 M. rubra and cryptophyte detected in samples from Baker Bay, not detected in estuary main channel No red tide in Baker Bay nor in the estuary Pictures taken by Tawnya Peterson of July 21, 2009 Baker Bay/ Ilwaco sample

  7. Our Question 2 • Are different strains of M. rubra and its cryptophyte prey found at different times and locations in the Columbia River Estuary system? Phylogenetic tree of the cryptophyte chloroplast 16S rRNA gene sequences from the 2007 and 2008 Columbia River estuary M. rubra bloom. Herfort et al 2009 (In Prep)

  8. Genetic Markers • 18S= 18S rRNA gene, ribosomal sequence frequently used for phylogenetic analysis • ITS= Internal transcribed spacer, a variable DNA region ITS region oMR Euk A Euk B 5.8S 28S 18S RUBICSO gene of cryptophyte L1R Our M. rubra ITS sequence 5.8S L2F

  9. 1242 M. rubra NCBI database sequence 1556 1 1051 1 18S M. rubra sequence Our new M. rubra ITS sequence 743

  10. Conclusions continued • Is there variation, both temporally and spatially, in the strain of M. rubra and the strain of its cryptophyte prey in the Columbia River Estuary system? Insert rubisco phylogenetic tree here???

  11. Any Questions? 27 Sept 2008 Picture taken by Alex Derr

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