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HOE-PhoR - I CAFÉ Calls 8 th March, 2013 Karin Björkman
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Ship traffic around the Hawaiian Islands (2008-2009)
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Station ALOHA Ship traffic around the Hawaiian Islands (2008-2009)
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Phosphate climatology at Station ALOHA Karl 2013, ARMS
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Current cruise roster HOE-PhoR I Karin Björkman UH Kristina Fontanez MIT (+1) Mak Saito WHOI (+2) Solange Duhamel LDEO Sonya Dyhrman LDEO (+1) Sheean Haley LDEO Sam Wilson UH (+1) Sarah Searson UH Ken Doggett UH Daniela del Valle UH Vanessa Michelou UH Gonzalo Carrasco MIT Mengli Chen MIT John Casey UH Andres Cubillos-Ruiz MIT Dean Jacobsen C of M Isl Ty Samo UH Steve Poulos UH Interns (2) UH OTG (2) Sum: 27 berths (1 free!)
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Proposed P-centric possibilities A) Comprehensive inventory of P-compound at Station ALOHA: - Dissolved and particulate pools (what can we tackle?) - 3-5 depths (to be determined) B) Diel studies: - Microbial populations dynamics - P-pool dynamics - “-omics” C) “forced” P-limitation/DOP utilization experiments: (on-deck incubations) - P-stripping with brucite (as BiG-RAPA) - nutrient enrichment (DSW, nitrate, ammonium) - biomass enrichment (bulk community, N-fixers)
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Other proposed work A) Sediment trap array (PIT): High resolution depth profile (~12 crosses); type (live/dead/other) B) Direct measurements of alkaline phosphatase: Methods development (M. Saito lab) C) Trace metal concentrations: Daily surface sampling. One depth profile (E. Boyle via GC). This will include Zn D) Incubation experiments: SD/GC – trace metals and APase activity SD/KB/KD – group specific uptake of selected DOP compounds KF - microbial processing of material collected from the sed traps SD/SH – 2.5L and 20L on-deck incubations E) Some other: DdV –methylphosphonate metabolism studies SW – reduced gases, measuring of reduced P (PO3, methods development)
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Next meeting (March 20-22??) Discuss what experiments are of “community” interest Discuss experimental designs Determine core measurements needed Discuss who/what lab responsible for what analyses Cross-connections between labs/people – possible collaborations?
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Next meeting (March 20-22??) Interested in this meeting? Please contact: Karin – bjorkman@hawaii.edubjorkman@hawaii.edu Kristina – fontanez@mit.edufontanez@mit.edu
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