dr. timothy davis...dr. timothy davis noaa’s hab team remote sensing steve ruberg andrea van der...
TRANSCRIPT
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Expanding NOAA's ability to monitor and predict HABevents in western Lake Erie
Dr. Timothy Davis
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NOAA’s HAB Team
Remote SensingSteve RubergAndrea van der WoudeEt al.
MonitoringDuane GossiauxTom JohengenAshley BurtnerDanna PalladinoRuss MillerHeidi PurcellGreg Doucette
ModelingRichard StumpfEric AndersonDan ObenourGeorge LeshkevichGreg LangTimothy WynneCommunicationsSonia Joseph JoshiJoe SmithQuay DortchMarc Suddleson
Photo: Wikipedia
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NOAA uses an integrated approach to studying HABs
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The forecast uses a 12‐year Lake Erie nutrient flow data set, collected by Heidelberg University’s National Center for Water Quality Research, and analysis of satellite data from the European Space Agency’s ENVISAT and NASA’s Terra and Aqua satellites.
NOAA and academic partners predict bloom severity
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2014 HABs Summary
Average HAB extent in Western L. Erie Basin(derived from MODIS)
2011 892 sq.km
2012 221 sq. km.
2013 676 sq. km
2014 470 sq. km
Bloom forecasts: Stumpf – 38%Obenour – 50%
of the 2011 bloom.
Lake Erie Harmful Algal Bloom Summary
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(MT) Stumpf (NOAA) Bridgeman (UT) Forecast B
Figure: Spring TP loads (A) and western basin bloom observations (B) along with 2014 boom forecast and 95% predictive interval (red).
Summary:
In July of 2014, researchers from University of Michigan and NOAA Great Lakes Environmental Research Laboratory (GLERL) forecasted a western basin Lake Erie cyanobacteria bloom of 22,000 metric tons dry weight (MT), with a 95% predictive interval of 11,000 to 33,000 MT. The average observed late‐summer bloom intensity, derived from NOAA remote sensing and University of Toledo field sampling, was approximately 29,000 MT, in general agreement with the forecasted range.
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Weekly HAB sampling in Lake Erie• June – October
• Surface water samples
• Ground‐truth for remote sensing (bloom extent, distribution)
• Parameters:• Temperature• Kpar• CHN• SRP• Particulate P• Total P• NO3 + NO2• NH3• Fluorescence
• Chlorophyll• Particulate and
dissolved microcystins
• Phytoplankton community composition
• Phycocyanin• DNA
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Sensors:. Turner C6, Cyclops sensors
. Chlorophyll, Phycocyanin, Turbidity, CDOM
. Wetlabs Cycle ‐PO4
Western Lake Erie Real‐time HABs Monitoring
= Real-time observation station in 2014
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Continuous inorganic phosphorus monitoring at WLE 4
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Toledo water intake 2014 sampling data
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Total cyanobacteria
Par culate microcys ns
Extracted ph
ycocyanin (μg/L)
Microcystin‐LR equivalents (μg/L)
August 4, 2014
= WHO guideline level for safe drinking water
• The bloom was a typical bloom
• No other cyanotoxins were detected• Cylindrospermopsins and anatoxins have been previously detected in Lake Erie
• No BMAAs were detected or have ever been detected in the Great Lakes
• Highlights the need for more research to further understand the ecology of HABs
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MODISsatellite
estimatesofchlorophyll
valuesforwesternLake
Erie capturingHABs
Remote sensing of HABs in Lake Erie
http://livingbetweenwednesdays.com/?p=486
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Lake Erie hydrodynamic forecasts
Nowcast (observed) Forecast (NDFD)
Lake Erie FVCOM (LEOFS)
• Daily nowcast/forecast (120 hrs)
• Hourly currents
• HAB advection
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NOAA‐GLERLHABTracker
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SensitivityofsimulatedHABverticalconcentrationprofilesandtrajectoriesasafunctionofMicrocystis colonybuoyancy
100mm/s
Time:10‐days
Depth,m
Relativeconcentration
100mm/s 10mm/s ‐10mm/sBuoyant(floatingorsinking)velocity
Time:10‐days Time:10‐days
Latitude
Longitude Longitude Longitude
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R. K. Vincent et al., Remote Sensing of Environment, 89 (2004) 381-392.
. Detect blooms near water intakes when satellite remote sensing products unavailable. Airborne Sensor: 400-900 nm, 2.1 nm res. GLRI funds available for 2015. Pursuing MERHAB for 2016-18
HABsFlyovers
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NOAA‐GLERLHABwebpage
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CyanobacteriaAssessmentNetwork(CyAN)GettingsatelliteoceancolorcapabilitiesintoU.S.waterqualitymgmtdecisions
collaborationofEPAOfficeofWater;NOAANatlCentersCoastalOceanScience;NASA;USGS
Partners• EPAOfficeofWater
– OfficeofWetlands,Oceans,andWatersheds– OfficeofWastewaterManagement– OfficeofScienceandTechnology
• EPARegions• U.S.ArmyCorpsofEngineers• States
– OhioEPA– St.JohnsRiverWMD– S.FloridaWMD
GLNPO
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ValidationofLakeEriealgorithmforotherareaswithEPA;startofCyanobacteriaAssessmentNetwork
• RemoteSensing– Uniformandsystematicapproachforidentifyingcyanobacteriablooms.
• Secondderivativespectralshapealgorithms(SS;Wynneetal.2008)
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Measured
MERIS-Derived
Lunetta,Schaeffer,Stumpfetal.RemoteSensingofEnvironment
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NOAA‐ GLERLmicrocystinsdata
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Waterqualitydata
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Overarching research statement: Understanding the driver of bloom
toxicity will aid in enhancing predictive models that forecast bloom size, location AND toxicity
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Total Microcystis and microcystin
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Total M
icrocystis(x10
7cell eq
uiv. L
‐1)
Microcystin (µg L
‐1)
Total MicrocystisMicrocystin
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Toxic and non‐toxic Microcystis
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icrocystis(x10
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‐1) Toxic M
icrocystis(x104cell equiv. L
‐1)
Non‐toxic MicrocystisToxic Microcystis
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Microcystin (µg L
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Toxic Microcystis(x10
4cell eq
uiv. L‐1)
Toxic MicrocystisMicrocystin
Toxic (mcyD‐containing) Microcystis is a better predictor of microcystin concentrations than either of the parameters currently suggested by WHO.
Davis et al., 2009; Harmful Algae
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Multiplex qPCR: quantifying multiple genes of interest in a single reaction
Photo: cyanosite
16S rRNAmcyE/ndaFcyrAstxA
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Multiplex qPCR: understanding competition among CHAB species in the Great Lakes
• This proposed work would be a continuation of my current grant
• In Lake Erie, cylindrospermopsin, anatoxin, and microcystin have been detected
• The specie(s) responsible for the production of CYN and ATX are currently unknown
• CYN production: Cylindrospermopsis or Aphanizomenon?
• Would significantly enhance models aimed at predicating bloom toxicity
• Conducting mechanistic experiments that would help elucidate the competition between potential cyanotoxin producers
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Elucidating ecological adaptions of Great Lakes CHAB species
• Microcystis blooms (Western Basin Lake Erie, Lake St. Clair, Green Bay, Hamilton Harbor) Anabanea blooms (Cleveland area & Western Basin of LE, Bay of Quinte) and Planktothrix blooms in Sandusky Bay
• Isolation of Great Lake HAB species from major bloom‐forming genera
• Controlled laboratory experiments investigating the competition between species under varying environmental conditions
• Further understating the interactive roles of light, nutrients, and temperature on toxin production and community composition
• This would involve investigating the molecular response of these phytoplankton to different environmental variables (light, nutrient, temperature, CO2) on a global level (comparative genomic/transcriptomic studies)
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Omics of Great Lakes CHAB species
• Very few Great Lake HAB genomes have been sequenced
• Understanding the global response of HAB species to environmental stressors
• Comparative genomics of toxic and non‐toxic strains
• Laboratory and field experiments aimed at elucidating the transcriptomic response of individual strains and the overall community to changes in the physical and chemical environment
• 13 strains of Great lakes CHAB species sequenced
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Autonomous real‐time toxin detection for Lake Erie
• EPA‐GLRI supplemental funds
• Environmental Sample Processor (ESP; Monterey Bay Aquarium Research Institute)
• Would be able to track blooms toxicity at a resolution that was previously unattainable with traditional sampling
• Will be referenced against physical, chemical and biological conditions
• Will be extremely valuable in the development of more accurate bloom forecasting models
Photos: Monterey Bay Aquarium Research Institute
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Thank you for your attention!
QUESTIONS?