ocean productivity. outline the microbial revolution major types of phytoplankton what is primary...
TRANSCRIPT
![Page 1: Ocean Productivity. OUTLINE The Microbial Revolution Major Types of Phytoplankton What is Primary Production From Studying Cell Counts to Satellites Controls](https://reader036.vdocument.in/reader036/viewer/2022062714/56649d055503460f949d9489/html5/thumbnails/1.jpg)
Ocean Productivity
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OUTLINE
• The Microbial Revolution
• Major Types of Phytoplankton
• What is Primary Production
• From Studying Cell Counts to Satellites
• Controls of Primary Production
• Seasonal Cycle of Primary Production
• HNLC Regions?
• Harmful Algal Blooms (HABs)
![Page 3: Ocean Productivity. OUTLINE The Microbial Revolution Major Types of Phytoplankton What is Primary Production From Studying Cell Counts to Satellites Controls](https://reader036.vdocument.in/reader036/viewer/2022062714/56649d055503460f949d9489/html5/thumbnails/3.jpg)
• The Microbial Revolution– 1970s Discovery of tiny photosynthetic microbes - Gyres
• Cyanobacteria (Blue Green Algae) - e.g. Prochlorococcus
• Source of Incredible Marine Natural Products -
• Make up ½ of phytoplankton in Oceans!
– A Microbial Revolution• Annually new discoveries of
Microbes Alter the way We
– Think about Ocean/systems
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OUTLINE
• The Microbial Revolution
• Major Types of Phytoplankton
• What is Primary Production
• From Studying Cell Counts to Satellites
• Controls of Primary Production
• Seasonal Cycle of Primary Production
• HNLC Regions?
• Harmful Algal Blooms (HABs)
![Page 5: Ocean Productivity. OUTLINE The Microbial Revolution Major Types of Phytoplankton What is Primary Production From Studying Cell Counts to Satellites Controls](https://reader036.vdocument.in/reader036/viewer/2022062714/56649d055503460f949d9489/html5/thumbnails/5.jpg)
• Major Types of Plankton– Challenge Question - What are they?
• Pico phytoplankton ≤ 2 uM - Cyanobacteria (prochlorococcus)
• Nano phytoplankton ≤ 20 uM – Small Diatoms
• Micro phytoplankton ≤ 200 uM - Large Diatoms, dinoflagellates
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•Major Types of Plankton•Absorb UV light at different Wavelengths
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OUTLINE
• The Microbial Revolution
• Major Types of Phytoplankton
• What is Primary Production
• From Studying Cell Counts to Satellites
• Controls of Primary Production
• Seasonal Cycle of Primary Production
• HNLC Regions?
• Harmful Algal Blooms (HABs)
![Page 8: Ocean Productivity. OUTLINE The Microbial Revolution Major Types of Phytoplankton What is Primary Production From Studying Cell Counts to Satellites Controls](https://reader036.vdocument.in/reader036/viewer/2022062714/56649d055503460f949d9489/html5/thumbnails/8.jpg)
– What is Primary Production?• The rate of production of Organic matter by phytoplankton or
photo autotrophs
• What are some examples of algae producers besides phytoplankton (aka macro algae)?
– Macroalgae (Kelp)
– Zooxanthellae (Coral)
– True Marine Plants
» Mangroves
» Seagrass
» Marsh Plants
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• Primary Production (aka - a Bloom)– Light Reactions (Sunlight) -Photosynthesis– Dark Reactions (convert E from light w/ CO2 sugars)
– CO2 + H2O + light C6H12O + H2O + O2
– 106 CO2 + 122 H2O + 16 HNO3 + 1 H3PO4
106 C6H12O + H2O 16 NH3 + 1 H3PO4 + 138 O2
– THE REVERSE (grazing) RESPIRATION• Zooplakton, Fish, Whales, Humans
• Eat e.g.Sugar spit out CO2
(Sugar)
(Sugar/Carbs)
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Fig. 13.8
Primary Production
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OUTLINE
• The Microbial Revolution
• Major Types of Phytoplankton
• What is Primary Production
• From Studying Cell Counts to Satellites
• Controls of Primary Production
• Seasonal Cycle of Primary Production
• HNLC Regions?
• Harmful Algal Blooms (HABs)
![Page 12: Ocean Productivity. OUTLINE The Microbial Revolution Major Types of Phytoplankton What is Primary Production From Studying Cell Counts to Satellites Controls](https://reader036.vdocument.in/reader036/viewer/2022062714/56649d055503460f949d9489/html5/thumbnails/12.jpg)
• From Studying Cell Counts to Satellites– Many ways exist to estimate primary production
• Here are several important approaches
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From Studying Cell Counts to Satellites
Light and Dark Bottle Method
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Others look at elemental equivalents in Sea waterremember Liebig’s Law of Minimum?
• Challenge Question– What is the Redfield Ratio?
• The optimum ratio of Macronutrients for Phytoplankton to bloom:
– What is the ratio? Carbon Nitrogen Phosphorous
– C106 N16 P1
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Fig. 13.3
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From Studying Cell Counts
to Satellites
The C14 radioactive Tracer
Method
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Artificial Fluorescence
From Studying Cell Counts to Satellites
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Artificial Fluorescence – compounds give off the color they are NOT absorbing
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Fig. 13.6
Natural
Fluorescence
From Space
Satellites
From Studying Cell Counts
to Satellites
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From Studying Cell Counts to Satellites
• Confirming Your Knowledge– What are some Major ways in which Oceanographers
estimate Phytoplankton 1˚production?• Light & Dark bottle method
• Look for removal of Dissolved elements (det. Growth rates)
• Carbon -14 (14C) radioactive tracer to bottle/ incubate in Sun, CO2 fixed = Rate of Photosyn.)
• Artificial Fluorescence
• Sun Stimulated Fluorescence of Chlorophyll (Satellite imagery)
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OUTLINE
• The Microbial Revolution
• Major Types of Phytoplankton
• What is Primary Production
• From Studying Cell Counts to Satellites
• Controls of Primary Production
• Seasonal Cycle of Primary Production
• HNLC Regions?
• Harmful Algal Blooms (HABs)
![Page 22: Ocean Productivity. OUTLINE The Microbial Revolution Major Types of Phytoplankton What is Primary Production From Studying Cell Counts to Satellites Controls](https://reader036.vdocument.in/reader036/viewer/2022062714/56649d055503460f949d9489/html5/thumbnails/22.jpg)
• Controls of Primary Production– Photosynthetic Light Limitation
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• Controls of Primary Production– Dissolved Inorganic Nutrients
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• Controls of Primary Production– Marine Bacteria and Nutrients
• Reminerilization (recycling)
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• Controls of Primary Production– Zoo plankton Grazing – keeps food web under control
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Fig. 13.13
• Controls of Primary Production– Vertical Mixing
c
c
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• Confirming Your Knowledge Question(s)?– What are some of the Major Control Mechanisms of
Primary Production?
• The Photosynthetic Light Limitation
• Amt. of Dissolved Inorganic Nutrients (namely?)
• Marine bacteria and Nutrient Recycling
• Zooplankton Grazing
• Vertical Mixing Issues
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OUTLINE
• The Microbial Revolution
• Major Types of Phytoplankton
• What is Primary Production
• From Studying Cell Counts to Satellites
• Controls of Primary Production
• Seasonal Cycle of Primary Production
• HNLC Regions?
• Harmful Algal Blooms (HABs)
![Page 29: Ocean Productivity. OUTLINE The Microbial Revolution Major Types of Phytoplankton What is Primary Production From Studying Cell Counts to Satellites Controls](https://reader036.vdocument.in/reader036/viewer/2022062714/56649d055503460f949d9489/html5/thumbnails/29.jpg)
• Seasonal Cycle of Primary Production – (different @ different places. . .
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Fig. 13.14.a
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OUTLINE
• The Microbial Revolution
• Major Types of Phytoplankton
• What is Primary Production
• From Studying Cell Counts to Satellites
• Controls of Primary Production
• Seasonal Cycle of Primary Production
• HNLC Regions?
• Harmful Algal Blooms (HABs)
![Page 32: Ocean Productivity. OUTLINE The Microbial Revolution Major Types of Phytoplankton What is Primary Production From Studying Cell Counts to Satellites Controls](https://reader036.vdocument.in/reader036/viewer/2022062714/56649d055503460f949d9489/html5/thumbnails/32.jpg)
• HNLC Regions– Challenge Question – What are They & where do they occur?
• High Nutrients areas (e.g. Nitrogen “N” & Phosphorous “P”) – However Lower then Expected Chlorophyll is produced there. . .(HNLC)
• What key trace elements could be lacking?– Iron (Fe), Great Transporter of Oxygen (key Element in Marine life)
– Silica (SiO2) Diatom Shells . . .
http://www.es.ucsc.edu/~kbruland/Research/kwbRes.html
Wooden Sunken ShipWhere is the marine Life?
Metal Sunken Ship~ teaming with Life
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• HNLC Regions• Challenge Question – What are they & Where do they occur?
– Areas of low Iron (Fe) or Silica (Si) Input:
– (either no Aeolian or no Sediment input or both)
» e.g. Santa Cruz vs Big Sur
Santa Cruz, CA
Big Sur, CA
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• HNLC Regions• Where do they occur?
– Areas of low Iron (Fe) or Silica (Si) Input
» e.g. Santa Cruz vs Big Sur
SeaWIFS image showing surface chlorophyll concentrationsin squirts and eddies off the central California coast.
(Provided by Raphael Kudela)Bathymetric Map of Central CA Coast.(Provided by USGS)
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• HNLC regions– Well –Who Cares? What does it matter?– Fe Enrichment Experiments? (Fertilize the Oceans>?)
• John Martin ( the Iron Man) a reality?
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• YES - GLOBAL HNLC regions– Southern Ocean – Lots of NO3
TO DATE – 9 Iron Enrichment Experiments Done:(1993-2003)
A: IronEx I B: IronEx II D: SOIREE E: EisenEx G: SEEDS H: SOFeX
J: Planktos K: SERIES
SOURCE: http://www.bbm.me.uk/FeFert/expSummary.htm
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• HNLC Iron Enrichment– Still under investigation. . .– Stay tuned. . ..– Results
• Inconclusive– Need to factor in what
Other element?
SOURCE: http://www.bbm.me.uk/FeFert/expSummary.htm
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OUTLINE
• The Microbial Revolution
• Major Types of Phytoplankton
• What is Primary Production
• From Studying Cell Counts to Satellites
• Controls of Primary Production
• Seasonal Cycle of Primary Production
• HNLC Regions?
• Harmful Algal Blooms (HABs)
![Page 39: Ocean Productivity. OUTLINE The Microbial Revolution Major Types of Phytoplankton What is Primary Production From Studying Cell Counts to Satellites Controls](https://reader036.vdocument.in/reader036/viewer/2022062714/56649d055503460f949d9489/html5/thumbnails/39.jpg)
• Harmful Algal Blooms (HABS) aka red tides. . . – Challenge Questions
• What are they & Where/How do they occur?– A bloom of phytoplankton
» that is Harmful to the Environment
– Can occur anywhere, esp. in areas of enhanced Nutrients
» i.e. eutrophication zones. . What is that?
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• Limnology/ Oceanography– Eutrophic vs Oligotrophic Environments
• Nutrient Rich Nutrient Poor
Clear Lake?, CALOTS of Nutrients/ RunoffPea Soup Green
Lake Tahoe, CALittle Nutrients/ Runoff/ But Increasing. . .
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• Harmful Algal Blooms (HABS) aka red tides. . . • Where are some probable locations of HABS in the US & Why?
» Mississippi
» Washington Coast
» Monterey Bay
•Hypoxic/Anoxic Regions
if have Massive Blooms Oxygen Depletion by Zooplankton
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•HABS – How are they Harmful? the Gulf of Mexico - Lots of Nutrients from Where?
1) Hypoxic (low O2) and Anoxic Zones (No O2) Fish Kills
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HABS – Steadily Increasing since the 1970s – why?
Many poisonings (Toxin ingestion) now associated with HABS. . .
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• HABS – How are they Harmful?• 2) Planktonic production of Toxins (poisons)
– i.e. (secondary metabolites), e.g. Marine Natural Products Chemistry
• Toxins Ingested (as poisons) biomagnify up Food Chain– Zooplankton / mussel / anchovie fish bird
– Two FAMOUS Cases -
Dinoflagelate –Paralytic Shellfish poisoning (PSP)Alexandrium tamarense
Diatom –Amnesic Shellfish Poisoning (ASP)Pseudonitzschia australis.
Saxitoxin Domoic acid
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• HABS – How are they Harmful?– Not in the Textbooks - Yet
• 3) Planktonic secreted (foam) Marine Natural Products– As Topical agents - Alter organisms mobility
» Surfactants (soapy compounds)
» compromise viability of Marine Bird feathers
• See Recent Publication– http://blogs.discovermagazine.com/notrocketscience/2009/02/23/red-
tides-kill-seabirds-with-soapy-foam/
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HABS
• Confirming your Knowledge– What are 3 major ways in which HABS can be harmful?
• 1) Hypoxic/anoxic zones– e.g Mississippi Nutrient Run off massive blooms (O2 used up from Zooplankton)
• Secondary Metabolite production (Marine Natural Products)
– 2) Toxins produced/ingested – Biomagnified up Food Chain
» i.e. Plankton mussels fish birds humans
» e.g. Domoic Acid (ASP), Saxitoxin (DSP)
– 3) Topical agents - Alter organisms mobility
» Surfactant production (soapy compounds) compromises feathers
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END
OCEAN PRODUCTIVTY A whole New World of DISOCOVERY
Last Lecture Wednesday – Turn In all Assignments Wed. – LAST DAY – FRIDAY
HANG IN THERE – ALMOST DONE
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Page 267
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Fig. 13.1
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Fig. 13.5
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Figure 13a
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TABLES
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Tab. 13.1
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Tab. 13.2
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Tab. 13.3
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Tab. 13.4
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Tab. 13.5