slide1 n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Dynamics of cyanobacterial bloom formation PowerPoint Presentation
Download Presentation
Dynamics of cyanobacterial bloom formation

Loading in 2 Seconds...

play fullscreen
1 / 44

Dynamics of cyanobacterial bloom formation - PowerPoint PPT Presentation


  • 472 Views
  • Uploaded on

Dynamics of cyanobacterial bloom formation. Justin Chaffin Ph.D. F.T. Stone Laboratory Ohio Sea Grant The Ohio State University chaffin.46@osu.edu. HABs 101 Tom Ridge Environmental Center , August 14, 2013. There are hundreds of species of algae in Lake Erie. Lake Erie food web.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Dynamics of cyanobacterial bloom formation' - carl


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
slide1

Dynamics of cyanobacterial bloom formation

Justin Chaffin Ph.D.

F.T. Stone Laboratory

Ohio Sea Grant

The Ohio State University

chaffin.46@osu.edu

HABs 101

Tom Ridge Environmental Center, August 14, 2013

lake erie food web
Lake Erie food web

Bottom organisms

major phytoplankton groups in lake erie
Major phytoplankton groups in Lake Erie
  • Diatoms
  • Glass cell wall
  • High lipid content
  • Nutritional for zooplankton
  • Spring blooms of diatoms in Lake Erie

http://cfb.unh.edu/

lake erie diatom bloom during winter
Lake Erie diatom bloom during winter

Twiss et al., 2012 J Great Lakes Res.

major phytoplankton groups in lake erie1
Major phytoplankton groups in Lake Erie
  • Green Algae
  • Closely related to higher plants
  • Account for 50% of species in Lake Erie
  • Rarely bloom
  • Less lipid, but nutritious

http://cfb.unh.edu/

slide7

Cladophora

Cladophora epiphytes

Cladophora chloroplast

Cladophora chloroplast

major phytoplankton groups in lake erie2
Major phytoplankton groups in Lake Erie
  • Cyanobacteria
  • “Blue-green algae”
  • Some contain gas vacuoles
  • Some produce toxins
  • Some fix nitrogen
  • Low lipid, low nutrition
  • Just a few are “Harmful”
    • Synechococcus~ 50% of oxygen

http://cfb.unh.edu/

other algae of lake erie
Other algae of Lake Erie

http://cfb.unh.edu/phycokey/phycokey.htm

lake erie produces the most fish of all the great lakes because it has the most algae
Lake Erie produces the most fish of all the Great Lakes because it has the most algae
  • Highest nutrient concentrations
  • Warmest water temperature
too much of the wrong kind of algae is harmful
Too much of the wrong kind of algae is harmful
  • “Bloom” is an excessive amount of algae
  • “Harmful algae bloom” is a bloom of potentially harmful algae.

Photo Credit: Drs Jeff Reutter and Doug Kane

what is a harmful algal bloom
What is a Harmful Algal Bloom?
  • Harmful =
    • Has the potential to produce toxins.
    • Harmful impacts on ecosystems
  • Algal =
    • Blue-green algae (cyanobacteria)
    • Red tide (dinoflagellates)
  • Bloom =
    • Biomass that far exceed normal

geology.com

Hungeree.com

are there non harmful algal blooms
Are there non-harmful algal blooms?
  • Cladophora
  • Diatoms
  • These algae can reach high biomasses but do not produce toxins harmful to humans or animals
    • But can have other negative impacts

Turtles.org

not an algal bloom
Not an algal bloom:
  • Duckweed
  • Lily pads
  • Submerged plants
  • Lawn clippings
algal blooms are a global problem
Algal blooms are a global problem
  • Due to humans increasing nutrient loading

Lake Erie, USA

Lake Nieuwe Meer, Netherlands

Lake Taihu, China

problems associated algal blooms
Problems associated algal blooms
  • “Blooms” of cyanobacteria
    • Produce toxins
    • Low diversity of phytoplankton
  • Taste and smell problems
  • Low dissolved oxygen
  • Property value decreases
  • Negative economic impacts

whoi.edu, W. Carmichael

geolocation.ws

high phosphorus concentrations are required for eutrophication
High phosphorus concentrations are required for eutrophication

+ Carbon

+ Nitrogen

+ Phosphorus

Dense algae bloom

+ Carbon

+ Nitrogen

No Phosphorus added

No algae bloom

Schindler 1974. Science

bloom requirements
Bloom requirements
  • Water temperatures > 15 °C
    • July, August, September in Lake Erie
  • High nutrient concentrations
    • Run off associated with rain storms
    • Phosphorus typically is the “limiting nutrient”
    • Nitrogen is important in cyanotoxin production
microcystis is the major blue green algae in lake erie
Microcystis is the major blue-green algae in Lake Erie

http://cfb.unh.edu/phycokey/phycokey.htm

microcystis
Microcystis

http://cfb.unh.edu/phycokey/phycokey.htm

microcystis1
Microcystis

http://cfb.unh.edu/phycokey/phycokey.htm

anabaena common late summer
Anabaena common late summer

http://cfb.unh.edu/phycokey/phycokey.htm

non blooming cyanobacteria in lake erie
Non-blooming Cyanobacteria in Lake Erie

Merismopedia

Chroococcus

http://cfb.unh.edu/phycokey/phycokey.htm

lake erie 20111
Lake Erie 2011

June 1

July 19

July 31

August 11

September 3

October 9

Michalak et al. 2013 PNAS

variation in microcystis bloom intensity of lake erie
Variation in Microcystis bloom intensity of Lake Erie

Bridgeman et al., 2013. Journal of Great Lakes Research

most p loading occurs during storms
Most P loading occurs during storms

Michalak et al. 2013. Proc Nat AcadSci

calm summer increased residence time of maumee bay
Calm summer increased residence time of Maumee Bay
  • Spring storm water sat in Maumee Bay during summer and provide the perfect incubator for cyanobacteria.

Michalak et al. 2013. Proc Nat AcadSci

calm water favors microcystis
Calm water favors Microcystis
  • Microcystis wins in calm water and deeper water
  • Diatoms win in mixed water

Mixed

Calm

Clear

Turbid

Huisman et al. 2004

2011 record breaking bloom explained1
2011 Record-breaking bloom explained
  • Many large spring storms
  • High P loading
    • Fertilized growth
  • Very calm early summer
    • Microcystis floated and thrived
    • Diatoms sank and died
planktothrix in sandusky bay
Planktothrixin Sandusky Bay

http://cfb.unh.edu/phycokey/phycokey.htm

lyngbya
Lyngbya

http://cfb.unh.edu/phycokey/phycokey.htm