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Algae and Trout: Beauty and the Beast. Russ Rhodes An algal lover from Springfield, Missouri. Plan for the Evening . What are algae (size, color, clothes, shapes, mobility, contents)? What are their requirements? Where do you find algae? What is the relationship between algae and trout?

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algae and trout beauty and the beast

Algae and Trout:Beauty and the Beast

Russ Rhodes

An algal lover from

Springfield, Missouri

plan for the evening
Plan for the Evening
  • What are algae (size, color, clothes, shapes, mobility, contents)?
  • What are their requirements?
  • Where do you find algae?
  • What is the relationship between algae and trout?
  • What are some problems with algae?
  • Quiz
  • Open discussion
size range
Size Range
  • Microscopic
  • Macroscopic
color
Color
  • Green
  • Golden brown
  • Reddish brown
  • Brown
  • Red
  • Blue green
clothes external coverings
Clothes (External Coverings)
  • Cellulose
  • Protein
  • Calcium carbonate (chalk)
  • Glass
  • Naked
shapes
Shapes
  • Spherical
  • Spindle
  • Colonial
  • Filamentous (thread-like)
mobility
Mobility
  • Attached (no mobility)
  • Attached (mobility)
  • Swimming (“small oars”)
  • Floating (internal air sacs)
  • Creeping (“internal aids”
contents of algae
Contents of Algae
  • Starch
  • Protein
  • Oils
requirements for growth
Requirements for Growth
  • Sunlight
  • Carbon dioxide
  • Nitrogen (nitrates, ammonia, and gaseous nitrogen)
  • Phosphorus (phosphates and organic phosphates
  • Other nutrients (silicon, magnesium, etc.
where do you find algae
Where do you find Algae?
  • Ice and snow
  • Hot springs
  • Any body of water
  • Lakes
  • Oceans
  • Any kind of substrate, sand, mud, rock, other algae, trees,
  • animals
relationships of algae to their environment
Relationships of Algae to their Environment
  • Primary producer, oxygen source for world, food source for most oceanic and much of the freshwater animals
  • Habitat producer, site for colonization, refuge
what about trout
What about Trout?
  • Trout come in a variety of colors and types also
  • They have wide distribution, world wide
  • Trout consume a wide variety of animals
  • Especially scud
some types of trout
Brook trout

Brown trout

Rainbow trout

Lake trout

Cutthroat

Bull trout

Apache trout

Dolly varden

Gila trout

Golden trout

Splake

Speckled trout

Some Types of Trout
scud gammarus an amphipod
Scud (Gammarus, an amphipod)
  • Small invertebrate
  • Grazer
  • Habitat
  • Rocks, sand, algae
some genera of diatoms eaten by scud
Achnanthes

Amphora

Cocconeis

Cyclotella

Diatoma

Fragilaria

Gomphonema

Gryosigma

Melosira

Navicula

Nitzschia

Opephora

Rhoicosphenia

Synedra

Some Genera of Diatoms Eaten by Scud
whoa there what s this
Whoa there, what’s this?
  • Animal?
  • Plant?
  • Mineral?

The Blob!!!

problems with algae
Problems with Algae
  • Algal toxins
  • Hypoxia
  • Smell
  • Taste
  • Competition
and now to the blob
And now to the Blob
  • It was a plant!
  • The species is Didymosphenia geminata.
  • The plant type is a diatom.
  • World wide distribution
  • Similar problems in Washington, Canada, England, Arkansas
canada
Canada
  • Didymosphenia has been reported to grow to nuisance levels in a number of river systems around the province — especially throughout central Vancouver Island, where it was first reported in 1989. It has also been found in significant quantities in the Bulkley, South Thompson, Kettle, Columbia and Kootenay Rivers.
didymosphenia geminata
Didymosphenia geminata
  • Colonial diatom
  • Cells divide
  • Attachment as gelatinous stalks
  • Massive plant
  • Cells (200-300 microns long)
growth of didymosphenia
Growth of Didymosphenia
  • Small “seed” plants on rocks
  • Probable needs for massive growth
  • Bright sunlight
  • Slack water
  • Reduced phosphate
the quiz
The Quiz
  • The title: Algae and Trout
  • The subtitle: Beauty and the Beast
  • Which is which?

or

thanks for having me
Thanks for having me!
  • Many of the great photos were courtesy of Scott Branyan and Bob Britzke
  • The colorful diatom was courtesy of Mike Samworth, UK