Lab 11 & 12 - Algae/Diatoms/Invasive Ornamentals Flashcards
Green alga
Spirals of chloroplasts in a filimentous alga
Spirogyra
Green alga
Bilateral symmetry
Narrow connection of 2 halves with nucleus 2 chloroplasts
Desmidium
Water lettuce
Pistia
Water Hyacinth
Eichhornia crassipes
Diatom
Long and skinny; lines up on its side (filamentous)
Fragilaria
Diatom
Valve view: Football-shaped
Girdle view: Rectangular
Navicula
Diatom
Valve view: Looks like a half of a lemon
Girdle view: ovate
Cymbella
Diatom
Long and skinny with a pokey end
Synedra
Diatom
Valve view: Looks like a violin case
Girdle view: Looks like a cone with the pointed end cut off
Usually attached to another of its kind.
Gomphonema
Colonial diatom
Valve view: Small, round with pointed projections on the edge
Girdle view: ovate; very elongated
Pediastrum
Green alga
Elongated with two dark elongated chloroplasts
Closterium
Green alga
Short row of ovate cells with two flagellum curved inwards on the ends.
Scenedesmus
Green alga
Filamentous; short, rectangular cells lined up end-to-end with two star-like chloroplasts in each.
Zygnema
Yellow-Green Alga of Chrysophyta
Branched; elongated cells attached end-to-end; where branching, parent cell has a small, knobby extension where branching daughter cell attaches
Vaucheria
What is a Bacilloropyte?
Diatom
Name and family?
They move quickly with their whip-like flagellum.
Their red stigma, or eyespot, that allows them to sense sunlight.
Euglena
Euglenaphyta
Member of Euglenaphyta family
Has a red eyespot and whip-like flagellum.
Trachelomonas
What makes cyanophyta unique?
They can fix nitrogen using their heterocysts.
Yellow-green alga
Filamentous; unbranched
Has two disk-like chloroplasts; usually have an irregular edge
Tribonema
Blue-green alga (has heterocysts)
Filamentous
1 of 4 genera of cyanobacteria that produces a neurotoxin.
Anabeana
Blue-green alga
Named for oscilating movement; filaments in the colonies slide back and forth against each other to reorient to its light source.
Oscillatoria
Blue-green alga
Various shapes (cylindrical, rectangular, rod-like)
Not colonial, but does aggregate together in a slimy matrix.
Toxins cause skin irritation and gastrointestinal distress.
Anacystis
Blue-green alga
Colonial; very small cells (>5-um)
Usually spherical, but become irregularly shaped with age.
Produces a neurotoxin; can cause harmful algal blooms
Microcystis
