Pond DiversityClassify these organisms

Classification Task• In the next series of slides, you will be shown

pictures of pond organisms that should look familiar.

• Use your key to classify each of these to:

• Domain

• Kingdom

• Phylum

• Class (for Arthropods and Vertebrates)

Mallard Duck

• Features:

• Feathers made of keratin.

• Jaws with keratin beak.

• Bony skeleton.

Diatoms

• Single-celled organisms with nuclei

• Silica shells

• Brown photosynthetic pigment.

Daphnia (Water Flea)• Multicellular

organism about 1mm long.

• Specialized organs, jointed appendages.

• Exoskeleton made of chitin, with calcium carbonate

• Feathery gills

Hydra• Soft-bodied, multicellular,

heterotrophic organism.

• Uses tentacles to catch prey.

• Radial symmetry.

• Specialized tissues, but no specialized organs.

Chlorella• Tiny single-celled

autotrophs with a nucleus.

• Cell walls made of cellulose.

• Forms symbiotic relationships with animals such as Hydra.

Euglena

• Single-celled, motile organism.

• Uses chloroplasts to synthesize food.

• Also eats bacteria.

Water Fern

• Multicellular autotroph.

• Contains vascular tissue.

• Reproduces using spores; does not make seeds.

Stentor

• Single-celled eukaryote.

• “Mouth” end covered with tiny cillia that sweep the water for food, such as algae, diatoms.

Rough-skinned Newt

• Bony skeleton, jaws.

• Skin is soft, no scales.

• Lays jelly-like eggs in ponds.

Dragonfly

• External skeleton made of chitin

• Segmented body

• Six legs

• Jointed appendages.

Spirogyra• Single-celled

autotrophs that form long, filamentous colonies.

• Use cholorophyl as a photsynthetic pigment and have cell walls made of cellulose.

Decomposing Bacteria

• Prokaryotic, single-celled organisms.

• Responsible for breaking organic compounds into inorganic compounds.

Oregon Ash• Multicellular,

terrestrial autotroph.

• Cell walls made of cellulose; uses chlorophyl for photosynthesis.

• Produces seeds inside of an ovary.

Amphipods (Scuds)• Multicellular, motile

heterotrophs.

• Complex organs.

• Jointed appendages.

• External skeleton reinforced with calcium carbonate.

Snail• Multicellular

heterotroph.

• Grazes on algae on the rocks.

• Hard shell, but no skeleton.

• True coelom, organs, complex nervous system.

Rushes• Multicellular

autotrophs with cell walls made of cellulose.

• Wind-pollinated.

• Flowering head produces many seeds inside of minute ovaries.

Great Blue Heron• Multicellular, motile

heterotroph.

• Bony skeleton.

• Jaws with a keratin beak.

• Feathers made of keratin.

Volvox

• Single-celled autotrophs with a nucleus.

• Cell wall made of cellulose.

• Individuals form spherical colonies.

Paramecium• Single-celled

organisms with a nucleus.

• Entire cell is covered with cillia for motility.

• Feed on bacteria, tiny algae, diatoms.

Backswimmer

• Multicellular heterotroph with an external skeleton made of chitin.

• Six legs.

• Aggressive predator.

Haematococcus• Single-celled, motile

autotroph with a nucleus.

• Cell wall made of cellulose, uses chlorophyl.

• Uses a flagella for locomotion.

Fingernail Clams

• Multicellular heterotroph.

• Pair of external shells, no skeleton.

• True organs, complex nervous system.

Predatory Leech• Multicellular

heterotroph.

• Segmented body, no skeleton.

• Closed circulatory system.

• True coeloem.

Garter Snake• Multicellular

heterotroph with a bony skeleton.

• Skin covered in flat scales made of keratin.

• Jaws with sharp fangs.

Cattails• Multicellular

autotrophs with cell walls made of cellulose.

• Small, nondescript flowers in sausage-shaped flowering head are wind-pollinated.

Raccoon

• Multicellular heterotroph with a bony skeleton and jaws with teeth.

• Internal fertilization, retains young inside the body.

Amoeba proteus

• Single-celled heterotroph with a nucleus.

• Asymmetrical. Moves and catches food by means of extensions called pseudopods.

Food Web

• Take the organisms you have classified, and organize them into a food web.

• Remember to put the producers at the bottom, then the first-level consumers, then the remaining consumers.