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World Oceans
Test 3
35
Geology
Undergraduate 3
11/21/2011

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Term
Physical Controls
Definition
temperature, water depth, density, water movement, turbidity, bottom (substrate), light
Term
Chemical controls
Definition
salinity, oxygen (supports animals), carbon dioxide (supports plants), nutrients (stimulates plant growth in ocean)
Term
Where does maximum light penetration occur?
Definition
shallow water
Term
Biological controls
Definition
food
space
reproduction
Term
Plankton
Definition
floaters; no control of movement (jellyfish)
Term
Nekton
Definition
swimmers; controls movement (squid, fish, whales, turtles)
Term
Benthos
Definition
bottom dwellers
Term
Two categories of benthos:
Definition
sessile: can't move - attached to bottom
motile: can move
Term
Habitat categories:
Definition
Planktic and Nektic: neritic, oceanic, pelagic
Benthic: infaunal, epifaunal
Term
Neritic
Definition
over continental shelf (shallow waters)
Term
Oceanic
Definition
stay in open ocean
Term
Pelagic
Definition
move back and forth between ocean and continental shelf
Term
Infaunal
Definition
within the sediment
Term
Epifaunal
Definition
on the surface
Term
Two categories of feeding types:
Definition
autotrophs: photosynthesis, chemosynthesis (self feeder - plamts/organisms)
heterotrophs: carnivores, herbivores, omnivores
Term
3 classes of heterotrophs
Definition
filter feeds (sponges)
"sediment eater" (deposit eater - sea cucumbers)
catcher/capturer/swallowers (snail, starfish, coral)
Term
What is the best way to realistically depict feeding relationships?
Definition
Food webs
Term
Classifications form largest to smallest
Definition
Kingdom, phylum, class, order, family, genus, species
Term
Kingdom Protoctista
Definition
(one celled eukaryotic (have nucleus)): Phylum Chrysophyta, Phylum Protozoa
Term
Chrysophyta
Definition
diatoms (silica), coccolithophores (calcareous), dinoflagellates (organic test)
Term
Protozoa
Definition
order foraminifera (calcareous) & radiolaria (silica test)
Term
Stromatolites
Definition
during the night they grow laterally, and during the day they use photosynthesis to grow vertically. (MATS)
Term
Kingdom Monera
Definition
prokaryotic (no nucleus)
- bacteria
- cynobacteria
Term
Kingdom Fungi
Definition
marine fungi and yeasts = fouling
(reproduce using spores)
Term
Kingdom Plantae
Definition
Algae (multi-celled) - classified by color
- red: Rhodophyta
- brown: Phaeophyta - kelp, sargassum
- green: Chlorophyta
- grasses: turtle and salt marsh grass
- trees: mangroves
Term
Kingdom Animalia...what are the Phylums?
Definition
- Porifera
- Cnidaria
- worm phyla
- phylum bryozoa
- brachiopoda
- mollusca
- anthropoda
- echinodermata
- chordata
Term
Porifera
Definition
pore bearing
totipotent (can take on any function)
the hole at the top is for water to exit (osculum)
Term
Cnideria
Definition
Nematocysts (stinging cells)
medusa & polyp body forms
- scyphozoa: true jellyfish (mostly medusa)
- hydrozoa:fire coral & man o' war (oldest-mostly polyp)
- cubozoa: sea wasps; 4 groups of tentacles; killers (entire life as medusa
- anthozoa: black corals, sea fans, sea anemones (only polyp)
Term
Worm phyla
Definition
- annelida: segmented worms (bristle worms, feather dusters, xmas tree worms
- phoronida: horseshoe tube worms (related to brachiopods and bryozoans)
Term
Bryozoa
Definition
moss animals: small, colonial
Term
Brachiopoda
Definition
lamp shells; bilateral symmetry; solitary; bivalved
Term
Molluska
Definition
Gastropoda: snails, herbivore, coiling body, 2ndary carnivore
Bivalvia: some swim (scallops), some attach (oysters, mussels)
Cephlapoda: octopus, squid, nautilus (swimmers)
Polyplacophora: 8 shells
Scaphopoda: shell straight up w/foot (lives under sand)
Aplacophora: most primitive...no shell
Term
Arthropoda
Definition
paired, jointed appendages, exoskeleton: krill, barnacles, shrimp, crabs, lobsters, horseshoe crabs
Term
Echinodermata
Definition
radial symmetry, internal skeleton, water vascular system
- Crinoids: sea lilies
- Asteroids: star fish
- Ophiuroids: brittle stars
- echinoids: sea urchins and sand dollars
- holothurians: sea cucumbers
Term
Chordata
Definition
(gill slits)
- tunicates (larva like tadpole): sea squirts
- vertebrates: agnatha (jawless fish), chondrichthyes (jawed: sharks, rays, skates), osteichthyes (bony fish), amphibia, reptilia, aves, mammalia
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