GEOG 2500 Lecture Notes - Lecture 1: Foraminifera, Osmoregulation, Bioluminescence
How is life classified
5 (or 6) kingdoms
Fungi, plants, protists, monera, animals
Habitat
Pelagic vs. benthic
Pelagic: live in water
- Plankton: “passive floaters”
- Phytoplankton: plant like organisms
- Diatom: shells made of silica
- Form a chain
- “Shells” of glass
- Coccolithophores: cell walls pf calcium carbonate
- “Shells” of chalk
- Dinoflagellates: can be toxic
- Zooplankton: animal like organisms
- Copepods: flea-sized crustaceans
- Foraminifera: protists
- Used in climate research
- Meroplankton: part timers
- Usually java their
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- Nekton: “active swimmers”
Benthic: on or in seafloor
1. Pressure
a. Each 100m in depth
b. Pressure increases by 10 atmospheres
2. Salinity
a. Salt concentration
b. Diffusion (type of osmosis): movement of molecules from high concentration to
low concentration
c. Osmosis: diffusion of water molecules
i. Moves from fresh water (high concentration of water_ toward salt water
(lower water concentration)
ii. Osmoregulation in fish
1. FW fish tend to gain water
2. Marine fish (not sharks or rays) tend to lose water