Unit 4.1-4.2 Aice Marine

Define plankton

Diverse collection of generally microscopic organisms that have limited motility

Why are phytoplankton producers?

They absorb nutrients from their environment and obtain their nutrition by photosynthesis

Examples of phytoplankton (1)

Microscopic algae (such as diatoms and dinoflagellates)

Zooplankton are producers or consumers?

Consumers

Examples of zooplankton (3)

Larvae, copepods, and jellyfish

State the main features of a typical adult echinoderm (2)

Pentaradial symmetry and tube feet

State the main features of a typical adult crustacean (2)

Jointed legs and two pairs of antennae

Ecological and Economic importance of an echinoderm

Ecological: Supports kelp forests and sand shores

Economic: Scientific research

Ecological and Economic importance of crustaceans

Ecological: Recycles Nutrients

Economic: Food source

State the main internal and external features of a typical adult bony fish (7)

• Bony skeleton

• Operculum

• Gills

• Swim bladder

• Scales

• Externally visible lateral line

• Fins

State the main features of a typical macro-alga (4)

• Holdfast

• Stipe

• Gas bladders

• Blades

Ecological and Economic Importance of a macroalga

Ecological: Habitat for animals

Economic: Cosmetics

Mark-release-recapture method is used for?

…estimating population size of named species

Define Keystone Species

Organisms that affect biodiversity

Examples of Keystone Species (3)

Starfish, Antarctic Krill, Blue Shark

Ecological and Economic Importance of Marine plants

Ecological: Supports health of coastal ecosystems

Economic: Protects against flooding

Examples of Chordates (2)

Bony Fish and Cartilaginous Fish

Ecological and Economic Importance of Cartilaginous Fish

Ecological: Top predator

Economic: Fishing

Ecological and Economic Importance of Bony Fish

Ecological: Release nutrients by producers

Economic: Food source