Learning path 03

Marine Life & Habitats

Start with habitat and ecological role, then use species guides to understand adaptation, pressure, and conservation status.

Last updated 2026-09-28 · Reviewed against listed sources
Habitat first, species second

A species is easier to understand when its food, shelter, temperature range, predators, and seasonal movement are visible around it.

Build an ecological picture

01

Map the habitat

Compare coral reefs, kelp forests, seagrass meadows, open ocean, and the deep sea.

02

Find the key species

Look for producers, predators, grazers, engineers, and species that move nutrients.

03

Trace the pressure

Separate direct threats from changes to temperature, prey, chemistry, and connectivity.

04

Check the status

Use conservation assessments as a starting point, not a substitute for local data.

Field guide picks

Ecosystem

Coral reefs

Structure, symbiosis, bleaching, and the limits of recovery.

Open resource →Ecosystem

Kelp forests

A productive habitat shaped by herbivory, temperature, and predators.

Open resource →Species

Blue whale

A filter-feeding giant whose distribution follows prey and ocean conditions.

Open resource →

Ocean field notebook / paths

Field plan: Marine Life & Habitats

Start with habitat and ecological role, then use species guides to understand adaptation, pressure, and conservation status.

Station 01

System boundary

Keep organism, habitat, water mass and human pressure at distinct scales, then show explicitly how the proposed mechanism links them. Relate that field focus to “Build an ecological picture” before moving to “Map the habitat.”

Station 02

Measurements to log

Pair a second measurement of the same process with a time series with an explicit baseline. Record depth, location, date, units and sampling effort so a change in conditions is not mistaken for a change in the ocean.

Station 03

Change signal

Compare “Map the habitat” with “Find the key species.” Decide whether the pattern represents exposure, response or recovery, and state the observation period needed to tell them apart.

Open the pre-dive checklist
  • Which variable can be observed directly?
  • Which mechanism needs a second instrument or comparison site?
  • What result from the page sources and linked institutional records would change the planned conclusion?