What is marine?Marine biology is the scientific study of the

organisms that live in the seaDifferent disciplines involved overlap

Geological oceanography- study sea floorChemical oceanography- ocean chemistryPhysical oceanography- waves, tides, currents

Why study marine bio?Life on earth probably evolved from the seaForsee problems organisms can pose

Cause diseaseAttacks on us/organisms we depend onErosion of structures & damages

Understand planet betterProduce much oxygen we useRegulates climateBuild, shape and protect shorelines

Predict effects of human activities on sea life

Source of revenue

Food

Medicine

Raw materials

Recreation

Tourism

$20 Trillion/year

History of MarineShipping voyages to map coastlinesTake a naturalist to collect and study life

formsCharles Darwin

The Challenger ExpeditionFirst voyage (mid 19th century) specifically to

study oceans

Gathered new specimensTook 19 years to pub results, filled 50 thick vol.Organisms dead

Marine labs on shoresObserve live organisms

New TechnologyWWII developed sonar- sound navigation ranging

Response to sub warfareBased on detection of underwater echoes

Scuba: Self contained underwater breathing apparatusJacques Cousteau created apparatus to breathe

compressed airFor 1st time observe organisms in natural

environment

Marine TodayROV’s-remotely operated vehicles we control

from surfaceCollect specimens

Remote sensing- study earth and ocean life from afarBouys- move with currents, collect dataSatellites picking up signals, collecting dataAnimal tagging- migration patterns