3 categories of marine ecosystem

An area which freshwater from a river mixes with saltwater from the ocean

Near input from the river

Middle of the estuary

At the ocean

Importance of estuary for the living things

A unit for salinity

Meaning of ppt

Importance of estuaries for water

Estuary plants

Estuary animals

A low area that is subject to regular, but gentle, tides

Dominated by grass

Coastal wetlands located in tropical and subtropical zones

Tangled roots that reach above the water line, form an important habitat for many animals

Also called rocky intertidal zone

Many places to live in this habitat means high biodiversity

The beach

Not much habitat, sand dries out at low tides

Narrow islands made of sand that provide a buffer for the mainland from the sea

Structures in the ocean that are built by animals are called

Coral reefs requires 2 things

Coral reefs can be found at

An algae that has a symbiotic relationship with corals

2 types of corals

When temp goes above normal

Natural cause of coral bleaching

Manmade cause of coral bleaching

The deep level of Mariana trench

Full sunlight, phytoplankton, zooplankton, nekton

The twilight zone

Cold, dark, high pressure

Specialized weird organisms live here

Filter feeders, scavenger, decomposers

Organic particles that settle down from above

Cracks in the earth that allow hot gases escape.

Certain bacteria can make food in these condition