AQUATIC ECOSYSTEMS

- Marine ecosystems- Continental water ecosystems:

- wetlands- rivers

EcosystemsUNIT

5

Natural Science 2. Secondary Education

A marine ecosystemUNIDAD

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5UNIDAD

5UNIT

5

Natural Science 2. Secondary Education

Sperm whale

Tuna

SquidBerycidae

Characins

Abyssaloctopuses Jellyfish

Eurypharynx pelecanoides

Linophryne

SaccopharynxConger eel

Abyssal holothurium

Seaturtle

Sharks

Common dolphinsWhaleSwordfish

Octopus

Oceanic zoneNeritic zone

Pelagic zone

Bathyalzone

Abyssalzone

200 m

2000 m

UNIT

5

Natural Science 2. Secondary Education

Wetlands

• A wetland is an area of land that is saturated with water. Wetlands are found in coastal areas.

• The water found in wetlands can be freshwater or a mixture of freshwater and saltwater from ocean tides (brackish water).

• Wetlands are very rich in biodiversity, and home to great numbers of endemic species.

• Many migratory birds use wetlands as a temporary habitat.

Wetlands

Grey heron

Purpleswamphen

Grey herons

Flamingos

SpoonbillWarbler

Water scorpion

Water snake

Iberian ribbed newt

Mediterranean tree frog

Teal

ShovellerSouthwestern water vole

Crayfish

Eel

Stilt

Diving beetle

Barbel

UNIT

5

Natural Science 2. Secondary Education

Wetlands

UNIT

5

Natural Science 2. Secondary Education

Rivers• Rivers are ecosystems that are defined by the movement of water. There are two different river zones:

• The upstream portion of the river, where there is a turbulent flow of water. Animals with more hydrodynamic shapes, which are therefore better able to swim, inhabit this area.

• The midstream and downstream area of the river, where animals are adapted to this zone’s characteristic warmer and slower moving water.

Otters are very hydrodynamic, an adaptation to fast river currents.

Perches are adapted to the slow moving water of the midstream and downstream zones.

Biodiversity in rivers

Otter

Kingfisher

Dragonfly

Water snake

Diving beetle

Trout

White-throated dipper

Freshwater mussel

Commonfrog

Iberian newt

Caddisfly

Crayfish

UNIT

5

Natural Science 2. Secondary Education

Rivers