ECOSYSTEMSTERRESTRIAL AND AQUATIC

Terrestrial Ecosystems

Organisms can live on land, surrounded by air. The distribution depends mainly on abiotic factors related to climate.

Abiotic factors:1. Temperature: vries with altitude,

latitude and proximity to sea.2. Light.3. Humidity: quantity of water in air.

Climate zones

1. Frigid zone: cold zones from the Poles to the polacr circles.

2. Temperate zones: between the polar circles and the Tropics.

3. Torrid zone: between the Tropic of Cancer and the Tropic of Capricorn.

Frigid zone

Tundra: Permanently

frozen soil

Mosses, lichensReindeer, white

foxes, lemmings

Taiga: Long, dark, cold

winter Short humid

summers

Pine and fir trees Bear, lynxes,

wolves

Mosses and lichen

Fir tree and lemmings

Temperate zone

Deciduous forest Cold and warm

seasons, abundant rainfall

Oak, beech, chestnuts trees

Bears, foxes, squirrels, mountain lions

Mediterranean forest:

Warm dry summers, low rainfall

Holm oaks, cork oaks

Rabbits, reptiles, wild boars, birds

Oak and mountain lion

Torrid zone

Savannah (grassland)

Dry, wet seasons Grass, schrubs zebra, giraffes,

gazelles, lions Desert: High daytime

temp., low night time temp.

Cacti, camels, lizards

Rainforest: High rainfall and

high temp. All year around.

Different layers of flora and fauna

Small to very large trees, snakes, iguanas, bats, monkeys, insects

Savannah and rainforest

Man-made ecosystems

Cultivated land Parks and gardens

AQUATIC ECOSYSTEMS

Creatures can live surrounded by water. Abiotic factors: Light: it decreases as the water gets deeper. Temperature: it varies with distance from

the coast and the depth of water Pressure: increases as the water gets

deeper Salinity: it varies in aquatic ecosystems Oxygen: A E have less oxygen and fewer

gases

Aquatic ecosystems

Freshwater 0.3 % of the

surface is contained in fresh water ecosystems.

Salinity: 0.18 g/L TYPES: Lentic : still water Lotic: running

water

Marine: About yhe 97% of

water on Earth. Temperature in

tropcal areas: 32 ºC, polar regions: -2ºC

Salinity: 35 g/L Classification

according to depth and distance from the coast.

Marine ecosystems

INTERTIDIAL ZONE: area between marks

NERITIC ZONE: it recieves ample sunlight, seaweed covering the sea floor and very rich in life.

PELAGIC ZONE: open sea ABYSSAL PLAIN: high pressure,

temperature around 2-3 ºC. Little food and very little light reaches the sea floor

Intertidial areas and coral reefs

Adaptations