TERRESTRIAL AND AQUATIC ECOSYSTEMS Terrestrial Ecosystems Organisms can

TERRESTRIAL AND AQUATIC ECOSYSTEMS

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, lichens Reindeer, 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 Mediterranean forest: Warm dry summers, low rainfall Oak, beech, chestnuts trees Bears, foxes, squirrels, mountain lions 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 Marine: 0. 3 % of the surface is contained in fresh water ecosystems. About yhe 97% of water on Earth. Salinity: 0. 18 g/L TYPES: Lentic : still water Lotic: running water 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