How Ecosystems WorkSection 3 DAY ONE Chapter 5 How Ecosystems Work Section 3: How Ecosystems Change.
ECOSYSTEMS
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Transcript of ECOSYSTEMS
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