Comparing Ecosystems Terrestrial vs. Aquatic Ecosystems Lesson 38.
ECOSYSTEMS
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Transcript of ECOSYSTEMS
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ECOSYSTEMSTERRESTRIAL AND AQUATIC
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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.
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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.
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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
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Mosses and lichen
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Fir tree and lemmings
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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
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Oak and mountain lion
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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
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Savannah and rainforest
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Man-made ecosystems
Cultivated land Parks and gardens
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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
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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.
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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
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Intertidial areas and coral reefs
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Adaptations