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ECOSYSTEMS

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 : Temperature : vries with altitude , latitude and proximity to sea. Light .

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ECOSYSTEMS

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  1. TERRESTRIAL AND AQUATIC ECOSYSTEMS

  2. TerrestrialEcosystems • Organisms can liveonland, surroundedby air. Thedistributiondependsmainlyonabioticfactorsrelatedtoclimate. • Abioticfactors: • Temperature: vrieswithaltitude, latitude and proximityto sea. • Light. • Humidity: quantity of water in air.

  3. Climatezones • Frigidzone: coldzonesfromthePolestothepolacrcircles. • Temperatezones: betweenthe polar circles and theTropics. • Torridzone: betweentheTropic of Cancer and theTropic of Capricorn.

  4. Frigidzone • Tundra: • Permanentlyfrozensoil Mosses, lichens Reindeer, whitefoxes, lemmings • Taiga: • Long, dark, coldwinter • Short humidsummers • Pine and firtrees • Bear, lynxes, wolves

  5. Mosses and lichen

  6. Firtree and lemmings

  7. Temperatezone • Deciduousforest • Cold and warmseasons, abundantrainfall • Oak, beech, chestnutstrees • Bears, foxes, squirrels, mountainlions • Mediterraneanforest: • Warmdrysummers, lowrainfall • Holmoaks, corkoaks • Rabbits, reptiles, wild boars, birds

  8. Oak and mountainlion

  9. Torridzone • Savannah (grassland) • Dry, wetseasons • Grass, schrubs • zebra, giraffes, gazelles, lions • Desert: • Highdaytimetemp., lownight time temp. • Cacti, camels, lizards • Rainforest: • Highrainfall and hightemp. Allyeararound. • Differentlayers of flora and fauna • Small toverylargetrees, snakes, iguanas, bats, monkeys, insects

  10. Savannah and rainforest

  11. Man-madeecosystems • Cultivatedland • Parks and gardens

  12. AQUATIC ECOSYSTEMS • Creatures can livesurroundedbywater. • Abioticfactors: • Light: itdecreases as thewatergetsdeeper. • Temperature: itvarieswithdistancefromthecoast and thedepth of water • Pressure: increases as thewatergetsdeeper • Salinity: itvaries in aquaticecosystems • Oxygen: A E havelessoxygen and fewer gases

  13. Aquaticecosystems • Freshwater • 0.3 % of thesurfaceiscontained in freshwaterecosystems. • Salinity: 0.18 g/L • TYPES: • Lentic : stillwater • Lotic: runningwater • Marine: • Aboutyhe 97% of wateronEarth. • Temperature in tropcalareas: 32 ºC, polar regions: -2ºC • Salinity: 35 g/L • Classificationaccordingtodepth and distancefromthecoast.

  14. Marine ecosystems • INTERTIDIAL ZONE: areabetweenmarks • NERITIC ZONE: itrecievesamplesunlight, seaweedcoveringthe sea floor and veryrich in life. • PELAGIC ZONE: open sea • ABYSSAL PLAIN: highpressure, temperaturearound 2-3 ºC. Little food and verylittle light reachesthe sea floor

  15. Intertidialareas and coral reefs

  16. Adaptations

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