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MEDIUL TROPICAT USCAT

MEDIUL TROPICAT USCAT.

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MEDIUL TROPICAT USCAT

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  1. MEDIUL TROPICAT USCAT

  2. MEDII SI PEISAJE TROPICAL-USCATELocalizare: 15˚-30˚ lat.: N Africii (Sahara), Pen. Arabia, Irak, Iran, Pakistan, India, Pod. Mexican, S Africii (Kalahari), America de S (Atacama), centrul si E Australiei;Caracteristicile factorilor de mediu:- climat cald si uscat (sub 200 mm precipitatii);- vegetatie saraca, adaptari (ciclu vegetativ scurt, radacini adanci, frunze reduse, spini);- fauna saraca (pradatoare, reptile, insecte);- vai seci (ueduri);- fluvii cu izvoare in regiuni cu precipitatii bogate: Nil, Senagal, Murray;- intinderi mari de nisip (erguri), campuri de pietre (hamade);Tipuri de peisaje:- deserturi – precipitatii rare, sub 150 mm pe an, averse, exista ani fara ploi; mase de nisip, campuri de pietre, cruste de saruri, vegetatie saraca;- semideserturi – precipitatii 300-350 mm, cad regulat; ierburi, arbusti; brusa cu acacii (N Saharei), brusa cu cactee (Mexic), caatinga (Brazilia);- muntii – versanti dezgoliti, cu mase de grohotis (amplitudini mari de t˚ - ridicate ziua, negative noaptea);- oazele – panza de apa subterana este la adancime mica; favorabile asezarilor umane; culturi de curmali, leandri, arbori de fistic; antropizari in zonele cu exploatari de petrol si gaze.a

  3. Realizat de :Hognogi Luminita Dragoi Adrian Fechete Domnita Giurgi Gabriela Magda Victor

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