zeljasti ekosistemi: livade i pašnjaci
TRANSCRIPT
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Zeljasti ekosistemi:livade i pašnjaci
Damnjanović Ivana
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Veštački travni ekositemi
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Nastaju delovanjem čoveka:-krčenjem šuma-isušivanjem močvara
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Livade se održavaju redovnom kosidbom, a pašnjaci ispašom
Za vreme kosidbe (tokom leta) livade promene svoj izgled
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Među biljkama su najzastupljenije trave
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Trave sa nežnom okruglom stabljikom su slatke trave jer ih stoka rado jede
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Slatke trave su: livadarka, ježevica, mirisavka, kelerija, popino prase, lisičiji repak i dr.
Livadarka Ježevica
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Mirisavka Kelerija
Lisičji repakPopino prase
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Trave koje u svojim listovima i stablu imaju kristale silicijuma su oštre trave i stablo im je trouglasto i oštro Oštre trave su : šaš, sita, oštrica, ovisk
Šaš Oštrica
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Sita Ovsik
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Druge zeljaste biljke livada i pašnjaka su: crvena detelina, lucerka, zvezdan, grahorica, livadska žalfija, ljutić, mrazovac...
Crvena detelina Lucerka
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Zvezdan
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Grahorica Ljutić
Livadska žalfija Mrazovac
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Od životinja na livadama su prisutni: bumbar, skakavac, zrikavac, bogomoljka, trčuljak, leptir kupusar, dnevni paunovac, plavac, lastin repak, poljski gušter, slepić, poljska ševa,...
Bumbar Skakavac
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Zrikavac
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Bogomoljka Trčuljak
Leptir kupusar Dnevni paunovac
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Plavac
Lastin repak
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Poljska ševa
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Fazan
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Pod zemljom su prisutni: kišna glista, krtica, slepo kuče...
Krtica
Slepo kuče
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Šta ugrožava travne ekosisteme?
Izgradnja naselja, autoputeva
Porast broja stanovnika veća potreba za hranom
Deponije
Kisele kiše
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Posledice uništavanja travnih ekosistema
Nestajanje životinjskih vrsta
Uništavanje plodnog sloja zemljišta
Poplave i bujice
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HVALA NA PAŽNJI :)