Lanac ishrane i trofička piramida
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Transcript of Lanac ishrane i trofička piramida
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LANAC ISHRANE I TROFIČKA PIRAMIDA
Damnjanović Ivana
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Bliska povezanost između članova biocenoze se najbolje uočava kroz odnose ishrane u okviru jednog ekosistema
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Procesom ishrane organizmi zadovoljavaju potrebe za stvaranjem sopstvene materije kao i:
-obnavljanje materije i-utrošene energije u životnim procesima
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TIPOVI ISHRANE
AUTOTROFNA
HETEROTROFNA
MIKSOTROFNA
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Autotrofi-PROIZVOĐAČI-
Heterotrofi-POTROŠAČI-
Saprotrofi (heterotrofi)-RAZLAGAČI-
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Autotrofna ishranaProces fotosintezeZelene biljkeBakterije (monera)Neke vrste praživotinje, alge (protisti)
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Autotrofni organizmi su proizvođači organskih supstanci
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Heterotrofna ishrana
Organizmi koji koriste gotovu hranuŽivotinje
Potrošači
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Biljojed Mesojed Svaštojed
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Biljojed-potrošač 1. reda Mesojedi koji se hrane biljojedima-potrošači
2. reda
Biljojedima i mesojedimase hrane potrošači 3. reda
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Razlagači
Heterotrofi koji razlažu organske materije do neorganskih Neke vrste gljiva i bakterija
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Različite vrste su međusobno povezane LANCIMA ISHRANE počevši od proizvođača, preko potrošača, do razlagača
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POTROŠAČI
LOVAC PLEN
PROIZVOĐAČI
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POTROŠAČ 3. REDA POTROŠAČ 2. REDA POTROŠAČ 1. REDA PROIZVOĐAČ
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Lanac ishrane
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Jedna vrsta može biti član više lanaca ishranePtica je u odnosu na puža predator, a u odnosu na lisicu plen
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Lanci ishrane nisu izdvojeni već se međusobnoprepliću i grade MREŽE ISHRANE
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TROFIČKA PIRAMIDA-piramida ishrane-
Trofička piramida je grafički prikaz odnosa brojnosti i mase biljaka, biljojeda i mesojeda u ekosistemuU njenoj osnovi su zelene biljke, odnosno proizvođači, čija je brojnost i ukupna masa najveća u ekosistemuPiramidu dalje čine potrošači prvog reda (biljojedi), pa potrošači drugog i trećeg reda.
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Lanac ishrane u voćnjaku
Lanac ishrane na njivi
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Primeri lanca ishrane (4-6 članova u jezerskoj životnoj zajednici):
Žaba Lokvanj Barska zmija
Roda Štuka Mušica
____________>___________ >____________ > ____________ > ___________>___________
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Primer lanca ishrane u šumskoj zajednici
____________>___________ >____________ > ____________
Lanac ishrane na livadi
____________>___________ >____________ > ____________ > __________
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HVALA NA PAŽNJI