apostila-cadeia-e-teia-alimentar

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Para entender o conceito de cadeia e 
teia alimentar, vamos começar falando dos 
níveis de alimentação ou níveis tróficos. 
 Produtores: são seres autótrofos 
(produzem o próprio alimento) e pertencem 
ao primeiro nível de alimentação (trófico). 
Ex.: vegetais, fitoplâncton, etc. 
 Consumidores: são seres que não 
produzem o próprio alimento 
(heterotróficos). O consumidor primário se 
alimenta do produtor, o consumidor 
secundário se alimenta do consumidor 
primário e assim por diante. 
 
 
 
 
 Decompositores: são fungos ou 
bactérias que degradam matérias orgânica 
em matéria inorgânica, assim, reciclando a 
cadeia alimentar. 
Uma cadeia alimentar simples é 
quando encontramos apenas um indivíduo 
em cada elo ou nível trófico. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Na cadeia alimentar aquática, temos 
como produtor o fitoplâncton e consumidor 
primário o zoooplâncton. 
 
 
 
 
 
 
 
 
 
Consumidores Alimentos 
Herbívoro Vegetais 
Carnívoro Carne 
Onívoro Carne e Vegetais 
Detritívoro Detritos 
 
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A teia alimentar é quando temos mais de um indivíduo por elo da cadeia ou nível alimentar 
(trófico). Formada por duas ou mais cadeia alimentares. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
TEIA ALIMENTAR AQUÁTICA 
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REFERENCIAL TEÓRICO 
 
AMABIS, J.M.; MARTHO, G.R.; Fundamentos da Biologia Moderna. Ed. São Paulo: Moderna, 
2018. 
TOWNSEND, C. R., M. BEGON, M.; Harper, J. L. Fundamentos em Ecologia. 3ªed. Artmed, 
2009. 
RICKLEFS, R.E.; RELYEA, R. A Economia da Natureza. 7ª ed. Editora Guanabara Koogan, 2016. 
 
REFERÊNCIA DE IMAGENS 
Imagens utilizadas sob licença da Shutterstock.com 
 
 
 
 
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