Las cadenas alimenticias

Written By: amapola - Oct• 05•12

La cadena refleja quién se come a quien (un ser vivo se alimenta del que lo precede en la cadena y, a la vez, es comido por el que lo sigue).Se alimentan para obtener energía transfiriéndose de los productores a los consumidores.

Éstos son los organismos que componen a la cadena alimenticia:

Productores: son las plantas quienes producen su propio alimento, aprovechando el aire, la energía del Sol y los nutrientes del suelo.

Consumidores: ellos a diferencia de las plantas no crean su propio alimento, ellos las toman de los productores y de otros animales. Existen diferentes tipos de consumidores:

-Los consumidores primarios: animales herbívoros

-Los consumidores secundarios: animales carnívoros (se alimentan de animales herbívoros)

-Los consumidores terciarios: animales carnívoros (se alimentan de otros animales carnívoros)

-Los desintegradores: hongos y bacterias que descomponen los desechos de plantas y animales. Cierran el ciclo ecológico.

 

 

Las necesidades alimenticias unen a los seres vivos como los eslabones de una cadena. El primer eslabón son los productores, el segundo los consumidores primarios, seguido de los secundarios y terciarios y al final están los desintegradores que son como ya se dijo anteriormente los que cierran el ciclo ecológico.

Las cadenas alimenticias pueden llegar a ser un poco complejas, cuando esto pasa se les dicen redes o tramas, las cuales inician con las algas que flotan en aguas superficiales. Gracias a estas algas se alimentan animales microscópicos como larvas y peces. Estas larvas y peces sirven como alimento para peces de mayor tamaño.

 

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