Answer:
producers- grass
Tertiary consumer- hawk
secondary consumer- chicken
autotroph- grass
heterotroph- chicken, grasshopper, hawk
primary consumer- grasshopper decomposers- nil
The energy, biomass and number of organisms decreases as the trophic level increases.
Explanation:
In an ecosystem, energy is derived when one organism feeds on another. This occurs in a chain called FOOD CHAIN. A food chain always begins with an organism called PRODUCER, which is always an autotroph because it can synthesize its own food directly via photosynthesis. The grass is the producer and autotroph in this question. The producer is fed upon by a PRIMARY CONSUMER, which is always an heterotroph because it cannot produce its own food and depends on the producers. The grasshopper is the primary consumer in this question and a heterotroph.
The primary consumer (grasshopper) is eaten by a SECONDARY CONSUMER, which is also an HETEROTROPH. The secondary consumer is the chicken in this question. Lastly, the secondary consumer is eaten by a TERTIARY CONSUMER, also an heterotroph. The hawk is the tertiary consumer in this question.
As the trophic level progresses from the producer to tertiary consumer, the available energy in the food chain decreases. Also, the biomass of each organisms decreases. Lastly, the number of organisms in each trophic level decreases as well. Based on this, the producer will have the highest energy, biomass and number while the tertiary consumer will have the least.
Classifying the animals in the ecological pyramid :
Producers ; grass.
Primary consumer; grasshopper .
Secondary consumer ; chicken.
Tertiary consumer ; hawk.
Autotroph ; grass.
Heterotroph ; chicken, grasshopper, hawk
Decomposers ; Nothing.
The number of organisms will decrease as we move up the pyramid and The Biomass and the energy in the ecological pyramid will decrease as we move upwards in the pyramid.
The producers are also autotrophs because they make use of light energy for the production of their food while primary consumers feed directly from the producers in the food chain, the secondary consumers consume the primary consumers.
Heterotrophs are generally consumers regardless of the level at which they consume, because they eat other plants or animals to get the required energy they need to perform.
Hence we can conclude that the classification of each organism in the ecological pyramid is as listed above.
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