Science
(a) Name the group of organisms which form in the first trophic level of all food chains. Why are they called so ?
(b) Why are the human beings most adversely affected by bio-magnification ?
(c) State one ill-effect of the absence of decomposers from a natural ecosystem.
Environment
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Answer
(a) The group of organisms which form the first trophic level of all food chains are producers. They are called so because they are the only one to change the light energy of sun to chemical energy of food. The same energy goes to other trophic levels in food chains
(b) Bio-magnification refers to progressive accumulation of chemicals at each trophic level. Human beings are most adversely affected by bio-magnification because they are at the top of any food chain. Therefore, the maximum concentration of these chemicals get accumulated in human bodies.
(c) Without decomposers, the organic matter would not be efficiently broken down and recycled into essential nutrients, leading to the accumulation of dead organic matter in the ecosystem. This will disrupt the natural recycling of nutrients, negatively impacting soil fertility, promoting disease, and hindering the overall health and functioning of the ecosystem.
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