Consider the following pairs 1 Bioaccumulation nbs...........

Environment and Ecology Environment- Institutional Structure

Consider the following pairs:

1. Bioaccumulation : increase in the concentration of a substance as you move up the food chain across different trophic levels

2. Biomagnification : increase in the concentration of a substance occurs within a trophic level

3. Bioconcentration : increase in the concentration of a substance occurs within a trophic level by absorption directly from water

Which of the pairs given above is/are correctly matched?

1 and 2 Only

2 and 3 Only

3 Only

All of the above

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Explanation:

Bioconcentration and bioaccumulation occur within an organism, but biomagnification occurs across levels of the food chain.

Bioamplification (or biomagnification) refers to an increase in the concentration of a substance as you move up the food chain.This often occurs because the pollutant is persistent, meaning that it cannot be, or is very slowly, broken down by natural processes. These persistent pollutants are transferred up the food chain faster than they are broken down or excreted.

In contrast, bioaccumulation occurs within an organism, where a concentration of a substance builds up in the tissues and is absorbed faster than it is removed.
Bioaccumulation often occurs in two ways: i) by eating contaminated food, and ii) by absorption directly from water. This second case is specifically referred to as bioconcentration. Bioconcentration is the accumulation of a chemical in or on an organism when the source of chemical is solely water.