What is the biomagnification of DDT?

When an animal consumes food having DDT residue, the DDT accumulates in the tissue of the animal by a process called bioaccumulation. The higher an animal is on the food chain (e.g. tertiary consumer such as seals), the greater the concentration of DDT in their body as a result of a process called biomagnification.

Is DDT subject to biomagnification?

DDT is thought to biomagnify and biomagnification is one of the most significant reasons it was deemed harmful to the environment by the EPA and other organizations. DDT is stored in the fat of animals and takes many years to break down, and as the fat is consumed by predators, the amounts of DDT biomagnify.

What is biomagnification of DDT in an aquatic food chain?

The biomagnification of DDT in the aquatic food chain from 0.003ppb in water to fish-eating birds would be 25ppm. Biomagnification is the process by which the concentration of toxic substances increases with each trophic level in the food chain.

What is biomagnification example?

Biomagnification is defined as the accumulation of a particular substance in the body of the organisms at different trophic levels of a food chain. One example of biomagnification is the accumulation of insecticide DDT which gets accumulated in zooplanktons. Small fishes consume these zooplanktons.

Why does DDT move through food chain?

Explanation: DDT increases or biomagnifies if we look at a food chain. DDT is fat-soluble, meaning animals store it in fatty tissues. It also takes a relatively long amount of time to break down.

Biomagnification and the Trouble with Toxins

What is meant by biomagnification?

Biomagnification is the accumulation of a chemical by an organism from water and food exposure that results in a concentration that is greater than would have resulted from water exposure only and thus greater than expected from equilibrium. From: Treatise on Geochemistry, 2007.

What is the reason for biomagnification?

Causes of Biomagnification

The agricultural pesticides, insecticides, fertilizers and fungicides are very toxic and are released into the soil, rivers, lakes, and seas. These substances contain small amounts of heavy metals such as mercury, arsenic, copper, lead and cadmium.

Which of the following exhibits biomagnification a so2 B mercury C DDT D Both B & C?

Solution : Biomagnification refers to increase in concentration of the toxicant at successive trophic level. This phenomenon is well known for DDT and Hg.

Is DDT biologically active?

To put these concentrations in perspective, consider that DDT is not biologically very active or even very toxic. Its great value in malaria control is due to its persistence on house walls and its powerful repellent actions, not its toxicity. As with all living organisms, insects live in a chemical world.

What is biomagnification 12th?

Biomagnification or biological magnification is a gradual increase in the concentration of toxicants at successive trophic levels. Certain toxic substances present in industrial waste undergo biomagnification.

What is biomagnification how biomagnification of DDT affects fish eating birds?

Biomagnification of DDT leads to an increase in its concentration at the higher trophic level and its higher concentration in birds leads to the disturbance in their calcium metabolism. This causes the premature breaking of eggs in birds due to thinning of eggshell.

How does biomagnification of DDT affect the bird population in aquatic food chain?

It is present in low amount in water and reaches a high concentration in fish-eating birds through biomagnification. Very high concentrations of DDT disturb calcium metabolism in birds, which causes thinning of eggshell and their premature breaking, eventually causing decline in bird populations.

What is the concentration of DDT for first trophic level?

Hence, the correct answer is '25 ppm'

How do you calculate biomagnification?

In general, the biomagnification of contaminants is basically quantified as the biomagnification factor in terms of the concentration of a given chemical in the consumer or predator relative to the concentration in the diet or prey (i.e. BMF= CB/CD, where CB is the chemical concentration in the organism and CD is the ...

How does DDT affect the environment?

DDT's devastating effect on the aquatic environment has been thoroughly studied. Due to it's low solubility, it has a greater rate of bioaccumulation in water, and thus poses a great long-term threat to aquatic wildlife.

How is the biomagnification of DDT a concern in relation to individual health?

When DDT enters the body, it tends to be stored in the fatty tissues and is excreted from the body over time. High amounts of DDT exposure can lead to problems with the nervous system and liver.

What type of pollutant is DDT?

(iv) DDT is a non – biodegradable pollutant.

Which of the following causes biomagnification a so2 and mercury B DDT and ch4 C DDT and mercury D so2 and ch4?

So, the correct answer is 'both (b) and (c)'.

Which of the following compounds is are well known for biological magnification DDT mercury silicon both 1 and 2?

Solution. Mercury and DDT are well known for biological magnification. Biological magnification is defined as increase in concentration of toxicants of toxicants at successive trophic levels.

Does mercury cause biomagnification?

Because mercury is a persistent substance, it can build up, or bioaccumulate, in living organisms, inflicting increasing levels of harm on higher order species such as predatory fish and fish eating birds and mammals through a process know as "biomagnification".

What is the effect of biomagnification?

Effects of Biomagnification

In addition, consumption of plants or aquatic animals that have assimilated heavy metals and toxic substances may lead to long-term effects such as different types of cancers, Kidney failure, respiratory disorders, brain damage, birth defects and heart diseases.

What is biological magnification Class 10 Ncert?

The process by which the harmful and toxic substances enter the food chain and get concentrated in the body of living organisms at each successive level in food chain is called biological magnification.

What is biological magnification explain with example class 10?

The accumulation of chemicals in the top most organism of the trophic level or food chain is called biological magnification. Example: Farmer sprays pesticides on the crops which enters the food chain from crops these pesticides enter into the organisms that feed on it.

What is biological magnification if the concentration of DDT?

Due to this, DDT keeps on accumulating in the successive trophic levels in higher concentrations. This process is called the biomagnification. 0.003 ppb in water, 0.04 ppm in zooplankton, 0.5 ppm in small fish, 2 ppm in large fish, 25 ppm in large fish eating bird. Hence, the correct answer is '25 ppm'