What is the concentration of DDT for first trophic level?

Hence, the correct answer is '25 ppm'

What happens to the concentration of DDT in each trophic level 1 point?

Solution : DDT concentration continuously increases in successive trophic levels in a food chain.

Why is DDT concentration in trophic levels?

This is because the consumers at the successive trophic level consume more than the previous level to fulfill the energy requirements. Due to this, DDT keeps on accumulating in the successive trophic levels in higher concentrations. This process is called biomagnification. Hence, The correct answer is option (A).

What is concentration of DDT?

Basis for revised IDLH: The revised IDLH for DDT is 500 mg/m³ based on acute toxicity data in humans [Neal et al. 1944; Windholz 1983]. This may be a conservative value due to the lack of relevant acute toxicity data in humans exposed to concentrations above 423 mg/m³.

What trophic level is most affected by DDT?

The higher the trophic level of an organism, the higher the concentration of DDT. DDT is excreted from the body very slowly and it is stored in fat. Thus, when an organism consumes another organism, the DDT in the prey accumulates in the predator.

Increasing concentration of DDT in organisms of a food chain in higher trophic levels is known as

What do you notice about the concentration of DDT as you go up the energy pyramid?

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.

What concentration of DDT did the birds have in their bodies?

The birds' brains contained concentrations of DDE, a breakdown product of DDT, ranging from 155 to 1,043 parts per million, with an average of 552.

What happens to the concentration of DDT as it moves through a food chain?

Answer and Explanation: As Dichlorodiphenyltrichloroethane (DDT) moves up the trophic levels in food chains, or food webs, its concentration increases.

What happens to the amount of DDT per organism as you move up the food chain?

The amount of DDT increases as you move up the food chain.

What is DDT in food chain?

Dichlorodiphenytrichloroethane (DDT) is an organochlorine insecticide with a broad spectrum of activities such as the control of pest in forest and on agricultural crops, household pests, vector-borne diseases like malaria, typhus, etc.

What happens to the concentration of DDT in each trophic level * 1 point decrease increases remains unchanged becomes zero?

Hence, the correct answer is 'Increases'.

Where is the pesticide concentration the highest?

Pesticide residues were found more frequently in topsoil. Overall, the concentration of pesticides ranged from 1.0 μg kg⁻¹ to 251 μg kg⁻¹, with a mean of 16 μg kg⁻¹.

Where is the highest concentration of DDT found?

The highest amount of DDT and derivatives residues were found in carnivore fish species, C. striatus which is the top predator of food web. In contrast, the lowest residue levels of DDT and derivatives were found in the omnivores, P. gonionotus.

What happens to the concentration of DDT in each trophic level Mcq?

An example is DDT whose concentration increases at each trophic level.

What is the concentration of DDT in a small fish?

Hence, the correct answer is 'Water-0.003ppm, zooplankton- 0.04ppm, small fish-0.5ppm, large fish-2ppm, fish eating birds-25ppm' Was this answer helpful?

How much DDT is phytoplankton?

The predicted ratio of the concentration of DDT in phytoplankton to its concen- tration in the shallow sea is approximately 35 : 1, and the ratio of the con~ntration of DDT in zooplankton to the concentration of DDT in phytoplankton is slightly less than 3 : 1.

How does DDT enter food chain?

Answer and Explanation: DDT enters the food chain after it gets spread, either from getting on insects, plants, or water runoff.

What is the impact of DDT on birds and other higher trophic level organisms?

Rather, DDT and its relatives alter the bird's calcium metabolism in a way that results in thin eggshells. Instead of eggs, heavily DDT-infested Brown Pelicans and Bald Eagles tend to find omelets in their nests, since the eggshells are unable to support the weight of the incubating bird.

What concentration of DDT did the estuary have in it provide a number in parts per million ppm?

This is called biomagnification. Chemicals like DDT are often measured in parts per million. (To understand this, see our lesson on parts per million). In an estuary off Long Island Sound, Rachel Carson learned that in the water the DDT measured only three parts per trillion (that's only 0.000003 ppm!).

How is DDT measured?

Exposures to DDT can be measured in the blood and fat, where its presence would be expected. However, its concentration in breast milk is often used as a measurement of DDT exposure within a population.

What is impact of DDT on fish eating birds Class 10?

The effect of DDT on fish eating birds are very high because they are at the Highest level of the chain. When fish eating birds , eat fish they increase the concentration of DDT in them ,which cause the thinning of shell of egg ,and premature breaking of egg. Leads to death .

What do you notice about the levels of DDT going from water to phytoplankton and on up to Pelicans?

The level of DDT in water is the same but as it goes into phytoplankton and up to pelicans, it started to gradually increase. When toxins increase as you go up the food chain/food web, it is called biomagnification.

How do you calculate the concentration of pesticides?

To determine the number of ounces of pesticide needed per gallon: Multiply the rate per gallon (0.02) by 128 (ounces in 1 gallon):0.02 × 128 = 2.6 oz. Mix a little less than 8 ounces of pesticide with slightly less than 3 gallons of water to make a 2% solution.

What is biomagnification of DDT?

Biomagnification happens when toxic chemicals, like DDT, whose remains in the environment are consumed indirectly by organisms through food. When an organism in the higher food chain consumes the lower organism containing such chemicals, the chemicals can get accumulated in the higher organism.

Is DDT a pesticide?

Dichlorodiphenyltrichloroethane (DDT) is an insecticide used in agriculture. The United States banned the use of DDT in 1972. Some countries outside the United States still use DDT to control of mosquitoes that spread malaria.