How does the concentration of DDT change as you move to higher trophic levels?

Correct answer is B. “Higher trophic levels have higher concentrations of DDT”. The general trend is an upward slope, or a positive correlation. As the trophic level increases, the concentration of DDT is higher.

What happens to the concentration of DDT as it moves up the trophic levels in food chains?

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

Why does the concentration of DDT increase as the trophic levels increase?

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.

How does the concentration of DDT change as you move up the food chain and what impact does that have on the top consumer?

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.

What is the concentration of DDT for first trophic level?

Hence, the correct answer is '25 ppm'

DDT was sprayed in a lake to regulate breeding of mosquitoes. How would it affect the trophic levels

What is the relationship between the trophic level and the amount of DDT found in the body of these organisms?

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.

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.

How does DDT move through food chain eventually harming bald eagles?

Larger fish ate the smaller fish and acquired the DDT molecules in their tissues. Eventually, bald eagles ate the larger fish with the DDT and DDT built up even more in the eagle's body tissues. This caused the eagle's egg shells to become soft and easily breakable, limiting their reproductive capacity.

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.

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 is biomagnification mention the effects of DDT on biomagnification?

What is Biomagnification? Biomagnification can be defined as the rise or increase in the contaminated substances caused by the intoxicating environment. The contaminants might be heavy metals such as mercury, arsenic, and pesticides such as polychlorinated biphenyls and DDT.

Does DDT cause biomagnification?

The persistence of DDT in the environment and the bioaccumulation and biomagnification of this compound has led to serious health effects in many organisms.

How did high concentrations of DDT affect bird populations?

The high concentration of DDT interferes with the calcium metabolism of birds and induces eggshell thinning. Premature breakage. This causes the population to decrease. Additional Information: Bald eagle and other bird populations collapsed as DDT thinned their eggs killing their embryos.

How does DDT in the environment affect many birds quizlet?

how does DDT affect animals? for animals, such as birds, it can disturb the reproductive processes, such as thinning the eggshells or lead to imbalances of ions in cells that affects the nervous system in some fish.

What are the effects of DDT?

Following exposure to high doses, human symptoms can include vomiting, tremors or shakiness, and seizures. Laboratory animal studies showed effects on the liver and reproduction. DDT is considered a possible human carcinogen.

How does DDT move through the environment?

DDT, DDE and DDD may also enter the air when they evaporate from contaminated water and soil. DDT, DDE, and DDD in the air will then be deposited on land or surface water. This cycle of evaporation and deposition may be repeated many times. As a result, DDT, DDE, and DDD can be carried long distances in the atmosphere.

In what way did DDT affect bald eagles?

The culprit was DDT - a widely used pesticide that, when ingested, prevented the eagles from reproducing successfully by weakening their offsprings' eggshells. The bald eagle population declined and became critically endangered.

How did DDT bioaccumulate in bald eagles?

DDT was sprayed on agricultural crops, at which point it entered the water cycle. It was carried by surface-water runoff to rivers and lakes (figure 6). DDT then entered the bald eagle food chain through aquatic producers, which were then eaten by fish, which are the main food source for bald eagles.

What happens to the amount of energy as it moves between trophic levels?

At each step up the food chain, only 10 percent of the energy is passed on to the next level, while approximately 90 percent of the energy is lost as heat.

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.

When the concentration of something increases along a food chain?

The term food web biomagnification is used to describe trophic enrichment of contaminants within food webs and refers to the progressive increase in chemical concentrations with increasing animal trophic status.

Which trophic level would have the highest DDT levels quizlet?

The DDT concentration increases exponentially with every trophic level. As the tertiary consumers, osprey are at the highest trophic level in this community and they have the highest DDT concentrations in their tissues.

How did high concentrations of DDT affect bird populations quizlet?

High concentrations of DDT affect bird populations by making their eggshells weak so when birds sit on their eggs to keep them warm, they end up crushing the eggs which can put the species at risk for extinction.

What is the major effect of DDT on birds?

DDT caused direct mortality of some birds by poisoning their nervous system even in birds like robins that feed relatively low on the food chair. ' (See article beginning on p.) DDT and its metabolites cause eggs to have thin shells and reduce levers of a hormone necessary for female birds to lay eggs.

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 .