Which 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.
What part of the food chain is most affected by toxins?
In many cases, animals near the top of the food chain are most affected because of a process called biomagnification. Many of the most dangerous toxins settle to the seafloor and then are taken in by organisms that live or feed on bottom sediments.
Which organism contains the largest concentration of DDT?
The highest amount of DDT and derivatives residues were found in carnivore fish species, C. striatus which is the top predator of food web.
Which of the following best defines a dominant species in a community?
Which of the following best defines a dominant species in a community? Explanation: Dominant species are more numerous than their competitors in an ecological community. They can be said to define their communities, and they exert influence over the other species within their communities.
Which organism is most affected by DDT Why?
DDT is highly toxic to aquatic animals (14). DDT affects various systems in aquatic animals including the heart and brain (14). DDT is highly toxic to fish (14). Fish have a poor ability to detect DDT in water (14).
Which of the following groups is most susceptible to problems from DDT?
Plants/animals from which of the following groups are most susceptible to problems from DDT? primary producer, primary consumer, secondary consumer or tertiary consumer. Why? Tertiary consumers are more susceptible to problems from DDE because of biomagnification.
How does DDT affect the food chain?
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 happens to the concentration of DDT in each trophic level?
Solution : DDT concentration continuously increases in successive trophic levels in a food chain. This phenomenon is known as biological magnification or biological amplification.
Which can have the most impact on an ecosystem?
Unnatural occurrences can have the most significant impact on an ecosystem. ___________ ecology focuses on how human activities affect an ecosystem and ways to mitigate resulting issues. Select all that apply. What factors can limit growth?
Which one of the following belongs to more than one trophic level?
The correct answer is Planktons. Planktons belong to more than one trophic level. The representation of energy flow in an ecosystem is called the trophic level.
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.
What is the concentration of DDT for first trophic level?
Hence, the correct answer is '25 ppm'
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.
What are the impact of pollution on environment?
Air pollution can damage crops and trees in a variety of ways. Ground-level ozone can lead to reductions in agricultural crop and commercial forest yields, reduced growth and survivability of tree seedlings, and increased plant susceptibility to disease, pests and other environmental stresses (such as harsh weather).
What are the two factors affecting the ecosystem?
The environment includes two types of factors: abiotic and biotic.
- Abiotic factors are the nonliving aspects of the environment. They include factors such as sunlight, soil, temperature, and water.
- Biotic factors are the living aspects of the environment.
Mar 5, 2021
Which one of the following types of organism occupy more than one trophic level in a pond?
fish In pond, fish occupy more than one trophic level.
Which one of the following types of organisms occupy more than one trophic level in a pond ecosystem frog?
fishes Solution : In a pond ecosystem, fishes occupy more than one trophic levels.
What animals does DDT affect?
DDT has been suggested to be toxic to a range of wildlife including birds and marine animals, and its metabolite DDE (dichlorodiphenyldichloroethylene) causes eggshell thinning of certain bird species such as bald eagle and brown pelican, leading to declines of their populations (1,2).
How does DDT move through the food chain?
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 environmental environment pollution?
Environment means the things surrounding us on which we live, we eat etc. Environment is nothing but only our surrounding things which affect us, such as water, air and land. Environmental pollution refers to injection of harmful substances in atmosphere. Environmental pollution are of four types: (1) Air pollution.
Who is most affected by air pollution?
Populations most at risk of health problems related to air pollution:
- People with lung diseases, such as asthma, chronic bronchitis, emphysema, and chronic obstructive pulmonary disease.
- Infants and young children.
- People who work or exercise outdoors.
- Adults over 65.
- People with a cardiovascular disease.
How does an environmental factor affect an ecosystem?
An environmental factor, ecological factor or eco factor is any factor, abiotic or biotic, that influences living organisms. Abiotic factors include ambient temperature, amount of sunlight, and pH of the water soil in which an organism lives.
Which occupies more than one trophic level in a pond ecosystem a zooplankton B Fish C phytoplankton D frog?
So, the correct answer is option C, fish.
How does the elimination of organisms from the higher trophic levels affect the ecosystem?
Answer: Organisms at the higher trophic level, if removed then the organisms at the trophoc level below them will increase in large number because no one will be present to consume them. This will disturb the food chain also. Hence, removing these organisms will result in extreme imbalance.
Which of the following can occupy more than one trophic level in the same ecosystem at the same time?
An organism that may occupy more than one trophic level simultaneously is a sparrow. Sparrow is a primary consumer when it eats seeds, fruits, peas and a secondary consumer when it eats insects and worms.
How does DDT affect the ecosystem?
What effects does DDT have on wildlife? DDT is slightly to moderately toxic to birds when eaten (15). DDE decreases the reproductive rate of birds by causing eggshell thinning and embryo deaths (14). DDT is highly toxic to aquatic animals (14).
How does DDT affect the different organisms?
DDT affects the central nervous system of insects and other animals. This results in hyperactivity, paralysis and death. DDT also affects eggshell production in birds and the endocrine system of most animals. DDT has a very high tenancy towards biomagnification.
What is the effect of environmental pollution?
Environmental pollutants have various adverse health effects from early life some of the most important harmful effects are perinatal disorders, infant mortality, respiratory disorders, allergy, malignancies, cardiovascular disorders, increase in stress oxidative, endothelial dysfunction, mental disorders, and various …
What are the main sources of environmental pollution?
The main sources of pollution are household activities, factories, agriculture and transport. Once they have been released into the environment, the concentration of some pollutants is reduced by dispersion, dilution, deposition or degradation.
Who is most affected by environmental pollution?
Populations most at risk of health problems related to air pollution: People with lung diseases, such as asthma, chronic bronchitis, emphysema, and chronic obstructive pulmonary disease. Infants and young children. People who work or exercise outdoors.