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Why does the amount of DDT go on increasing at each level of the food chain?
Wiki User
∙ 13y ago
It becomes more concentrated as it accumulates higher up the food chain, predatory species eating herbivorous species end up with deposits in their tissues of dangerously toxic levels. Fish are a prime example, as humans routinely eat predatory fish species (tuna, mackerel, cod, salmon, etc.) which have absorbed the DDT and PCBs (and heavy metals like Mercury) accumulated in the bait species they feed on. The long life span of these species means over time the levels become dangerous. Fish in many places are now considered dangerous to eat regularly (e.g. salmon from Lake Michigan).
Wiki User
∙ 13y ago
Wiki User
∙ 13y agoSome chemicals taken in by plants can not be excreted by organisms so they remain in that organism until it dies or is consumed by another organism. Following the trophic levels of the food chain each step up 10% of the original energy is consumed so naturally they have to eat more and more(other organisms possibly with chemical such as ddt in them) and without being to excrete or get rid of harmful chemicals like ddt increasing amounts accumulate in higher trophic organisms.
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What pyramid represents the amount of energy or matter that exists in each level of a food chain?
a food web
The amount of energy that is transferred at each level of the food chain is about?
It depends on the activity of the animal in question but it is usually around 10%.
What happens to the amount of energy available to each successive trophic level in a food chain?
It decreases because there are less and less animals as you go up.
What is a Chart that shows the amount of energy that moves from one level to another in a food chain?
It isn't really a chart. But a pyramid would show the decreasing amount of energy available to those organisms in each level to live, grow and reproduce.
Is the amount of chefs increasing or decreasing?
The number of chefs world wide are surely increasing each year.
What is a pyramid of mass?
a pyramid of mass is the amount of matters with in a substance and it contain about two of the previous level of a foodchain.A pyramid of mass represents the weight of food that is living in each level of a food chain
What do the three types of ecological pyramids illustrate?
Pyramids of energy show the relative amount of energy available at each trophic level of a food chain or food web. (:
What happens to the energy level as a substance moves from the solid to the liquid and eventually to the gaseous state?
the amount of motion of each molecule increases. i.e the amount of disorder increases. since the motion is increasing as an object gets converted from solid to liquid to gas, the energy level increases.
Each step in a food chain or food web?
trophic level
What type of diagram shows the amount of biomass available in each level in the food chain or food web?
This is called a pyramid. The base is very wide and top is very, very narrow.
How are energy pyramids and trophic level alike?
The trophic levels show which organisms are at each level of the energy pyramid. The pyramid is shaped exactly as a pyramid. The lowest level contains the most energy and the most in number and variation of species. The next level only has 10% of the first levels' energy and fewer species. The amount of energy in the first level determines the number of levels possible. The tropical rain forest has the most levels (as many as 4) and a desert has the fewest (as few as 2). See links below:
What shows the decrease of energy at each level of a food chain?
an energy pyramid
