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What variables always decreases as it flows through the trophic levels?
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∙ 8y ago
Energy
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∙ 8y ago
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What model shows the number of organisms at each tropic level in an ecosystem?
The major types of ecological pyramids are a pyramid of numbers or biomass or energy.The pyramid of numbers depicts the number of individual organisms at different trophic levels of food chain. Successive links of trophic structure decrease rapidly in number until there are very few carnivores at the top.In many ecological pyramids, the producers form the base and the successive trophic levels make up the apex. The apex is a term meaning pointed top.Energy pyramids are always slopping because less energy is transferred from each level than was paid into it.
What is an explanation of why producers are always found at the lowest trophic level?
The "trophic level" is the position that an organism occupies in a food chain - what it eats, and what eats it. As plants are producers (that is they make their own food from the air, water and sunlight), and all other organisms are consumers (that is they do not make their own food but eat other organisms to get it), this means that everything actually lives on the food that the plants make. Plats are therefore at the base of the food chain - the lowest trophic level.
What are advantages and disadvantages of pyramids of biomass?
ADVANTAGE -the total mass of the organism is estimated for each trophic level -shape always get narrower nearer the top DISADVANTAGE -it is more laborious and expensive in terms of time and equipment -impossible to catch/weigh all the organisms
Why is a pyramid the best shape to show how energy move through and ecosystem?
A pyramid can represent the energy transfer in an ecosystem in two ways: First, right side up a pyramid can represent the number or volume of organisms at each level of the food chain. The energy transferred from each organism lower down on the food chain to the next higher up is not 100 percent efficient, so fewer organisms can exist at each higher level of the food chain. Inverted, the pyramid is a simple model of how much total energy it takes to produce a single organism at a level in the food chain. organisms at the bottom taking the least, and those at the top taking the most total energy.
How is a constant and an independent variable similar?
An independent variable or manipulated variable is when you change it on purpose. For example, say your scientific problem was "Does certain substances affect how fast water is frozen?" Those substances are the indepentant variables. A dependant variable is how you measure the dependant variable. For instance, the dependant variable would be how fast the water is frozen. The things they have in common are that they are both variables and are subject to change.
If two variables have a direct relationship what happens to the value of one as the value of the other changes?
One variable always decreases as the other decreases. One variable always increases as the other increases.
When a graph of two variables showm a strait line passing through the point 0 0 the two variables are?
The equation of a line that passes through (0, 0) is y = x, where the two variables x and y have always the same values.
What is trophic level in Biology?
Each step in a food chain or food web. Autotroph are always trophic level 1.
Do primary consumers always make up the first trophic level in a food web?
No. Producers always make up the first trophic level in a food web or chain.
Are producers always the largest level in a trophic pyramid?
true
Do equations always have variables?
not always.
In an ecosystem the first trophic level always belongs to what?
producers- plants
The solubility of gases does what as temperature increases?
It usually decreases.
Why can't there be unlimited number of trophic levels?
There are not enough organisms in every environment to keep trophic levels going. For instance, there is always a top predator that has virtually no enemies.
Do primary consumers make up the first trophic level in a food web?
No. Producers always make up the first trophic level in a food web or chain.
What level is autotraph on the trophic level?
Autotrophs are always in the first level, they're the producers.
When heat energy is transferred between trophic levels. what is always given off to the environment?
heat
