Question

What is a trophic level?

Answer 1

@nirmalnema

Answer 2

Trophic levels are the feeding position in a food chain such as primary producers, herbivore, primary carnivore, etc. Green plants form the first trophic level, the producers. Herbivores form the second trophic level, while carnivores form the third and even the fourth trophic levels. In this section we will discuss what is meant by food chains, food webs and ecological pyramids.

Answer 3

What happens to the energy from the sun as it moves through the different levels in a food chain? Does all of the energy stored in one trophic level make it to the next one?

Answer 4

@nirmalnema

Answer 5

In illinois XD put a picture up of urself

Answer 6

When light energy strikes the earth three things happen. Either it is relfected back into space, it is transmitted through an object, or it can be absorbed. In biology we are most interested in that energy which is absorbed and captured in photosynthesis.

Autotrophic (photosynthetic) organisms are responsible for the initial conversion of light energy into chemical energy. Here is how that is possible?

Depending on a specific latitute and longitude a specific amount of light energy is captured per square meter per year (m2/yr) on average. In tropical regions, where there is the greatest input of light, measured in KCal of energy/m2, results in a high energy availablity. This expresses itself in stunning biodiversity. If one travels to polar regions, much less solar input results in fewer KCal of energy input/m2/yr. This is the reason that biodiversity is greater near the equator and sparse near the poles.

Once energy is captured by autotrophs (producers), it is available for cycling through other trophic levels. Here are the trophic levels beginning with the highest energy content to the lowest.


Autotrophs
Primary consumers (herbivores)
Secondary consumers
Tertiary consumers
Quaternary consumers

10% Rule

In this exercise you will be working with statistical data which has been derived from studies made at particular geographic locations. Sometimes this kind of information is not available and an educated guess needs to be made on energy transfer from one level to the next. In this case the "Ten Percent Rule" is used. It is assummed that only 10% of the orginial energy will be completely transfered to the next trophic level and incorporated into tissue.
So, if we begin with 1 000 KCal of energy incorporated into plant tissue via photosynthesis, only 100 KCal would be available to the primary consumer, 10 KCal to the secondary consumer, 1 KCal to the tertiary consumer, and only 0.1 KCal to the quaternary level. One can quickly see why it is impossible for very many trophic level transfers to exist. There simply would not be enough energy available to support the next level. This is the reason that trophic levels typically do not go beyond secondary levels in the arctic, and could easily extend to the quaternary level in the tropics.

Answer 7

what do u mean by sex ?
@jonjon46931

Answer 8

so what??

Answer 9

ok.

Answer 10

@yololifelove do u get that ??

Answer 11

@jonjon46931 my god r u studying the psychological breakdown of men when they can't get a girl XD
@nirmalnema ya Its kind of long so hold on let me read it

Answer 12

hehehe...!! lol..
ok..!!

Answer 13

@nirmalnema ok i'm way beyond confused i'll write later k

Answer 14

ok.

Answer 15

Class of organism that occupy the same position in a food chain.