Ecology as it relates to Biomass and Population

[Jimmy21]

1.) How does population density affect death rate?

2.) Why does the biomass in terrestrial ecosystems decease as one proceeds up to higher trophic levels?

3.) Which marine biome has the greatest species richness?



Thank you very much....I would really appreciate the help.....

[James]

In most cases an increase in population denisty leads to a higher death rate, due to increased competition

Because one fox will live on 30 rabbits, but 30 foxes will not live on 30 rabbits- Carnivores need a number of prey to feed on, otherwise not enough energy (only around 10% is passed on) will be available to live.

[biostudent84]

Carnivores need a number of prey to feed on, otherwise not enough energy (only around 10% is passed on) will be available to live.

About 10% of energy is transferred from the sun to plants. From plants to animals, and from animals to animals is about 1%.

[James]

Carnivores need a number of prey to feed on, otherwise not enough energy (only around 10% is passed on) will be available to live.

About 10% of energy is transferred from the sun to plants. From plants to animals, and from animals to animals is about 1%.

Thanx

[MrMistery]

Kyle, i think you are wrong.
My book says that 1-3% of the sun energy is absorbed by plants. 10% of the energy passes to the next level on the food chain

[James]

Ah, yes that sounds correct.

[mith]

0.02% according to mine.

[Poison]

My book says that 1-3% of the sun energy is absorbed by plants. 10% of the energy passes to the next level on the food chain

I read a book that says exactly what you wrote.

[biostudent84]

Yeah, sorry. I got them backwards. 1% is absorbed by plants, 10% is passed on through C-levels.