Which of these is a biotic factor of an ecosystem. (I put more in the Description box)

Question

A:The temperature of water in the stream. B:The amount of water vapor present in a rain forest. C:the bacteria that live in the intestine of a rabbit. D:The rocks that provide cover for a rattlesnake.

Answer 1

A biotic factor is a living organism that shapes its environment. Here are some examples:

cyanobacteria adding oxygen to the atmosphere

Plants changing the mineral composition of the soil

fungi breaking dead trees back down into soil

Now let's look at the options:

A) The temperature of water in the stream

This will definitely effect an ecosystem, but water temperature is not a living organism. This is an abiotic factor.

B) The amount of water vapor present in a rainforest. Also an abiotic factor.

C) The bacteria that live in the intestine of a rabbit. A living thing impacting its environment! This is a biotic factor

D) The rocks that provide cover for a rattlesnake. Another abiotic factor

Can you think of some biotic and abiotic factors in a tundra?