how do microorganisms return nitrogen or carbon dioxde to the atmosphere?

Question

^

Answer 1

all animals and plants are giving off CO2. Plants can change that to O2 and sugar.
Bacteria of decomposition breakdown all dead plants and animals releasing the nitrogen into the soil. The also breakdown animal and plant wastes to release N2.
Nitrifying bacteria on the roots of legumes can take the N2 from the air and change it to nitrates that plants can use.

Answer 2

All heterotrophic organisms release carbon dioxide as they break down organic (carbon containing) molecules.

Bacteria and fungi (collectively called decomposers) convert nitogen containing organic matter (like proteins) and waste into ammonium.

Bacteria in the soil called nitrifying bacteria convert ammonium ions into nitrate ions.

Bacteria called denitrifying bacteria convert nitrates into nitrogen gas that is released into the atmospehre.

Answer 3

microorganisms rispiration can be very high in some inviroments example the warm moist conditions on the floor of a rainforest microorganims can contribute 80 percent of co2 in that enviroment by feeding on decaying animals they rlease the trapped carbon dioxide

Answer 4

They break down organic and inorganic compounds such as ammonia NH3 (found in urine inorganic), dead leaves, rotting flesh etc.