Could a fallen tree in a forest be regarded as an entire ecosystem? explain.

I believe it's yes

Explanation:

Decaying fallen trees provide nutrients for these species (e.g Fungi). They are also habitat for animal and plants, including spiders, insects, birds. So,since it can provide a habitat and food source for animals/plants it can be considered an ecosystem

carbohydrates: (starches and sugars) composed of carbon, hydrogen, and oxygen.

lipids: (fats, oils, and waxes) are made of carbon and hydrogen atoms.

nucleic acids: contain hydrogen, oxygen, nitrogen, carbon, and phosphorus. they are polymers of nucleotides. a nucleotide has three parts, a 5-carbon sugar, a phosphate     (-po⬇️4) group, and a nitrogenous base.

proteins: made up of nitrogen, carbon, hydrogen, and oxygen. they are polymers of amino acids.

where is the scientific experiment?