Which organism oils most likely be the main source of oxygen in a forest ecosystem

Phytoplankton

Phytoplankton are the main organisms responsible for oceanic photosynthesis. These one-celled plants obtain most of their carbon dioxide not from the air but from the depths of the ocean. Much of the oxygen they produce eventually makes its way into the atmosphere, however

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•there must be variation for the particular trait within a population.

•the variation must be inheritable (that is, it must be capable of being passed on from the parents to their offspring).

•individuals with one version of the trait must produce more offspring than those with a different version of the trait.good

explanation:

answer: national resource conservation services

national resource conservation services is the us. based approach that provides technical and financial assistance for natural resource management. nrcs society in conservation of resources by involving in activities like farmland protection, flood prevention, watershed protection, urban conservation, conserves economic and environmental conditions. it conducts soil surveys and implements the policy of natural resources management on the society.