Biotic factors. Biomes Interactions between organisms Productivity In fossil record we recognize: Relationship between organisms Paleoproductivity. Relationship between orgnisms. NEUTRALISM (TOLERANCE) 0/0.
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Elimination of one species
Partition in using the resources or different way of using resources
Carbon isotoped one.
You are what you eat
Paleoproductivitycan be recognised based on compositon of diatoms assembalge and the amount of biogene opale in sediments.