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Up to 15 Inches of Rain Floods Texas Drought Wildfires What do these pictures have in common? Ecology Ecology - The study of interactions among organisms Biotic – Living factors Abiotic – Nonliving factors What nonliving things in your environment do you interact with? In what ways are these nonliving things essential to organisms? and between organisms and their environment. Levels of Organization in the Biosphere Single individual: organism Population: group of individuals of the same species Community: several populations that live together in an area Ecosystem: all organisms that live in an area plus their nonliving, physical environment Biome: a group of ecosystems that have the same climate Biosphere: the area on earth where life exists Organism Single Individual Population Group of individuals of the same species Community Several populations that live together in an area Ecosystem All organisms that live in an area plus their nonliving, physical environment Biomes: a group of ecosystems with the same climate Biosphere INTERDEPENDENCE No organism exists in isolation All types of organisms on earth depend on one another for their survival. What evidence is there that people in our society today are aware of the interdependence of living things?