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LIVING: NON-LIVING: Ecology - the study of the interactions of organisms with one another and with their environment. Ecologist – a scientist who studies ecology Biotic factors ◦ The living parts of an ecosystem Ex.: plants, animals, fungi, bacteria ◦ Bio = living; life Abiotic factors ◦ The nonliving parts of an ecosystem Ex: water, sunlight, oxygen, temperature, soil ◦ A = non; not; without ◦ Bio = living; life Single living thing A group of individuals of the same species that live together. All the different populations of species that live together in an area All of the biotic (living) factors Made up of all the living and nonliving things (biotic and abiotic factors) that interact in a particular area ◦ Examples: prairie, mountain stream, ocean, forest An organism’s habitat provides it with the things it needs to survive: ◦ Food, water, shelter A single ecosystem may contain many habitats. Organisms live in different habitats because they have different requirements for survival. The part of Earth where life exists ◦ The biosphere includes the top portion of Earth’s crust, all the waters that cover Earth’s surface, and the atmosphere that surrounds Earth. The biosphere is made up of different environments that are home to different kinds of organisms. ◦ For example, desert environments receive little rain. ◦ Cactus plants, coyotes, and lizards are included in the life of the desert. In groups, complete the following diagram to illustrate the various levels of ecological organization: Ecosystem Community Population Organism Choose an animal. Inside each level, draw a picture that illustrates your animal at each level. 1. 2. Give two examples of how abiotic factors can affect an ecosystem. What would happen to the other organisms in the salt-marsh ecosystem if the cordgrass suddenly died?