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Transcript
Chapter 3~The Biosphere 3.1~What is Ecology? -Biosphere extends from 8km above Earth to 11km below the ocean. ~It consists of all life on Earth & all parts of the Earth in which life exists (land, water, & the atmosphere) -Ecology-study of interactions among organisms & between organisms & their physical environment. ~These interactions make a web of interdependence between organisms & the environment that they live in. ~organisms respond to their environment & can change their environment making an ever changing biosphere. Levels of Organization (see pp 64-65) Individual Organism (1 animal, part of species) Population (group of animals that are part of species and live in same area) Community (a bunch of different populations that live together in an area) Ecosystem (all the organisms that live in a place with their environment) Biome (group of ecosystems that share similar climates & typical organisms) Biosphere (the whole planet) Biotic & Abiotic Factors -Biotic Factor-any living part of the environment that an organism might interact (animals, plants, mushrooms, Bacteria) -Abiotic Factor-any nonliving part of the environment (like sunlight) Ecological Methods Observations (asking a question) Experimentation (to test hypothesis) Modeling (making models to help them understand)