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Introduction to Ecology

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Introduction to Ecology

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  1. Introduction to Ecology

  2. What is Ecology? • Biotic vs. Abiotic Factors • Ecology is the study of interactions between organisms and their environment. • Biosphere– portion of the Earth supporting life • Biotic factors • a. All organisms inhabiting the environment • b. Each organism adapts to its part of the biosphere • Abiotic factors • a. Nonliving parts of the environment • b. Can determine which species will survive • examples: rainfall, temperature, light, soil

  3. Abiotic Factors Biotic Factors ECOSYSTEM

  4. C. Levels of Biological Organization • Populations a. A group of organisms of the same species living together b. Must compete for resources • Community a. Several populations that interact b. Changes in one population will cause changes in the others • Ecosystem a. Interactions between populations and theirsurroundings b. 2 main types: 1. Terrestrial – land 2. Aquatic – fresh or salt water

  5. Levels of Biological Organization

  6. D. Niche vs. Habitat • Niche • The role an organism plays in the environment (Its “job” in the community) • Habitat • Place where an organism lives Three Species of Warblers and their niches Cape May Warbler Feeds at the tips of branches near the top of the tree Bay-Breasted Warbler Feeds in the middle part of the tree Yellow-Rumped Warbler Feeds in the lower part of the tree and at the bases of the middle branches Spruce tree