Ecology Unit Chapters 55-59 Notes PART 1

Biology

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ECOLOGY UNIT AP BIOLOGY Ansh Guglani 2010 Ecology: the study of the introduction of organisms with their physical environment and each other. Typed and edited by: Ansh Guglani Biology Raven Johnson 8 th Chapters 55-59
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2 Ansh Guglani CIMATE FUNTIONAL OPERATION OF CELLS SMALLEST CIMATE N(#) b = birth rate d = death rate g = ²³ + ( ´ µ ) i = immigration e = emigration Definition: THE STUDY OF THE INTRODUCTION OF ORGANISMS WITH THEIR PHYSICAL ENVIRONMENT AND EACH OTHER. I. 4 Key Elements that determine which organisms can survive in a particular environment: - Temperature, water, sunlight, soil Provide environmental challenge that can be met in one of 2 ways: A. Homeostasis: organisms can maintain a steady-state internal environment regardless of external environment/use physiological, morphological and behavioral mechanisms B. Conformer: bodies adopting the temperature, salinity, and other aspects of their surroundings II. 6 Properties of Populations – members of the same species in same
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Unformatted text preview: place at same time; i.e. an interbreeding group/ primary unit of Ecological study A. Range: geographical distribution 1. Undergoes expansion and contraction 2. Adapted to range as a result of natural selection 3. Metapopulation: a network of interconnected populations; occur in areas in which suitable habitat is patchily distributed and is separated by intervening stretches of unsuitable habitat a. Source-Sink metapopulations: some areas are suitable for long-term habitat others are not b. Implications for the range of a species: -Occupy larger area -Prevent long-term extinction B. Growth Patterns / dynamics: the quantitative study of populations/ change in size through time 1. Exponential growth – simplest model (J-Shaped curve) a. Characteristics of small population with unlimited resources; lab cultures, colonizing species b. Per capita rate of increase, r, is a constant c. Growth rate, gG g± = ± rN , increases due to increase in # of individuals, N...
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Ecology Unit Chapters 55-59 Notes PART 1 - place at same...

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