PPT-Population Ecology What is a Population?

An interbreeding group of the same species living in the same general area may be distinguished by natural or arbitrary boundaries Population Density vs Dispersion the number of individuals per unit area or volume. Image from Wikimedia Commons. Global human population. United Nations . projections (2004) . (. red. , . orange. , . green. ). . U. S. Census Bureau modern (. blue. ) . & historical . (. black. ) . Chapter 4 Section 1. Levels of Ecological Organization. Ecologists study life at many levels.. Ecology is the study of how organisms interact with each other and their environments . . Individual Species/Organism. Chapter Overview Questions. What are the major characteristics of populations?. How do populations respond to changes in environmental conditions?. How do species differ in their reproductive patterns?. Photo of introduced (exotic) rabbits at “plague proportions” in Australia from Wikimedia Commons.. Life Cycle Diagram. 0. 1. 2. 3. 0.3. 0.8. 0. 2. 4. seed. 1 to 2 . yr. old . adult. 2. to 3 . yr. BIOL 7083. Community Ecology. Robert H. MacArthur:. Life, Work, and Legacy. Biographical Sketch. Robert H. MacArthur. April 2, 1930 – November 1, 1972. Personal Background. Born in Toronto, Ontario. Image from Wikimedia Commons. Global human population. United Nations . projections (2004) . (. red. , . orange. , . green. ). . U. S. Census Bureau modern (. blue. ) . & historical . (. black. ) . What is population?. Group of individuals of the same species that live in the same area. Does population change?. Sea otters, kelp, and sea urchins. Kelp forests offer a habitat for sea otters. Sea urchins feed on kelp. Population. ecology. Community. ecology. Ecosystem. ecology. Landscape. ecology. Global. ecology. Introduction to Ecology . Populations. Population ecology. Abundance. Dynamics . Density, dispersion, demographics, interrelationships with other populations. Natural Selection. This includes describing how organisms respond to the environment and how organisms are distributed.. Events that occur in the framework of . ecological time. (minutes, months, years) translate into effects over the longer scale of . damp, dark. raining, dripping, steaming. monkey, jaguar, frog, anaconda. climbing, stalking, slinking. furry scaled. endangered.. What is ecology?. Is this . I. Biotic and . Abiotic. Factors. A. Biotic Factors-- all living things that inhabit an environment. 1. relationships with organisms of the same or different species. . B. . Abiotic. Factors: The nonliving environment. 41:. Ch. 42:. Ch. 44:. Ecology. Ecology. : study of interactions between organisms and their environments – science of relationships, studied by ecologists. Abiotic . Factors:. non-living parts of an organism’s environment. Introduction to linking demography, population growth and extinction due to climate warming. What is Population Ecology? . Goal is to understand . factors. and . processes. that govern . abundance. SW: discuss with their groups how estimating a population could be used in a real world situation.. Population Ecology. Measuring a population. Growth Curves. Biotic Potential vs. Environmental. Resistance.