PPT-Ecology 8310 Population (and Community) Ecology

HW 1 Agestructured populations Stagestructure populations Life cycle diagrams Projection matrices Context Sea Turtle Conservation But first background Population Structure . Image from Wikimedia Commons. Global human population. United Nations . projections (2004) . (. red. , . orange. , . green. ). . U. S. Census Bureau modern (. blue. ) . & historical . (. black. ) . holism. reductionism. climax community. Organicism. teleology. deep ecology. Gaia theory . positive versus negative biotic interactions. pristine myth. Films often portray organisms and ecological interactions . Population Characteristics. Density. - # of individuals per unit of . area. Determined by…. counts . sample size estimate . indirect indicators . mark-recapture. Dispersion. In short, . ecology . is the scientific study of the . interactions of organisms with their environment. .. All organisms . interact. with other organisms in their surroundings and with the nonliving portion of their environment. . Patch selection (e.g., Marginal Value Theorem). Prey selection (optimal diet theory). Moving beyond feeding (energy intake): predation risk. . (u/g). Patch selection. :. Consider a forager moving among many patches during a foraging bout (rodent among seed caches, pollinator among flowers, etc.). Patch selection (e.g., Marginal Value Theorem). Prey selection (optimal diet theory). Moving beyond feeding (energy intake): predation risk. . (u/g). Patch selection. :. Consider a forager moving among many patches during a foraging bout (rodent among seed caches, pollinator among flowers, etc.). Predator-prey theory. Basics (. Lotka-Volterra. ). Functional responses and risk. Effect on phase-planes. Dynamics. Paradox of enrichment. Predator interference and ratio dependence. How do predators respond to prey?. Context. Context. What accounts for the distributional limit?. d. ispersal (perhaps with . Allee. effects). b. iotic and abiotic factors. If environmental factors, then:. λ. (N≈0) > 1 within distribution. 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. Developers have . approved a project that . will permanently reduce . the primary producers’ . biomass by 50% and remove all rabbits and deer. Which of the following is the most likely result at the completion of the project?. Seguing into from populations to communities. Species interactions. Lotka-Volterra. equations. Competition. Adding in resources. Species interactions:. Competition (- , -). Predation (+ , -). (. Herbivory. 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. 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. What is a population and how do ecologists study it. Explain . the difference between a niche and . habitat. Explain the predator/prey . relationship and carrying . capacity on the graph. . Explain why animals fight.