PPT-Ecology 8310

Population and Community Ecology Metapopulations Levins model Mainlandisland model Withinpatch dynamics Source sink dynamics Closed population Births deaths N focal population. (LSU BIOL 4253, Sections 1 & 2, Spring 2015). Composite satellite image (“Blue Marble 2012”) from Wikimedia Commons. A312 Life Sciences Bldg.. kharms@lsu.edu. Dr. Kyle E. Harms. http://. www.kharms.biology.lsu.edu. (LSU BIOL 4253, Section 3, Fall 2015). Composite satellite image (“Blue Marble 2012”) from Wikimedia Commons. A312 Life . Sciences . Annex. kharms@lsu.edu. Dr. Kyle E. Harms. http://. www.kharms.biology.lsu.edu. Population (and Community) Ecology. Competition: the R* approach. Consumer and resource dynamics. A graphical approach. ZNGIs. Consumption vectors. Resource renewal. Putting it together. Tests. The basics:. Population (and Community) Ecology. The effects of diversity. Background. Tilman. and Downing 1994. Species vs. functional diversity. Foodwebs. (instead of primary producers only). Form of BES relationship. Population (and Community) Ecology. Predator-prey. Response to Thursday…. Empirical patterns:. Luckinbill's. experiments. Huffaker's. mites. Lake patterns in . phyto-zoop. as f(nutrients). Causes of positive increases in consumer-resource. 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.). Beyond two trophic levels. HSS 1960. Oksanen. et al. 1981. Control, Limitation, Regulation. Bottom-up vs. Top-down. Trophic cascades. Beyond two trophic levels…. Why is the world green?. Observation: Plants are abundant; thus…. 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. HW #1. Age-structured populations. Stage-structure populations . Life cycle diagrams. Projection matrices. Context: Sea . Turtle . Conservation. (But first … background). Population. Structure. :. Seguing into from populations to communities. Species interactions. Lotka-Volterra. equations. Competition. Adding in resources. Species interactions:. Competition (- , -). Predation (+ , -). (. Herbivory. 2018 ECOLOGY (B&C) KAREN LANCOUR National Bio Rules Committee Chairman karenlancour@charter.net C. Robyn Fischer National Event Supervisor Ecology Events Ecology – principles of ecology related to terrestrial environments – II. The Tenets of Deep Ecology While I am aware that the term deep ecology was coined by the Norwegian philosopher Arne Naess, this article refers specifically to the American variant.2 Adherents of