PPT-Effective Population Size

Evolution amp Biodiversity BIL 160 Fall 2019 N vs N e Census Population Size N of adult all individuals breeding or nonbreeding within a population This can be counted by observation. Image from Wikimedia Commons. Global human population. United Nations . projections (2004) . (. red. , . orange. , . green. ). . U. S. Census Bureau modern (. blue. ) . & historical . (. black. ) . Genetic Drift (and Inbreeding). DEVIATION. . from . Hardy-Weinberg Equilibrium. Indicates that . EVOLUTION. Is happening. 4 Major Evolutionary Mechanisms that alter allele frequencies in populations:. 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. Stephen J. Dinsmore. 1. and Douglas H. Johnson. 2. 1. Department of Natural Resource Ecology and Management, Iowa State University, Ames, IA. and. 2. USGS- Northern Prairie Wildlife Research Center, St. Paul, MN. By: Taylor Thomason. Heather Caldwell. Intro. In this project we observed the effect the cheetah population had on the springbok population. . We discovered that through this the correlation between the two is positively moderate.. 1.3. Starter. Recap:. Definitions of:. Population?. Abiotic. ?. Biotic?. Learning Objectives. State what factors determine the size of a population. Describe the . abiotic. factors that affect the size of a population. Image from Wikimedia Commons. Global human population. United Nations . projections (2004) . (. red. , . orange. , . green. ). . U. S. Census Bureau modern (. blue. ) . & historical . (. black. ) . Arc of the course. Intro. Biodiversity is important for ecosystem function. Many causes for the loss of biodiversity. Module 1 – population growth. Module 2 – habitat loss and protection. Module 3 - climate . Estimating Population Size. Integral part of population dynamics . Helps ecologists see changes over time. Estimating Mobile Organisms. How would you estimate a population of mice?. John . Sweka. USFWS – Northeast Fishery Center. Lamar, PA. What is the goal of fish habitat restoration efforts and partnerships?. To create more/better fish habitat. To enhance/recover/restore fish populations. Penny for your thoughts Take a sample of size 5 from the population Calculate p = the proportion of pennies minted in the 2000s Calculate the mean year of the pennies as well KEEP THIS DATA WHERE YOU CAN USE IT AGAIN! Important in evaluating the health of ecosystem:. Is organism threatened or endangered….need protection? Wolves. Over-running habitat….. Should Population be thinned ? Deer. Count Individuals. Best for stationary organisms. for . clinical. . trials. Dr Greg Fox. University. of Sydney, . Australia. Overview. Selecting a suitable study population to answer our research question: where? who’s in? who’s out?. Minimising.