Biology 2, Lecture 1: Evolution by Natural Selection

Community - Aquatic Science with Dr. Rudy Rosen Lesson 5 includes: What are some of the basic survival needs of all living things? What is a population? What is a community? What is habitat? Why is it important? Why must organisms compete for resources? What is carrying capacity? What is a niche? Why is it important? What are invasive species? Why are they a problem? What is the source of energy for aquatic communities? How does energy circulate among organisms in an aquatic community? What is a food chain? What is a food web? What is an energy pyramid? What is a trophic level? How do predator and prey species keep species populations in balance in aquatic communities? What is natural selection? In what ways might food webs, food chains, and predator-prey relationships be different in a pond, an estuary, and the Gulf of Mexico? What happens when one piece is altered or removed? Aquatic Science with Dr. Rudy Rosen is an on-line video curriculum arranged into 13 lessons in YouTube Playlists that follows the contents of Dr. Rosen’s recently published textbook, Texas Aquatic Science. The textbook is published by the Texas A&M University Press and can be obtained at any online bookseller or from the publisher here: http://www.tamupress.com/product/Texas-Aquatic-Science,7918.aspx Each lesson covers a major subject area and is broken down into short sub-topic video presentations. These short videos covering important aquatic science topics can be used by students, instructors in building their own aquatic science curricula, or by life-long learners for self-education. The comprehensive teaching guide and enhancements can be downloaded FREE here: https://tpwd.texas.gov/education/resources/aquatic-science The instructional website is here: http://texasaquaticscience.org/ Dr. Rudy Rosen is a university professor and director of the Institute for Water Resources Science and Technology at Texas A&M University in San Antonio and is a Fellow of the Meadows Institute for Water and the Environment at Texas State University. His bio is here: http://texasaquaticscience.org/rudolph-rosen-author-editor-texas-aquatic-science/ Aquatic Science is a cooperative education project sponsored by The Meadows Center for Water and the Environment at Texas State University, Harte Research Institute for Gulf of Mexico Studies at Texas A&M University-Corpus Christi, Texas Parks and Wildlife, and the National Science Foundation Research Coordination Network for Climate, Energy, Environment and Engagement in Semiarid Regions (NSF-CE3SAR). Additional funding was provided by the Ewing Halsell Foundation and the US Fish and Wildlife Service Sport Fish Restoration Program. Some materials were adapted from or provided by the Missouri Department of Conservation.

This is a lecture on the history of population genetics, with an emphasis on the Hardy-Weinberg Principle, and leads to the variety of selection methods that occur during natural selection.