BIOL 152 1st Edition Lecture 30 Outline of Last Lecture I Niches a Fundamental vs realized b Effects of overlapping species II Other species interactions a Mutualism vs antagonism b Predation c Trophic levels III Populations a Definition b Factors affecting population size c Population distributions IV Ecological succession Outline of Current Lecture I Integrating evolution and ecology a Definitions b Synthesis II Reviewing the history of life on earth a Adapting to a life on land b The role of extinction i The impact of mass extinctions III The Anthropocene a Humans dominate the earth b Climate change c Our current mass extinction i Data from recent research d Meeting the challenge Current Lecture The Anthropocene one species dictates planetary change Clicker questions What is biological evolution Change in allele frequency over time These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute What is the unit of evolution Population evolution acts to change gene frequencies in populations What is ecology Interaction of organisms to each other and to the environment How does ecology relate to diversity Genetic variations colonize novel habitats Lamarck theory proved wrongs through understanding of acquired traits ex Losing a limb does not mean your offspring will be missing a limb Recalling history of life on Earth First life 3 billion years ago Prokaryotes own earth for one billion years First eukaryote 2 billion years ago Archaea clear bridge to eukaryotes First multicellularity 700 million years ago All aquatic First land dweller 450 million years ago PerspectivesDiversity of life 1 9 million species named by us More to discover Extinction Normal component of evolution Originate and go extinct o Average lifespan of mammal species 1 million years Mass extinction o Catastrophic events Pattern of mass extinction Irregular in time Most attributed to climate change The anthropocene Current era One species dominates Massive population growth 48 1 Influencing ecology of planet o Invasive species 48 20 Global Warming 48 5 o Causing mass extinction o Extinction risks from climate change are accelerating o Temperature increases extinction rate increases o Response move adapt or perish Climate change and deforestation 48 19
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