PPT-Extinction

Overview Extinctions are as important in the history of life as are the evolution of new species Explaining extinctions is just as challenging a scientific question as explaining the evolution of new species. Species Richness and the Extinction Crisis. How many species are there?. Species richness . – the total number of species in an area.. 5-10 million is best guess, but may be anywhere from 3-100 million.. ASTR 1420. Lecture. 9. Sections : 4.6, 6.4, 11.3. Mass Extinctions in the Earth History. Mass Extinctions. Check . http://en.wikipedia.org/wiki/Impact_event. http://en.wikipedia.org/wiki/Mass_extinction. AP Environmental Science. Mr. Grant. Lesson . 38. Objectives:. Define . the terms . extinction. , . extirpation. and . mass extinction. .. Contrast . background extinction rates and periods of mass extinction.. RESEARCH. q. uality and quantity. Paul Dowling. Institute of Education. University of London. Photometric . redshifts. can be routinely obtained to accuracies of better than 0.1 in Deltaz/(1 +. z. ). The issue of dust extinction, however, is one that has still not been well quantified. In this paper the success of two template-fitting photometric . The sixth . m. ass . e. xtinction. Objectives. Define . extinction.. Give examples of (1) past mass extinctions (2) and recent species . extinctions.. Compare current extinction rates with background extinction . Reconsolidation of . Amygdala. -Based Fear Memories: . A Newly Discovered Mechanism and its Implications for Exposure. Stefan G. Hofmann, Ph.D.. Michael W. Otto, Ph.D.. Elizabeth A. Phelps, Ph.D.. Bradford C. Richards, Ph.D.. Modern Extinctions. In the tropical Pacific, 154 species, mostly birds of large size, those that nested on the ground, and those that were flightless were the first casualties (Boyer 2008, 2009). In . ASTR 1420. Lecture . 9. Sections : 4.6, 6.4, 11.3. Mass Extinctions in the Earth History. Mass extinction . (a.k.a. extinction event) : is a sharp decrease in the number of species in a relatively short period of time.. Steve Ward, MA, BCBA. Whole Child Consulting, LLC. www.wholechildconsulting.com. http://. www.facebook.com. /. wholechildconsulting. Escape behavior is a problem. Escape/avoidance is the most common function of SIB (38.1%) (Iwata, et al, 1994). Essential Questions. What is extinction?. Which species have become extinct in modern times? . What are the characteristics of past mass extinctions? . How do modern extinction rates compare with natural (background) rates?. Zebra Mussel . Species Introduction. “Introduced . species are species that have become able to survive and reproduce outside the habitat where they evolved or spread . naturally.” . -. United States Environmental Protection Agency. Inclusive Education & Community Partnership. Kristin Hoefflin, MFT, BCBA. March 5, . 2014. Activity. How are Behaviors Established? . Behaviors serve a purpose (or function). When behaviors are reinforced, they increase. . . . Species. . A. . group of living organisms consisting of similar individuals capable of exchanging genes or interbreeding. .. Speciation. . It.  is the . evolutionary.  process by which populations evolve to become distinct . Good progress:. Define the term extinction. Explain how extinction may be caused.. Outstanding progress:. Explain that organisms become extinct because something changes and the species cannot adapt quickly enough to the new circumstances..