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	Jack Sepkoski - Wikipedia, the free encyclopedia
		In 1970, Sepkoski received a B.S. degree, magna cum laude, from the University of Notre Dame, and a Ph.D. in geological sciences from Harvard University in 1977.
		From 1974 to 1978, Sepkoski taught at the University of Rochester.
		Sepkoski is perhaps best known for his global compendia of marine animal families and genera, data sets that continue to motivate a tremendous amout of paleobiological research, and for his three great marine evolutionary faunas.
	en.wikipedia.org /wiki/Jack_Sepkoski (245 words)

	Memorial: J. John Sepkoski, Jr.: A personal reflection Journal of Paleontology - Find Articles
		Jack sought to reassure me on many occasions, even fairly recently, that everyone has their own demons and self-doubts to fight if they are to be successful, and he helped me to fight mine.
		Jack showed me that there was actually a sense of pleasure to be felt in the eye-reddening experience of building a database: along the way, victories were won in uncovering data from a particularly obscure location or environmental setting, or even in typing all of the data into the computer for analysis.
		Jack's expertise with the Cambrian is well-known, but, on that trip, I was impressed both by his knowledge of modem tropical settings and his sheer joy at plodding through the mud of Florida Bay and snorkeling through the mangrove roots and reef tract.
	www.findarticles.com /p/articles/mi_qa3790/is_199909/ai_n8871109 (1040 words)

	Paleontologist J. John Sepkoski Jr., 1948-1999
		Sepkoski held visiting professorships at the California Institute of Technology in 1986 and at Harvard University in 1990 and 1991.
		In 1988, Sepkoski visited the University of California at Los Angeles as a senior fellow and lectured at the Polish Academy of Sciences, where he was elected a foreign member.
		Sepkoski is survived by his wife, Christine M. Janis of Providence, R.I.; his son, David Sepkoski of Minneapolis, Minn.; his father, Joseph J. Sepkoski of Sparta, N.J.; two sisters, Carol Sepkoski of Cambridge, Mass., and Diane Karl of Cedar Brook, N.J.; and his former wife, Maureen Meter of Chicago.
	www-news.uchicago.edu /releases/99/990504.sepkoski.shtml (942 words)

	Alpha diversity - Wikipedia, the free encyclopedia
		For example, Sepkoski produced a diagram showing the diversification of skeletonized marine invertebrate taxa.
		Jack Sepkoski a University of Chicago palaeontologist studied the fossil record and the diversity of life on Earth.
		Sepkoski, J.J. Jr, 1984, A kinetic model of Phanerozoic taxonomic diversity, III.
	en.wikipedia.org /wiki/Alpha_diversity (299 words)

	Nemesis
		Studies of the fossil record by Dave Raup and Jack Sepkoski shows that this was not an isolated event, but one of several mass extinctions that appear to occur on a regular 26 million year cycle.
		The vertical axis shows the "extinction rate." This was taken from the values given by Raup and Sepkoski for the percent family extinctions at each geologic boundary.
		The upper time series (labeled Total) is for Sepkoski's entire data set of 17,500 genera, whereas the lower "filtered" time series is for a subset of 11,000 from which genera confined to single stratigraphic intervals have been excluded.
	muller.lbl.gov /pages/lbl-nem.htm (1075 words)

	Alroy.html (Site not responding. Last check: 2007-10-31)
		One of Jack Sepkoski's greatest scientific contributions was his "Three Evolutionary Faunas" hypothesis of Phanerozoic marine diversification.
		Sepkoski's EF scheme assumes a similar pattern, with first a Cambrian and then a Paleozoic collection of groups being shaken out.
		Sepkoski's EF 3 includes several groups, but EF 1 is driven almost entirely by the rise and fall of Cambro-Ordovician trilobites.
	pjw3.fmnh.org /SepkoskiSymposium/Alroy.html (477 words)

	News in Science - A new history of life on Earth - 15/05/2001
		This flies in the face of the accepted history of life on Earth - that diversity of animal life in the 65 million years since the extinction of dinosaurs has increased dramatically and will continue to do so given the right environmental conditions.
		It seems, however, that validation for this long-held belief is based on a single set of data put together in the 1970s by University of Chicago scientist Jack Sepkoski.
		Though simple, the data were the best that could be gathered at the time, and processed by fledgling computers.
	www.abc.net.au /science/news/stories/s296919.htm (457 words)

	Nov 4
		Jack Sepkoski, a paleontologist at the University of Chicago, wanted to see if he could quantify all of this.
		Drawing together countless studies in the field, Sepkoski in 1993 published a gigantic database compiling the fossil records of some 40,000 genera, or families of species.
		For the first time science now had a comprehensive record, over the last 600 million years, of the flourishing and perishing of life on earth.
	www.mayyoubehappy.com /nov4.html (788 words)

	PALEOZOIC HISTORY (Site not responding. Last check: 2007-10-31)
		Jack Sepkoski has elaborated on our understanding of this pattern by doing numerical analuses that suggest two shortcomings of the old picture.
		Thus Sepkoski modified the old pattern a little by distinguishing three "Evolutionary Faunas" -- a "Cambrian", a "Paleozoic", and a "Modern" one.
		The diagram gives a summary of the types of organisms present in the three evolutionary faunas, along with some idea of their most frequent general ecological niches.
	itc.gsw.edu /faculty/bcarter/histgeol/history/phanlife.htm (335 words)

	The Daily Californian
		Kirchner's work utilizes a vast database of extinctions and species originations put together by University of Chicago statistician Jack Sepkoski, who compiled the data from hundreds of years worth of paleontology research.
		Kirchner used an astrophysical technique normally applied to deal with the varying visibility of events in outer space to connect the dots and discern the underlying trends of species death and replenishment contained in the database.
		When applied to the numerous species represented in the Sepkoski database, the considerable lag between a drop in biodiversity and the point at which that same level of diversity is replenished appears.
	www.dailycal.org /printable.php?id=7439 (633 words)

	Extinctions (Site not responding. Last check: 2007-10-31)
		The late University of Chicago paleontologist Jack Sepkoski patiently assembled records of thousands of species’ life histories.
		Plotting Sepkoski’s data on marine family numbers versus stratigraphic levels since the Cambrian 550 million years ago, we first notice that their number has been in nearly constant increase, even taking into account that recent fossils are easier to find.
		Next we note the existence of five dips, corresponding to the five major peaks of extinctions in the second graph, which also shows the spike of experimentation with body forms in the Cambrian.
	exobio.ucsd.edu /Space_Sciences/extinctions.htm (621 words)

	A new picture of life's history on Earth -- Newman 98 (11): 5955 -- Proceedings of the National Academy of Sciences
		Total number of genera as a function of time during the Phanerozoic, in the classic database of Sepkoski (2, 3).
		Sepkoski's database, although extensive and thorough, has a number of shortcomings.
		merely an artifact of biases in the Sepkoski database.
	www.pnas.org /cgi/content/full/98/11/5955 (1539 words)

	Bulletin of the American Philosophical Society Library, new series
		A central figure in recasting the practice of paleobiology in the 1970s and 1980s, Jack Sepkoski died at a tragically young age.
		A Harvard graduate, Sepkoski spent his career at the University of Rochester and University of Chicago, helping to consolidate the former as a paleontological hot bed in the 1970s and the latter as one of most vibrant programs of the 1980s and 1990s.
		His statistical analyses of the origination and extinction of species resulted in his "three fauna" hypothesis (postulating that the end of the Paleozoic and Mesozoic marked significant changes in faunal composition) and the identification of a statistically significant periodicity in the timing of mass extinction events.
	www.amphilsoc.org /library/bulletin/2002/newacqs.htm (1936 words)

	[No title]
		Michael Boulter is an evolutionary biologist at the University of East London and the director of the "Fossil Record 2" team, analyzing one of the largest extinction databases in Britain, Biodiversity on the Internet.
		He claims that Raup and Sepkoski were the first to challenge the slow order of evolution with their 26-million-year-old-extinction-periodicity database.
		He fails to mention again that Sepkoski was the first to put together a database to examine Phanerozoic extinctions.
	www.nhm.ac.uk /hosted_sites/pe/2003_2/books/extinc.htm (5340 words)

	Mendel Newsletter n.s. 11 (February 2002)
		A Harvard-educated paleontologist from the University of Chicago, Sepkoski exerted an enormous influence upon his field during the late 1970s and 1980s, becoming one of the principal exponents of the paleobiological renaissance and a promethean figure in introducing computer modeling to his peers.
		According to Sepkoski's analyses, every 26-30 million years the earth experiences an episode in which 65 to95% of its biota is killed off, a dramatic finding that reoriented paleontologists from conceiving of mass extinction events in isolation into searching for a common, periodic cause.
		Sepkoski's work has subsequently cross-fertilized with everything from theories about the extra-terrestrial causes of extinction (the "asteroid theory") to theories considering the interaction between causal and acausal factors in shaping the earth's evolutionary history.
	www.amphilsoc.org /library/mendel/2002.htm (10896 words)

	Fossil records show biodiversity comes and goes
		In a commentary on this research in that same issue of Nature, UC Berkeley professor of earth and planetary sciences, James Kirchner, stated, "It is often said that the best discoveries in science are those that raise more questions than they answer, and that is certainly the case here."
		Muller and Rohde discovered the 62 million year fossil diversity cycle after creating a computerized version of an exhaustive database compiled by the late University of Chicago paleontologist Jack Sepkoski.
		Entitled Compendium of Fossil Marine Animal Genera, Sepkoski's posthumously published database is the most complete reference available for the study of biodiversity and extinctions.
	www.eurekalert.org /pub_releases/2005-03/dbnl-frs031405.php (884 words)

	WagnerGottshall.html (Site not responding. Last check: 2007-10-31)
		Although Jack Sepkoski is best known for his construction and analyses of synoptic, global databases, he was also a pioneer in the emerging field of evolutionary paleoecology.
		Long before researchers began constructing a new generation of relational databases containing primary, subsidiary data tied to individual occurrences of taxa, Sepkoski routinely compiled such data for his analyses of onshore-offshore patterns in the diversification of evolutionary faunas.
		However, because much of these data were difficult to computerize in an accessible fashion at the time that Jack compiled them, they never played major roles in his analyses.
	pjw3.fmnh.org /SepkoskiSymposium/MillerConnolly.html (355 words)

	The Succession of Life in the Sea
		On the basis of statistical analysis of shelly marine fauna (which tend to be easily fossilized) Jack Sepkoski has found that marine mostly invertebrate communities can be broken down into three separate evolutionary faunas.
		These are shown in the following diagram (Sepkoski's original having been reproduced a number of times) in which each taxon is measured in terms of diversity (number of families):
		Redrawn from Sepkoski, J.J. Jr, 1984, "A kinetic model of Phanerozoic taxonomic diversity, III.
	academic.udayton.edu /MichaelSandy/succession_of_life_in_the_sea.htm (547 words)

	Cambridge Conference Correspondence
		Darwin and one of the last chapters is on Jack," Jablonski said.
		Sepkoski's taste in music was as unconventional as some of
		David Sepkoski went on to receive an M.A. degree from the University of Chicago and is a doctoral student in
	abob.libs.uga.edu /bobk/ccc/cc050599.html (2853 words)

	The Nemesis Theory by Sasha
		By examining the fossil record of marine fossils, Dave Raup and Jack Sepkoski have gathered data showing the statistical estimation of extinction as shown in the picture on the right.
		The arrows are plotted every 26 million years and as one can see, they correlate for the most part to the peaks of extinction.
		Evidence for the Nemesis Theory can also be found with the discovery of high concentrations of iridium which is only found in extraterrestrial objects such as comets.
	swanson.bol.ucla.edu (1601 words)

	Presentations and Speakers
		Sepkoski's data of diversity through time show dramatic drops in diversity (Figures 5.7, 5.11).
		Times of rapid extinction require us to ask whether some special extinction mechanism is at work, exactly the reverse of the questions that are raised by great evolutionary radiations.
		David Raup and Jack Sepkoski analyzed Sepkoski's data on the fossil record (Chapter 5).
	www.ucmp.berkeley.edu /education/events/cowen1a.html (1599 words)

	Jack's Stacks: May 1995
		Eldredge uses these to reveal a common thread in mass extinctions which he later applies to the present time.
		The most prominent paleontologists dealing with the causes of extinction are referred to quite often in these sections; most noted are David Raup, Steven Stanley, and Jack Sepkoski.
		The mass extinction most interesting to us at the end of the Ordovician, caused by glaciation and global cooling, was discussed.
	drydredgers.org /jack9505.htm (868 words)

	Anatomical and ecological constraints on Phanerozoic animal diversity in the marine realm -- Bambach et al. 99 (10): ...
		In a pioneering attempt to identify substructure in this diversity record (13), Sepkoski performed a factor analysis on
		Sepkoski used this idea to model the dynamics of faunal
		This paper began as a collaborative effort with the late Jack Sepkoski.
	www.pnas.org /cgi/content/full/99/10/6854 (4097 words)

	IN SHORT: NONFICTION - New York Times
		THE NEMESIS AFFAIR: A Story of the Death of Dinosaurs and the Ways of Science.
		In 1984 David M. Raup and his colleague Jack Sepkoski published a theory of periodic mass extinctions.
		Statistical analyses of fossil data suggested that the world has endured a Great Dying roughly every 26 million years.
	query.nytimes.com /gst/fullpage.html?res=9A0DE4DC1F39F930A3575BC0A960948260 (261 words)

	Bulletin of American Paleontology
		Anyone who has ever collected a Devonian fossil coral in New York or Michigan or Ontario or who is interested in coral evolution, will benefit from this beautifully illustrated work.
		The late Jack Sepkoski changed the field of paleontology by pioneering the use of compliations of taxonomic data to explore major patterns in the history of life.
		This volume makes publicly available for the first time Sepkoski's famous compliation of more than 37,000 genera of marine fossil animals.
	www.priweb.org /bookstore/info_BAP.html (317 words)

	Evolutionary Paleoecology: The Ecological Context of Macroevolutionary Change
		It is fittingly dedicated to Jack Sepkoski, who literally single-handedly reinvigorated the entire discipline of paleontology about 25 years ago by publishing large-scale trends in fossil data.
		The topics surveyed are not meant to be comprehensive; they touch on many of the kinds of questions about evolution and paleontology originally raised by Sepkoski.
		Although the focus is on invertebrate paleontology, both of the fossil-plant papers on terrestrial nutrients and ecological sorting of plant classes will become seminal papers for research paleobotanists.
	www.booksmatter.com /b0231109954.htm (262 words)

	Geotimes - June 2002 - Crisis in Collections
		For example, in 1992, E-an Zen, then president of the Geological Society of America, requested that the National Research Council consider geological collection issues.
		In 1996, Paleontological Society President Jack Sepkoski established a Collections Committee to advise the Society on issues such as the planned dispersal of the U.S. Geological Survey’s paleontological research collections.
		Later, concern over the disposal of oil company samples prompted the National Research Council to establish a panel to discuss collection issues (see also the first feature story).
	www.agiweb.org /geotimes/june02/feature_crisis.html (2087 words)

	Wokół ewolucji
		the past by the work of one man, Jack Sepkoski, who from the early eighties
		compiled by Alroy and coworkers (one of whom is the same Jack Sepkoski
		may be merely an artifact of biases in the Sepkoski database.
	www.jodkowski.pl /we/MNewman.html (1353 words)

	Chapter 6 Review
		What is Geerat Vermeij's ("gary vermay's") hypothesis for why there has generally been higher diversity of organisms in the sea since the Mesozoic Era, dubbed the "seafood" hypothesis more recently.
		David Raup and Jack Sepkoski analyzed patterns of extinctions large enough to qualify as "mass extinctions." List the six events they found from earliest to latest, and plot them (see p.
		What are some physical global phenomena that might act together to cause one of the six "mass extinction" events that have occurred since big bilaterian animals evolved?
	biology.fullerton.edu /life/hol/rq/rq6.html (436 words)

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