Marc A. Carrasco

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Estimates of paleodiversity patterns through time have relied on datasets that lump taxonomic occurrences from geographic areas of varying size per interval of time. In essence, such estimates assume that the species-area effect, whereby more species are recorded from larger geographic areas, is negligible for fossil data. We tested this assumption by using(More)
Using data from two palaeontological databases, MIOMAP and FAUNMAP (now linked as NEOMAP), we explore how late Quaternary species loss compared in large and small mammals by determining palaeospecies-area relationships (PSARs) at 19 temporal intervals ranging from c. 30 million to 500 years ago in 10 different biogeographical provinces in the USA. We found(More)
Earth has experienced five major extinction events in the past 450 million years. Many scientists suggest we are now witnessing a sixth, driven by human impacts. However, it has been difficult to quantify the real extent of the current extinction episode, either for a given taxonomic group at the continental scale or for the worldwide biota, largely because(More)
Data, whether images, measurements, counts, occurrences, or character codings, are a cornerstone of vertebrate paleontology. Every published paper, master’s thesis, and doctoral dissertation relies on these data to document patterns and processes in evolution, ecology, taphonomy, geography, geologic time, and functional morphology, to name just a few. In(More)
The Miocene Mammal Mapping Project (MIOMAP), a relational database of all published mammalian vertebrate localities between 30 and 5 million years old from the western United States, is now online for use by the paleontological community. The database is housed at the University of California at Berkeley, served through the Berkeley Natural History Museums,(More)
August 2005 | Volume 3 | Issue 8 | e286 | e281 According to folklore, Polynesians originated from a mythical homeland called Hawaiki. The existence of such a place, however, as well as its location, has been the subject of much speculation. Signifi cant research efforts have attempted to elucidate these claims through archeological, linguistic, and, more(More)
Leprosy is a highly prevalent, endemic disease in this country. Due to its long evolution, it gives rise to an extremely important social issue. This paper analyses the epidemiologic status of Leprosy in the municipality of Campinas. The epidemiologic framework indicates that control of leprosy communicants in Campinas remains inefficient, showing the need(More)
This paper traces the influence of F. W. Taylor and H. Fayol in the scientific output of brazilian nursing from 1930 to 1980. The scientific output of brazilian nursing is reviewed, looking for work based upon the Scientific and Classical Schools of Administration. The author executes a bibliographic survey based upon two periodicals: Revista Brasileira de(More)