Contribution To The Herpetofauna Of The Venezuelan Guayana
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Contribution To The Herpetofauna Of The Venezuelan Guayana
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Author : Stefan Gorzula
language : en
Publisher:
Release Date : 1998
Contribution To The Herpetofauna Of The Venezuelan Guayana written by Stefan Gorzula and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with Amphibians categories.
Contribution To The Herpetofauna Of The Venezuelan Guayana
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Author : Stefan Gorzula
language : en
Publisher:
Release Date : 1998
Contribution To The Herpetofauna Of The Venezuelan Guayana written by Stefan Gorzula and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with Amphibians categories.
Herpetological Results Of The 2002 Expedition To Sarisarinama A Tepui In Venezuelan Guayana With The Description Of Five New Species
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Author : Cesar Barrio-Amoros
language : en
Publisher:
Release Date : 2008
Herpetological Results Of The 2002 Expedition To Sarisarinama A Tepui In Venezuelan Guayana With The Description Of Five New Species written by Cesar Barrio-Amoros and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with Amphibians categories.
Urumaco And Venezuelan Paleontology
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Author : Marcelo R. Sánchez-Villagra
language : en
Publisher: Indiana University Press
Release Date : 2010-07-16
Urumaco And Venezuelan Paleontology written by Marcelo R. Sánchez-Villagra and has been published by Indiana University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010-07-16 with Science categories.
Urumaco and Venezuelan Paleontology offers a synthesis of the paleontological record of Venezuela, including new discoveries on stratigraphy, paleobotany, fossil invertebrates, and vertebrates. Besides providing a critical summary of the record of decapods, fishes, crocodiles, turtles, rodents, armadillos, and ungulates, several chapters introduce new information on the distribution and paleobiology of groups not previously studied in this part of the world. Given its position in the northern neotropics, close to the Panamanian land bridge, Venezuela is a key location for understanding faunal exchanges between the Americas in the recent geological past. The book reviews the recent paleobotanical and vertebrate fossil record of the region, provides an understanding of Pleistocene climatic change and biogeography for the last few thousand years, and integrates new information with summaries of Spanish language works on Venezuelan geology and paleontology.
Proceedings Of The Academy Of Natural Sciences Vol 154 2005
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Author :
language : en
Publisher: Academy of Natural Sciences
Release Date :
Proceedings Of The Academy Of Natural Sciences Vol 154 2005 written by and has been published by Academy of Natural Sciences this book supported file pdf, txt, epub, kindle and other format this book has been release on with categories.
Alien Reptiles And Amphibians
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Author : Fred Kraus
language : en
Publisher: Springer Science & Business Media
Release Date : 2008-12-19
Alien Reptiles And Amphibians written by Fred Kraus and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008-12-19 with Nature categories.
Transportation of species to areas outside their native ranges has been a feature of human culture for millennia. During this time such activities have largely been viewed as beneficial or inconsequential. However, it has become increasingly clear that human-caused introductions of alien biota are an ecological disruption whose consequences rival those of better-known insults like chemical pollution, habitat loss, and climate change. Indeed, the irreversible nature of most alien-species int- ductions makes them less prone to correction than many other ecological problems. Current reshuffling of species ranges is so great that the present era has been referred to by some as the “Homogocene” in an effort to reflect the unique mag- tude of the changes being made. These alien interlopers often cause considerable ecological and economic d- age where introduced. Species extinctions, food-web disruptions, community alte- tions, ecosystem conversion, changes in nutrient cycling, fisheries collapse, watershed degradation, agricultural loss, building damage, and disease epidemics are among the destructive – and frequently unpredictable – ecological and economic effects that invasive alien species can inflict. The magnitude of these damages c- tinues to grow, with virtually all environments heavily used by humans now do- nated by alien species and many “natural” areas becoming increasingly prone to alien invasion as well. Attention to this problem has increased in the past decade or so, and efforts to prevent or limit further harm are gaining wider scientific and political acceptance.
The Summit Herpetofauna Of Auyantepui Venezuela
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Author : Charles W. Myers
language : en
Publisher:
Release Date : 2008
The Summit Herpetofauna Of Auyantepui Venezuela written by Charles W. Myers and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with American Museum-Terramar Expedition categories.
Auyantepui is an immense sandstone table mountain in the Venezuelan Guayana. This mesa did not appear on aviation maps and was unknown to the literate world prior to the late 1930s. It was explored from the air by Jimmy Angel, a bush pilot and colorful soldier of fortune for whom the world's highest waterfall is named (Angel Falls at the northern end of Auyantepui). About the same time, in 1937, Captain Félix Cardona Puig and Gustavo Heny discovered an access crack in the sandstone, allowing ascent onto the southern end of the mesa. The first scientific exploration followed immediately--the 1937-1938 Phelps Venezuelan Expedition of the American Museum of Natural History made the first zoological and general botanical collections. Today, no tepui other than the "Lost World" of Cerro Roraima is better known to the general public. The summit of Auyantepui has a known fauna of 24 species of amphibians and reptiles, including species added by the Robert G. Goelet American Museum-TERRAMAR Expedition in 1994. This expedition collected 16 species during a month of fieldwork in the dry season (February), in five camps at elevations of 1700-2100 m above sea level. All species known from the summit of Auyantepui are treated in this bulletin; illustrations where possible include tadpoles, bioacoustic spectrograms, and hemipenes. Four new species are described--two frogs (Hypsiboas angelicus, n. sp., Eleutherodactylus auricarens, n. sp.), a lizard (Arthrosaura montigena, n. sp.), and a snake (Atractus guerreroi, n. sp.). Arthrosaura montigena possesses a hemipenial character not previously described--an orifice (orificium) of unknown function, situated in the lobular crotch between the two lobes. Attention is called to a probably undescribed snake (Liophis "miliaris" sensu lato) from the nearby Gran Sabana. The herpetofauna of the Auyán summit comprises 12 families, 20 genera, and 24 species. This is compared with the known herpetofauna of the Chimantá massif, lying less than 50 km south-southeast of Auyantepui. Despite the proximity and similar dimensions, the summits of Auyantepui and Chimantá have in common only 11% of the combined number of species (4 of 36), 44% of the genera (11 of 25), and 62% of the families represented (8 of 13), showing that neighboring tepuis may have herpetofaunas very different from one another. Nonetheless, the adjacent mountains that constitute the more fragmented Chimantá massif are relatively close to one another and seem to have a unified herpetofauna.
Neotropical Diversification Patterns And Processes
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Author : Valentí Rull
language : en
Publisher: Springer Nature
Release Date : 2020-03-30
Neotropical Diversification Patterns And Processes written by Valentí Rull and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-03-30 with Science categories.
This book provides a comprehensive overview of the patterns of biodiversity in various neotropical ecosystems, as well as a discussion on their historical biogeographies and underlying diversification processes. All chapters were written by prominent researchers in the fields of tropical biology, molecular ecology, climatology, paleoecology, and geography, producing an outstanding collection of essays, synthetic analyses, and novel investigations that describe and improve our understanding of the biodiversity of this unique region. With chapters on the Amazon and Caribbean forests, the Atlantic rainforests, the Andes, the Cerrado savannahs, the Caatinga drylands, the Chaco, and Mesoamerica – along with broad taxonomic coverage – this book summarizes a wide range of hypotheses, views, and methods concerning the processes and mechanisms of neotropical diversification. The range of perspectives presented makes the book a truly comprehensive, state-of-the-art publication on the topic, which will fascinate both scientists and general readers alike.
Relict Species
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Author : Jan Christian Habel
language : en
Publisher: Springer Science & Business Media
Release Date : 2009-12-03
Relict Species written by Jan Christian Habel and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009-12-03 with Science categories.
Mankind has evolved both genetically and culturally to become a most successful and dominant species. But we are now so numerous and our technology is so p- erful that we are having major effects on the planet, its environment, and the b- sphere. For some years prophets have warned of the possible detrimental consequences of our activities, such as pollution, deforestation, and overfishing, and recently it has become clear that we are even changing the atmosphere (e. g. ozone, carbon dioxide). This is worrying since the planet’s life systems are involved and dependent on its functioning. Current climate change – global w arming – is one recognised consequence of this larger problem. To face this major challenge, we will need the research and advice of many disciplines – Physics, Chemistry, Earth Sciences, Biology, and Sociology – and particularly the commitment of wise politicians such as US Senator Al Gore. An important aspect of this global problem that has been researched for several decades is the loss of species and the impoverishment of our ecosystems, and hence their ability to sustain themselves, and more particularly us! Through evolutionary time new species have been generated and some have gone extinct. Such extinction and regeneration are moulded by changes in the earth’s crust, atmosphere, and resultant climate. Some extinctions have been massive, particularly those asso- ated with catastrophic meteoric impacts like the end of the Cretaceous Period 65Mya.
Mountains Climate And Biodiversity
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Author : Carina Hoorn
language : en
Publisher: John Wiley & Sons
Release Date : 2018-02-22
Mountains Climate And Biodiversity written by Carina Hoorn and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-02-22 with Science categories.
Mountains, Climate and Biodiversity: A comprehensive and up-to-date synthesis for students and researchers Mountains are topographically complex formations that play a fundamental role in regional and continental-scale climates. They are also cradles to all major river systems and home to unique, and often highly biodiverse and threatened, ecosystems. But how do all these processes tie together to form the patterns of diversity we see today? Written by leading researchers in the fields of geology, biology, climate, and geography, this book explores the relationship between mountain building and climate change, and how these processes shape biodiversity through time and space. In the first two sections, you will learn about the processes, theory, and methods connecting mountain building and biodiversity In the third section, you will read compelling examples from around the world exploring the links between mountains, climate and biodiversity Throughout the 31 peer-reviewed chapters, a non-technical style and synthetic illustrations make this book accessible to a wide audience A comprehensive glossary summarises the main concepts and terminology Readership: Mountains, Climate and Biodiversity is intended for students and researchers in geosciences, biology and geography. It is specifically compiled for those who are interested in historical biogeography, biodiversity and conservation.