By L. Lee Grismer

The Baja California peninsula is domestic to many sorts of lifestyles came across nowhere else on the earth. This, mixed with the peninsula's rugged and inaccessible terrain, has made the world one of many final actual organic frontiers of North the US. L. Lee Grismer isn't just the most important authority at the amphibians and reptiles of Baja California, but in addition a superb photographer. He has produced the main finished paintings at the herpetofauna of the peninsula and its islands ever released. With its wonderful colour photographs, distinctive bills of many little-known species, and outlines of the region's various atmosphere, this is often the definitive consultant to the amphibians and reptiles of a desirable and distant region.The end result of Grismer's zone century of fieldwork at the Baja peninsula and his exploration of a couple of hundred of its islands within the Pacific Ocean and the ocean of Cort?s, this ebook supplies details at the identity, distribution, typical historical past, and taxonomy of every species of amphibian and reptile discovered there. initial debts of the lifestyles heritage of a number of the salamanders, frogs, toads, turtles, lizards, and snakes are mentioned right here for the 1st time, and a number of other species that have been virtually unknown to technology are illustrated in complete colour. The e-book additionally includes new facts on species distribution and at the influence of the remoted panorama of the peninsula and its islands at the evolutionary method. a lot of the data collected this is offered in biogeographical overviews that contemplate the super various environments of Baja California in either a modern and a old framework. An unique and significant contribution to technological know-how, this ebook will generate extra study for years yet to come because it turns into a benchmark reference for either pros and amateurs.

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Extra resources for Amphibians and Reptiles of Baja California, Including Its Pacific Islands and the Islands in the Sea of Cortes (Organisms and Environments)

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At the Isthmus of La Paz, the Sierra la Giganta gently fades into the Magdalena Plain, which then extends east across the penin- There are three major types of habitat island in Baja California. The first is formed by rocky mountain ranges surrounded by broad, flat expanses of low-lying, sandy desert. These ranges offer refuge for saxicolous species, and the surrounding desert prevents immigration and colonization from adjacent rocky areas. There are three such mountain ranges in Baja California. -Mexican border, lie the Sierra los Cucapás and Sierra el Mayor.

In westcentral Baja California, two closely situated mountain ranges, the Sierra Vizcaíno and the Sierra Santa Clara, define the Vizcaíno Peninsula. The Sierra Vizcaíno lies northwest of the Sierra Santa Clara and extends southeast from near Punta Eugenia approximately 115 km into the Vizcaíno Desert. This mountain range is very poorly explored, and the Northern Chuckwalla (Sauromalus obesus) is the only saxicolous species currently known to occur there (Grismer et al. 1994). The Sierra Santa Clara, located approximately 50 km to the southeast, consists of seven closely spaced and eroding volcanic peaks.

Noticeably absent are the Granite Spiny Lizard (Sceloporus orcutti) and Lyre Snake (Trimorphodon biscutatus). Dispersal barriers prevent populations from extending their distributions from one locale to an adjacent one. They are usually the result of major physiographic features such as mountain ranges, but they may also be zones of ecological transition from one environmental region into another as a result of climate. An example of the former would be the northern Peninsular Ranges, which prevent species from dispersing from the Lower Colorado Valley Region into the California Region simply because they are unable to cross the mountains.

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