By L. Lee Grismer
The Baja California peninsula is domestic to many kinds of lifestyles chanced on nowhere else in the world. This, mixed with the peninsula's rugged and inaccessible terrain, has made the realm one of many final precise organic frontiers of North the United States. L. Lee Grismer is not just the most important authority at the amphibians and reptiles of Baja California, but in addition an exceptional photographer. He has produced the main entire paintings at the herpetofauna of the peninsula and its islands ever released. With its gorgeous colour photographs, specified bills of many little-known species, and outlines of the region's various setting, this is often the definitive consultant to the amphibians and reptiles of a desirable and distant region.The fruits of Grismer's region 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 e-book offers info at the id, distribution, ordinary background, and taxonomy of every species of amphibian and reptile stumbled on there. initial debts of the existence historical past of some of the salamanders, frogs, toads, turtles, lizards, and snakes are stated the following for the 1st time, and several other species that have been nearly unknown to technology are illustrated in complete colour. The booklet additionally comprises new information on species distribution and at the impact of the remoted panorama of the peninsula and its islands at the evolutionary strategy. a lot of the knowledge collected here's awarded in biogeographical overviews that examine the tremendous diverse environments of Baja California in either a modern and a historic framework. An unique and significant contribution to technology, this ebook will generate extra learn 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)
This is because the degree of aridity in this region begins to exceed their physiological capabilities and has altered the ecology of the environment. There are also some less obvious physiographic dispersal barriers within climatically homogeneous regions that play a signiﬁcant role in the local distribution of many species. One such barrier is a large volcanic ﬂow in the Lower Colorado Valley Region between Puertecitos and El Huerfanito. This ﬂow, which is approximately 28 km wide and of relatively recent origin, bisects what would otherwise be a generally ﬂat, narrow, sandy coastal desert plain extending south from San Felipe to Bahía San Luis Gonzaga.
Many species were widespread in northern Baja California, southwestern United States, and northwestern Mexico when northern Baja California existed as a western extension of mainland Mexico. Eventually the distribution of these forms was bisected by the northern extension of the newly forming proto–Gulf of California in the late Miocene to early Pliocene, when it extended at least as far north as Banning Pass in Riverside County, California. This separation prompted the formation of closely related forms on either side of the northern portion of the Gulf of California.
Species of this group enter Baja California along the Río Colorado and its tributaries. Some are strictly aquatic; others ﬁnd shelter and food in the vegetation along the watercourses or irrigation canals. None of the members of this group would occur in Baja California if it were not for these water sources. A Northern Transpeninsular Mesophilic Group contains species that are widespread in the mesic California and Baja California Coniferous Forest regions of the north; but as they extend south into the more arid regions of the peninsula, their distributions become highly fragmented and restricted to mesic refugia such as springs, oases, and mountaintops (Grismer 1988a, 1990a; Grismer and McGuire 1993; Grismer and Mellink 1994; Grismer et al.