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    Introduction to the Natural History of Southern California
    Introduction to the Natural History of Southern California
    Introduction to the Natural History of Southern California
    Ebook138 pages1 hour

    Introduction to the Natural History of Southern California

    By Edmund C. Jaeger and Arthur C. Smith

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    About this ebook


    LanguageEnglish
    PublisherUniversity of California Press
    Release dateDec 22, 2023
    ISBN9780520330870
    Introduction to the Natural History of Southern California
    Author

    Edmund C. Jaeger

    Enter the Author Bio(s) here.

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      Book preview

      Introduction to the Natural History of Southern California - Edmund C. Jaeger

      California Natural History Guides: 13

      INTRODUCTION

      TO THE

      NATURAL HISTORY

      OF

      SOUTHERN CALIFORNIA

      BY

      EDMUND C. JAEGER

      AND

      ARTHUR C. SMITH

      ILLUSTRATIONS BY GENE M. CHRISTMAN

      UNIVERSITY OF CALIFORNIA PRESS

      BERKELEY, LOS ANGELES, LONDON

      UNIVERSITY OF CALIFORNIA PRESS

      BERKELEY AND LOS ANGELES

      UNIVERSITY OF CALIFORNIA PRESS, LTD.

      LONDON, ENGLAND

      © 1966 BY THE REGENTS OF THE UNIVERSITY OF CALIFORNIA

      ISBN: 0-520-03245-4 (CLOTHBOUND)

      0-520-00601-1 (PAPERBOUND)

      LIBRARY OF CONGRESS CATALOG NUMBER 65-27936

      PRINTED IN THE UNITED STATES OF AMERICA

      CONTENTS

      CONTENTS

      INTRODUCTION

      PHYSICAL DESCRIPTION

      CLIMATE

      THE SEASONS

      THE PLANT WORLD

      THE ANIMAL WORLD

      NAMING PLANTS AND ANIMALS

      LIFE ZONES AND BIOTIC COMMUNITIES

      BIOTIC COMMUNITIES OF SOUTHERN CALIFORNIA

      THE COMMUNITY OF NATURE

      NATURE ACTIVITIES

      MUSEUMS, ZOOS, AND BOTANICAL GARDENS

      WHERE TO OBTAIN HELP

      SUGGESTED REFERENCES

      INDEX

      INTRODUCTION

      By nature man is a creature of curiosity. Especially is this true in childhood. If this curiosity, the continual desire to name and to know the nature of things, is allowed to develop freely, and satisfaction is found in gaining further knowledge, this seeking spirit is more alive than ever when adulthood comes.

      The purpose of this series of Southern California Natural History Guides is to help us organize our thinking about birds, common and uncommon weeds, the flowers of the field, the trees of streamside and mountain. Many kinds of insects and spiders will be named, the mammals and reptiles identified, as well as the strange and beautiful creatures of the sea, and their habits described. It is hoped that many will be stimulated to make original discoveries and thus add to our scientific knowledge.

      With your Southern California Natural History Guides in hand, you will wish to explore the beaches, the mountains, and the desert, even your backyard garden and the neighboring vacant lots and fields. Through such excursions you become self-entertaining and do not need to spend money to hire others to entertain you. The money thus saved can be spent on books and film for your camera or for travel to far places.

      It has been truly said that you know only the ground over which you have walked. The automobile is most useful when it takes us to new and otherwise inaccessible places where we may get out and walk, take time to listen to the entrancing sounds of the outdoor world, and let the creatures of nature move about us without fear. Then we use our noses as aesthetic organs to bring to us the woodsy odors of the forest or the tangy smells of sagebrush and creosote bush. It is good to watch the slow-moving and colorful creatures of the tidepools or the graceful fight of sea birds. As we roam the earth on foot, we become intimately acquainted with rocks and minerals, note the varied forms of the land and the contrasting colors of moving clouds against a background of the bright blue heaven. At night we appreciate anew the majesty of the many-starred sky.

      Because the southern California guides are well illustrated with photographs, drawings, and charts, you will be able to identify and name many heretofore unfamiliar things. It is better to know the scientific name of an animal, plant, or rock, for it is more exact than the common name and is the one used by people the world over. After all, scientific names cast in Latin form are little more difficult to remember than common names if we know their origin and literal meanings and use them often enough.

      This first volume of the Southern California Natural History Guide Series provides an introduction to the large and diversified southern California region, its physical features, climate, and seasons. Following this are informative statements on plants and animals and their interrelationships. A special section deals with biotic communities, tells where characteristic plants and animals may be found, and suggests field trips to acquaint the seeker with living things in their natural environments. Museums and organizations concerned with natural history and the conservation of natural resources are listed, along with references to books, journals, and magazines which will be helpful in further study.

      PHYSICAL DESCRIPTION

      The name southern California is arbitrarily used here to designate the arid parts of the state from San Luis Obispo County southward to the Mexican border and eastward to Death Valley and the Colorado River. The southernmost Sierra Nevada is not included. Other volumes of this series may vary in the exact geographic area covered.

      Southern California comprises oceanic islands, seashore, coastal plains, great inland valleys, and internally drained basins with east-west and north-south dissected mountain ranges between. There are many low hills, some isolated, others seemingly buttressing the mountains. The northward islands owe their existence to subsidence of the western end of the east-west directed Santa Monica Mountains.

      Between the mountains and the sea, the coastal plain varies from rather wide to narrow, sometimes extending inland and cut across by a few small streams, such as the Santa Inez, Santa Clara, Ventura, Los Angeles, Santa Ana, and San Luis Rey rivers. Most of the larger valleys and some of the upland slopes are devoted to argriculture and urban development

      Much of San Diego County, except for a rather narrow strip of marine terraces and geologically young mesa lands along the ocean, consists of chaparral- and oak-covered hills and mountains dissected and entrenched by dendritic arroyos, sometimes containing small streams, many of them dry in summer. These brush-covered hills and mountains, rising higher and higher toward the east, culminate in elevated areas where scattered forests of live and décidons oaks, Incense Cedar, Yellow Pine, Sugar Pine, and other coniferous trees grow. Mount Palomar is 6,158 feet high; Cuyamaca Mountain, with an elevation of 6,515 feet, is the highest point in the county. This part of the Peninsular Province mountain mass is still being uplifted. The Palomar, Vulcan, and Laguna mountains are thought to be upraised fault blocks.

      The mountains comprising the east-west trending Transverse Ranges are the Santa Inez, Santa Monica, San Gabriel, San Bernardino, and Little San Bernardino mountains. Southward from these are the northsouth oriented Peninsular Mountains made up of the San Jacinto, Santa Rosa, Laguna, Vallecito, and outlying detached Santa Ana mountains. The Peninsular Mountains extending southward make up the backbone of the peninsula of Baja California.

      North of the Transverse Ranges lies the vast arid Mojave Desert, and east of the Peninsular Ranges is the barren Colorado Desert of lower elevations, a depressed block of the earth’s surface characterized by deep alluvial soils, old beach lines, and salt deposits of ancient Lake Cahuilla.

      The Mojave Desert is dominated by many north- and south-dissected hills and low mountains between which are broad basins having no drainage outlet to the sea. Excess storm waters flowing into them cause the formation of clay- or salt-surfaced dry lakes or salt pans, which may be covered at times by shallow sheets of water.

      The Colorado Desert trough contains the present below-sea-level Saltón Sea. Its ancestral waters may once have been connected with the Gulf of California. The area is now isolated from the sea by a low bar of silt at the mouth of the Colorado River. The lowest parts of the Saltón depression have several times been temporarily filled with fresh water from the river, the last time in 1905 and 1906. The dissolving of accumulated salts on its ancient floor has

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