This Fragile Land: A Natural History of the Nebraska SandhillsU of Nebraska Press, 1 янв. 1995 г. - Всего страниц: 256 The Nebraska Sandhills is the largest area of sand dunes in the western hemisphere, covering an area about as large as Vermont, New Hampshire, and Rhode Island combined. Unlike most dunes, the Sandhills region supports an astonishing variety of wildlife. Sixty million years ago the area lay submerged in a vast inland sea. As the land lifted and the waters receded, the sandhills were formed, built upon a sandy floor above a sandy basement. Paul A. Johnsgard's appreciation for the region includes its evolution, a process that continues today making a very special place, patiently shaped by water, wind, and time. Sometimes 450 feet higher than their sloping valleys, the hills themselves are almost entirely covered with plants that manage to survive on an unstable substrate and in a climate of merciless heat and cold. They provide homes and resting places for rare species and sustain the livelihoods of a remarkable variety of people. Though firmly established in science, this book is an extended love letter to the Sandhills region and its people, plants, and animals. Johnsgard is now in his third decade of research in the Sandhills. This Fragile Land lets others see what he sees, a land with a fascinating range of geological, biological, and ecological vistas. Paul A. Johnsgard is Foundation Professor of the School of Biological Sciences at the University of Nebraska-Lincoln. Widely published throughout the English-speaking world, he has become a foremost authority on ornithology and bird behavior. His thirty-three books include Birds of the Great Plains, The Platte, Birds of the Rocky Mountains, Those of the Gray Wind, and Diving Birds of North America, all available from the University ofNebraska Press. |
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Содержание
List of Tables | 7 |
Chapter | 14 |
Chapter Three | 24 |
Chapter Four | 34 |
Chapter Five | 46 |
Chapter | 56 |
Chapter Seven | 68 |
Chapter Eight | 92 |
34 | 151 |
Time Scale of Cenozoic Events in North America | 159 |
Distributional Checklist of Sandhills Birds | 175 |
Central Sandhills Vascular Plant Taxa | 195 |
46 | 200 |
Vernacular and Scientific Names of Plants and Animals | 205 |
Glossary | 225 |
235 | |
Chapter Nine | 104 |
I | 113 |
Chapter | 116 |
2 | 120 |
Chapter Eleven | 134 |
Chapter Twelve | 148 |
239 | |
56 | 247 |
249 | |
253 | |
Часто встречающиеся слова и выражения
abundant spring acres alkaline American April to early aquatic aquifer associated barn swallows birds bluestem Brown County center-pivot Cherry County cliff swallows Common spring Common to abundant early October early September early to mid-May eastern ecological fall migrant flycatcher Forest grasses Grasshopper sparrow grassland groundwater habitat hectares irrigation Keith County Keya Paha lakes late April late September Lincoln Counties male mammals marsh meadows meters mid-April mid-September migrant and widespread Nebraska Sandhills nesting Niobrara Valley Northern occasional spring Occasional to rare Ogallala Ogallala aquifer overwintering migrant percent permanent resident Pine Ridge plants Platte Valley pondweed post-1960 breeding records prairie sandreed rare spring records for Cherry records for Keya River Sandhills counties Sandhills region sandpiper Sheridan species spring and fall Total typical Uncommon to occasional Uncommon to rare Univ upland Upland sandpiper vegetation vireo warbler western grebes Western meadowlark western Sandhills wetlands widespread breeder
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