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The Niobrara
Although its history is etched on canyon walls reaching back twenty million years, the Niobrara is very much a river of today. Stretching 535 miles from its headwaters to the Missouri River, it is one of Nebraska?s least altered waterways and is designated as a national scenic river. Its waterfalls and wildlife make it a haven for outdoor enthusiasts, but pressures from development still threaten its scenic and ecological wonders. ø This first book-length study of the Niobrara is a comprehensive look at an ecological treasure. Paul A. Johnsgard reviews the river?s history from its geologic past through prehistoric settlement to the present and highlights its historical and biological featur...
From the Margins to the Centre
Papers presented at a conference held Mar. 2004, Mary Immaculate College, University of Limerick.
This Fragile Land
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 alm...
Biological Report
None
The Platte
Arising in two separate streams high in the Rockies and flowing east across the plains to meet the Missouri near Omaha, Nebraska, the Platte River is a microcosm of the geologic, plant, animal, and human worlds. Way station for the sandhill cranes, home of the Plains Indians, and artery for the great westward migrations of the nineteenth century, the Platte Valley offers a rich diversity of life and history. Focusing on the central role the Platte has played in shaping Nebraska and its heritage, both human and natural, Paul A. Johnsgard presents in this book a ?brief and personal portrait of the river as it has existed in the past and still exists today.? ø ?My special hope in doing so,? he...
Coloniality in the Cliff Swallow
Many animal species live and breed in colonies. Although biologists have documented numerous costs and benefits of group living, such as increased competition for limited resources and more pairs of eyes to watch for predators, they often still do not agree on why coloniality evolved in the first place. Drawing on their twelve-year study of a population of cliff swallows in Nebraska, the Browns investigate twenty-six social and ecological costs and benefits of coloniality, many never before addressed in a systematic way for any species. They explore how these costs and benefits are reflected in reproductive success and survivorship, and speculate on the evolution of cliff swallow coloniality. This work, the most comprehensive and detailed study of vertebrate coloniality to date, will be of interest to all who study social animals, including behavioral ecologists, population biologists, ornithologists, and parasitologists. Its focus on the evolution of coloniality will also appeal to evolutionary biologists and to psychologists studying decision making in animals.
Living with Aids
Provides children with information about the virus called HIV, what happens when one gets HIV and how one can cope with it.
