Download or read book Aquatic Synthesis for Voyageurs National Park written by and published by . This book was released on 2003 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt: Voyageurs National Park (VOYA) in northern Minnesota contains significant aquatic resources including 30 lakes and numerous wetlands. This synthesis contains an integrated account of what is known about the aquatic resources of VOYA; compares VOYA resources to those of other areas; and identifies opportunities and needs for future studies and surveys. Surveys and studies in VOYA have identified fifty-four fish species from 16 families 820 vascular plant species and 7 amphibian and 3 reptile species (higher numbers probably occur). Estimates of relative abundance for phyto- and zooplankton vary among VOYA lakes and depths surveyed. The VOYA fish populations and communities have been the most intensively studied. Twenty-eight percent of VOYA wetlands are the result of beaver activity. Mercury contamination and its food-chain bioaccumulation in VOYA are of particular concern. An integrated monitoring plan is needed in VOYA to provide continuous data and information on the complex physical chemical, and biological factors that influence aquatic systems. Resource managers in VOYA will use this information to understand and explain observed changes and to predict the potential for future changes.
Download or read book Final General Management Plan environmental Impact Statement and Visitor Use and Facilities Plan written by and published by . This book was released on 2001 with total page 516 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Draft General Management Plan environmental Impact Statement and Visitor Use and Facilities Plan written by United States. National Park Service and published by . This book was released on 2000 with total page 498 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Voyageurs National Park N P General Management Plan and Visitor Use and Facilities Plan Koochiching and St Louis Counties written by and published by . This book was released on 2000 with total page 496 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Department of State Appropriation Bill 1925 Hearings 68th Congress 1st Session written by United States. Congress. House Appropriations and published by . This book was released on 1924 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Department of State Appropriation Bill 1925 written by United States. Congress. House. Committee on Appropriations. Subcommittee on State Department Appropriations and published by . This book was released on 1924 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Department of State Appropriation Bill 1925 written by United States. Congress. House. Committee on Appropriations and published by . This book was released on 1924 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Departments of State and Justice the Judiciary and Related Agencies Appropriations Department of State Hearings Before the Subcommittee written by United States. Congress. House. Committee on Appropriations and published by . This book was released on 1924 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Outdoor Life written by and published by . This book was released on 1935 with total page 1176 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sports Afield written by and published by . This book was released on 1954 with total page 1614 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Beavers Boreal Ecosystem Engineers written by Carol A. Johnston and published by Springer. This book was released on 2017-08-28 with total page 303 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bridging the fields of ecosystem science and landscape ecology, this book integrates Dr. Carol Johnston's research on beaver ecosystem alteration at Voyageurs National Park. The findings about the vegetation, soils, and chemistry of beaver impoundments synthesized in the text provide a cohesive reference useful to wetland scientists, ecosystems and landscape ecologysts, wildlife managers, and students. The beaver, Castor canadensis, is an ecosystem engineer unequaled in its capacity to alter landscapes through browsing and dam building, whose population recovery has re-established environmental conditions that probably existed for millenia prior to its near extirpation by trapping in the 1800s and 1900s. Beavers continue to regain much of their natural range throughout North America, changing stream and forest ecosystems in ways that may be lauded or vilified. Interest in beavers by ecologists remains keen as new evidence emerges about the ecological, hydrological, and biogeochemical effects of beaver browsing and construction. There is a critical need for ecologists and land managers to understand the potential magnitude, persistence, and ecosystem services of beaver landscape transformation. The 88-year record of beaver landscape occupation and alteration documented by Dr. Carol Johnston and colleagues from aerial photography and field work provides a unique resource toward understanding the ecosystem effects and sustainability of beaver activity.
Download or read book The International Joint Commission written by Lawrence J. Burpee and published by . This book was released on 1915 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Indian Rock Paintings of the Great Lakes written by Selwyn Dewdney and published by University of Toronto Press. This book was released on 1962-12-15 with total page 321 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes in word and illustration the results of an exciting quest on the part of its authors to discover and record Indian rock paintings of Northern Ontario and Minnesota. Numerous drawings were made from these pictographs at a hundred different sites; the originals range in age from four to five hundred years to a thousand, and were done with the simplest materials: fingers for brushes, fine clay impregnated with ferrous oxide giving the characteristic red paint. Where an overhanging rock protected a vertical face from dripping water or on dry, naked rock faces the Indians recorded the forest life with which they lived in intimate association—deer, caribou, rabbit, heron, trout, canoes, animal tracks—and also abstractions which puzzle and intrigue the modern viewer. Many of the paintings could only have been done from a canoe or a convenient rock ledge. Selwyn Dewdney travelled many thousands of miles by canoe to make the drawings of the pictographs which illustrate every page of this fascinating and attractive book. He provides also a general analysis of the materials used by the Indians, of their subject-matter and the artistic rendering given to it, and his artist's journal records in detail the sites he visited, the paintings he found at each, the comparisons among them that came to mind, the references to rock paintings in early literature of the Northwest. Kenneth E. Kidd contributes a valuable essay on the anthropological background of the area, linking the rock paintings with early cave art in, for example, France and Spain, describing the life of the Indians in the Shield country, and commenting on what the pictographs reveal of their makers' attitudes to their external world and of their thinking. This is a book which will appeal to a wide audience: to those interested in primitive art forms and in Canadian art in general, to all students of the early history of North America, to travellers who in increasing numbers follow the canoe trails of the Shield lakes and rivers.
Download or read book Field and Stream written by and published by . This book was released on 1964 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fur Trade Canoe Routes Of Canada written by Eric W. Morse and published by . This book was released on 1979 with total page 99 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Reference World Atlas written by DK and published by Penguin. This book was released on 2013-10-01 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt: A beautifully clear, detailed, and fully revised and updated guide, DK's Reference World Atlas gives a superb overview of all the world's regions. Providing a detailed reference map set, the atlas also features computer-generated terrain-modeled maps and the landscapes, bringing an all-new dimension to cartography. This ninth edition of DK's respected Reference World Atlas includes all recent border, place name, and flag changes from around the world, including the emerging state of South Sudan.
Download or read book Charting the Inland Seas written by Arthur M. Woodford and published by . This book was released on 1991 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt:
