Download or read book Land Bridges written by Alan Graham and published by University of Chicago Press. This book was released on 2018-03-30 with total page 335 pages. Available in PDF, EPUB and Kindle. Book excerpt: Land bridges are the causeways of biodiversity. When they form, organisms are introduced into a new patchwork of species and habitats, forever altering the ecosystems into which they flow; and when land bridges disappear or fracture, organisms are separated into reproductively isolated populations that can evolve independently. More than this, land bridges play a role in determining global climates through changes to moisture and heat transport and are also essential factors in the development of biogeographic patterns across geographically remote regions. In this book, paleobotanist Alan Graham traces the formation and disruption of key New World land bridges and describes the biotic, climatic, and biogeographic ramifications of these land masses’ changing formations over time. Looking at five land bridges, he explores their present geographic setting and climate, modern vegetation, indigenous peoples (with special attention to their impact on past and present vegetation), and geologic history. From the great Panamanian isthmus to the boreal connections across the North Atlantic and North Pacific Oceans that allowed exchange of organisms between North America, Europe, and Asia, Graham’s sweeping, one-hundred-million-year history offers new insight into the forces that shaped the life and land of the New World.

Download or read book Arctic Research of the United States written by and published by . This book was released on 1997 with total page 706 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Final Environmental Statement s on Proposed National Parks Monuments Wildlife Refuges Etc Alaska Arctic National Wildlife Refuge written by United States. Department of the Interior. Alaska Planning Group and published by . This book was released on 1974 with total page 696 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Air Pollution and Its Impacts on U S National Parks written by Timothy J. Sullivan and published by CRC Press. This book was released on 2017-02-03 with total page 565 pages. Available in PDF, EPUB and Kindle. Book excerpt: A variety of air pollutants are emitted into the atmosphere from human-caused and natural emissions sources throughout the United States and elsewhere. These contaminants impact sensitive natural resources in wilderness, including the national parks. The system of national parks in the United States is among our greatest assets. This book provides a compilation and synthesis of current scientific understanding regarding the causes and effects of these pollutants within national park lands. It describes pollutant emissions, deposition, and exposures; it identifies the critical (tipping point) loads of pollutant deposition at which adverse impacts are manifested.

Download or read book Rare Vascular Plants of Alberta written by The Alberta Native Plant Council and published by University of Alberta. This book was released on 2001-09 with total page 532 pages. Available in PDF, EPUB and Kindle. Book excerpt: This exhaustively researched project brings together for the first time a complete listing of Alberta's rare vascular plants with detailed plant descriptions, habitat information and notes of special interest. Accompanied by numerous colour photographs, B&W illustrations and frequency maps, this text is essential for naturalists, botanists, students, and others interested in the flora of Alberta.

Download or read book A Fragile Beauty written by Theodore Catton and published by . This book was released on 2010 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Glacier Bay National Park N P and Preserve Vessel Quotas and Operating Requirements written by and published by . This book was released on 2003 with total page 594 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Information Industry Directory written by and published by . This book was released on 2009 with total page 718 pages. Available in PDF, EPUB and Kindle. Book excerpt: Comprehensive directory of databases as well as services "involved in the production and distribution of information in electronic form." There is a detailed subject index and function/service classification as well as name, keyword, and geographical location indexes.

Download or read book The Circumpolar Plants written by Eric Hultén and published by . This book was released on 1962 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Field Guide to Forest Plants of South central Colorado written by David C. Powell and published by . This book was released on 1987 with total page 299 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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Download or read book Invasiveness Ranking System for Non native Plants of Alaska written by and published by . This book was released on 2008 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: Describes a ranking system used to evaluate the potential invasiveness and impacts of 113 non-native plants to natural areas in Alaska. Species are ranked by a series of questions in four broad categories: ecosystem impacts, biological attributes, distribution, and control measures. Also included is a climate screening procedure to evaluate the potential for establishment in three ecogeographic regions of Alaska [Juneau, Fairbanks, Nome].

Download or read book Invasive plants of Alaska written by and published by Government Printing Office. This book was released on 2005 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt: NOTE: NO FURTHER DISCOUNT FOR THIS PRODUCT -- Significantly reduced price -- Overstock List Price Describes invasive, non-native plants moving into Alaska.

Download or read book Alaska s Tundra and Wildlife written by Robin Dublin and published by . This book was released on 2001-01-01 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt: Covers elements of alpine and lowland ecosystems, the role of wind, cold, snow and permafrost, animal and plant survival techniques, tundra food chains and food webs, the fragility and resistance of plants, animals and the land, and conservation issue investigations.

Download or read book Kongl Vetenskaps Academiens handlingar written by and published by . This book was released on 1962 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Draft Environmental Impact Statement Cumulative Impacts of Mining written by and published by . This book was released on 1989 with total page 558 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book National List of Plant Species that Occur in Wetlands written by Porter B. Reed and published by . This book was released on 1988 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: