Scott r abella (16 resultados)

paperback. Condición: Very Good. Connecting readers with great books since 1972! Used books may not include companion materials, and may have some shelf wear or limited writing. We ship orders daily and Customer Service is our top priority.

Condición: As New. Unread book in perfect condition.

Condición: New.

Condición: As New. Unread book in perfect condition.

Paperback. Condición: new. Paperback. Conserving America's National Parks shares the status of conservation challenges and successes in America's 408 national parks. Rising sea levels, collapses of coral reefs, loss of wildlife species, droughts, severe fires, non-native species, and climate change are among the many challenges defining contemporary conservation at the 100-year centennial of the National Park Service in 2016. However, thrilling outcomes of active conservation projects, such as the largest removal of river dams in U.S. history, provide hope for the future of parks. Written for readers with diverse backgrounds, Conserving America's National Parks is richly illustrated with 247 photos, maps, and sketches and supported by over 350 scientific literature citations. Conserving America's National Parks is unprecedented in its scope of conservation stories unfolding in America's national parks. Further information, including additional examples of the book's graphics and the author's contact information for discounts and bulk orders, is available on the book's website: Shipping may be from multiple locations in the US or from the UK, depending on stock availability.…

Condición: New.

Condición: New.

Condición: As New. Unread book in perfect condition.

Condición: As New. Unread book in perfect condition.

Condición: New.

Paperback. Condición: new. Paperback. Conserving America's National Parks shares the status of conservation challenges and successes in America's 408 national parks. Rising sea levels, collapses of coral reefs, loss of wildlife species, droughts, severe fires, non-native species, and climate change are among the many challenges defining contemporary conservation at the 100-year centennial of the National Park Service in 2016. However, thrilling outcomes of active conservation projects, such as the largest removal of river dams in U.S. history, provide hope for the future of parks. Written for readers with diverse backgrounds, Conserving America's National Parks is richly illustrated with 247 photos, maps, and sketches and supported by over 350 scientific literature citations. Conserving America's National Parks is unprecedented in its scope of conservation stories unfolding in America's national parks. Further information, including additional examples of the book's graphics and the author's contact information for discounts and bulk orders, is available on the book's website: Shipping may be from our Sydney, NSW warehouse or from our UK or US warehouse, depending on stock availability.…

Condición: New. Print on Demand.

Condición: New. Print on Demand.

Paperback / softback. Condición: New. This item is printed on demand. New copy - Usually dispatched within 5-9 working days.

Paperback. Condición: new. Paperback. Gambel oak (Quercus gambelii) is a key deciduous species in southwestern ponderosa pine (Pinus ponderosa) forests and is important for wildlife habitat, soil processes, and human values. This report (1) summarizes Gambel oak's biological characteristics and importance in ponderosa pine forests, (2) synthesizes literature on changes in tree densities and fire frequencies since Euro-American settlement in pine-oak forests, (3) suggests management prescriptions for accomplishing various oak management objectives (for example, increasing diameter growth or acorn production), and (4) provides an appendix containing 203 Gambel oak literature citations organized by subject. Nine studies that reconstructed Gambel oak density changes since settlement in the late 1800s reported that densities of small oaks have escalated, with increases ranging from 4- to more than 63-fold. A possible argument for passive oak management, that overall oak abundance has decreased, is not supported by published research. Manipulating oak growth forms is one of the main means for managing oak and ecosystem components affected by oak. Published research has classified variants of three basic oak growth forms: shrubby thickets of small stems, pole-sized clumps, and large trees. Burning and cutting constitute major prescriptions for manipulating these growth forms, whereas pine thinning has most consistently increased oak diameter growth for promoting large oaks. Because of their high ecological value, large, old oaks should be retained in any management prescription. Sufficient research has been published on which to base some oak management prescriptions, but additional research on poorly understood aspects of oak's ecology is needed to refine and improve oak management. This item is printed on demand. Shipping may be from our UK warehouse or from our Australian or US warehouses, depending on stock availability.…

Paperback. Condición: new. Paperback. Conserving America's National Parks shares the status of conservation challenges and successes in America's 408 national parks. Rising sea levels, collapses of coral reefs, loss of wildlife species, droughts, severe fires, non-native species, and climate change are among the many challenges defining contemporary conservation at the 100-year centennial of the National Park Service in 2016. However, thrilling outcomes of active conservation projects, such as the largest removal of river dams in U.S. history, provide hope for the future of parks. Written for readers with diverse backgrounds, Conserving America's National Parks is richly illustrated with 247 photos, maps, and sketches and supported by over 350 scientific literature citations. Conserving America's National Parks is unprecedented in its scope of conservation stories unfolding in America's national parks. Further information, including additional examples of the book's graphics and the author's contact information for discounts and bulk orders, is available on the book's website: This item is printed on demand. Shipping may be from our UK warehouse or from our Australian or US warehouses, depending on stock availability.…