Download Cheatgrass: Fire and Forage on the Range by James A. Young PDF

By James A. Young

This can be a clinical and ancient account of the cheatgrass invasion. it's a learn of the plant which has replaced the ecology of thousands of acres of western rangeland.

Show description

Read Online or Download Cheatgrass: Fire and Forage on the Range PDF

Best environmentalism books

Green Networks. A Structural Analysis of the Italian Environmental Movement

Lines the expansion of the robust environmental flow in Italy. This paintings indicates that via networking, allegiances and pragmatic allegiances, person environmental teams in Italy were capable of shape a collective move which has been in a position to holiday into mainstream politics.

Kulturlandschaft und Naturschutz: Probleme-Konzepte-Ökonomie

Die Artenarmut der heutigen agrarischen Produktionslandschaft ist ein unumstrittener Fakt und wird vielfach beklagt. Zahlreiche Maßnahmen und beträchtliche Finanzmittel werden eingesetzt, um Abhilfe zu schaffen – mit zum Teil begrenztem Erfolg. Dieser Tatsache und ihren Ursachen wird im Buch auf den Grund gegangen.

A Line in the Tar Sands: Struggles for Environmental Justice

The struggle over the tar sands in North the USA is one of the epic environmental and social justice battles of our time, and one of many first that has controlled to marry really explicitly obstacle for frontline groups and rapid neighborhood risks with worry for the way forward for the whole planet. Tar sands “development” comes with an immense environmental and human rate.

Uncertain path : a search for the future of national parks

During this provocative strolling meditation, author and previous park ranger William Tweed takes us to California’s excellent excessive Sierra to find a brand new imaginative and prescient for our nationwide parks as they process their a centesimal anniversary. Tweed, who labored one of the Sierra Nevada’s large peaks and massive bushes for greater than thirty years, has now hiked greater than 2 hundred miles alongside California’s John Muir path in a private look for solutions: How will we handle the weather swap we're seeing even now—in melting glaciers in Glacier nationwide Park, altering wet seasons on Mt Rainer, and extra fireplace within the West’s iconic parks.

Additional info for Cheatgrass: Fire and Forage on the Range

Example text

The early Holocene assemblages of plants were descendants of those that remained after the wild climatic fluctuations of the Pleistocene. The fiveneedle pines that now grow near timberline on the highest mountains in the Great Basin, for example, grew during the Pleistocene glacial maxima on the beaches of the pluvial lakes. The vast and rapid plant migrations forced by the fluctuations in climate during and after the close of the Pleistocene opened plant communities to invasion by other species.

It should be no surprise that seeds of species that are considered weeds occurred together with the seeds of cultivated crops. Plants that could mimic the cultural requirements of the cereal grains were preadapted to be weeds in the fields of the earliest agriculturalists. They germinated at the same time as the cereal grains that were intentionally sown, completed their life cycle in the same amount of time, and produced seeds that were difficult to separate from the crop seeds. Wheat started as wild einkorn types and evolved through hybridization and polyploidy to the emmer wheats and then the modern bread wheats.

The other leaf type, smaller and more moisture efficient, remains on the plant for several seasons. Sagebrush blooms in the fall at the end of the summer drought, when the flowering stalks are extremely efficient at photosynthesis. Seedlings can produce seeds in their second year and continue to flower when they are more than a century old, when most of their cambium has been destroyed and their stems recline on the ground as twisted wrecks of weathered wood. Big sagebrush plants produce many more seeds each year than are necessary to maintain a stand at the density a particular site is capable of supporting.

Download PDF sample

Rated 4.99 of 5 – based on 17 votes