Lecture_Study_Guide_for_Exam_3 - Lecture Study Guide for...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Lecture Study Guide for Exam 3 Rangelands Rangelands are grassland ecosystems used to graze domesticated livestock Rangeland degradation - causes Ruminants Cattle - massive use of grain and water resources Rangeland forage - forbs, sedges, rushes, and grasses Rangeland vegetation adaptations, roots, fire resistance Metabolic reserve Decreasers, increasers, invaders Grazing pressure - type of animals, number of animals, duration of grazing, and trampling Defoliators - overgrazing historically prevented by predation, disease, and movement across the grasslands Fire and drought are important natural disturbances Natural + human disturbances (hunting, development…) can degrade rangelands Carrying capacity - maximum sustainable density of grazers, varies with season, range condition, … Animal Unit Month - AUM Rangeland condition assessed with several metrics, % native plants, % production potential, … Historic rangeland community in the western U.S. Completion of the transcontinental railroad in 1869, huge changes in western grazing
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This document was uploaded on 10/27/2011 for the course RNR 1001 at LSU.

Page1 / 2

Lecture_Study_Guide_for_Exam_3 - Lecture Study Guide for...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online