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Changes to Rangelands Over Time

Changes to Rangelands Over Time. Objectives. Identify and describe four factors that cause rangelands to change over time. Range Change Factors. Grazing Fire Invasive Species Weather/Climate Human Activities. Grazing. Removal of plant biomass »» plant response

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Changes to Rangelands Over Time

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  1. Changes to Rangelands Over Time

  2. Objectives • Identify and describe four factors that cause rangelands to change over time

  3. Range Change Factors • Grazing • Fire • Invasive Species • Weather/Climate Human Activities

  4. Grazing • Removal of plant biomass »» plant response • Important grazing considerations • Timing (season of use) • Intensity (stocking rate) • Duration • Species of grazing animal • Impacts of grazing • Positive vs. negative

  5. Fire • A natural process • Season of burning • Frequency • Fire resistance • Disturbance and Weed Invasion • Fire suppression • Impacts

  6. Invasive Species • Definition: “plants that are not native to a region that have been brought in either intentionally or unintentionally” • Invasive vs. weed • Response to disturbance • How do they increase? • Negative environmental impacts

  7. Weather/Climate • Most important factor in long-term changes to rangeland plant communities • Normal variation • Year-to-year (annual) • Long-Term • Drought • Impacts on plant composition

  8. Human Activities • Included development, recreation, subdivision • Humans affects other forces of nature • Invasion • Fire • Grazing • Climate/weather?

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