Rangelands - Rangelands Rangelands Compromised by...

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Rangelands
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Rangelands Compromised by overgrazing and desertification
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Overgrazing Original “Tragedy of the Commons” 1. Plants grazed with insufficient recovery time 2. Plants draw on stored energy in roots 3. Roots die back 4. soil porosity decreases (water- holding capacity of soil decreases – compaction increases
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Overgrazing Results Soil make-up destroyed Lower biodiversity Increased erosion Cattle trample riparian areas Increased siltation in streams Eutrophication increases (cattle wastes) Increased plant diseases Sustainability threatened
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Desertification Conversion of marginal rangeland or cropland to a more desert-like land type Soil erosion Prolonged drought Climate changes Overuse of resources
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Desertification Results Animals eating all available plant life Rain washes away trampled soil – (no roots to hold soil in place) Wells, springs, and other sources of water dry up (water run-off occurs too quickly and doesn’t replenish groundwater) Ground becomes unsuitable for seed germination Salinization
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Rangelands - Rangelands Rangelands Compromised by...

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