Relationship between overgrazing and desertification pictures

Soil Erosion Due Overgrazing Leading Desertification Stock Photo (Edit Now) - Shutterstock

relationship between overgrazing and desertification pictures

Pastoralism is an ancient form of self-provisioning that is still in wide use today While many pastoral regions are the focus of current desertification studies, the long Overgrazing of plants, combined with the adverse effects of bare soil and .. Bassett TJ, Crumney D: Contested images, contested realities: Environment. Photographs of (a) land clearing to the edge of a small estuary draining into the The effect of deforestation on estuaries is much more rapid in the tropics than in .. Links to a Wildlife News blog by Ralph Maughan and a review. Overview on Degradation of Land Due to Over Grazing in Ethiopia. Hiwot Desta. Dipartimento di Scienze e Tecnologie Veterinarie per la Sicurezza Alimentare.

Although these hardy pioneers in Patagonia displayed admirable fortitude in braving the harsh climate, they established a system of land use that could not thrive given the region's geography and ecology.

relationship between overgrazing and desertification pictures

Domestic animals, particularly sheep, inflict far more damage on grasses as they graze than do native herbivores. As livestock strips an area down to minimal vegetation, a downward spiral begins.

Sheep are selective grazers and long-standing irresponsibility in management has intensified grazing patterns of uneven utilization. This inequity in grazing can lead to animal distribution levels that vary from 8 to 20 times the total stocking rate of a given pasture.

What is the relationship of overgrazing to desertification?

This grazing pattern makes it virtually impossible for certain plants to recover. More and more woody, unpalatable plants dominate the landscape as livestock selectively eat grasses and not these scrubs, rendering the land less productive for both livestock and wildlife. Damaged grasslands retain less moisture, continuing to break up ground cover and further inhibiting the re-growth of native, perennial plants that are more capable of sabsorbing carbon dioxide and enriching soil.

Meanwhile, diminishing vegetation cover leaves sandy soils vulnerable to wind erosion from Patagonia's notoriously fierce winds. Like in regions of Africa bordering the Sahara, vast areas of Patagonia have already turned to desert, virtual dead zones for flora and fauna. Damaged grasslands are vulnerable to wind erosion Cattle ranching in Patagonia These ecologically damaging practices have proven economically unsustainable as well.

What is Overgrazing?

Although drastically lower stocking rates might make sheep ranching ecologically responsible, such a system would not be economically viable in much of the region given its remoteness, severe climate and the relatively low global price of meat and wool. The animals resume grazing before the plants have restored carbohydrate reserves and grown back roots lost after the last defoliation.

The result is the same as under continuous grazing: As the sod thins, weeds encroach into the pasture in some parts of the United Stateswhereas in most other parts of the worlds overgrazing can promote thick swards of native unpalatable grasses that hamper the spread of weeds.

Another indicator of overgrazing in some parts of North America is that livestock run out of pasture, and hay needs to be fed early in the fall. In contrast, most areas of the world do not experience the same climatic regime as the continental United States and hay feeding is rarely conducted. Overgrazing is also indicated in livestock performance and condition.

Over-grazing and desertification in the Syrian steppe are the root causes of war

Cows having inadequate pasture immediately following their calf 's weaning may have poor body condition the following season.

This may reduce the health and vigor of cows and calves at calving. Also, cows in poor body condition do not cycle as soon after calving, which can result in delayed breeding. This can result in a long calving season.

Conservacion Patagonica :: Overgrazing and Desertification

Poor weaning weights of calves can be caused by insufficient pasture, when cows give less milk and the calves need pasture to maintain weight gain.

Soil fertility can sometimes be mitigated by applying the appropriate lime and organic fertilizers. However, the loss of soil depth and organic matter takes centuries to correct. Their loss is critical in determining the soil's water-holding capacity and how well pasture plants do during dry weather. North America[ edit ] In the continental United Statesto prevent overgrazing, match the forage supplement to the herd's requirement. This means that a buffer needs to be in the system to adjust for the fastest growth of forages.

Another potential buffer is to plant warm-season perennial grasses such as switchgrasswhich do not grow early in the season.

This reduces the area that the livestock can use early in the season, making it easier for them to keep up with the cool-season grasses.

relationship between overgrazing and desertification pictures