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Over Grazing

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by

Georgia Kj

on 10 September 2013

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Transcript of Over Grazing

Over Grazing
What is the threat to the habitats?
Overgrazing is too many livestock grazing on a particular area of land for long periods of time without recovery periods. These plants are grazed on for lengthy periods of time and cannot survive this threat. The cattle are badly managed by their farmer, though this constantly happens today. Overgrazing limits the usefulness, productivity and biodiversity of the land. Desertification, soil erosion, land degradation and the destruction of vegetation are the often results in overgrazing.
Approximations of overgrazing globally are on the order of one third of all range land. Researchers have found that around twelve percent of the biomass has disappeared in Australia and seventy percent of the grassland ecosystem is measured as degraded.
Which habitats are most likely to be affected by this? Why?
Where in the world is this most noticeable?
Some places where this is most noticeable include; Arizona, Oregon and third-world countries. The boundary between The Chaco Canyon National Monument and the Navajo reservation are being threatened by overgrazing. On one side, long-term total rest from livestock grazing occurs. On the other, livestock grazing with relatively few animals for long periods excessively happens and nothing is preventing this.
Why is this posing a threat to habitats?
Overgrazing impacts the flora and fauna as there is an increase in soil erosion, soil organic matter, soil fertility impair, a reduction in soil depth and the land’s future natural and agricultural productivity. The loss of soil depth and organic matter are detrimental to the environment and the regrowth of biodiversity takes centuries to regain the balance. Plants cannot survive or regrow overgrazing, which takes the impact of the fauna that do not have any food to consume.
What impact is this having on the flora and fauna of this habitat?
What can be done to slow down or prevent the threat to these habitats?
There are many ways to prevent and stop overgrazing.
One is to find an alternative food source for the livestock that is not grass. This include hay, straw, grains and vegetables.
Another way is to rotate throughout the field. This means splitting up a field into sections for the livestock to eat. When the field looks like it needs regrowth, moving to the next patch would prevent overgrazing.
Bringing the cattle into the stable or inside once or twice a day would reduce the amount of time livestock have on a particular area.

Did you know
that if cattle graze of
more than half the growth
for an area, it will slows or stops natural regrowth of the plants.
This is posing a threat to habitats as the vegetation in the area would become dry or die out eventually. The animals would run short of pasture and would go hungry. This leads to the loss of biodiversity, the loss of topsoil, an increase in flood frequency and the increase of turbidity in surface waters. Research has proven that overgrazing is a major influence to climate change and also decreases photosynthesis and carbon dioxide. This impacts the greenhouse gas, methane which disturbs the earth’s biosphere.
The habitats that are most likely to be affected by this are dry areas that don’t receive much rain. Farms are most likely to be affected as well and this also is the most detrimental place for overgrazing to occur because of the essential crops and farming. Once overgrazing has impacted the farm area, the sprouts do not grow again.
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