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Why does trampling by livestock make soil more vulnerable to erosion?
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desertification
Young trees planted to hinder sandstorms and reverse desertification in the Xihu preservation area of the Gobi Desert, near Dunhuang, China.
Trampling by livestock increases soil vulnerability to erosion through several destructive processes that degrade the land's natural defenses:
- Destruction of Vegetation: Livestock often trample and kill plants, particularly along paths to water sources. This removes the vegetation cover that is essential for anchoring the soil and protecting it from wind and water forces.12
- Loss of Root Systems: Trampling destroys the root systems that bind soil particles together. Without these roots, the soil becomes loose and significantly easier for elements to displace.12
- Soil Compaction: The repeated movement of herds over the same areas compacts the soil. This compaction hinders the ability of new plant roots to develop, preventing the recovery of protective vegetation.2
- Channel Formation: When rain falls on these trampled, bare paths, the lack of ground cover allows water to form rivulets. These channels concentrate the flow of water, which then washes away the unprotected topsoil, accelerating the process of desertification.2