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Researchers Find That Wild Donkeys and Horses Dig Desert Watering Holes Vital For Entire Ecosystem


Researchers Find That Wild Donkeys and Horses Dig Desert Watering Holes Vital For Entire Ecosystem
E. Lundgren
Research on feral horses and wild donkeys in the American southwest show they dig desert wells with their hooves in the soft sand of riverbeds, thus creating a network of extra fresh water sources for the creatures that are native to the area.
This find has thrown a wrench in the prevailing wisdom that feral equids, who were introduced by the Spanish, are pests that should be removed as the scientist behind the research suggests they could be fulfilling a vital function once performed by now-extinct mammals from the Pleistocene. ....

United States , Erick Lundgren , University Of Aarhus , Mojave Desert , Mojave Deserts , ஒன்றுபட்டது மாநிலங்களில் , எரிக் லண்ட்கிரென் , பல்கலைக்கழகம் ஆஃப் ஆர்ஹஸ் , மோஜாவே பாலைவனம் , மோஜாவே பாலைவனங்கள் ,

Life sciences professor discusses importance of plant, human diversity


The Daily Universe
BYU College of Life Sciences professor Rick Jellen used the Allegory of the Olive Trees to show how God loves each of His children in a May 11 devotional address. (Jaren Wilkey/BYU Photo)
BYU College of Life Sciences professor Rick Jellen testified of God’s love for each of His children and the importance of human diversity in his devotional address on May 11.
Jellen used the Allegory of the Olive Trees to show how God loves each of His children and said it is especially interesting to him as a crop geneticist.
As part of his career, Jellen studies quinoa and oats and their relationship with wild relatives. Although the quinoa and oats differ from the olive tree, there are two shared characteristics. Quinoa and oats were domesticated from invasive weeds and they tend to revert back to their ancestral weedy forms, just like olive trees. ....

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Equids engineer desert water availability


Science for just $15 USD.
Digging for water
Water is scarce in dryland ecosystems. Some larger animals in these regions dig wells that may provide water to other species. This behavior may have been common among megafauna that are now extinct, especially in North and South America, where megafaunal extinctions were the most severe. Lundgren
et al. tested whether feral equids (horses and donkeys) reintroduced to desert regions in the North American southwest dig wells that provide ecosystem-level benefits. They found that equid-dug wells increased water availability, were used by a large number of species, and decreased distance between water sources. Abandoned wells also led to increased germination in key riparian tree species. Such equid-dug wells improve water availability, perhaps replacing a lost megafaunal function. ....

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