Friday, May 30, 2014

Dietland Müller-Schwarze has studied beaver behavior for over 30 years and currently is Emeritus Professor of Environmental Biology at SUNY College of Environmental Science and Forestry in Syracuse, NY...............Today, he gives us all a primer on how Beavers go about defending their territories from others of their kind................"Beavers mark their territories by creating "mud mounds" and then squirting them with castoreum from glands near the base of their tales".............."Castoreum contains many different kinds of compounds: alkaloids, phenolics, terpenes, alcohols, and acids among them"............. "The beaver appropriates the ingredients from the plants it eats"............"Compounds from a number of trees in the beaver’s diet end up in their castoreum".............. "Benzyl alcohol occurs in aspens and poplars, benzoic acid in black cherry and scots pine, and catechol in common cottonwood"................ "In summer, beavers eat aquatic plants such as pondweed and pond lilies – the alkaloids that these plants use to deter insects also end up in the beaver’s mix"...................."So there rages a chemical arms race in the woods"................. "Trees bolster their defenses against herbivores, especially during the dormant season"............ "Beavers and other animals defeat these defenses by breaking down, detoxing, sequestering, and recycling potentially harmful compounds"

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beaver Arms Race in the Woods: How Beavers Recycle Tree Defenses | The Outside Story | Ma...