EPOW - Ecology Picture of the Week

Each week a different image of our fascinating environment is featured, along with a brief explanation written by a professional ecologist.

30 June - 6 July 2003

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Tassel Ears of the Forest

 

Abert's or Tassel-eared Squirrel (Sciurus aberti)

Credit & Copyright: Dr. Bruce G. Marcot

Explanation:   No, it's not a pointy-eared Vulcan from Star Trek.  It's a Tassel-eared Squirrel of Ponderosa pine (Pinus ponderosa) forests of southwest U.S. and northern Mexico.  Also called Abert's Squirrel, this beautiful animal usually inhabits the tree canopies, consuming pine bark, seeds, flowers, and buds.  But they also risk ground-dwelling predators and dig in the forest floor for fungi.  

Abert's Squirrels bury pine cones in the ground in a "cache" to which they may later return to reap the food rewards.  This behavior may help to disperse Ponderosa pine trees throughout the forest, making conservation of this arboreal rodent a part of conserving productive forests.  

This sleepy sciurid was captured and tagged as part of a research project in Ponderosa pine forests of northern Arizona.  View a slide series of the capture.

Abert's squirrel was named after Col. J. J. Abert, a naturalist, military officer, and topographical engineer of the early 1800s.  

Further information:  Kotter, M. M., and R. C. Farentinos. 1984. Tassel-eared squirrels as spore dispersal agents of hypogeous mycorrhizal fungi. Journal of Mammology 65:684-687.

Next week's picture:  Colorful Songs in Your Back Yard


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