Louis J. Sheehan, Esquire. Pioneering ecologist Joseph Grinnell in 1914 began a seven year survey
of the animals living in Yosemite National Park in California. Even
then, human impacts such as the transformation of the Central Valley
into an agricultural oasis were changing the landscape and the animals
who lived there.
Nearly a century later, one cause for the transformation of California wildlife has come to overshadow all others: global warming.
Now scientists have found |