trezor.io
Rate this file (Rating : 5 / 5 with 1 votes)
Sequoia trees, Redwood National and State Parks, California, United States
trezor.io

Sequoia Trees, Redwood National And State Parks, California, United States

Paleontology
Sequoioideae is an ancient taxon. The first Seqoioideae, Sequoia jeholensis, was discovered in Jurassic deposits. The fossil record shows a massive expansion of range in the Cretaceous and dominance of the Arcto-Tertiary flora, especially in northern latitudes. Genera of Sequoioideae were found in the Arctic Circle, Europe, North America, and throughout Asia and Japan. A general cooling trend beginning in the late Eocene and Oligocene reduced the northern ranges of the Sequoioideae, as did subsequent ice ages. The entire paleohistory of Sequoioideae has been a story of migration rather than adaptation. Evolutionary adaptations to ancient environments persisted in all three species despite changing climate, distribution, and associated flora. Morphological stasis over millennia ultimately forced these species into extremely limited ranges where they persist, though in a very vulnerable state.

File information
Filename:509789.jpg
Album name:Fauna & Flora
Rating (1 votes):55555
Keywords:#sequoia #trees #redwood #national #state #parks #california #united #states
Filesize:81 KiB
Date added:Oct 09, 2012
Dimensions:650 x 593 pixels
Displayed:126 times
URL:displayimage.php?pid=509789
Favorites:Add to Favorites