放牧の影響でシェラの水はかなり汚染されている。
Based on "Impact of Summer Cattle Grazing on the Sierra Nevada Watershed: Aquatic Algae and Bacteria" by Robert W. Derlet, et al. ournal of Environmental and Public Health
Volume 2012 (2012), Article ID 760108, the cattle Grazing have significant influence on the Sierra water.
Table 1
Wild sites
------------------------
Golden Bear Lake, KC
West Window Creek, KC
Marie Lake, Muir
Silver Pass Creek, Muir
Silver Pass Lake, Muir
Chief Lake, Muir
Lake Virginia, Muir
Granite Lake, Yos
Gaylor Lake, Yos
Conness Creek, Yos
Upper Young Lake, Yos
Townsley Lake, Yos
Lake 12,248m, KC
Bago Springs, KC
Glen Pass Spring, KC
Creek from Lake 10320m, KC
Ireland Creek, Yos
Tuolumne River (High), Yos
Tuolumne River (Low), Yos
Young Lake, Yos
Side Creek/Young Lake, Yos
Dog Lake, Yos
Middle Young Lake, Yos
Duck Lake, Muir
Purple Lake, Muir
Fish Creek, Muir
Squaw Lake, Muir
Hilgard Creek, Muir
Mono Creek, Muir
Robinson Creek, Hoover
Barney Lake, Hoover
Fremont Lake, Hoover
West Walker River, Hoover
Long Creek, Hoover
Toejam Lake, Emigrant
Silver King Creek, Carson
Recreational sites
-------------------------------------
Charlotte Lake, KC
Bullfrog Lake, KC
Smith Lake, Tahoe
Bubbs Creek, KC
Rae Lake (Mid), KC
Rae Lake (Lower), KC
Arrowhead-Dollar, KC
Dollar Lake, KC
SF Kings River, KC
Lake 12,500m, JMT, KC
Kearsarge Lake, KC
Booth Lake, Yos
Fletcher Creek, Yos
Fletcher Lake, Yos
Vogelsang Lake, Yos
Ireland Lake, Yos
Cattle sites
---------------------------
Cottonwood Creek, Stan
Boggie (High), Stan
Boggie (Mid), Stan
Boggie (Low), Stan
Cow Creek, Stan
Little Walker River, Hoover
Molybdenite, Hoover
Buckeye, Hoover
Big Meadow (High), Hoover
Big Meadow (Low), Hoover
Summit Lake, Tahoe
Bull Creek, Carson
Table 2
Noncattle sites
---------------
Zygnema
Ulothrix
Chlorella
Oedogonium
Spirogyra
Diatoms,
Cladophora
Mougeotia
Didymosphenia
Chlorokybus
Chlorococcum
Cattle sites
------------
Ulothrix
Zygnema