| 翻訳と辞書 |
| Laguna de Santa Rosa ： ウィキペディア英語版 |
Laguna de Santa Rosa
The Laguna de Santa Rosa is a long wetland complex that drains a 254-square mile (658-square kilometer) watershed encompassing most of the Santa Rosa Plain in Sonoma County, California, USA.
==Description==
The Laguna, whose principal tributary streams rise on the southern slopes of the Sonoma and Mayacamas Mountains,〔''Santa Rosa Quadrangle'', Fifteen minute series, USGS Quadrangle Map, U.S. Government Printing Office, Washington, D.C. (1958)〕 is the largest tributary of Mark West Creek. The sinuous watercourse and associated wetlands form a significant floodplain during the heavy winter rains, capable of storing over of stormwater.
Beyond its hydrological significance, the Laguna is Sonoma County's richest area of wildlife habitat, and the most biologically diverse part of the county, having been called a "national treasure" for its ecological wealth.〔Gina Covina, ''New Life for the Laguna: Santa Rosa's Wetlands not Going to Waste'', Bay Nature, October–December, 2005〕 A number of rare and endangered species occur in the Laguna, including federally listed threatened and endangered anadromous salmonid species and three endangered plants that are endemic here. From about 1870 to 1990 water quality and biota deteriorated in the Laguna, due to intensification of urban development〔''Laguna de Santa Rosa Drainage Project'' (description, history, land use and natural resources of the Laguna de Santa Rosa ), Sebastopol Times, Sebastopol, Ca., May 15, 1915〕 and associated agricultural encroachment into the floodplain. In the 1990s the trend began to reverse, but the watercourse is still listed as impaired under the federal Clean Water Act for sediment, nitrogen, phosphorus, temperature, mercury, and dissolved oxygen, rendering it the most impaired water body on the North Coast of California.〔(State of California regulatory compliance status for Laguna de Santa Rosa )〕 Notwithstanding the large historical reduction in resource extent, the Laguna de Santa Rosa is presently the second largest freshwater wetland in coastal Northern California and still habitat to over 200 species of birds, threatened and endangered salmonid species, bald and golden eagle, osprey, mountain lion, river otter, coyote, bobcat, mink and gray fox.
While the Laguna has been heavily impacted by human activities in its watershed over the past century, in recent years a movement has grown to preserve and restore it both for ecological functions such as habitat values and flood control capacity, and for outdoor recreation, education and research. The nonprofit Laguna de Santa Rosa Foundation, founded in 1989, has professionalized and expanded the scope of its programs since 2002, spearheading efforts to protect, restore, and create opportunities for the public to enjoy and learn in the Laguna.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
■ウィキペディアで「Laguna de Santa Rosa」の詳細全文を読む
スポンサード リンク
| 翻訳と辞書 : 翻訳のためのインターネットリソース |
Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.
|
|