| 词条 | Mann Lake |
| 释义 |
| name = Mann Lake | image = Mann Lake.jpg | caption = | image_bathymetry = | caption_bathymetry = | location = Harney County, Oregon | coords = {{coord|42|46|20|N|118|26|49|W|region:US-OR_type:waterbody|display=inline,title}} | type = Natural, hypereutrophic | inflow = Intermittent streams | outflow = Evaporation | catchment = {{convert|41|mi2|km2}} | basin_countries = United States | length = | width = | area = {{convert|276|acre|ha}} | depth = {{convert|6|ft|m}} | max-depth = {{convert|14|ft|m}} | volume = {{convert|1600|acre-feet|m3}} | residence_time = | shore = {{convert|2.4|mi|km}} | elevation = {{convert|4173|ft|m}} | islands = | cities = Burns; Fields | reference=[1][2][3] }}Mann Lake is the largest of the shallow playa lakes in the northern part of the Alvord Valley in Harney County in the U.S. state of Oregon. The lake is a remnant of a larger Pleistocene lake that covered much of the valley, east of Steens Mountain. Fields–Denio Road runs along the east side of the lake.[2] Inflow to Mann Lake comes from small, intermittent streams, mainly from Steens Mountain. The lake, which has no outlet, but loses water by evaporation, is hypereutrophic. An influx of cattle waste from nearby rangelands adds to the lake's natural eutrophic state. Large concentrations of Cladophora algae are common.[2] The Bureau of Land Management operates the Mann Lake Recreation Site, about {{convert|100|mi|km}} southeast of Burns by highway and unpaved road. The site has vault restrooms and boat ramps, but no other amenities. Recreation at or near the site includes fishing, camping, hiking, wildlife viewing, and amateur geology.[4] Mann Lake, stocked with Lahontan cutthroat trout, has been called "one of the premiere trout fisheries in southeast Oregon".[5] Trout in the lake range in length from {{convert|12|to|20|in|cm}}.[5] Fishing is restricted to artificial flies and lures.[5] A large population of goldfish, introduced illegally, have at times multiplied in Mann Lake and competed for food with the smaller trout.[5] In 2010, the Oregon Department of Fish and Wildlife treated the lake with rotenone, a piscicide, killing around 200,000 goldfish and fathead minnows while sparing nearly all the trout.[6] See also
References1. ^{{cite book|last=Johnson|first=Daniel M.|author2=Petersen, Richard R. |author3=Lycan, D. Richard |author4=Sweet, James W. |author5= Neuhaus, Mark E., and Schaedel, Andrew L. | title=Atlas of Oregon Lakes|publisher=Oregon State University Press|location=Corvallis|year=1985|page=232|isbn=0-87071-343-4}} 2. ^1 2 {{cite web|title=Atlas of Oregon Lakes: Mann Lake (Harney County) |url=http://aol.research.pdx.edu/?q=lake/478|publisher=Portland State University|year=1985–2012|accessdate=December 20, 2012}} 3. ^{{cite web | url ={{gnis3|1123729}} | title = Mann Lake | work=Geographic Names Information System|publisher = United States Geological Survey|date=November 28, 1980 |accessdate = December 20, 2012}} 4. ^{{cite web|title=Alvord Desert/Mann Lake|url=http://www.blm.gov/or/districts/burns/recreation/alvord-mann.php|publisher=Bureau of Land Management|accessdate=December 20, 2012}} 5. ^1 2 3 {{cite book|last=Sheehan|first=Madelynne Diness|title=Fishing in Oregon: The Complete Oregon Fishing Guide|edition=10th|publisher=Flying Pencil Publications|location=Scappoose, Oregon|pages=282–83|isbn=0-916473-15-5}} 6. ^{{cite news|last=Monroe |first=Bill |title=Mann Lake Gets a Second Round of Rotenone for Cutthroat Restoration |url=http://www.oregonlive.com/sports/oregonian/bill_monroe/index.ssf/2010/12/mann_lake_gets_a_second_round.html |work=The Oregonian |publisher=Oregon Live LLC |date=December 3, 2010 |accessdate=December 20, 2012 |archiveurl=https://www.webcitation.org/6DG6HWJJV?url=http://www.oregonlive.com/sports/oregonian/bill_monroe/index.ssf/2010/12/mann_lake_gets_a_second_round.html |archivedate=December 28, 2012 |deadurl=yes |df= }} External links
3 : Lakes of Oregon|Lakes of Harney County, Oregon|Endorheic lakes of Oregon |
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