نتایج جستجو برای: shallow lake

تعداد نتایج: 77158  

2017
YONGWEI WANG YAQI GAO HAIRUN QIN JIANPING HUANG CHENG LIU CHENG HU WEI WANG SHOUDONG LIU XUHUI LEE

Lake Taihu is a shallow lake located in the Yangtze River delta region in eastern China. Lake breezes and their interactions with urban heat islands are of great importance to air quality andweather forecasting. In this study, surface observations at a dense network and Wind Profile Radar measurements were utilized to characterize the lake breezes at Lake Taihu and assess the impact of geophysi...

2007
John Janssen J. Ellen Marsden Charles R. Bronte David J. Jude Shawn P. Sitar Frederick W. Goetz

Restoration efforts for lake trout Salvelinus namaycush in Lake Michigan are increasingly being focused on re-establishment of the species in deep water. This focus is based in part on examination of historical records of indigenous lake trout, which suggest that offshore reefs, especially deep reefs, sustained the greatest numbers of lake trout. This focus is also based on the increasing impac...

2016
Karl Havens Hans Paerl Edward Phlips Mengyuan Zhu John Beaver

Shallow lakes, particularly those in low-lying areas of the subtropics, are highly vulnerable to changes in climate associated with global warming. Many of these lakes are in tropical cyclone strike zones and they experience high inter-seasonal and inter-annual variation in rainfall and runoff. Both of those factors strongly modulate sediment–water column interactions, which play a critical rol...

2008
John D. Madsen R. Michael Stewart Kurt D. Getsinger Robert L. Johnson Ryan M. Wersal

A point-intercept survey was implemented in August 2000 to determine the distribution and richness of aquatic plant species present in Waneta Lake and Lamoka Lake, NY. Myriophyllum spicatum (Eurasian watermilfoil) was the most commonly observed species in Waneta Lake (25% of entire lake, 78% of littoral zone) and Lamoka Lake (43% of entire lake, 77% of littoral zone). Eurasian watermilfoil biom...

Journal: :Dong wu xue yan jiu = Zoological research 2011
Jin-Yun Chen Li-Zhi Zhou Bo Zhou Ren-Xin Xu Wen-Zhong Zhu Wen-Bin Xu

The shallow lake wetlands in the middle and lower Yangtze River floodplain are important wintering and stopover habitats for migratory waterbirds on the East Asia-Australia Flyway. With increasing fishery practices in recent years, however, the wetlands have deteriorated significantly and now threaten wintering waterbirds. To gain insight into the influence of deteriorating wetlands on waterbir...

Journal: :Brazilian journal of biology = Revista brasleira de biologia 2009
L M Rangel L H S Silva M S Arcifa A Perticarrari

Phytoplankton vertical and diel dynamics in a small shallow lake (Lake Monte Alegre, Ribeirão Preto, state of São Paulo) were investigated in two climatological periods: July 2001 (cool-dry season) and March 2002 (warm-rainy season). Monte Alegre is a eutrophic reservoir, with a warm polymictic discontinuous circulation pattern. The lake was thermally stratified in both periods, although dissol...

2001
Karl E. Havens

Lake Okeechobee is a large (1,730 km) freshwater lake located at the center of the interconnected south Florida aquatic ecosystem. The lake is shallow (average depth <3 m), originated about 6,000 years ago during oceanic recession, and under natural conditions probably was a slightly eutrophic and had vast marshes to the west and south. The southern marsh was contiguous with the Florida Evergla...

2017
Martin Søndergaard Torben L. Lauridsen Liselotte S. Johansson Erik Jeppesen Benoit Demars

Biomanipulation by fish removal has been used in many shallow lakes as a method to improve lake water quality. Here, we present and analyse 30 years of chemical and biological data from the shallow and 16 ha large Lake Væng, Denmark, which has been biomanipulated twice with a 20-year interval by removing roach (Rutilus rutilus) and bream (Abramis brama). After both biomanipulations, Lake Væng s...

2000
V. Y. Alexandrov S. Sandven O. M. Johannessen N. N. Filatov A. V. Bogdanov M. V. Alexandrov

The water bodies of the Northwestern Russia significantly influence the regional climate and ecology and in its turn are also effected by global and regional climate change. Ice parameters, such as the duration of ice cover, ice thickness and some others are sensitive indicators of regional climate variations [1]. Freeze-up in Ladoga Lake, which is the largest in Europe, usually starts in Novem...

2012
Mark A. Hanson Brian R. Herwig Kyle D. Zimmer John Fieberg Sean R. Vaughn Robert G. Wright Jerry A. Younk

Constraints on lake communities are complex and are usually studied by using limited combinations of variables derived from measurements within or adjacent to study waters. While informative, results often provide limited insight about magnitude of simultaneous influences operating at multiple scales, such as lake- vs. watershed-scale. To formulate comparisons of such contrasting influences, we...

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