lake ecosystem Articles

  • Is Lake Prespa Jeopardizing the Ecosystem of Ancient Lake Ohrid?

    Lake Prespa and Lake Ohrid, located in south-eastern Europe, are two lakes of extraordinary ecological value. Although the upstream Lake Prespa has no surface outflow, its waters reach the 160 m lower Lake Ohrid through underground hydraulic connections. Substantial conservation efforts concentrate on oligotrophic downstream Lake Ohrid, which is famous for its large number of endemic and relict ...


    By Springer

  • Thermal stratification - Destroyer of healthy pond and lake ecosystems

    IT is early spring in a small reservoir which supports an exclusive condominium and golf coursa development. At and near the surface of the pond, in the layer called th: epilimnion, microscopic plants and animals (phytoplarikt< in and zaoplankton) feed on each other and are fed on in turn by small fish and other animals. Wind and wave action at the surface causes oxygen from the air to be ...


    By EP Aeration

  • The Great Lakes, an Ecosystem Rehabilitated, But Still Under Threat

    Since 1972, the Parties (United States and Canada, 1987) to the Great Lakes Water Quality Agreement have been working collaboratively to achieve the purpose of the Agreement “to restore and maintain the chemical, physical and biological integrity of the waters of the Great Lakes Basin Ecosystem”. Billions of dollars and countless person – hours have been expended towards this end, but have the ...


    By Springer

  • Lake dredge

    Final Dredge Effluent Polishing with CESF Treatment using ChitoVan Chitosan Lactate Hosting over 400 different species of plant, bird, fish, reptiles and amphibians, Burnaby Lake is the most ecologically valuable resources in the Vancouver, BC area. Over the course of many years of nearby development the lake had become filled with a substantial amount of sediment. To protect and enhance the ...


    By Dungeness Environmental

  • Fate Of Polychlorinated Biphenyls In A Contaminated Lake Ecosystem: Combining Equilibrium Passive Sampling Of Sediment And Water With Total Concentration Measurements Of Biota

    Equilibrium sampling devices (ESDs) can be applied to study and monitor the exposure and fate of hydrophobic organic chemicals (HOCs) on a thermodynamic basis. ESDs can be used to determine freely dissolved concentrations and chemical activity ratios, and to predict equilibrium partitioning concentrations of HOCs in biota lipids. Our aim was to assess the equilibrium status of polychlorinated ...


    By John Wiley & Sons, Ltd.

  • Utilization and flow of energy in tropical ecosystem: A test case for two Ox-bow lakes

    Abstract: To estimate the rate of organic production, two solar powered tropical natural aquatic systems (Ox-bow lakes) have been studied for 24 months. The study of utilization of energy in those two tropical lakes has revealed that herbivores were more efficient in energy utilization than autotrophs. Silver carp and grass carp were found to be most efficient in conversion of energy in the ...

  • The Economics of Ecosystems and Biodiversity for Water and Wetlands

    The Economics of Ecosystems and Biodiversity (TEEB) is an international initiative to draw attention to the benefits of biodiversity. It focuses on the values of biodiversity and ecosystem services, the growing costs of biodiversity loss and ecosystem degradation, and the benefits of action addressing these pressures. The TEEB initiative has brought together over five hundred authors and ...


    By Wetlands International

  • July is Lake & Reservoir Awareness Month!

    Lakes and reservoirs cover over 40 million acres of the United States. Lakes and reservoirs also play other vital and often hidden, roles. They provide drinking water and irrigation water for agricultural fields and many times a source of electricity and power generation. They also serve an important function of absorbing rainfall and runoff from land, help to prevent floods, and provide ...

  • Understanding and Managing the Effects of Climate Change on Aquatic Ecosystems

    There is mounting evidence that climate-changeinduced extreme events are expected to adversely affect the aquatic ecosystems and ecosystem services that they provide. To address this need to understand how climate, aquatic ecological, and social systems interact and how to manage these coupled systems, LimnoTech is participating with a large team of researchers (from Stanford University, the ...


    By LimnoTech Inc.

  • Bringing ecosystem markets to scale in the Southern United States

    For the most part, Ecosystem Markets still linger in the early stages of development. There is much more theoretical work to be done to set up environmental credit markets, including carbon offsets and payments for watershed services. But more pilot projects can also help these markets evolve and show how they might work in the real world. Development pressures in the U.S. South often mean ...

  • Isolation of microbes from lake vostok accretion ice

    Bacteria from seven Lake Vostok accretion and two deep glacial Vostok ice core sections were characterized. The cell concentrations were low, but many of the cells were viable. From the hundreds of cultures, 18 unique bacterial rRNA gene phylotypes were determined. Lake Vostok may contain a complex microbial ...

  • Environmental sustainability at the hierarchical level of lake systems

    This paper argues that some determinants of environmental sustainability may be illuminated by examining temporal and geographic variation across lake systems. Typically, lakes respond to both transient and more permanent environmental changes, natural or anthropogenic, and the results of these variations are usually recorded by a diverse set of in-lake indicators. Cause and effect relationships ...


    By Inderscience Publishers

  • Multiscale Drivers of Water Chemistry of Boreal Lakes and Streams

    Abstract The variability in surface water chemistry within and between aquatic ecosystems is regulated by many factors operating at several spatial and temporal scales. The importance of geographic, regional-, and localscale factors as drivers of the natural variability of three water chemistry variables representing buffering capacity and the importance of weathering (acid neutralizing ...


  • Evaluation of eutrophication process in Lake Sapanca (Sakarya, Turkey)

    Lakes are generally subjected to wastewater discharges from various sources. Certain chemicals, such as nitrogen, phosphorus and carbon, in the right concentrations can distort and disrupt aquatic ecosystems by overfeeding. Eutrophication of inland bodies of water has become synonymous with the deterioration of water quality, which interferes with most of the beneficial uses of waters. ...


    By Inderscience Publishers

  • Evaluation of zebra mussels (Dreissena polymorpha) as biomonitors of mercury contamination in aquatic ecosystems

    Zebra mussels have invaded many lakes in the United States and could be a useful tool for monitoring responses of aquatic biota to changes in mercury loading. The goal of the present study was to evaluate zebra mussels for use as a biomonitor of mercury contamination by comparing zebra mussel mercury concentrations between a lake with only indirect atmospheric mercury contamination (Otisco ...


    By John Wiley & Sons, Ltd.

  • Lake Water Quality Model with Focus on Cyanobacteria

    ABSTRACTThe cause of cyanobacteria’s growth and dominance in certain eutrophic lakes is explored via a water quality model application. The one-dimensional lake water quality model includes nitrogen, phosphorus, silica, three phytoplankton groups and zooplankton. Lake Washington was used as the case study due to its unique history of eutrophication during a large wastewater nutrient loading ...

  • Monitoring mixing dynamics in Toolik Lake, Alaska

    Toolik Lake is 130 miles south of Prudhoe Bay in northern Alaska. It is one of the main monitoring sites of the Arctic Long-Term Ecological Research (LTER) project and a site for studies led by Sally MacIntyre of the University of California investigating the linkages between hydrodynamics and ecosystem function. Both studies are funded by the U.S. National Science Foundation. It is classified as ...

  • Impact of Man’s Activities on a Closed Fishing-Lake, Lake Maryout in Egypt, as a Case Study

    Manyas, also known as the Bird Paradise Lake, is situated near the south-eastern coasts of the Marmara Sea in Turkey. This shallow lake, is a unique natural reserve providing habitat for migratory birds with its rich fauna and plankton species. The objective of this work is to study the ecological and water quality changes resulting from increasing anthropogenic pollution and human intervention ...


    By Springer

  • Contrasting PCB bioaccumulation patterns among Lake Huron lake trout reflect basin specific ecology

    This study collected multiple age classes of lake trout from Lake Huron's Main Basin, Georgian Bay and North Channel regions to compare and contrast top predator polychlorinated biphenyl (PCB) bioaccumulation patterns in separate compartments of the same ecosystem. Sum PCB concentrations were highest for Main Basin (260 ± 24.9 ng · g−1 wet wt.) fish followed by Georgian Bay (74.6 ± 16.2 ...


    By John Wiley & Sons, Ltd.

  • Cross‐basin comparison of mercury bioaccumulation in lake Huron lake trout emphasizes ecological characteristics

    Understanding factors influencing mercury (Hg) bioaccumulation in fish is important for examining both ecosystem and human health. However, little is known of how differing ecosystem and biological characteristics can drive Hg bioaccumulation in top predators. This study compared and contrasted Hg bioaccumulation in multiple age classes of lake trout (Salvelinus namaycush) collected from ...


    By John Wiley & Sons, Ltd.

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