Articles tagged with Lakes
Researchers found that aquatic life in Ward Hunt Lake has undergone significant transformations over the last two centuries, with abrupt changes in algae population and diatom presence. The lake's conditions have become more favorable for algae growth, raising concerns about climate change's impact on Arctic ecosystems.
A three-year study published in the Proceedings of the National Academy of Sciences found that an increase in mercury loading resulted in a significant increase in methylmercury production and accumulation in fish. The study suggests that reducing atmospheric mercury emissions can lead to lower mercury levels in fish within a few years.
Scientists at the Smithsonian Tropical Research Institute have discovered an established population of invasive Harris mud crabs in the Panama Canal's Miraflores Third Lock Lake. The crustaceans, native to North America, are known to cause environmental and economic harm, fouling pipes and preying on fish in gill nets.
A UC-Riverside hydrologist will study the ecological impact of climate change on mountain lakes, focusing on atmospheric deposition of nutrients. The research aims to understand how nutrient enrichment affects lake productivity and ecology, with potential implications for regulatory agencies setting air quality standards.
Dr. Clyde Goulden, a veteran scientist, received Mongolia's Friendship Medal for his climate change studies contributing to the global understanding of global warming. He has developed relations between the U.S. and Mongolia and promoted environmental research in the country.
Scientists identified two abrupt climate changes 9,000 and 8,000 years ago, with temperature drops averaging 1.6 degrees, which could inform global climate models
A successful bioeradication program in Lake Victoria reduced fish populations, improved hydroelectric power generation, and decreased malaria and schistosomiasis cases. The program used natural enemies of the invasive water hyacinth to control its spread, eliminating the need for pesticides.
New evidence from Mexico's Central Balsas valley links crop domestication in the New World to local environmental history. Agriculture originated during a warm, wet period following the last ice age, and its effects on the environment are still evident today.
The viral hemorrhagic septicemia virus (VHSV) has been identified in 19 species and poses a potential threat to New York's sport-fishing industry. Containing the spread of the virus requires restrictions on live fish movement, testing, and surveillance.
Geologists at PNNL have identified 62 sites with known or suspected mammoth finds, verifying and collecting material from eight locations, including two this spring. Preliminary results suggest most mammoths were buried in the Lake Lewis area at elevations of 600-1,000 feet.
A recent study reveals that sediments in New Orleans and Lake Pontchartrain are contaminated with fecal microbes, which persisted before the hurricanes and continue to impact water quality. The researchers recommend further investigation into the risks of exposure to human pathogens through contact with these sediments.
Researchers from Boston University used satellite topographic data to discover an ancient mega-lake in the Darfur province of northwestern Sudan. The lake, which existed for a long period when rainfall was plentiful, holds significant implications for improving knowledge of continental climate change and regional palaeohydrology.
A recent analysis reveals that inland water bodies are significant areas of terrestrial carbon transformation, deserving inclusion in global carbon cycle assessments. The findings show that rivers transport complex transformations of carbon, with half entering the atmosphere and 12% stored in sediments.
A burst of protons from the Sun in 1859 caused unprecedented ozone destruction, with energy released six times larger than a 1989 solar flare. Simultaneously, research suggests that ancient Farallon plate movement may have triggered massive earthquakes in the central US, shedding light on seismic hazards.
A study led by LSU Professor Kam-biu Liu reveals that the chances of a Category 4 or 5 hurricane directly hitting any Gulf location are approximately 0.03 percent annually, contradicting previous assumptions.
Researchers at University of Bonn aim to tap into the sediment archives of Lake Van, which store climate data from 800,000 years ago. The sediments contain detailed information on temperature and precipitation patterns, allowing scientists to reconstruct past climates.
Researchers have discovered four large subglacial lakes beneath Antarctica's surface that contribute to the formation of ice streams and play a crucial role in transporting ice towards the ocean. The lakes' water helps lubricate the bed of the stream, speeding up its flow and potentially disrupting climate patterns.
Researchers discovered four large subglacial lakes beneath miles of ice that contribute to the formation of fast-flowing ice streams in Antarctica. These lakes appear to lubricate the bed of the stream, facilitating ice flow and preventing the base from freezing.
Cornell researchers are developing a new genetic-based test to detect the deadly viral hemorrhagic septicemia virus (VHSV) in fish. The new technique, which can identify the virus in 24 hours, is set to be validated by the end of 2007 and could become the standard test for detecting this disease.
Floods and aging infrastructure threaten the nation's drinking water safety, with inadequate monitoring and poor watershed protection being major concerns. According to MSU expert Joan Rose, combining sewer systems and climate change increase the risk of waterborne illnesses, especially in vulnerable communities.
Scientists detected subtle rise and fall of Antarctic ice streams' surface as lakes and channels filled and emptied. The discovery provides new insight into how much and how frequently these 'leaks' occur and impact the ice sheet.
Scientists have mapped a vast water system beneath two of West Antarctica's fastest-moving ice streams using NASA's ICESat satellite data. The study reveals that these subglacial lakes are actively filling and emptying, with water moving at rates of several meters per day.
A University of Wisconsin-Madison scientist has proven that composite materials can be stable even if one component is unstable, allowing for a wider range of properties and improved overall performance. This breakthrough could lead to materials with virtually limitless performance capabilities.
The study found that naked carp respond to increased lake salinity by taking a 'metabolic holiday', drastically reducing oxygen consumption and kidney function. They also adjust their feeding behavior and store more fat, but if the lake continues to dehydrate, these benefits may change to pathology.
New research suggests that changes in midge communities provide evidence of global warming. Midge populations shifted dramatically over the last three decades, with warmer-water midges outcompeting cooler-water species.
A new study of nearly 200 British men and women found that three-quarters of women assume the traditional role of chief cook and food shopper in their households. Women tend to take on more practical approaches to cooking and shopping, often citing time constraints or skills as reasons for their responsibilities.
The CATALIST Project will help maintain biodiversity, improve environmental management, and develop markets for agricultural inputs and crops in the Great Lakes region. Local people will be employed in labor-intensive public works to plant trees and build terraces and roads.
Katey Walter, a University of Alaska Fairbanks graduate, has been awarded the nation's top dissertation honor by the Council of Graduate Schools. Her Ph.D. dissertation research identified a new method of measuring methane emissions from Siberian lakes, revealing significant greenhouse gas emissions and their impact on global warming. ...
The American Chemical Society's Environmental Science & Technology journal highlights emerging contaminants such as nanoparticles, which can damage DNA, and polybrominated diphenyl ethers (PBDEs), which accumulate in aquatic food chains. These substances can have severe consequences for human health and the environment.
A Bowling Green State University biologist believes long-dormant influenza strains can be unleashed by melting ice in remote global outposts, posing a potential threat to human immunity.
A five-year study will examine the causes of the dead zone in Lake Erie, focusing on excess phosphorous, zebra mussels, and global warming. Researchers aim to detect the cause and prevent further spread before affecting the fishery and tourism industries.
The study reveals that the introduction of tributyltin as a biocide in boat paint led to a sudden loss of aquatic vegetation from most Norfolk Broads lakes. The ecosystem remains shattered despite efforts to restore it.
The Cassini spacecraft has detected a massive ethane cloud surrounding Titan's north pole, contradicting previous assumptions of extensive ethane clouds and surface liquids. The discovery suggests that ethane may be 'snowing' onto the surface, forming methane lakes below.
Researchers estimate that Siberian lakes are releasing five times more methane than previously thought, increasing the present estimate of northern wetland emissions by 10-63%. Methane is being released from thawing permafrost in the form of ancient dead plant material, acting as a 'time bomb' for climate warming.
As permafrost melts in North Siberia, carbon sequestered for 40,000 years is released as methane, exacerbating global warming. Methane emissions from thaw lakes have increased estimates by 10-63%, highlighting the critical role of Northern wetlands in atmospheric methane release.
A water filtration technique that combines activated carbon with membrane filters has been found to remove at least 95% of microcystin-lr, a toxin secreted by blue-green algae found in lakes and rivers. The technique outperformed other methods, including ultrafiltration membranes, which struggled to remove the toxin due to its small size.
Hurricane Katrina and Rita caused significant flooding, wind damage, and loss of wetlands in the Gulf Coast region. Experts discuss ways to mitigate future hurricane damage through ecological knowledge and restoration plans.
Researchers at UW-Madison presented studies on the ineffectiveness of fish advisories, the role of sulfate-reducing bacteria in mercury contamination, and the long-term consequences of in utero exposure to methylmercury. The findings highlight the need for improved communication, funding, and media coverage to address these issues.
Researchers at University of Wisconsin-Madison suggest a double whammy of intensive trapping and predator fish manipulation may rid lakes of the invasive species, restoring ecosystem balance. The two-pronged attack has shown promising results in reducing rusty crayfish populations on Sparkling Lake.
Researchers discovered a connection between catastrophic freshwater release from glacial lakes in North America and dramatic cooling in climate records approximately 8200 years ago. The study found that the freshwater forcing led to changes in deep ocean currents, which in turn affected northern hemisphere climate.
Research by Mark Graham found that pollen significantly enhances plankton growth in boreal lakes, supporting forage fish and potentially boosting sport fish populations. Climate change may impact this process, highlighting the importance of pollen in linking terrestrial and aquatic ecosystems.
In Lake Victoria cichlid fish, females choose brightly coloured males for good reasons: fewer parasites and better health. The colour preference leads to speciation as only the brightest red and blue fish survive, eventually forming two separate species.
Researchers using ERS-2's radar altimetry and InSAR found anomalies in ice-sheet surface elevation, suggesting large floods of water from deep within the ice may have generated huge floods that reached the ocean. The discovery raises concerns about ancient life in subglacial lakes.
Researchers have discovered rivers beneath the ice in Antarctica, moving water hundreds of miles under the surface. The findings suggest that these lakes could support microbial life and potentially release large floods that could affect ocean circulation.
A FSU study suggests that Jesus could have walked on ice in the Sea of Galilee due to a rare combination of optimal water and atmospheric conditions. The researchers calculated the odds of such an event occurring as roughly once in 1,000 years.
A University of Washington researcher found that salmon spawning can alter stream beds, releasing silt, minerals, and nutrients that impact nearby rivers and lakes. This
A Cornell University study reveals that male loons modify their yodels when switching territories, adopting a new call to signal dominance. This unique behavior has significant implications for conservation efforts and may inform the development of non-invasive bird identification methods.
Researchers have identified two large subglacial lakes in East Antarctica, which may harbor exotic ecosystems. Additionally, a study found that global sea levels likely rose by 195 millimeters between 1870 and 2004, with a rate of 1.7 +/- 0.3 mm/year.
Lake Victoria is losing water at an alarming rate due to the operation of Uganda's dams, which have released up to 55% more water than permitted. The lake is now at an 80-year low, with devastating effects on fishing communities and towns.
Scientists have identified two large subglacial lakes beneath the Antarctic ice sheet, 90ºE and Sovetskaya. These lakes are estimated to be around 2,000km2 and 1,600km2 in size, respectively, and are sealed beneath over two miles of ice.
Researchers create novel approach to tackle phase-change process, calculating critical point properties for the first time. The simulation findings match predictions and experimental results, including microgravity measurements on the Space Shuttle.
The North Magnetic Pole's movement may be part of a normal oscillation and will eventually migrate back toward Canada. Scientists tracked the pole's movement using sediment records from Arctic lakes, providing a reliable timeline and revealing a 'jerk' in the magnetic field every 500 years.
A new species of diatom, Hannaea superiorensis, has been discovered in Lake Superior, providing insights into the lake's environmental changes. The unique boomerang-shaped diatom is found in pincushion-like colonies attached to rocks along the shore.
Research highlights rapidly declining fish numbers in inland waters globally, with total catch quadrupling since 1950 and biodiversity at risk. Inland water fishing pressure shifts from species to species, leading to ecosystem collapse if left unmanaged.
The American Geosciences Institute announced the winners of its Earth Science Week 2005 contests. James Pugh won the Visual Art Contest with his drawing 'Volcanologists: It's a Hot Job,' while Robert Kendle took home the Essay Contest prize for his essay on paleontology and geoscientist aspirations.
Researchers found major increases in chlorophyll a concentration in six lakes on Baffin Island, indicating dramatic changes in ecosystem function. This increase occurred approximately 150 years ago, coinciding with the start of the Industrial Revolution and increased human impact on global atmospheric chemistry.
A study by Louisiana State University researchers has found that Katrina floodwaters were not as toxic as previously thought, but still contained high levels of certain metals and bacteria. The findings suggest that while the floodwaters posed some risks to human health, they were not the chemical catastrophe initially predicted.
Researchers discovered that closely related cichlid species use different subsets of visual pigments to shape their color vision. Each species primarily expresses three cone pigment genes encoded by its genome, allowing for unique adaptations to their environments and ecological niches.
A synthetic pheromone has been found to effectively control Great Lakes lamprey populations by attracting them to traps and sterilizing males. The pheromone, PADS, was isolated after 15 years of research and is expected to be environmentally friendly and less expensive than current methods.
Researchers document a significant shift from wetlands to woodland and forest in the Kenai Peninsula Lowlands due to climate change. The transformation threatens biodiversity, habitat loss for migratory birds, and increased wildfire risks.