Articles tagged with Limnology
Researchers identify subtropical lakes as natural laboratories for tracking biodiversity, water quality, and ecosystem resilience in a rapidly changing world. The study highlights the global scientific importance of these largely overlooked lakes, which can serve as 'sentinel ecosystems' revealing early signs of environmental change.
A new study reveals that forest-dominated rivers in China regulate nitrogen removal through a combination of microbial activity, water and sediment conditions, altitude, and land use. Denitrification was the dominant nitrogen-removal pathway, accounting for up to 95% of total measured nitrogen removal in winter.
A recent study reveals that over 90% of the Mar Menor's key nutrients degrading the ecosystem come from recirculated underground flows, not traditional sources like streams or groundwater. This discovery highlights a previously overlooked pathway of contamination and its impact on eutrophication episodes.
Climate change is projected to increase frequency and intensity of hydroclimatic whiplash events, with regions experiencing both floods and droughts. This may lead to increased flash flooding, water quality deterioration, and soil erosion, as well as challenges for flood and drought planning.
Dissolved black carbon's colloidal behavior can decide whether carbon and associated contaminants travel long distances or become trapped in sediments. Understanding this behavior is essential for predicting environmental risks and carbon cycling.
Small reservoirs worldwide are losing storage capacity at a rate of 7.3% per decade, affecting billions of people. The study identifies 16 global sedimentation hotspots and estimates that over half of global reservoirs may experience functional degradation by 2060.
Climate change is accelerating Himalayan river migration rates by nearly doubled, with increased risk of flooding, erosion, and damage. The study reveals that thawing frozen ground and glacier melt are driving these changes, posing implications for water security and infrastructure planning.
Research finds that warmer autumns delay lake freezing, leading to colder winter under-ice temperatures. Autumn surface waters have also warmed by an average of 1.85 °C, while large lake size and strong winds influence under-ice bottom water temperatures.
A field study found that adding biochar to estuarine wetlands increased sediment carbon storage while suppressing carbon loss. Tidal dynamics amplified the effectiveness of biochar as a climate solution by stabilizing carbon in sediments and reducing microbial activity associated with carbon decomposition.
Research by University of Missouri scientists found that road salt is deadly to freshwater snails when paired with the presence of predators, causing nearly 60% higher mortality rates. The study suggests practical solutions to reduce salt pollution in waterways, such as cutting road salt use by up to 50%.
A three-year study by the University of Stirling has shown that Himalayan balsam disrupts riverbank stability, causing erosion during high-flow periods. This leads to increased sedimentation, damaging habitats and wildlife, and changes to river shape and structure.
Researchers track benthic nutrient fluxes using a new device called CAROSEL, which measures nitrogen released from sediments in real-time. The findings reveal daily rhythms in oxygen fluxes and highlight the importance of understanding sediment-water interactions in managing aquatic ecosystems.
A Peking University study maps the hidden life of river carbon along the upper Yangtze River, revealing how landscape, fire, and sunlight shape the global carbon cycle. The research found that organic carbon changes as it travels from the river's high-altitude headwaters to its densely populated downstream reaches.
Researchers at Northern Arizona University have discovered a partnership between algae and bacteria that creates a clean-nitrogen machine, turning atmospheric nitrogen into food for river ecosystems. This discovery boosts populations of aquatic insects, which young salmon rely on for growth and survival.
New research reveals that lake littoral zones store more carbon than previously thought, highlighting the need for inclusion in global carbon budgets. By including these zones, lakes may switch from being net carbon sources to net carbon sinks.
Researchers from DTU found that a sustainable diet can allow for up to 255g of poultry or pork per week without harming the planet. However, moderate amounts of red meat exceed planetary boundaries. The study suggests that pescetarian, vegetarian, and vegan diets can be healthy and sustainable.
A Connecticut College professor has been awarded a $204,499 NSF grant to consolidate his research on protists, integrating decades of data to better understand their role in aquatic ecosystems and climate change. The project aims to provide critical insights into nutrient cycling, ecosystem stability, and species migration over geologi...
Researchers uncover calcite precipitation as the key mechanism behind Lake Geneva's significant CO2 emissions. The discovery provides a new understanding of the carbon cycle in lakes and has implications for global warming efforts.
New research predicts that seven of eight modeled species will move further north in the Arctic Ocean due to climate change. This shift could have cascading effects on Arctic Ocean fish populations and overall ecosystem dynamics.
A new method for desalinating seawater using hydrate-based desalination technology has been developed, offering a low-energy solution for producing freshwater. The research team calculated optimal temperatures for enhanced efficiency, with maximum water yields reaching up to 67% in certain brine concentrations.
The 2024 Ocean Sciences Meeting brings together 5,000 scientists to discuss breaking research and critical issues affecting ocean sustainability. The biennial event will feature an online-only scientific session on Wednesday 21 February.
A recent study using SENTINEL-2 satellite images estimated burned areas with 96% accuracy, revealing a much larger area affected by wildfires than previously thought. This higher precision will help improve estimates of greenhouse gas emissions and inform fire management decisions.
A Virginia Tech study found that hellbender fathers are more likely to eat their eggs in deforested areas, leading to a drastic increase in filial cannibalism. The research suggests that protecting and re-establishing forest cover around streams is crucial for the species' survival.
A new Dartmouth study examines how changes in precipitation and temperature due to global warming affect streamflow and flooding in the Northeast. The research finds that a warmer climate will lead to increased streamflow and higher flood risk, particularly if soils become wetter and more prone to heavy rainfall events.
Researchers argue that polders are an important part of China's water heritage, reflecting the country's long history of water management. Over 2,500 years, polders have evolved in response to changing societal needs, adapting to agricultural modernisation and urban encroachment.
The study found that stream gauges are disproportionately located in large rivers and human-occupied watersheds, but sparsely distributed in protected areas and non-perennial rivers. This is critical information for freshwater conservation and water security concerns.
Researchers have developed a model to predict Vibrio vulnificus abundance in the canal by analyzing rainfall, water temperature, dissolved nutrients and organic matter. The study found that warmer waters due to climate change may lead to an increase of twice or three times current levels of bacteria by the end of the century.
Predator species help mitigate against loss of biodiversity and ecosystem destabilization caused by heatwaves. Algal communities in freshwater streams were found to resemble each other more closely when predators were absent, highlighting the importance of conserving top predators.
A study published in Biology Letters reveals a drastic fall in the number of aquatic insects in the Paraná River basin due to dam construction. The research, conducted over 20 years, found that dams alter the nutrient balance and provide a clearer water environment, making insects more vulnerable to predation.
The study reveals that Chlamydomonas reinhardtii undergoes mutations leading to the emergence of multicellular life. The experiment confirms a theory on the origin of multicellularity, where cell groups are better at reproduction and more likely to survive than single cells.
Researchers are establishing a global volunteer network to track the abundance of dragonflies and damselflies, crucial indicators of environmental changes in freshwater biodiversity. The network aims to fill gaps in knowledge by collecting standardized data over 10-15 years from citizen scientists worldwide.
Researchers assess proposals for water roads in Chile, considering impacts on ecosystems and human consumption amid climate change and water scarcity
In a recent study, male Trinidad Guppies were found to reach more novel food patches when in the presence of females. In contrast, female foraging was independent of male presence. The researchers suggest that life in a group can be advantageous, allowing individuals to share information and find food more easily.
Chinese fossils contain at least 28 insect families and diverse beetles, suggesting a radiation of Holometabola during the Middle Triassic. The discovery provides new insights into the early evolution of freshwater ecosystems.
Researchers are studying microplastics in freshwater and terrestrial systems to understand their impacts on human health. Early evidence suggests that microplastics may travel via soil and atmospheric deposition, highlighting the need for a global approach to addressing microplastic pollution.
A study by researchers found that a small group of countries control most of the world's freshwater trade, while regions like Africa are left out. The virtual water network has almost doubled in size since the 1980s, driven by globalization and economic factors.
The new journal, published online-only, focuses on interdisciplinary limnology and oceanography research exploring the link between fluid dynamics and aquatic system processes. ASLO members receive free access, with select articles available open-access.
A 'hot spot' for toxic harmful algal blooms has been discovered off the Washington coast, where microorganisms can trigger harmful blooms that force shellfish bed closures.
Researchers at Harvard University discovered that bdelloid rotifers are extremely resistant to ionizing radiation, surviving doses much higher than other animal species can tolerate. The findings could lead to new research into the role of free radicals in inflammation, cancer, and aging.
Researchers from the University of Alberta have recorded alarming evidence that Arctic ponds are drying out rapidly, affecting waterfowl habitats and biodiversity hotspots. The study, published in PNAS, reveals a drastic shift in water levels and chemistry over 24 years, consistent with increased evaporation and warmer temperatures.
Researchers found shrimps detect trout chemical odour from upstream by creating tiny currents. This strategy allows shrimps to escape brown trout ambushes. Shrimps can sense trout presence through vision but not smell, and create backflow to avoid predation.