Articles tagged with Aquatic Ecosystems
Scientists from Okayama University used environmental DNA (eDNA) to survey the distribution and population density of the endangered bitterling fish in Japan. They found that eDNA concentrations vary according to the downstream channel distance, providing a reference for conservation surveys.
A single test can now identify all three genotypes of the Infectious Spleen and Kidney Necrosis Virus (ISKNV), a deadly virus that primarily affects fish. The development of this test has significant implications for fisheries and aquaculture, as ISKNV poses a substantial threat to these industries.
A new species of aquatic insect, Potamophylax humoinsapiens, has been discovered in the Sharr Mountains of Kosovo. The species was named to raise awareness about human activities that have degraded habitats and led to extinction. Researchers hope this naming convention will make insects 'talk' to humanity's collective consciousness.
A recent study by University of Washington researchers found that climate 'presses' and 'pulses' have equal importance on Magellanic penguin population survival. The team analyzed nearly four decades of data at Punta Tombo, Argentina, revealing a decline in breeding pairs from 400,000 to 150,000 between the 1980s and 2019.
A team of researchers at the University of Nebraska-Lincoln has discovered that certain microorganisms, such as Halteria, can eat high numbers of chloroviruses, which are known to infect green algae. This finding suggests that virovory, a virus-only diet, can support physiological growth and even population growth in an organism.
A WVU engineer has developed a technology that can treat urine on site rather than at a centralized wastewater treatment facility, allowing for the recovery of nitrogen as a valuable fertilizer. The approach enables quick treatment and promotes the reduction of nutrient discharge into lakes and rivers.
Research from Aarhus University found that melting glaciers release around 10,000 microorganisms per millilitre of meltwater, leading to estimated annual releases of over 100,000 tonnes of carbon-dense microorganisms to surrounding ecosystems.
The River Thames ecosystem has suffered a drastic decline in mussel numbers since the 1960s, with native species dwindling to nearly nothing. The invasive zebra mussel and Asian clam have also taken hold, further threatening biodiversity.
A new review highlights the lack of understanding about non-game native transplant (NGNT) fish in the US, which can have significant impacts on ecosystems. Researchers urge anglers and aquarium hobbyists to take steps to prevent NGNT invasions, such as not releasing bait fish into different watersheds.
New research reveals a relationship between virus concentration and organic carbon in wastewater treatment plant effluents. The study found that viruses can affect the concentration of organic carbon, leading to potential negative impacts on aquatic ecosystems nearby.
A study has mapped streamflow alterations across the continental US, using measurements from over 7,000 stream gauges. The dataset provides valuable data for determining societal impacts on ecosystems and setting environmental flow standards.
The University of Guam is conducting a four-person research team's study on the genetics of corals from the Northern Mariana Islands to understand coral population connections, diversity, and adaptations. The study aims to identify potential reserves for declining reefs and assess the impact of warming waters.
Researchers analyzed 843 beach surveys to find that certain beaches and areas accumulate litter in predictable patterns. The study found that beaches with more organic flotsam tend to have more litter, and that litter on the outer coast shows a strong seasonal pattern.
A new study analyzing 72 lakes in four large Neotropical wetlands of Brazil reveals that human impacts on biodiversity compromise wetland multifunctionality. Strong associations between aquatic organism diversity and wetland functioning were found, highlighting the crucial role of species richness in driving ecosystem health.
Researchers investigate how foraging adaptations affect Arctic charr resilience to climate change. The team aims to develop a framework linking genetic and malleable components of feeding trait diversity to population demography, habitat, and eco-evolutionary potential.
A global survey of biodiversity experts finds that more species are threatened with extinction than previously thought, with estimates suggesting 30% of species have been lost since 1500. The study identifies climate change, pollution, and land-use changes as key drivers of biodiversity loss.
Great White Sharks have been avoiding a South African coastal region due to the presence of Orcas. Long-term sightings and tagging data show that Great Whites flee areas with high Orca activity, adopting a 'flight' strategy reminiscent of wild dogs in response to increased lion presence.
Researchers discovered that copper availability affects the release of nitrous oxide, a potent greenhouse gas. When copper is not available, microbes release more harmful gases instead of nitrogen, which makes up 78% of Earth's atmosphere. By adding metal to natural systems, it may mitigate nitrous oxide release.
Southern right whale mothers choose shallow nursery sites in 30-foot-deep waters to minimize predator detection, allowing them to communicate securely with their calves. This habitat selection behavior is a new form of acoustic crypsis, reducing the risk of being overheard by predators.
A team of scientists led by Dr. Matthew L. Niemiller has rediscovered the Shelta Cave Crayfish, a rare and ancient species thought to be extinct for 30 years. The discovery was made in a cave system in northern Alabama and highlights the importance of conservation efforts to protect threatened species.
Researchers evaluated the toxicological effects of BaP on bay scallops, finding increased immune response-related parameters with time at higher concentrations. The study suggests that BaP dampens the immune response of scallops and decreases their capacity to respond to oxidative stress.
Two new species of Amazonian fish have been discovered and described by Smithsonian researcher Murilo Pastana, one with vibrant red-orange fins and another that is technically a miniature fish. The species are at risk of extinction due to deforestation in the region where they inhabit.
Researchers monitored mercury levels in artificial lakes to identify sources and factors affecting concentration. Most mercury originated from soil in catchment areas, with surface runoff contributing in shorter-residence time reservoirs.
A new project led by INRS will assess how living organisms respond to reduced pesticide use, focusing on soil and water health. The study aims to provide a clear understanding of the benefits and limitations of reducing pesticide use in sustainable farming.
A study by researchers at the University of Plymouth reveals that energy-efficient broad spectrum lighting is reducing the efficacy of coastal species' camouflage. This can have significant impacts on visually guided ecological processes, with certain color variations being more vulnerable to detection.
Researchers at UBCO's School of Engineering have developed a new, faster method for analyzing toxic waste materials using fluorescence spectroscopy and convolutional neural networks. This method can detect key toxins such as naphthenic acids in oil sands samples, providing a low-cost alternative to current methods.
A University of Florida study reveals that ponds in urban landscapes emit significantly more carbon than they store, with younger ponds contributing the most to atmospheric emissions. Researchers hope this finding will inform policy makers and others about when, where, and how to install stormwater ponds.
Scientists identified a new plant growth-promoting bacteria (PGPB) that enhances duckweed biomass productivity by 2.7-fold, increasing photosynthesis and wastewater treatment efficiency. The molecular mechanism suggests that organic compounds are transferred from the bacteria to duckweed, triggering an increase in photosynthetic activity.
The DNAqua-Net team developed a practical guide for implementing DNA-based biomonitoring tools, considering four sample types and two primary analysis types. The guide sets out scientific consensus and trade-offs, addressing logistics, time, and budget constraints.
Researchers observed diverse aquatic biota in post-flood communities, with changes in flow dynamics and water chemistry supporting biological adaptation. The study highlights the role of floods in shaping floodplain ecosystems.
Research reveals that warm-water habitats in Upper Klamath Lake provide essential energy for cold-water fish during spring and fall, while providing limited food sources in summer. The study highlights the importance of considering multiple habitats for mobile species like redband trout in climate change conservation.
Researchers used mathematical models to reconstruct evolutionary history of photosymbiosis in Scleractinia, identifying groups where association is stable and others that may be more flexible. The study found that certain lineages are more likely to retain the reef-building trait in a changing climate.
A study in the Atlantic Rainforest detected high mortality rates among tiny frogs known as pumpkin toadlets infected with the chytrid fungus. The infection causes a physiological imbalance leading to death from a heart attack. Climate change and drought may exacerbate the threat to terrestrial amphibians.
Researchers found that most anglers weren't thinking about how invasive species could affect their own lives, highlighting the need for personalized messaging. Tailoring education campaigns to an angler's values and risk perceptions can motivate action, such as decontaminating boats or attending cleanup events.
A new study projects that marine heatwaves will wipe out hundreds of thousands of tonnes of fish available for catch in a country's waters by the century's end. Researchers warn that extreme temperatures will exacerbate impacts on fisheries and human communities, leading to significant job losses.
Researchers found that additives in commercial shopping bags boost the conversion of solid plastics into water-soluble compounds under sunlight. The compounds vary depending on the additives used, with some bags releasing up to 15,000 dissolved compounds.
Researchers found fecal contamination in Montana's Absaroka-Beartooth Wilderness Area, primarily attributed to wildlife and pack animals. Human-associated bacteria were detected at lower levels, but not significantly related to landscape or elevation.
A new study predicts that climate change will cause a sudden shift in algae distribution pole-wards over the next 100 years, affecting marine ecosystems. The UK is among the areas most likely to be severely impacted due to its warm waters, with changes potentially occurring before previously thought.
A study published in PLOS Biology suggests that microparticle concentrations in lakes are higher than previously reported and can be predicted by surrounding land use. The researchers found that areas with more human activity and lower forest cover had higher microparticle concentrations, while lakes with more active microorganisms had...
Researchers successfully detected local mammals and birds by collecting 18 litres of water from a two-kilometre stretch along the river Mulde. The team identified 50% of fish species, 22% of mammal species, and 7.4% of breeding bird species in the region.
The Khaled bin Sultan Living Oceans Foundation has completed the largest coral reef survey and mapping expedition in history, assessing over 1,000 reefs in 16 countries. The Global Reef Expedition provided a comprehensive dataset for coral reef conservation, highlighting the status and major threats to these ecosystems.
A new study reveals that dams in California do not adequately replicate natural thermal patterns, making them incapable of supporting cold-water species effectively. Key cold-water conservation candidates include streams highly influenced by groundwater and places where water easily infiltrates the soil.
A new study by Ohio State University provides the most accurate estimates of microcystin toxins in Lake Erie's western basin, revealing fluctuating concentrations over short distances. The research emphasizes the importance of frequent data collection to improve water safety and forecasting for the lake's estimated 11 million people.
A study by University of Florida scientists found that crayfish exposed to low levels of antidepressant medication behave more boldly, emerging from hiding earlier and spending more time searching for food. This altered behavior could have a ripple effect on stream ecosystem functions.
The nationwide monitoring programme found significant pesticide contamination in over 80% of water bodies, exceeding governmental thresholds. The loss of biodiversity can only be halted if the environmental risk assessment of pesticides is radically revised.
Research highlights biodiversity's crucial link to micronutrient-rich seafood diets, essential in combating 'hidden hunger' and meeting UN Sustainable Development Goals. Preserving aquatic ecosystem biodiversity locally and globally is vital to fulfill nutritional requirements.
Scientists combined environmental DNA and hydrological models to assess riverine ecosystems' biodiversity with unprecedented accuracy, identifying unseen hotspots for conservation strategies. The new method enables rapid application of research findings in Switzerland, finalizing guidelines for the Federal Office for Environment.
Researchers have developed a new method for estimating fish populations by analyzing environmental DNA in water. The approach, which accounts for the degradation of DNA molecules, has been successfully tested in Japan and shows promise for quantitative monitoring of aquatic ecosystems.
A recent study found that the burrowing mayfly population has declined by nearly 84% since 2015, mirroring a decrease in mayfly swarms during annual insect emergence events. This decline is attributed to human stressors such as climate change, runoff from agricultural land, and pesticide use.
Some native plant species can grow aggressively, outcompeting other native species and forming dense monocultures, resulting in ecosystem disruptions. Excessive growth of aquatic plants can inhibit water movement and negatively impact flood control operations.
A researcher is studying how carbon moves through landscapes and across land-water boundaries, exploring its impact on water quality and freshwater food webs. The goal is to understand the fate of terrestrial carbon and improve global carbon budgets.
Salinization affects biodiversity and water ecosystem functioning directly, but more baseline information is needed to predict its effects. The main causes of salinization in Spain include mining, agriculture, and regime changes in precipitations.
Researchers found that high biodiversity increases individual stability components, but at a cost: biomass production fluctuates more with diverse species. Non-linear connections between diversity and stability highlight the need for nuanced management strategies.
University of Montana researchers discovered that ecosystems' carbon balance depends on water availability and annual precipitation thresholds. The study suggests climate models need improvement to accurately predict terrestrial carbon dynamics.
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.
A recent study using eDNA sequencing identified aquatic plant diversity in ponds, offering a new approach to ecological surveys. The study found that pondweed diversity had been underestimated at a reserve in Ontario, detecting three previously unknown species.
A study published in Nature Communications reveals that hippo waste can cause fish kills in Africa's Mara River due to depleted oxygen and nutrient levels. The research monitored water chemistry and flow downstream from 171 hippo pools over three years, finding that flushing flows can reduce dissolved oxygen concentrations.
Scientists discovered that Parisian street gutters are home to a diverse community of microorganisms, including eukaryotes such as algae, fungi, sponges, and mollusks. The researchers identified over 6,900 potential species in the water and biofilms collected from various districts of Paris.
A new study by NIOO-KNAW ecologist Bart Grutters suggests that exotic water plants can be a valuable asset in aquatic ecosystems, offering similar benefits to indigenous species. The research found that properties such as chemical defences and stem rigidity should be considered when evaluating the impact of exotic species.
Researchers found that landscape age and topography are stronger predictors of available phosphorus than rock type. As climate change impacts the McMurdo Dry Valleys, increased mineral phosphorus availability could support the growth of microscopic organisms.