Articles tagged with Aquatic Ecology
A new approach to aquatic pathogen surveillance combines automated sampling, pathogen concentration, and rapid signal detection for real-time monitoring of multiple pathogens. The proposed framework complements traditional methods, improving biosafety and early warning systems.
A new review highlights the need for stronger evidence before claiming microplastics affect aquatic offspring through maternal transfer. The study proposes an evidence classification framework to distinguish true maternal particle transfer from intergenerational and transgenerational toxicity.
Researchers identified 33% of rivers and streams rated above-average for resilience, concentrated in Pacific Coast, Northern Rocky Mountains, and Great Lakes areas. Conserving 35% of waterways could sustain biodiversity, but only 6% is currently protected and resilient.
An international team reconstructed a 1,000-year timeline documenting human impact on the ecosystem surrounding Crawford Lake. The analysis of sedimentary ancient DNA samples revealed changes in plant, animal, and microbial communities over the centuries.
Researchers found that fish serotonin transporters, similar to human counterparts, can be highly sensitive to antidepressants found in water, highlighting potential risks to aquatic life. The study suggests prioritizing specific pharmaceuticals in environmental monitoring programs and deriving species-specific risk thresholds.
Researchers found that fish in cloudy water take longer to find food, but individuals in larger groups respond more quickly overall. Sticklebacks change their shoaling behavior to compensate, becoming more coordinated and finding food faster.
A new study finds that rain falling through wildfire smoke can deliver unusually large bursts of nitrogen, phosphorus, and potassium to ecosystems in the United States. The nutrient pulses could become an increasingly important ecological consequence of fire as wildfires become more frequent.
New research reveals that shipwrecks from WWI and WWII are leaking toxic chemicals into the North Sea, polluting the local ecosystem. The wrecks, including the German submarine UC-30, contain explosives that are harming starfish, mussels, and other marine life.
Cool river temperatures in first 15 days after fertilization are crucial for survival, with warm years limiting survival. Research suggests strategies like reintroduction to historical habitat may be more effective in the long run than targeting specific cold water releases.
Researchers used eDNA metabarcoding to study fish biodiversity in heavily damaged mountainous cascade dammed rivers. The study found 97 fish species, including 14 IUCN threatened taxa, with seasonal differences in species detection rates and community composition.
Pyrogallol's toxicity in aquatic organisms has been linked to oxidative stress and damage across multiple biological systems. The analysis identifies the need for broader environmental surveillance, long-term ecological studies, and improved exposure assessment to determine its effects on human health.
Researchers analyzed millions of high-frequency turbidity measurements to reconstruct daily sediment movement, revealing a major shift: Rivers are becoming more 'bursty', with a 20-day decrease in the time it takes to transport 90% of their annual sediment. This change can overwhelm water treatment systems and damage aquatic habitats.
Researchers discovered a strong link between environmental variation and thyroid hormone signaling in reef fish, enabling them to adapt to changing habitats. The study found that habitat impacts development by altering gene expression and metabolic profiles, giving animals more flexibility when their environments change.
A new synthesis paper examines how ecological structures and processes help ecosystems withstand disturbances while providing benefits. The study highlights the importance of 'portfolio effects' in maintaining ecosystem resilience.
Researchers have identified Ruppia maritima as a resilient native seagrass species that can help restore degraded estuarine habitats. The species has a distinctive annual life cycle and a persistent seed bank, allowing it to persist through disturbance and regenerate when conditions improve.
Researchers used Landsat thermal infrared imagery to study river temperatures over 250 dams in the US, finding temperature differences in 71% of observations and varying impacts based on dam type and season. This new approach can help better understand freshwater ecology and water resource management.
A new study has mapped Europe's wetlands, identifying peatlands as the most critical type to restore for climate benefits. The map provides a basis for assessing where wetland restoration could deliver benefits for climate and biodiversity.
Researchers developed a high-resolution monitoring approach combining drone-based multispectral imaging with ensemble machine learning models. The method revealed how surrounding industrial, agricultural, residential, and green areas influence water quality in urban rivers.
New research shows that tadpoles adapt their diet in response to rising temperatures, consuming more plant material and eating overall. However, this natural strategy becomes less effective as temperatures continue to rise, with consequences for growth, development, and survival.
A new study analyzes geographic biases in telemetry research, finding that most studies are conducted in politically stable, English-speaking countries with high conservation funding. The research emphasizes the need for in-country capacity sharing and collaboration to ensure biodiversity hotspots are not left understudied.
Researchers found that wood frogs' adaptation to salty water increases their vulnerability to ranavirus, a common and fatal disease. The study highlights the hidden costs of survival in wildlife under environmental stress.
The University of North Florida Institute of Environmental Research and Education is assessing the impact of road-stream crossings on river systems. The project aims to improve aquatic connectivity and strengthen coastal resilience, providing valuable insights for regional planning and flood hazard reduction.
A global analysis of fish biodiversity in rivers reveals that warmer climates and larger catchment sizes are associated with increased biodiversity. However, human activity weakens this relationship, particularly in smaller river catchments. The study demonstrates the potential of environmental DNA as a tool for rapid, large-scale biod...
The FAU Queen Conch Mobile Lab has successfully hatched its first queen conch egg masses and juveniles, marking a significant milestone in the conservation of this iconic Caribbean species. The lab, designed to grow up to 2,000 juvenile queen conchs annually, will support restoration efforts throughout the region.
A team of researchers discovered a new shark species, Hemiscyllium dudgeonae, off the coast of Papua New Guinea. The nocturnal species is the 10th in the PNG epaulette genus and has been found to have distinct color patterns and geographic distributions.
Researchers developed a cobalt manganese spinel catalyst regulated by biochar to activate peroxymonosulfate, achieving higher degradation rates and improved selectivity than traditional systems. The new CoMn0.75/BC system showed strong practical potential, maintaining high imidacloprid removal efficiency across various pH ranges.
Researchers identified tens of millions of small wetlands globally and found they produce a significant impact on methane emissions. Small wetlands have been difficult to detect due to their size, but high-resolution satellite imagery has revealed their substantial contribution to the world's total non-forested wetland emissions.
A new study suggests that balancing wetland conservation with economic development is possible through a locally adjusted policy featuring both tradeable offsets and taxes. The study estimates that this approach would retain two-thirds of private gains from trade while preventing about $1.6 billion in flood damage.
Researchers found that reef manta rays stay within 10km of their tagging site during monsoons, expanding their vertical use of the water column rather than traveling long distances. This suggests they can change behaviors to adapt to ocean conditions and protect themselves from threats like overfishing.
Researchers used DNA metabarcoding to analyze benthic macroinvertebrates across 18 Ontario streams, detecting far greater biodiversity than traditional methods. The study found that DNA-based biomonitoring can reveal ecological patterns and changes linked to agriculture, water quality, and land use.
Scientists have documented humpback whales travelling over 14,000km between their breeding grounds in eastern Australia and Brazil, setting new records for the greatest distances ever confirmed. The findings highlight the value of citizen science and suggest climate-driven changes may be making such crossings more likely.
A new study reveals that nitrogen enrichment is significantly reducing the abundance and variety of marine life in UK coastal ecosystems. The research found a strong association between higher nitrogen concentrations and a decrease in animal abundance and species richness.
Researchers have developed a technique to analyze DNA from water samples to track species, detect pollution, and monitor ecosystem health. The technology identifies DNA from various organisms, including fish, amphibians, mammals, and even leatherback sea turtles.
The eDNA-bot revolutionizes biological monitoring by providing comprehensive results at lower cost than conventional surveying methods. It can detect elusive species and monitor wastewater for pathogens, streamlining environmental assessments in hydropower licensing.
A recent study by Rheinland-Pfälzische Technische Universität Kaiserslautern-Landau found that light pollution significantly alters the composition of predatory spiders' diets, leading to reduced hatching of insects. The invasive signal crayfish also contributes to altered feeding behavior under nighttime lighting.
A recent study by researchers at Griffith University and others found that exposure to cocaine contamination altered the movement patterns of Atlantic salmon in Lake Vättern, Sweden. Fish exposed to benzoylecgonine swam up to 1.9 times farther than unexposed fish, with dispersal distances reaching up to 12.3km.
A new study reveals that freshwater fish are accumulating antidepressants, opioids, and other drugs of abuse in their bodies, which can alter their behavior, development, and reproduction. The research uses a novel analytical method to detect these substances in small fish living in rivers receiving urban wastewater.
A global inventory reveals that bottom trawling catches over 3,000 fish species, including critically endangered and vulnerable species, highlighting the urgent need for better documentation and management of its impacts on marine biodiversity.
A 37-year study by the Smithsonian Environmental Research Center found that cannibalism is the primary killer of juvenile blue crabs in mid-salinity waters. However, young crabs can escape predation by migrating to shallow waters, where they are safer from adult crabs and other predators.
The Global Coral Tech Transfer Project brings together SECORE International, Australian Institute of Marine Science, and FUNDEMAR to share coral breeding techniques and technologies for large-scale restoration. The partnership aims to create a comprehensive toolbox for boosting reef resilience worldwide.
A large-scale study found that human activity is consistently changing the ecosystems of Northern European lakes, altering food webs and affecting salmonid fishes. The research used stable isotopes to examine the impacts of hydropower and human modification on lake environments.
A global analysis of over 40 years of scientific research reveals that vessel traffic affects animal behavior, communication, and stress physiology in marine megafauna. The study identifies stronger responses from species like sea turtles and weaker impacts on others, such as large fishes and sharks.
A new study explores how artificial lighting at night shapes ecological and genetic patterns of two closely related isopod species, Ligia laticarpa and L. furcata, in Tokyo Bay. The research reveals a clear ecological boundary between the two species, consistent with patterns of urban illumination.
A computer model identifies potential threats to over 10,000 freshwater species worldwide, offering a cost-effective way to safeguard species before they become endangered. The tool analyzes 52 variables, including damming, pollution, and habitat degradation, to recognize ecological patterns that benefit multiple species at once.
Research at University of Eastern Finland found that positively charged polystyrene nanoparticles increase early embryo mortality in European whitefish under stressed conditions. The study suggests that surface charge plays a critical role in toxicity assessment, with negatively charged particles experiencing reduced harmful effects.
AI language models can extract and integrate information from vast amounts of unstructured environmental data, identifying pollutants and their toxic effects. While still in its early stages, the application of LLMs in aquatic risk assessment has the potential to support more dynamic and data-driven risk management strategies.
Neotropical otter study reveals 40 years of field data showing that otters aggregate environmental signals across time and space. The study highlights the critical Tropical Knowledge Gap in otter research, with 70% focusing on temperate species.
Temperature impacts the quality and speed of male frogs' mating calls, which are more attractive to females in warmer conditions. This study suggests that female frogs use these calls to gauge environmental suitability for reproduction.
A UT San Antonio assistant professor is studying how climate change and urbanization affect freshwater ecosystems by tracking the expansion of exotic tropical fish species into northern regions. The project aims to provide practical tools for natural resource managers to protect Texas waterways.
A new study by University of California San Diego researchers found that fossil fuel plastics can amplify harmful algae blooms by killing off zooplankton, leading to an increase in algal concentrations. In contrast, biodegradable plastics had a smaller impact on zooplankton and algal communities.
A new study reveals how beluga whales in Alaska's Bristol Bay survive through a surprising strategy: they mate with multiple partners over several years. This polygynandrous system helps maintain genetic diversity despite the population's small size and isolation.
Researchers captured underwater photos of seabirds, seals, and fish interacting with a small tidal turbine in Washington State. The study provides valuable information on the impact of tidal turbines on marine life. Marine animals were observed swimming, feeding, and even playing around the turbine
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.
The US has more than 4 million miles of rivers, but existing regulations only account for less than 20% of total river length. Freshwater conservation strategies have historically focused on land use and development, leaving gaps in protection measures for lakes, rivers, and wetlands.
Researchers from OIST found that the Late Ordovician Mass Extinction drove an unprecedented richness of vertebrate life, with gnathostomes dominating all others. The study linked the mass extinction pulses to increased speciation after millions of years, highlighting their role in shaping the evolution of vertebrates.
A study published in Nature Geoscience reveals that the end of the last ice age coincided with the emergence of salty water trapped in the deep ocean. This 'salty blob' played a crucial role in locking away carbon dioxide, which contributed to lower average temperatures.
Scientists discovered 14 new species of denitrifying endosymbionts in wastewater, which contribute to nitrate removal and help hosts generate energy. However, one species produces nitrous oxide, a potent greenhouse gas, with widespread global distribution.
A study found that a global pandemic is quietly wiping out sea urchins around the world, with populations nearing local extinction in the Canary Islands. The 2022-2023 mass mortality event affected the entire population of the species across the archipelago, causing a 74% decrease in La Palma and a 99.7% decrease in Tenerife.
A review of scientific literature reveals that artificial beaver dams can make waterways more resilient to climate change, increasing water storage and enhancing flood-plain connectivity. The practice has shown promise in improving fish habitat and contributing to fish-population growth.
Penguin populations off South Africa have declined drastically due to collapsing food supplies, with some species facing an estimated 62,000 breeding individual losses. The study suggests that sardine biomass has fallen below a quarter of its peak levels in 17 years, posing a significant threat to the long-term survival of these birds.