Articles tagged with Freshwater Ecology
A recent study found that sucralose affects the behavior of cyanobacteria and diatoms in aquatic environments. Sucralose concentrations increased freshwater cyanobacteria population but spiked and crashed brackish cyanobacteria population, while diatom populations decreased across both freshwater and brackish water sites.
Climate change projections suggest that land-locked lakes on the Tibetan Plateau will increase in volume fourfold by 2100, leading to significant land loss and related impacts. This could alter the landscape, affect wildlife migration routes, and exacerbate climate change through increased greenhouse gas emissions.
Researchers have discovered that complementary genes in bacteria and algae living in the same algal colonies coordinate the use and movement of nutrients within the colony. This discovery could lead to new ways to prevent harmful algal blooms, improving water quality and habitat for aquatic organisms.
A new study by the University of Plymouth found that saturated soils in upland regions could negatively impact the survival rates of young oak saplings and acorns. The research highlights the importance of considering soil conditions when creating temperate rainforests to combat climate change.
Climate change threatens freshwater habitats, disrupting microbial communities essential for nutrient cycling and water quality maintenance. Many abundant freshwater bacteria with small genomes experience extended periods of adaptive standstill, limiting their ability to adapt to changing environmental conditions.
A new landscape evolution model suggests that the first humans in Australia migrated rapidly across the continent following riverine corridors and coastlines. The study identifies areas of archaeological significance and provides insights into the impact of climate-driven geography on human dispersal.
A mysterious plasmid, pBI143, found in 90% of human intestines, could be used to identify faecal contamination and offer insights into intestinal diseases. The discovery also highlights the prevalence of 'cryptic' plasmids in human gut microbiota.
Researchers found that salt marsh restoration can reduce flood risk, preserve habitats, and provide recreational opportunities. The study also emphasizes the importance of integrating nature-based solutions into comprehensive climate resilience strategies to mitigate future climate change impacts.
A review of current research on Australia's non-perennial rivers highlights the need for a new type of research attention due to emerging threats from climate change and human impacts. The study emphasizes the importance of addressing knowledge gaps to preserve and protect these vital waterways.
A new water quality analysis technique can detect organic chemicals in rivers and lakes, identifying their source and predicting their impact. This method uses high-resolution mass spectrometry to analyze water samples within an hour, providing a comprehensive overview of all organic molecules present.
Zooplankton biomass and behavioral patterns have been altered by human-driven changes in water temperature and food webs. The study found that warming temperatures and invasive species modify the timing of certain events in their life cycles.
Excavations at La Marmotta, Italy, uncovered five Neolithic canoes dating between 5700-5100BC, featuring advanced construction techniques. The discovery provides invaluable insights into early navigation and the technological sophistication of ancient communities.
Numerical models help assess ecological impacts of climate change on lakes by simulating changes in phytoplankton composition and community stability. The study found that warming increased seasonal variability in phytoplankton, leading to reduced overall evenness and increased species loss over time.
Researchers studied Prorocentrum cordatum to understand its molecular processes, revealing a unique photosynthetic machinery that may help it adapt to changing light conditions. The findings could lead to improved understanding of harmful algal blooms and their role in climate change.
A new study reveals that walleye are struggling to survive in warming waters of the Midwestern United States and Canada. Climate change is disrupting the historical pairing of ice-off and walleye spawning, which threatens the persistence of walleye populations across the Upper Midwest.
Scientists at UKCEH developed a robust method to detect and measure toxic chemical 6PPD in river sediments, which has been linked to salmon and trout deaths. The method uses gas chromatography mass-spectrometry techniques to accurately quantify 6PPD concentrations.
A 10-year study monitored the recovery of macroinvertebrate communities after a red sludge disaster in Hungary, finding that severe disturbances hinder long-term recovery. Community recovery dynamics were found to vary with disturbance severity.
Research finds invasive trout compete with native white-spotted charr for aquatic prey. Brown trout also influence ecosystems by preying on terrestrial organisms, further harming native populations.
The study observed that invasive Bluegill in Lake Nojiri, Japan, displayed unique colony spawning behaviors, with males constructing nests in close proximity to each other. Removal of guarding males revealed four brood predator species, with conspecific Bluegill constituting over 90% of all predators.
A study found that primary care physicians spent nearly 30 minutes more on EHR tasks between pre-pandemic and final year, with time spent outside of scheduled hours increasing significantly. This growth in EHR workload may contribute to burnout and affect decisions to cut back on clinic time or leave the profession.
A Hungarian study reveals that pond networks rely on spatial position for species diversity, with central connections hosting higher microorganism and plankton diversity. This research highlights the importance of connectivity in maintaining biodiversity in fragmented ecosystems like bomb crater ponds.
Researchers constructed the most complete map yet of the microbial communities in Yucatán's underwater caves, revealing distinct patterns and a core set of organisms performing key roles. The study found that Comamonadaceae, a family of bacteria typically found in groundwater systems, lived in several niches across the cave system.
A study of European river systems from 1969-2020 found that freshwater biodiversity improved until the 2000s but stagnated since then. The researchers attribute this decline to diminishing effectiveness of existing measures and emergence of new pollutants, climate change, and invasive species.
A recent study found that three freshwater fish species, including the buffalofish, have known lifespans greater than 100 years, which could open doors to aging studies across disciplines. The research reveals unique insights into the species' longevity and potential implications for gerontology.
A research project involving citizens in flood-prone areas improves data collection and increases resilience. The methodology shows a combination of digital technologies, participatory methods, and co-production of new understandings to enable just and sustainable transformations.
A study by the University of the Basque Country found that even highly diluted wastewater from treatment plants can exert significant effects on stream communities, reducing invertebrate diversity and altering trophic networks. The researchers emphasize the need for more stringent treatments to conserve freshwater food webs.
Research finds that water movement between lakes can transport environmental DNA, making eDNA a promising tool for tracking aquatic species and monitoring biodiversity. The study highlights the importance of considering landscape connectivity when designing eDNA surveys to ensure accurate biodiversity assessments.
A comprehensive study reveals a stagnation in European freshwater biodiversity recovery, highlighting the need for intensified mitigation strategies. The analysis of 1,816 time series of freshwater invertebrate communities between 1968 and 2020 shows promising increases until the 2010s, but a significant slowdown since then.
Researchers study microhabitats in Lake Tisza and find that diverse macrovegetation supports unique microhabitat diversity for benthic diatoms. Water management planning is crucial for maintaining biodiversity in multipurpose lakes.
A new study by Goethe University Frankfurt found that effluents from treated wastewater treatment plants alter invertebrate communities in Hesse's waters. Pollution-tolerant taxa like worms and crustaceans increase, while sensitive species like stonefly and caddisfly larvae decline.
University of Wyoming researchers found that trout in Wind River Mountains lakes have adapted to their environment, showing rapid evolution. The study reveals a change in gill rakers, likely related to food sources, and highlights the importance of eco-evolutionary interactions.
A study by Florida Atlantic University's Harbor Branch Oceanographic Institute found domoic acid toxin in 87% of samples from the southern Indian River Lagoon, which can harm shellfish, finfish, birds, and humans. The toxin is more prevalent in cool temperatures and high salinity waters, suggesting it may be a resident population.
A new biodiversity study shows that even seemingly healthy ecosystems with increasing species numbers may already be on the path to decline and loss of species. The study's findings suggest that species richness is not a reliable metric for monitoring ecosystems, as it can mask negative trends in species extinction.
Researchers warn that climate change will lead to the loss of habitats for invertebrates in the European Alps, with many species forced to seek refuge in colder areas. The study predicts that by the end of the century, most species will have experienced consistent losses of habitat.
Researchers combine theory and observation to understand damselfly responses to warming temperatures, discovering a more realistic predator-prey simulation model. This work provides groundwork for understanding how other species will adapt to a warmer world, particularly species like mosquitoes.
Researchers developed a SMART approach to engage with communities in developing real-time early warning systems for floods, combining meteorological data with social factors. This approach aims to improve protection for vulnerable people and properties, particularly in mountainous regions.
Cambridge researchers observe Unio crassus mussels squirting water jets up to a meter away from the riverbed to increase the chances of their larvae attaching to specific host fishes. This behavior has never been seen in any other mussel species and may be crucial for the endangered species' survival.
The IUCN Species Survival Commission has recognized two iconic Chicago institutions as Centers for Species Survival, elevating the region's role in biodiversity conservation. Shedd Aquarium and The Morton Arboretum will collaborate on projects highlighting aquatic and terrestrial linkages in Central American biodiversity hotspots.
A new study suggests that the invasive rusty crayfish may be dying off naturally, allowing native water plants and snails to flourish. In some Northern Wisconsin lakes, crayfish populations have declined by nearly zero, leading to a resurgence of plant life and potential ecosystem recovery.
The cichlid fish species Lamprologous callipterus has a unique reproductive system where males are 12 times bigger than females, but also has a smaller male morph that is 60 times smaller. A new study found that the genetic mechanism underlying this size-determining sex chromosome is linked to the growth hormone regulator gene GHRHR.
Researchers uncovered evidence of blue-green algae presence in a German lake dating back 11,000 years, with species diversity increasing significantly after Bronze Age burials. Climate change and industrial agriculture have since accelerated the growth of these toxic algae.
Research warns that ice roads will become unsustainable as the climate warms, threatening remote communities and industry. The thickness of ice needed to support transport trucks varies by region, with some areas experiencing a 90% decline in safe days of ice.
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.
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.
Researchers measured phycotoxin concentrations in bull sharks caught in the Indian River Lagoon, finding multiple toxins widespread or persistent in the environment. The study highlights dietary exposure as a key mechanism of toxin transfer to bull sharks.
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.
Researchers sequenced giant viruses in the unique freshwater lake, finding a diverse community with distinct genetic repertoires. The study highlights the importance of viruses in biomass turnover and ecosystem balance, particularly in high Arctic environments.
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 new study provides a data-driven definition of a pond, distinguishing it from lakes and wetlands, based on surface area, depth, and emergent vegetation. The researchers found that ponds have distinct ecological structures and functions, requiring unique monitoring standards.
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 bi-national regulation targeting ships entering the Great Lakes since mid-2000s has reduced invasive species risk by 85%, with a significant impact on fisheries and biodiversity. The study suggests that saltwater flushing through ballast tanks is a crucial control strategy.
Researchers in Acadia National Park found that regulations reducing atmospheric sulfur have led to a partial recovery of algae ecosystems, despite ongoing climate change impacts. Clear-water lakes like Jordan Pond are more sensitive to warming than brown-water lakes like Seal Cove Pond, leading to slower recovery rates.
Scientists monitoring hundreds of US streams with sensor technology are gaining insights into how freshwater vital signs shift in response to land development and climate change. The data, made publicly available, will help track changes over time and provide a better understanding of the 'pulse' of streams.
The increasing salinity in freshwater habitats poses a significant threat to biodiversity and ecosystem services. The study proposes a research agenda to address the knowledge gaps and tackle the urgent needs from a global, regional, local, and temporal perspective.
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 found that sulphur mollies create surface waves to deter predators, with the wave number decreasing capture probability. The collective behavior has anti-predator benefits, providing protection from bird attacks.
Scientists have found age rings in Marimo, indicating their growth rate and annual growth of up to 9mm. The study also shows how the algae balls recycle nutrients through a small-scale nutrient cycle, with exchanges occurring every 105 hours.
The excessive use of road salts in winter is contaminating drinking water sources and mobilizing harmful chemicals, according to a new UToledo study. The research suggests that reducing salt application can help mitigate negative environmental impacts, while also protecting human health.