Freshwater Ecology
Articles tagged with Freshwater Ecology
The shoal remembers: How signs of a collective memory shape a predator-prey arms race
Researchers found that bird predators adjust their attacks to avoid triggering strong collective waves from sulphur mollies, but also exploit weak points in the group's defense. The fish, in turn, seem to 'remember' previous predator attacks, leading to stronger responses when attacked again.
How river DNA can track fish, frogs, fungi and human feces — all at once
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.
UC Santa Cruz receives California Department of Fish and Wildlife funding to assess health of state’s streams
Researchers at UC Santa Cruz are using eDNA to create a comprehensive biodiversity assessment tool, adding a broad biodiversity assessment to statewide management of freshwater ecosystems. The project aims to provide faster monitoring and a clearer picture of stream health across California's diverse watersheds.
Assessment of nature in the US now available for public comment
The US Nature Assessment Report documents human impact on nature, including resource extraction and habitat loss, but also shows restoration and Indigenous stewardship approaches can help turn things around. The report highlights the importance of farmer involvement in protecting ecosystems and preserving biodiversity.
UMaine researcher develops model to protect freshwater fish worldwide from extinction
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.
As tropical fish move north, UT San Antonio researcher tracks climate threats to Texas waterways
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.
Freshwater browning threatens growth and populations of economically important fish, McGill researchers say
McGill researchers found that freshwater browning is stunting some fish species' growth, shrinking others' populations, and altering fish communities. This phenomenon has broad impacts on biodiversity, affecting economically important fish species such as northern pike and walleye.
The vast majority of US rivers lack any protections from human activities, new research finds
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.
Moss and symbionts offer a promising solution for removing metals from mining and forestry-impacted waters
Mosses have been found to remove metals from water by utilizing the help of their microbial symbionts. The key to this process is the cooperation between the moss and its endophytes, which enhance metal tolerance. Mosses from polluted environments were found to host more beneficial microbes that facilitate metal removal.
FAU Engineering awarded $600,000 FDEP grant to combat harmful algal blooms
Florida Atlantic University's College of Engineering has received a $600,379 grant to advance technology targeting harmful algal blooms in Florida's waterways. The project aims to develop novel 3D-printed adsorbent materials for efficient phosphate removal.
Garden ponds as potential sources of plant invasions
A recent study found that almost half of garden ponds surveyed contained at least one invasive plant species. Researchers are calling for environmental education and awareness about the risks of invasive species to prevent their spread. Alternative, native plant species should be promoted to help manage ponds sustainably.
Counting salmon is a breeze with airborne eDNA
Researchers at the University of Washington successfully tracked salmon populations using airborne eDNA, finding that the airborne DNA concentration fluctuated with visual counts reported by the hatchery. The technique links air, water, and fish, providing a valuable tool for population health monitoring and management.
Algae and water fleas in lakes: Light color influences food webs
A recent study found that light color affects phytoplankton growth and nutrient cycling in lake ecosystems. The researchers discovered that the less light available to microalgae, the more important the color of light became for their growth.
Floating wetlands offer cost-effective nature-based water treatment
Researchers analyzed 11 international constructed floating wetlands projects and found that they can be a competitive solution for improving water quality, especially for nitrogen removal. The cost of removing nitrogen was consistently cheaper than phosphorus, making floating wetlands a more economical option over time.
Stakeholders meet to discuss national peatland impact plans for Finland, Germany, Netherlands
Stakeholders from Germany, the Netherlands, and Finland met to develop impact plans influencing policies and markets to restore degraded peatlands. The plans aim to align policy goals with specific tasks, support efficient funding and market innovation.
The salmon superfood you’ve never heard of
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.
Connecticut College study finds fungus metabolites may help ghost shrimp survive
A Connecticut College study found that fungus metabolites may boost the survival of ghost shrimp in freshwater ecosystems. The study showed a 48% lower mortality rate and altered behavior among shrimp exposed to these byproducts.
Genetic isolation despite geographic proximity highlights the threat to island fish species
A recent genetic study found that populations of the amphidromous goby Luciogobius ryukyuensis are genetically distinguishable, suggesting minimal larval exchange between islands. This highlights the urgent need for conservation efforts to protect vulnerable habitats in island ecosystems.
Restored wetlands reap benefits for climate, drought-resilience after just one year: study
A new study found that restored floodplain wetlands can recover within a year and show substantial ecosystem benefits rapidly. The study revealed that managing freshwater wetlands for carbon benefits also boosts flood and drought resilience.
Philippine biologists warn against new alien fish in country's largest lake
Researchers have confirmed the presence of Barbonymus schwanefeldii (tinfoil barb) in Laguna de Bay, Philippines' largest freshwater lake. The invasive species can outcompete native fish for food and breeding grounds, posing long-term ecological consequences.
The first “SpongeBooster of the Year” award celebrates efforts in wetland restoration
The SpongeBoost project recognized Planar e.V. for restoring a 1.1 km section of the Diemel River, reconnecting 20 hectares of floodplain and creating habitats for over 65 endangered species. The 'SpongeBooster of the Year' award aims to promote nature-based solutions and cost-effective restoration methods throughout the European Union.
The first “SpongeBooster of the Year” award celebrates efforts in wetland restoration
The SpongeBoost project recognizes Planar e.V.'s efforts to restore a 1.1 km section of the Diemel River, reconnecting approximately 20 hectares of floodplain and creating habitats for over 65 species. The award highlights nature-based solutions as effective tools for addressing climate and biodiversity crises.
Colombia’s peatlands could be a crucial tool to fight climate change. But first we have to find them
Researchers have mapped Colombia's eastern lowlands to identify areas of peatlands, a crucial carbon storage system that can help reduce the country's emissions. The study found an estimated 7,370-36,200 square kilometers of peatlands, with potential to store more carbon than all the world's trees.
In Croatia’s freshwater lakes, selfish bacteria hoard nutrients
Researchers found that nutrient hoarding by selfish bacteria influences carbon and nutrient availability in freshwater ecosystems. In two Croatian lakes, mesotrophic Crniševo Lake showed higher rates of selfish activity than oligotrophic Kozjak Lake.
Classifying floodplains: an innovative approach to flood mitigation
The study introduces an innovative method to detect and classify floodplains based on their ability to attenuate floods. The Hydraulic Floodplain Classification emphasizes the variable capacity of the landscape to influence flood routing, enabling better water resource assessments and floodplain management applications.
The Women’s National Football Conference supports women’s health
The WNFC's player ambassadors will amplify public service announcements, social media content, and local community education events to raise awareness about cardiovascular disease and CPR education in women. The league has also implemented a requirement for all coaches to be certified in CPR, AED, and first aid.
The devastating human impact on biodiversity
A study by Eawag and the University of Zurich found that human impacts on biodiversity are widespread and severe, with average species declines of 20% across all biogeographic regions. The composition of species communities is also shifting, with environmental pollution and habitat changes having a particularly negative impact.
Pacific island water security requires new approach
Experts at Flinders University are calling for a new approach to water security on Pacific islands, where rising sea levels threaten local water supplies. Infiltration galleries, which extract fresh groundwater from shallow depths, may provide a solution, but more research is needed on their optimal design and performance.
School of Public Health researchers receive National Academies grant to assess environmental conditions in two Houston neighborhoods
Researchers Garett Sansom and Lindsay Sansom will evaluate soil conditions in Settegast and Lakewood neighborhoods for cancer-causing heavy metals and polycyclic aromatic hydrocarbons. The project aims to identify residents' environment-related concerns and develop a better understanding of local priorities and challenges.
Melting glaciers increase loss of freshwater resources and rise global sea levels
Global glacier mass loss has increased by 36% since 2000, with 6,542 billion tons lost between 2000 and 2023. This results in an 18 mm annual contribution to global sea-level rise, making glaciers the second-largest contributor after ocean warming.
Biodiversity in England’s rivers improved as metal pollution reduced
A study found that reductions in zinc and copper pollution led to improvements in freshwater biodiversity in England's rivers. The researchers used statistical modeling to investigate various factors contributing to the decline in metal pollution.
Extreme climate pushed thousands of lakes in West Greenland ‘across a tipping point,’ study finds
A recent study found that extreme climate events in fall 2022 pushed thousands of lakes in West Greenland across a tipping point, leading to changes in water quality, chemical properties, and biodiversity. The lakes, which previously provided drinking water and sequestered carbon, now emit more carbon dioxide.
Garden ponds: Hidden gems of urban biodiversity conservation
A recent Hungarian study found that garden pond features such as age, area, aquatic vegetation, and shoreline vegetation influence the occurrence of animals like amphibians, odonates, and birds. The study highlights the importance of pond management practices to support biodiversity in urban areas.
Some bacteria evolve like clockwork with the seasons
A new study reveals that bacteria species in Lake Mendota rapidly evolve over time, responding to changing seasonal conditions. The researchers found that hundreds of separate species would return almost fully to near copies of their genetic predecessors after a thousand or so generations of evolutionary pressures.
Small habitats, big consequences: Connectivity loss in pond networks threatens microbial biodiversity
A recent study found that connectivity loss within pond networks leads to significant declines in microbial diversity and community evenness. The loss of connectivity disrupts trophic interactions, causing reduced biomass in zooplankton grazers and further exacerbating the decline in diversity.
Visiting Fellows selected for inaugural cohort of the Africa-UBC Oceans and Fisheries Visiting Fellows Program
The Africa-UBC Oceans and Fisheries Visiting Fellows Program has selected two exceptional scholars, Dr. Cynthia A. Adinortey (Ghana) and Dr. Antony Otinga Oteng’o (Kenya), to collaborate with UBC researchers on ocean sustainability projects.
Strategies for safe and equitable access to water: a catalyst for global peace and security
A new seven-point strategy devised by international experts outlines steps for safe, equitable, and sustainable global water management. The plan emphasizes local collaboration, community engagement, and inclusive policies to foster peace and security.
Tennessee RiverLine secures $500,000 Appalachian Regional Commission Grant for river experience planning and design standards
The Tennessee RiverLine initiative has been awarded a $500,000 Area Development grant to support the development of comprehensive Planning and Design Standards. These standards will help accelerate investments in river access amenities, outdoor recreation infrastructure, and community connectivity across the Tennessee River valley.
UT Extension program improves safety along local river
The UT Extension program has improved safety along the Buffalo River by installing GPS mile markers, assisting first responders during emergencies. The project, launched in partnership with local organizations, aims to reduce emergency response time and benefit thousands of river visitors annually.
Salton Sea receding at greater rate according to Loma Linda University study
Researchers at Loma Linda University found the Salton Sea's shoreline is retreating at an increasing rate, creating more polluted dust from agricultural runoff. The study forecasts parts of the North Shore will retreat up to 172 meters by 2041, posing health risks to nearby communities.
Large herbivores have lived in Yellowstone National Park for more than 2,000 years
Researchers analyzed steroids from animal dung in lake sediments to determine the dominant large herbivores that lived in northern Yellowstone National Park. The study found bison and elk as primary species for the last 2,300 years, with impacts on local ecosystems.
Concerning levels of PFAS in fish miles away from large contamination source
A new study by Harvard researchers finds alarmingly high PFAS concentrations in fish tissues even up to 8 km from the military base. The results underscore the urgent need for more comprehensive monitoring of PFAS in aquatic ecosystems, particularly in regions where freshwater fishing is an important food source.
Loss of lake ice has wide-ranging environmental and societal consequences
The world's freshwater lakes are freezing over for shorter periods due to climate change, affecting more than a billion people worldwide. Changes in ice duration have major implications for human safety, water quality, biodiversity, and global nutrient cycles.
Citizen scientists will be needed to meet global water quality goals
A new policy brief argues that citizen scientists are crucial for meeting global water quality targets, providing valuable data and community involvement. Successful case studies show how collaboration with locals can improve water quality monitoring, education, and rapid response.
Lake ice quality degrading as planet warms – skaters, hockey players, ice truckers on thin ice
A new study from York University finds that lake ice quality is deteriorating due to climate change, making it unstable and unsafe for humans. The researchers warn of the dangers of thin layers of black ice and white ice combinations, which can lead to accidents and even fatalities.
Study finds mine-drainage treatment cost effective, but far more costs lay ahead
New research from the University of Pittsburgh shows that treating abandoned mine drainage in Pennsylvania is both successful and cost-effective, particularly benefiting vulnerable communities. However, current appropriations are insufficient for long-term treatment and addressing other hazards, requiring an additional $3.9 billion.
Hudson River Foundation awards $1.7 million to Cary Institute for river monitoring program
The Cary Institute will collect data on invasive mussels, water quality, and other species to support fisheries and inform management decisions. The three-year project will provide vital information for managing the river and its fisheries.
Drought risk and awareness gaps in global society
A growing global understanding of drought's impacts, but significant gaps remain in affected communities and developing countries. Long-lasting droughts heighten awareness, while economic factors influence responsiveness to the issue.
Non-biting midges help us understand how to protect Lake Balaton
Researchers analyzed lake macroinvertebrate fauna, particularly chironomids, to reconstruct the lake's natural state. This helps establish a reference point for conservation purposes, as significant changes occurred during the economic boom and fish stocking.
Severe droughts limit Amazonian communities' access to basic services
A recent study found that nearly 50% of non-Indigenous localities and 54% of Indigenous villages in the Brazilian part of the Amazon basin are prone to isolation during severe droughts. Severe droughts result in extended periods of low water levels, affecting communities' access to goods, services, healthcare, education, and livelihoods.
Unprecedented warming threatens earth’s lakes and their ecosystems
A recent study predicts that lakes worldwide will experience unprecedented surface and subsurface warming, leading to severe disruptions in ecosystems. Tropical lakes are expected to be the first to emerge from natural temperature bounds, while high-latitude lakes may shield their subsurface layers from surface warming.
Bacterial glitter
Researchers sequenced DNA of 87 structurally colored bacteria to identify genes responsible for their glittering structures. The findings could lead to environmentally friendly dyes and materials.
Study reveals environmental impact of artificial sweeteners
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.
Warmer wetter climate predicted to bring societal and ecological impact to the Tibetan Plateau
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.
University of Oklahoma researchers discover genetic collaboration in harmful algae
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.
Saturated soils could impact survival of young trees planted to address climate change
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.
Limited adaptability makes freshwater bacteria vulnerable to 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.
Ancient landscapes point to Australia’s initial human migration paths
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.
From a cryptic genetic element in the human gut to a sensitive biomarker
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.