Zooplankton
Articles tagged with Zooplankton
New approach improves right whale distribution models
Researchers at Bigelow Laboratory have developed a new modeling approach that incorporates detailed prey information to improve the prediction of right whale distribution. This approach accounts for the preferences and needs of hungry whales, highlighting the importance of smaller species in their diet.
Fighting extinction, coral reefs show signs of adapting to warming seas
Research reveals that even thermally tolerant coral species like Stylophora pistillata can experience reduced growth and increased metabolic demand under chronic elevated baseline temperatures. However, some corals can recover when waters cool in the winter, suggesting a potential for resilience.
Charting the evolution of life through the ancient chaetognath
Researchers have finally pinned down the genomic, epigenomic, and cellular landscape of the enigmatic arrow worm, connecting its unique genetic markup to specialized cell-types. The study reveals an unprecedented rate of gene genesis and duplication, as well as a unique method of chromosomal organization.
Tiny creatures, big insights: The microbial signature of the sea uncovered by copepods
A new study has discovered that the microbial signature of tiny planktonic crustaceans, called copepods, reflects ocean currents and environmental gradients more accurately than freely living microbes. This finding suggests that copepod-associated microbes could serve as valuable bioindicators for detecting shifts in marine ecosystems.
Groundbreaking analysis provides day-by-day insight into prehistoric plankton’s capacity for change
Researchers developed a new way to analyze fossils, providing a day-by-day understanding of how prehistoric plankton adapted to their environment. The study revealed that temperature was a key factor in growth rates, with some species thriving in higher temperatures.
Tiny ocean migrants play a massive role in Southern Ocean carbon storage
A groundbreaking study reveals that small zooplankton like copepods and krill enhance carbon sequestration through seasonal migrations. These tiny creatures store around 65 million tonnes of carbon annually in the deep ocean.
Is the ocean getting darker?
The global ocean has experienced a significant reduction in the depth of its photic zones, home to 90% of all marine life, leading to widespread ocean darkening. This change could have profound implications for the planet's marine species and ecosystem services.
Study reveals impact of sewage overflows on Chicago river ecosystem
A new study reveals that untreated wastewater released into the Chicago River during extreme rain events significantly alters the freshwater ecosystem. Zooplankton populations disappeared or increased dramatically, affecting the entire food web and potentially infusing harmful chemicals into the water.
New technology lights way for accelerating coral reef restoration
A novel underwater light system, UZELA, enhances local zooplankton density and increases feeding rates of coral, making them stronger and more resilient against environmental threats. The device can be powered for half a year on a single battery and can optimize a coral's feeding time by operating for one hour after dusk.
Pairing old and new technologies could unlock advances in plankton science
The study highlights the potential of novel techniques to collect and analyse plankton data more efficiently, filling knowledge gaps and generating complete pictures of plankton dynamics. However, integrating old and new methods is crucial to ensure accurate assessments of marine biodiversity.
Tiny poops in the ocean may help solve the carbon problem
A Dartmouth-led study suggests using clay to convert CO2 into food for zooplankton, which expel it as carbon-filled feces in the deep sea. This method accelerates the ocean's natural cycle for removing carbon from the atmosphere.
How do marine food webs respond to increasing alkalinity?
Researchers found that zooplankton communities remained stable and tolerated moderate chemical changes associated with Ocean Alkalinity Enhancement. However, nutritional quality of particulate matter may deteriorate, potentially affecting marine food web structure and productivity.
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.
UTEP study: Zooplankton go “Eew!” to cleaning feces contaminated water
A UTEP study found that zooplankton do not effectively clean feces-contaminated water, contradicting the assumption that they can naturally inactivate pathogen-contaminated waters. The research highlights the limitations of zooplankton as a natural treatment option for polluted bodies of water.
Grazing zooplankton severely impacted by nanoplastic particles
Researchers at Lund University found that grazing zooplankton and phytoplankton diatoms are severely impacted by nanoplastic particles, while cyanobacteria remain unaffected. The study's findings have significant implications for food chains and ecosystem processes.
How does a tiny shrimp find its way home in a vast ocean? Study finds it’s down to their cave’s special smell
A new study reveals that possum shrimp rely on distinctive chemical cues from their underwater caves to find their way back. Researchers found that each cave had a unique water-borne odor bouquet, which helped the shrimp navigate between them.
Measuring microplastic pollution in the marine food chain
Researchers developed a new method to assess and manage rising global plastic pollution by testing levels of microplastic contamination in marine plankton. The study found varying degrees of damage to common plastics using different chemical digestive aids, highlighting the need for effective strategies to mitigate marine pollution.
A belly full of jelly
Research reveals that fish in Greenlandic waters feed on jellyfish, with some species making up the majority of their diet. The study's findings challenge previous assumptions about the role of jellyfish in marine food webs and highlight the need for further research on gelatinous zooplankton's impact.
Plankton researchers urge their colleagues to mix it up
Researchers propose eight research questions to improve mixoplankton classification and study their role in the food web. This knowledge is crucial for predicting ocean ecosystem changes under climate change.
How will climate change affect the distribution of jellyfish and other gelatinous zooplankton in the Arctic Ocean?
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.
How do genetically identical water fleas develop into different sexes?
A team at Osaka University uses novel RNA sequencing techniques to reveal the molecular basis for sexual dimorphism in Daphnia, a species of water flea that can change its form and behavior despite being genetically identical. The study identifies genes that switch which isoforms are expressed in a sex-dependent manner.
Oikopleura who? Species identity crisis in the genome community
Researchers analyzed genome of Oikopleura dioica, finding it has wildly different languages despite identical physical characteristics. The 'scrambling' phenomenon suggests genes are regulated differently, challenging assumptions about species identity.
In Lake Erie, climate change scrambles zooplankton’s seasonal presence
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.
Walleye struggle with changes to timing of spring thaw
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.
Tiny crustaceans discovered preying on live jellyfish during harsh Arctic night
Scientists have discovered that tiny crustaceans, such as amphipods, prey on both living and dead jellyfish during the Arctic polar night. The study, published in Frontiers in Marine Science, found that these crustaceans shift to an omnivorous diet during this period, utilizing jellyfish as a key food source.
Small but mighty – study highlights the abundance and importance of the ocean’s tiniest inhabitants
A new study reveals tiny plankton (0.02mm) make up majority of ocean plankton, playing critical role in ecosystem health and oxygen production. The research emphasizes the need to take these tiny organisms seriously and incorporate them into global ocean policy.
Galápagos penguin is exposed to and may accumulate microplastics at high rate within its food web, modelling suggests
A study in PLOS ONE suggests that Galápagos penguins may accumulate microplastics at a high rate within their food web, with the excretion rate playing a key role. The research uses modeling to simulate microplastic movement through the Galápagos penguin ecosystem and highlights the potential for biomagnification across trophic levels.
Adapting to hypoxia: Zooplankton influence the efficiency of the biological carbon pump in the Humboldt Current off Peru
A new study reveals that zooplankton species in the Humboldt Current off Peru can attenuate the export of carbon to the deep sea by consuming sinking particles. This challenge the previously prevailing assumption of a uniformly efficient biological carbon pump in oxygen minimum zones.
Zooplankton in ocean and freshwater are rapidly escalating the global environmental threat of plastics
Rotifers, microscopic zooplankton found in ocean and freshwater, break down microplastics into nanoplastics. This process creates massive amounts of nanoparticles, posing unknown risks to the environment and human health.
Experiment shows biological interactions of microplastics in watery environment
Research at Purdue University shows that microplastics affect zooplankton's ability to feed on algae, leading to increased algal densities and potential toxin release. This study highlights the ecological impacts of plastics on aquatic food webs and emphasizes the need for further research.
Warming waters of the Arctic could pose a threat to Pacific right whales
Rising Arctic temperatures are causing a mass migration of zooplankton, which Pacific right whales rely on for food. This shift is also drawing industrial fishing fleets northward, increasing the risk of ship collisions and gear entanglements.
Freshwater connectivity can transport environmental DNA through the landscape
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.
Due to sea-ice retreat, zooplankton could remain in the deep longer
A new study reveals that the decline of Arctic sea ice is altering zooplankton behavior, leading to more frequent food shortages and potential negative effects on larger species. The changing light conditions are affecting the daily vertical migration of zooplankton in the Arctic.
Scientists solve ‘enigma’ of pygmy right whales’ feeding habits
Pygmy right whales do not migrate across oceans like other baleen whales, instead staying in mid-latitude waters off southern Australia where they breed and feed on specific prey. This unique behavior puts them at risk due to climate change, which is warming their temperate ocean habitats.
Researchers find evolutionary adaption in trout of Wyoming's Wind River Mountains
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.
In Florida, endangered coral finds a way to blossom
A new study found that the unique oceanographic conditions in Florida's Dry Tortugas National Park provide the ideal environment for elkhorn coral to flourish, with enhanced growth and survivorship. The research highlights the importance of food availability, particularly zooplankton, for coral survival and restoration efforts.
Poop and prey help researchers estimate that gray whales off Oregon Coast consume millions of microparticles per day
Researchers estimate that gray whales off the Oregon Coast consume millions of microparticles per day, primarily from zooplankton and fish. The study suggests that these high loads of microfibers may be affecting the health and behavior of the whales, with potential consequences for their populations.
Climate change threatens global fisheries
A major study found that climate change could decline the diet quality of fish by up to 10% as zooplankton communities shift towards more carnivorous groups. This could exacerbate declines in fish biomass, with potential implications for human societies relying on fisheries for food and livelihoods.
New finding provides better understanding of oceans' capacity to absorb atmospheric CO2
A new study finds that coccolithophores, a common group of marine phytoplankton, dominate the production of calcium carbonate in the surface ocean. This process controls atmospheric CO2 levels and is crucial for understanding climate change and ocean acidification.
Study reveals salps play outsize role in damping global warming
A new study finds that salp blooms can offset as much CO2 as emitted by millions of cars, with some estimates suggesting up to 28,000 vehicles. Salps' unique features and rapid reproduction lead to large amounts of carbon being exported to the deep sea.
Food quality might be key for juvenile sockeye salmon growth and survival
Researchers found that short-term changes in health of juvenile sockeye salmon are related to the quality of zooplankton, not biomass or composition. This highlights concerns about climate change affecting ocean conditions and salmon populations.
Going against the flow: Scientists reveal garden eels’ unique way of feeding
Researchers at Okinawa Institute of Science and Technology Graduate University found that garden eels retreat into their burrows to feed in strong currents, reducing drag on their body by 57%. Their feeding rate peaks at around 0.2 m/s, wider than free-swimming reef fish.
Government guidelines across North America, Europe fail to protect lakes from salt pollution
A global study reveals that freshwater lake ecosystems are being damaged by salt concentrations below government-protective thresholds. The loss of zooplankton triggers a cascade effect causing an increase in algae, potentially altering nutrient cycling and water quality.
Unexpected fish and squid found in the Central Arctic Ocean
Scientists have discovered Atlantic cod, armhook squid, and lanternfish in the deep waters of the Central Arctic Ocean, rewriting the understanding of this ecosystem. The findings suggest that these species can survive in Arctic temperatures and contribute to the food web.
FAU scientists uncover ‘missing’ plastics deep in the ocean
A study led by Florida Atlantic University reveals a vast amount of microplastics in the entire water column of an offshore plastic accumulation zone, with small microplastics being critical and underexplored. The findings highlight the importance of understanding the impact of these tiny plastics on marine ecosystems.
Novel habitats created by non-native mangrove trees may inform the future management of some invasive species
The study found that non-native mangroves on Moloka'i Island support a diverse range of zooplankton communities, rivaling those found in open coastal areas. This suggests that non-native mangroves may provide suitable habitats for rare and important species, altering the way invasive species are managed.
New method makes it easier to predict algae blooms
A new method improves forecasting of toxic algae blooms by analyzing chemical markers from zooplankton in mussels, allowing for earlier warnings and more accurate predictions.
Cloud shadows cue mini-migrations
A new study reveals zooplankton exhibit high-frequency 'mini-migrations' due to cloud shadows, affecting their energy expenditure and carbon transport. The daily process of swimming up and down in response to subtle changes in light intensity may have significant implications for Earth's carbon cycle.
URI oceanographer finds that passing clouds cause some marine animals to make mini-migrations
Zooplankton swim up and down in response to shifts in light due to cloud cover, with mini-migrations adding up to 30% of the average nightly migration distance. This behavior has implications for metabolic requirements and carbon transfer in the ocean.
Variations in climate conditions affect reproductive success of Antarctic krill, study finds
A new study from Oregon State University found that climate conditions significantly affect the reproductive success of mature female Antarctic krill. The researchers discovered a relationship between the condition of these females during spawning season and the proportion of juvenile krill in the population the following year.
Microplastics affect global nutrient cycle and oxygen levels in the ocean
A new study suggests that microplastic ingestion by zooplankton can significantly affect the marine ecosystem's nutrient cycling and oxygen levels. Even low concentrations of microplastics can lead to a strong impact on ecosystems.
Follow the smell of the ocean to find where marine predators feed
Researchers found that zooplankton grazing on phytoplankton results in higher DMS concentrations, allowing marine predators to track their prey. The study suggests that large marine animals use DMS concentration gradients to find food sources.
You are what you eat is as important for fish as it is for people
A recent UBC study measured the biochemical properties of zooplankton in the Strait of Georgia, finding that seasonal changes in plankton food web pathways drive variability in plankton fatty acid composition. This shift confers a higher nutritional value to zooplankton in the summer, benefiting juvenile salmon and herring.
Arctic light pollution affects fish, zooplankton up to 200 meters deep
A recent study has revealed that Arctic light pollution can significantly impact the behavior of fish and zooplankton, even at depths of up to 200 meters. The researchers used autonomous underwater vehicles to observe the effects of artificial light on these organisms during the polar night.
The paradox of dormancy: Why sleep when you can eat?
Researchers discovered that dormancy is a natural response to over-predation, allowing zooplankton to survive during food scarcity. Laying dormant eggs can aid population recovery, while regular eggs may not.
Siberian blue lakes and their inhabitants
The study of two Siberian blue lakes reveals a similarity in zooplankton species composition to other Western Siberian lakes, with species such as cladocerans and copepods dominating. The concentration of heavy metals exceeds sanitary standards, but is characteristic of the region's aquatic ecosystems.
For some corals, meals can come with a side of microplastics
A new study found that corals are more likely to eat microplastics when fed other food sources, but not when given microplastics alone. The research suggests that some coral species may adapt to life with microplastics, while others may be negatively impacted by chronic exposure.
Fishery in Lake Shinji, Japan, collapsed 1 year after neonicotinoid use
A study by Masumi Yamamuro and colleagues found that neonicotinoid pesticide use led to a 83% decrease in average springtime zooplankton biomass, causing the collapse of two commercial fisheries on Lake Shinji. The impact was felt throughout the aquatic food chain, with smelt harvests plummeting from 240 tons to 22 tons in just one year.
Fifty years later, DDT lingers in lake ecosystems
Researchers found elevated levels of DDT and its breakdown products in lake sediments, affecting zooplankton communities. The long-lived insecticide's persistence has altered aquatic ecosystems, with shifts towards more contaminant-tolerant species.