Articles tagged with Food Webs
A 20-year experiment at Yellowstone National Park found that removing apex predators led to persistent changes in the ecosystem, which may not be reversed even with their reintroduction. The study challenges the common belief that wolf reintroduction restored the ecosystem and highlights the importance of preserving the natural food web.
A study experimentally caused a predator die-off to understand its impact on freshwater ecosystems, finding that rapid predator deaths lead to an increase in zooplankton biomass and phytoplankton proliferation. However, this effect can sometimes introduce decaying biomass that causes harmful algal blooms.
A study published on Nature Food highlights the potential of using by-products in animal diets to save land and water resources. The research suggests that substituting energy-intensive crops with agricultural by-products could reduce competition for natural resources and improve food security.
A study of 2,329 Mexican-inspired fast food restaurants in six US locations found that consumers purchase fewer calories at restaurants with calorie labels. Consumers are sensitive to calorie information on menu boards, leading to reduced calorie purchases.
A new study found that women-led self-help groups in Odisha, India played a crucial role in maintaining food security during the COVID-19 lockdowns by procuring fresh produce from farmers and selling it to local markets. The groups also provided training and support to their members, enabling them to start their own businesses.
A study by Universitat Autonoma de Barcelona found that all aquatic species in river mouths are contaminated with microplastics. Molluscs were the most affected, and nanoplastics posed a greater risk to aquatic organisms due to their ability to pass through cellular membranes.
A new study reveals that polar bear populations have been declining over the past 20,000 years due to rising sea temperatures, with a 20-40% reduction in population size. The researchers found that even small changes in sea temperature have a significant impact on polar bears.
Researchers estimate that halving Europe's food loss and waste can save 51 million tonnes CO2 equivalents, 6% agricultural land use, and 7% water consumption. Monitoring and reporting of food loss and waste is crucial for policy intervention to prevent food loss and waste.
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.
Researchers found that shoreline spiders can move mercury pollution up the food chain to land animals like birds and bats. The study suggests these spiders can serve as a potential link between aquatic and terrestrial wildlife, informing management decisions.
Researchers argue that considering an animal's entire 'parasitome' is crucial for understanding its place in the food chain. By analyzing stable isotopes, scientists can determine who is eating whom and how parasites affect behavior and metabolism.
Research on minimally processed vegetables reveals unsatisfactory microbiological safety, with Escherichia coli and Salmonella spp. found at high prevalence rates. The study calls for best practice assurance to guarantee products with quality and safety for consumers.
Scientists at Nanyang Technological University have developed a sustainable method to produce lactic acid using discarded jackfruit seeds. The new process is cheaper and more efficient, reducing waste and environmental impact while addressing rising production costs.
Researchers Gabriel Gellner and Kevin McCann develop an inverse approach to modeling food webs, assuming ecosystems exist and working backward to characterize web dynamics. This method, using biological constraints, succeeds in simulating large, diverse ecosystems and understanding their stability.
Researchers identified structural chokepoints in US agri-food supply chains to enhance resilience and security, critical for global food systems. The study's findings may inform policies aimed at bolstering the nation's ability to respond to threats.
A study by the Netherlands Institute of Ecology found that great tits are struggling to adapt their breeding timing to cope with climate change, leading to a decline in population numbers. The researchers used innovative methods to speed up evolution and predict the impact of climate change on natural selection.
A recent study by the Complexity Science Hub reveals interdependencies in the global food supply chain, uncovering profound indirect effects of the Russia-Ukraine conflict on product availability worldwide. The study found that indirect effects often exceeded direct effects, with losses up to 85% in maize and 89% in edible oils.
A new study found that the global food system is responsible for a third of man-made greenhouse gas emissions, with beef and dairy consumption being the largest contributors. The study suggests that adopting a more plant-based diet could help reduce emissions and mitigate climate change.
A new study from Harvard University reveals that despite the national reduction of mercury emissions by 90% since the implementation of the Mercury and Air Toxics Standards in 2011, two regions - Texas and North Dakota - continue to be major sources of toxic air pollution. The research highlights significant sociodemographic disparitie...
Current measures to protect grasslands in the Qinghai-Tibetan Plateau are damaging the ecosystem and should be stopped. Small burrowing mammals, like the plateau pika and zokor, play crucial ecological roles in maintaining ecosystem health and biodiversity.
Research by North Carolina State University found that new species can alter ecosystem processes despite similarities to resident species, but changes occur when they are more dissimilar. This study has implications for predicting the consequences of climate change-induced species introductions.
Researchers found that wolf spider species in Nebraska exhibited similar diets, with many eating the same types of prey. This suggests a complex food web where predators are not just competing for resources, but also engaging in cannibalism to regulate their populations and stabilize the ecosystem.
The concept of nature's chefs offers a new perspective on species interactions, highlighting the diversity of food-making and preparing species across the tree of life. This interdisciplinary approach aims to inform how people think about food across various disciplines.
Research explores the complex relationship between droughts, food security, and conflict in Central America. The study finds that decreases in water availability play a major role in conflict insurgences, while stable conditions of peace are more influenced by favorable socio-economic conditions.
A new study by Penn State researchers found that ground beetle species will thrive or decline based on their habitats and traits. Habitat conservation can help mitigate the effects of climate change on these insects, which are critical pest control agents in North American agriculture.
A recent study has identified a rare strain of Toxoplasma gondii, COUG, in sea otters that caused fatal steatitis and toxoplasmosis. The strain is virulent and can rapidly kill healthy adult otters, posing a health threat to other marine wildlife and humans.
A new approach to describing network connections can help predict system strong and weak points, crucial for understanding disease spread and communication networks. Researchers found that mapping hierarchies and incoherence within a system enables prediction of strong and weak connections.
A study found that the British public largely supports a ban on selling junk foods at checkouts, which is part of the UK government's efforts to tackle obesity. The legislation aims to create healthier shopping environments and reduce calorie consumption among children and adults alike.
A new Penn State-led study reveals that workers in the US food supply chain are at a high risk of serious injury due to unique hazards such as product movement. The researchers found that fractures of the lower extremities were most prevalent, with transportation-related accidents being the most frequent type.
A recent UBC study has found that southern resident killer whales require high-energy prey to survive, with spring-run Chinook salmon being the most suitable. The study's findings have significant implications for managing both species and mitigating the decline of this critically endangered population.
Research suggests that tropical tent web spiders can eat a devastating pest moth of commercially important crops like tomato and potato. The spiders' ability to form groups and create large webs makes them effective biological control agents.
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.
A 250.8 million-year-old fossil find reveals complex marine ecosystems on Earth just one million years after the Permian-Triassic mass extinction, contradicting long-held theories. The discovery provides insights into life's rapid recovery from extreme crises and necessitates a re-evaluation of early Triassic ocean conditions.
A global survey of large carnivore attacks found that attacks in high-income countries occurred mostly during recreation, while those in low-income countries were linked to livelihood activities. The study also highlighted the importance of tailored approaches to prevent such attacks.
Researchers found that larvae of the Atlantic mangrove fiddler crab survived less in warmer water and underwent physiological changes due to higher acidity. Marine heatwaves will be harmful to species and those that feed on them, with potential economic losses to fisheries. Further research is needed to understand the effects.
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.
Climate change and land use will cause extinction cascades leading to the loss of 10% of animals and plants by 2050, rising to 27% by 2100. The study highlights coextinctions as a dominant factor in future vertebrate losses.
Researchers analyzed coyote diets and movement in Cape Breton Highlands National Park to determine why a lone hiker was attacked. The study found that coyotes relied on moose due to resource scarcity, adapting their behavior to exploit this unusually large food source.
A landmark study provides the strongest evidence yet that dinosaurs were in their prime when a deadly asteroid hit, leading to their mass extinction. The research shows that mammals diversified their diets and adapted to environments, creating advantages that helped them survive the disaster.
Researchers analyzed 2.3 million camera-trap photos of tropical mammals, revealing consistent daily activity patterns across continents. Body size and diet are key factors influencing activity, with larger animals active during the day and smaller ones at night.
A new study found that when there are more females than males in colonies of orb-weaving spiders, males fight less with each other and females exhibit less aggression. The researchers also observed cooperation among spiders in constructing their webs and wrapping prey in silk.
Research reveals that microphytobenthos, a key component of the Dutch Wadden Sea food web, obtains its nutrients primarily from detrital nitrogen in pore water. This finding provides new insights into the ecosystem's dynamics and highlights the importance of considering all nutrient pools in models predicting future changes.
A study by Rice University researchers found that tropical mammal communities divide their days similarly, with feeding routines and body sizes influencing activity patterns. The study confirms consistent patterns across Africa, Asia, and the Americas.
A regime shift in the Southeast Greenland marine ecosystem has led to a permanent change from an ice-infested to a more temperate system, with large numbers of fin and humpback whales migrating to the area. This tipping point may be irreversible, having cascading effects throughout the ecosystem.
A new study by Cornell University researchers found that changing the wording on expiration dates could help reduce food waste. The study suggests that certain labels, such as "use by" or "best if used by," may lead to more food being discarded than others.
The Arctic Ocean's pH is decreasing at a rate 3–4 times faster than in other oceans, with acidification impacting marine life. Sea butterflies, a key food source for whales, may face reduced availability due to increased carbon dioxide uptake.
Researchers have discovered that small eddies, swirling at the edges of massive ocean currents, are a key source of nutrients for phytoplankton. These nutrient-rich eddies help maintain healthy populations of phytoplankton, which are essential for carbon sequestration and mitigating climate change effects.
Researchers at the University of Cincinnati found that Burmese pythons have evolved super-stretchy skin between their lower jaws, enabling them to consume prey much larger than expected. This adaptation allows pythons to eat deer and other large animals whole, providing a significant energy advantage in their ecosystem.
A new study reveals that bats' diets are more similar than previously thought, with both species eating a variety of insects and agricultural pests. The research found that the northern long-eared bat tends to pick up larger prey items due to its gleaning strategy.
Researchers found that lettuce takes up nanoplastics from soil and transfers them into the food chain, with particles detected in insects and fish. The study highlights potential health risks to herbivores and humans due to tiny plastic particles in soil.
A recent study by Penn State researchers suggests that the increased interest in local food during the pandemic may be temporary. The study found that concerns about anxiety and a decrease in sense of community among consumers led to lower willingness to pay for locally produced fruits, vegetables, and meat.
A study reveals that over 50% of mammal food web links have disappeared due to animal declines, leading to a collapse of global ecosystems. Restoring extinct species to their historic ranges holds great potential to reverse these declines and restore food web complexity.
A new University of Illinois study shows that fathead minnows can handle simulated heatwaves with few nasty side effects. Most minnows rapidly returned to normal physiological functioning after cooling down, but some became more susceptible to oxidative stress.
Researchers identified critical success factors for mitigating challenges in the food cold chain, including stakeholder pressure and sustainable investment. The study provides a detailed theoretical framework for developing sustainable business strategies in China.
A new study reveals sponges have a unique mechanism to clear their water channels: a sneeze-like process. Sponges release a type of mucus that is consumed by other animals, providing a food source inaccessible to most sea creatures.
A team of researchers at the University of Hawaii collected over 3,000 microbial samples from Waimea Valley's watershed, discovering that microbes follow the food web and are maintained within soil and stream water. The study also found that local distribution of a microbe predicts its global distribution.
New research suggests that plant-based beef alternatives could reduce US carbon footprint by 2.5-13.5%, mostly by decreasing cow numbers. However, this shift could disrupt the agricultural workforce, threatening up to 1.5 million industry jobs and exacerbating issues like fair wages and health equity.
A new study from North Carolina State University found that positive YouTube videos of sharks can increase human tolerance and support for shark conservation. The study showed a significant increase in attitudes, acceptance, and intentions to help sharks after watching positive videos compared to negative ones.
In a breakthrough observation, scientists documented large groups of southern fin whales feeding together in the Antarctic for the first time since the whaling ban. The discovery suggests that fin whale populations are rebounding, with numbers reaching up to 150 individuals.
A University of Washington study found that Pacific salmon in larger groups have lower predation risk, but may trade safety for food. The researchers analyzed historical data on fish catches and predator wounds to estimate group size and predation risk, revealing the benefits and costs of schooling in marine fish.