Articles tagged with Mutualism
Researchers found that the plant aborts almost all fruits containing larvae, but instead allows larvae to emerge and burrow into soil, promoting a stable balance in the relationship. This 'fallen-fruit compromise' is a novel mechanism that stabilizes nursery pollination mutualism between Sambucus and kateretid beetles.
Climate change alters high-elevation meadows, causing plant communities to shift towards shrub-dominated landscapes. The changes also affect the soil ecosystem, with declines in mycorrhizal fungi and increases in decomposers.
A new study reveals that the genus Escovopsis emerged 56.9 million years ago but didn't start associating with leafcutter ants until 38 million years ago, suggesting a complex evolutionary history. The fungus's adaptations to its ant hosts likely contributed to its success as a symbiont.
A study found that ants can scare away pollinators like bees when defending plants with extrafloral nectaries, which are secretions that attract ants but not pollinators. However, plants with these glands on other locations had increased reproductive success.
Researchers found that flower constancy is an optimal strategy balancing cognitive and travel costs, not just a memory constraint. Bees decrease constancy when flowers have similar colors or are clustered, but maintain high constancy in mixed environments.
A research group successfully synthesized lignan glycoside in yeast Saccharomyces cerevisiae using a synthetic yeast consortium. The approach reduced side reactions and improved metabolic flux toward the target product.
A study found that caterpillars of two species interact solely with one ant species each, secreting a sugary liquid for recognition and protection. However, switching the pairings led to aggressive attacks from ants, highlighting the specificity of these interactions.
Researchers at Kobe University have discovered that ants and camel crickets are crucial in the pollination and seed dispersal of rare parasitic plants. These tiny arthropods play a unique dual role, visiting flowers for pollen and nectar while later feeding on leaves carrying seeds.
Climate change could be disrupting symbiotic relationships between insects and plants, with urban areas showing less herbivory despite lacking protective ants. The study found that urban plants were not decimated without their normal protector ants, suggesting alternative defense mechanisms.
A study published in Science reveals that ancient asteroid impact may have led to the evolution of fungus-farming ants, which were able to cultivate fungi due to a shortage of food sources. The findings support the hypothesis that this relationship defines the emergence of agriculture.
A study found that nitrogen-fixing bacteria in soil enhance flowers' attractiveness to bumblebees. Plants with these bacteria grew significantly taller and larger than those without, and their flowers became more vibrant and attractive to pollinators.
A modeling study suggests that one-sided interspecies cooperation can emerge and persist over time, with only one species benefiting. The authors use evolutionary game theory and the prisoner's dilemma to model this phenomenon, finding that natural selection may favor asymmetric states where one species exploits another.
A Kobe University research team found that insects, specifically camel crickets, act as primary consumers of fruit and dispersers of dust-like seeds. The study confirmed the importance of insects in seed dispersal for light-harvesting plants.
Researchers discovered that ferns and flowering plants independently evolved nectaries around the same time to defend against herbivores. Ferns likely recruited ant defenders secondarily, tapping into pre-existing relationships as they transitioned from forest floor to canopy.
Researchers at OIST found that anemonefish can identify specific lineages of giant sea anemones, revealing two cryptic species within the bubble-tip sea anemone. The study provides new insights into marine biodiversity and highlights the remarkable abilities of these fish in distinguishing between different sea anemone groups.
Researchers found that fungus gnats lay eggs in the flowers, which then feed on decaying flowers to develop into adult gnats. However, some gnats may escape the trap, suggesting a nuanced interaction between plant and insect.
Researchers have discovered a novel nursery pollination system in which fungi-eating orchids and fruit flies engage in mutualistic symbiosis. The study found that the orchids offer their flowers to the flies in exchange for pollination, providing a breeding ground for the flies' larvae.
Researchers at Penn State discovered that bioluminescent bacteria use a small RNA molecule called Qrr1 to coordinate their behavior and colonize the squid's light organ. This mechanism is likely widespread among bacteria, enabling them to exploit quorum sensing pathways.
A recent study has shown that the mutual symbiosis between bacteria and fungi can be fragile, as a specific protein maintains the balance. When this protein is absent, the bacteria are trapped within fungal hyphae and die.
Researchers found that severe beech leaf disease infestation hurts trees' relationships with helpful root mutualists, ectomycorrhizal fungi. Trees with the most severe symptoms had over 65% less healthy fungi in their roots compared to those with mild symptoms.
Research from Binghamton University highlights the importance of ants in forest regeneration, with over 95% of New York state forests relying on them to disperse seeds. Ants take seeds with fatty rewards back to their nests, protecting them from consumption by rodents and other organisms, promoting a mutually beneficial arrangement.
Biologists from the University of Pennsylvania explored how symbiotic relationships between species evolve to become specific or general, cooperative or antagonistic. They found that cooperative partnering strategies could persist in populations with one specialized host and a corresponding specialized symbiont.
A new mathematical model has found a clear trend towards mutualism in ecological interactions, with most relationships eventually leading to a mutually beneficial partnership. The researchers used adaptive dynamics and classical models of population dynamics to study the transitions between different ecological relationships.
A new study by Rice University biologist Tom Miller explores the role of fungi in determining the range limits of plants in Texas. The research reveals that fungal partnerships improve drought tolerance and could potentially extend the range of grasses in response to climate change.
The white egret orchid's unique petal shape supports the hawkmoth pollinator, leading to higher healthy seed production. The research found that intact plants produced more seeds than those with the fringed petal removed.
Clown anemonefish control their growth to match larger anemones, growing faster than fish on smaller anemones. This mutualistic interaction allows for optimized reproductive value in their environment.
In a new study, researchers found that punishments, like dropping non-pollinated flowers, enforce cooperation between fig trees and wasps. Contrary to previous findings, some fig species do not eliminate non-pollinating wasps by aborting their own fruit.
Researchers found that communities with multiple mutualist species are better equipped to withstand the negative effects of cheaters, as there are backup species to perform the same task. This is because having multiple species with similar roles provides a backup in case one species goes extinct.
A study suggests that whitebark pine's reliance on Clark's Nutcracker for seed dispersal and germination makes the partnership vulnerable to population declines. The researchers found a dramatic decline in Clark's Nutcracker within Mount Rainier National Park, where healthy whitebark pine populations have also declined.
Researchers discovered a previously unrecorded seed dispersal mutualism between the dry-fruited Balanophora yakushimensis and its avian visitors. The birds obtain nutrients from larger fleshy bracts, while the plants benefit from seed dispersal.
New research challenges traditional models of community ecology, suggesting that mutualism is compatible with stable communities. The balance of mutualism with other types of interactions plays a determinative role in community dynamics and stability.
Two NUS studies examine the relationship between a crab spider and its pitcher plant host, revealing that when resources are scarce, this partnership is beneficial. The research suggests that under stressful conditions, mutualism increases in frequency and intensity, supporting the idea that a 'friend in need' can be beneficial for all...
New research from Binghamton University reveals that interactions between relatively small organisms are crucial to mutualistic relationships in an ecosystem dominated by larger organisms. The study found that a third partner, scale insects, strengthens an ant-plant mutualism, providing vital nutrients and defense against predators.
Researchers at the University of Toronto discovered two genes in ants that regulate foraging behavior and impact protection provided to plants. Activating these genes increases ant aggression against herbivores, reducing damage to trees.
Research at Smithsonian Tropical Research Institute found that fig wasps that cheat by not collecting pollen can still flourish in populations where they have a time and energy advantage. This suggests that cheaters may become more common when punishment is too severe, allowing them to reproduce and pass on their non-cooperative behavior.
In laboratory experiments, scientists found that normally mutualistic strains of yeast became competitive and even drove one strain to extinction when environmental conditions were benign and nutrients were plentiful. The researchers developed a model to predict the type of mutualistic relationship that would develop between species ba...
A new study finds that climate-related changes in flower diversity are causing a significant shortening of alpine bumble bees' tongues, making them poorly suited to feed from deep flowers they were adapted to. This loss of mutualism highlights how climate change can decouple well-established relationships between bees and plants.
Researchers develop framework to measure cheating in mutually beneficial relationships, finding evidence scarce. The study aims to stimulate mechanistic studies and improve understanding of human interactions by recognizing that not all bad partners are necessarily cheaters.
Ecuador laurel trees support more scale insects, which produce honeydew for Azteca ants, boosting their numbers and defending the foliage. The tree-ant mutualism is stronger under resource-poor conditions, with trees paying carbon to ants in exchange for guard duty.
In dry conditions, Ecuador laurel trees invest more in honeydew production for ants, which strengthens their defensive mutualism. The study suggests that trees may 'buy insurance' for their leaves with carbon-rich sap, paid to ants in exchange for protection.
A new mathematical model simulates the effect of climate change on plant-pollinator relationships. In some cases, evolution can rescue mutually dependent species from extinction, but density and distribution of other species play a crucial role in their survival.
A study found that Texas leaf-cutter ants use a fungus as an external digestive system to survive the cold, and the fungus's resistance is based on genetic differences. The ants' ability to manage fungal crops prevents them from spreading farther north than their current range.
Mutualist systems may play crucial roles in global ecosystem health, but human impacts are forcing them down unprecedented evolutionary paths. Research suggests that small changes or shifts in mutualistic relationships could be the most potent global disruptions.
A new study found that fig trees have evolved a mechanism to maintain their mutually beneficial relationship with fig wasps. When a wasp fails to pollinate the fig, the tree drops the fruit and kills the baby wasps inside.
Researchers found that young queens adopt a fungus from another nest, cultivating it in their new nest. This temporary partner switching acts as an evolutionary safety net, preventing the accumulation of deleterious mutations and maintaining stability in the ant-fungus mutualism.
The analysis of a 100-million-year-old termite in amber has revealed the oldest example of mutualism between an animal and microorganism, showing that termites depend on protozoa to digest wood. The study also found new fossil flagellate species, a new species of termite, and other discoveries.
A study by Johnstone and Bshary found that the threat of leaving by clients can prevent cleaners from exploiting them. In asymmetric interactions, this 'partner control' model matches existing data on cleaner and client behavior.