Articles tagged with Herbivores
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Proeboscideans evolved tooth changes in response to vegetation changes and climate change in East Africa. The earliest true elephants developed highly specialized high-crowned molar teeth around 7 million years ago, adapted to grass-rich diets.
Researchers at North Carolina State University identified a specific blend of pheromone chemicals used by male moths during courtship, including an aphrodisiac called methyl salicylate. Female moths can recognize this chemical through two smell receptors, and its presence in males' hairpencils is linked to mating success.
A team of scientists led by Colleen Smith found that specialist bees focus on the most abundant plant species in an ecosystem. The study suggests that plant abundance could be a mechanism promoting specialization and speciation among bee species.
A new species of dinosaur, Iani smithi, has been discovered in Utah's Cedar Mountain Formation, providing insights into how dinosaurs weathered ecological change during the mid-Cretaceous period. The discovery suggests that several major groups of dinosaurs survived into the early Late Cretaceous despite the changes.
A newly discovered plant-eating dinosaur, 'Iani', holds the key to understanding environmental changes during the mid-Cretaceous period. The fossil's presence in North America suggests that this species may have been one of the last survivors of a once-thriving lineage.
Scientists discovered that smaller brontotheres faced high extinction risk in crowded ecological niches, driving biased diversification towards larger sizes. This complex macroevolutionary pattern shows increased survival of larger species due to reduced competition.
Research at Kyoto University found that spider mites avoid caterpillar traces due to a repellent effect, lasting days. This discovery may lead to the development of a safer and longer-lasting spider mite repellent derived from natural substances.
Scientists have found the first fossil evidence of plants' leaves folding up at night, a behavior known as foliar nyctinasty. This discovery provides insight into the evolution and ecology of plants with this unique characteristic, which may offer ecological benefits to the parent plant.
Researchers found that nectar-feeding bats rely on extra-long whiskers to navigate flowers while feeding, providing enhanced spatial information. Clipping whiskers reduced agility but didn't impact feeding ability.
Research reveals that monarch butterflies storing plant toxins experience reduced warning signal conspicuousness due to oxidative stress. The study found a positive correlation between toxin levels and oxidative damage in the butterflies' bodies.
New research shows climate change played a key role in dinosaurs' rise to success during the Late Triassic and Early Jurassic periods. The planet's warming after the Triassic-Jurassic mass extinction event allowed sauropod-like dinosaurs to thrive and expand across new territories, becoming the dominant species.
Researchers discovered that cabbage white butterfly caterpillars use two complementary enzymes for detoxification, allowing them to adapt to various cruciferous plants. The NSP and MA enzymes differ in their capacity to process different glucosinolates, enabling the caterpillars to fine-tune their detoxification mechanisms.
Research in tropical forests reveals that nitrogen-fixing trees are vulnerable to herbivory by insects, limiting their growth and survival. This constraint could undermine reforestation efforts and the role of these trees in sequestering carbon dioxide from the atmosphere.
Researchers found that nitrogen-fixing trees experience 26% more herbivory than non-fixers, reducing their ability to alleviate nitrogen deficits in tropical soils. This selective feeding by insects and other animals limits the success of fixers and the nitrogen they provide.
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.
Forests with multiple tree species have been shown to be more productive, as different species fill distinct niches and compete less. Additionally, genetic diversity within each tree species also promotes forest productivity by increasing resource use efficiency and reducing damage from herbivores and fungi.
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.
Steaming hay kills harmful microorganisms, but damages proteins making them less digestible for horses. This can lead to impaired muscle development and nutrient deficiencies, affecting growth and coat health. Horses can be enriched with protein-rich feedstuffs to mitigate this risk.
An interdisciplinary team will uncover complex biological systems and develop tools to globally document coral reef health changes. The research aims to understand how herbivory rate at the ecosystem scale emerges and shapes the ecosystem, ultimately informing management of ecosystems.
Researchers at Kyoto University found that two species of spider mites avoid food plant leaves with active ant chemical traces and walking along ant-traveled stems to evade natural predators. This avoidance behavior may be comparable to direct consumption by the ants, highlighting a non-consumptive effect of predators on prey.
A field experiment shows that competition for light drives the decline of plant diversity in grasslands under eutrophication and lack of grazing. Adding light to low-growing plants reduces this loss.
Researchers have discovered that reef halos, visible from satellite imagery, can provide insights into coral reef health globally. These bands of bare seafloor surrounding coral patch reefs are more common and dynamic than expected, with the potential to serve as a window into reef health.
A recent study found that insect herbivores have caused more damage to plant matter from leaves in recent history than millions of years ago. The frequency of leaf damage by insects among forest plants in recent history is more than twice that of vegetation from the Pleistocene and Late Cretaceous periods.
The study found that microbial enzymes are essential for the digestion of pectin in leaf beetles, allowing them to access nutrient-rich plant cells. The researchers also discovered that leaf beetle species acquire these enzymes through horizontal gene transfer from other microbes.
Researchers found that soil microbiota facilitates the growth of invasive garden lupine and provides defense against herbivores. The plants grown with natural soil microbes produced compounds that deter snails, while those with reduced microbiota showed no such effect.
A UBC research team created a computer modelling program to predict coral reef impact and restoration plans. They found that more diverse communities are most resilient, with species having unique traits contributing to habitat quality.
Researchers have discovered exceptionally rich assemblages of plant spine fossils in central Tibet, confirming an early diversification of spiny plants around 39 million years ago. The findings suggest that a drying and cooling climate may have driven the evolution of physical defense mechanisms against large herbivores.
Rapid seed dispersal by hornets is essential for the short-lived seeds of Aquilaria sinensis due to their vulnerability to desiccation. The hornets consume fruit elaiosomes and deposit seeds in damp shade, allowing germination.
An international study uncovered a network of gastrointestinal parasite sharing among 17 wild and domestic herbivore species. The researchers found that host evolutionary history and gut type are key factors in determining parasite diversity and similarity.
Researchers found that tobacco hornworms can convert two plant defense substances, chlorogenic acid and HGL-DTGs, into less effective forms after ingestion. Plants adapt to their environment by selectively producing essential compounds and suppressing others, potentially avoiding mutual detoxification.
A study by the University of Würzburg found that grasshoppers eat a wide range of plants in cold regions, but are more specialized in temperate habitats. The researchers suggest that this adaptation allows them to survive in extreme climatic conditions.
Brazilian researchers have discovered two novel enzyme families in the capybara's gut, which can accelerate the utilization of agroindustrial waste. The enzymes have biotechnological potential and can be used to produce biofuels, biochemicals, and biomaterials.
A study has discovered that humans are disrupting a fundamental pattern in ecosystems, which dates back at least 66 million years. The U-shaped relationship between diet and size in modern land mammals has been found to span across multiple vertebrate groups, including birds, reptiles, and fish.
Researchers discovered that plant volatile signals can warn neighboring plants of herbivore attacks, activating defense genes and increasing resistance. The team found epigenetic mechanisms, including histone acetylation, play a key role in this process.
A new study finds that large wild animals like elephants and whales can help restore ecosystems and battle climate change by dispersing seeds, clearing vegetation, and increasing albedo. Protecting these animals also supports local biodiversity and ecological resilience in temperate, tropical, and subtropical grassland ecosystems.
Researchers at the University of Copenhagen have discovered that plants defend themselves against herbivores by redirecting their defenses to younger leaves, using substances like glucosinolates found in wasabi and mustard. This self-adjustment helps ensure the survival of future generations.
A 15-year study in arctic Greenland found that caribou and muskoxen helped mitigate the effects of climate change on rare plants, lichens, and mushrooms. The presence or absence of these large herbivores made a clear difference in species commonness and rarity.
A study by Brazilian researchers found that these large mammals help regulate plant diversity, productivity, and biomass in understory areas. The spatial structure of plant communities is also influenced, with the Jussara palm playing a key role in attracting animals and dispersing seeds.
A new study found that early human foragers and farmers adopted a high-risk, high-reward strategy to find food, spending more energy but bringing home nutritious meals that could be shared with their group. This allowed them to rest or engage in other activities while food was being acquired.
A group of high school students, with the help of a STRI scientist, discovered that Azteca ants rapidly repair damage to their Cecropia host plants. Within 2.5 hours, the hole's size had been significantly reduced and was often completely repaired within 24 hours.
A groundbreaking analysis of the fossilized remains of Effigia, a 205-million-year-old herbivore, has cast doubt on the prevailing notion that it fed by pecking at plant material. Instead, researchers suggest that its unique beak and jaw structure would have allowed it to nibble at soft, vulnerable tissues like young shoots or ferns.
Aspen recovery in Yellowstone National Park has been found to be less robust than previously believed due to biased sampling methods. Random sampling of all young aspen within a stand revealed a slower rate of recovery compared to the five tallest young aspen, which were used in previous studies.
Researchers discovered that sauropod dinosaurs had simple teeth despite being herbivores, with fast tooth replacement rates allowing them to eat a variety of plants. This unique adaptation allowed them to thrive alongside other plant-eaters without the need for complex teeth.
Researchers uncover fossil remains of Issi saaneq, a long-necked herbivore that lived on Greenland during the Late Triassic Period. The discovery sheds light on the evolutionary pathways and timeline of sauropods, iconic land animals that existed for nearly 150 million years.
A study found that large herbivore biomass is only present in African reserves, with a close correlation between plant productivity and consumer biomass. In contrast, non-African ecosystems have low herbivore densities, even in protected areas.
A study published in Scientific Reports found fossilized remains of sauropodomorphs, including eggs and skeletal remains, that suggest the earliest evidence of herd living in dinosaurs. The fossils, dated to approximately 193 million years old, show age-specific clusters of individuals, indicating possible herding behavior.
A 'raptor-like' dinosaur was actually a timid, long-necked herbivore, according to recent reanalysis of fossil footprints found in an Australian coal mine. The Prosauropod, a plant-eating dinosaur with legs about 1.4 metres tall and a body length of six metres, is the earliest evidence of its kind in Australia, marking a 50-million-yea...
A new study led by the American Museum of Natural History suggests that the extinct ground sloth Mylodon was an omnivore, contrary to previous assumptions. The researchers analyzed amino acid nitrogen values in fossil samples to determine their diet, finding evidence of meat consumption.
Researchers found that predators play a crucial role in regulating small mammal populations, contradicting previous assumptions about the importance of herbivore-plant interactions. The study's unique Arctic vole ecosystem provided a simple model to test predator-prey dynamics, shedding light on population cycles and climate variability.
Researchers found that large herbivores can reduce wildfire damage by mitigating fire-prone vegetation. Effective solutions depend on factors such as herbivore population density and diet. Integrating extensive grazing into land management policies could help mitigate wildfires.
Researchers found that herbivory and wounding on tomato leaves elicit strong electrical signals, which interact with JA signaling to confer resistance. GLR genes play a crucial role in regulating these signals and JA accumulation.
The giant panda's temporomandibular joint and premolar teeth evolved to facilitate sideways movement of the jaw, allowing for efficient peeling of bamboo. This adaptation enabled pandas to access an endless source of nutrition in the early Pleistocene.
A new study challenges the idea that early humans hunted prehistoric elephants, mammoths, and mastodonts to extinction. Instead, it suggests that climate change played a significant role in their decline over millions of years.
Research finds herbivores weaken early emergers in California grass species, offsetting advantage of early germination. This discovery highlights the role of herbivory in shaping natural selection and evolutionary responses to global environmental changes.
Grazing by cattle and small herbivores reduces salt marsh erosion, contributing to nature-based coastal defense. Artificial mowing also increases erosion resistance by excluding burying animals from the soil.
Researchers found that plant-eaters diversified quickly after mass extinctions and evolved specialized features like powerful jaws to digest tough plants. This enabled them to thrive in environments with drying conditions and expanded groups of herbivores took over roles by pushing competitors aside.
Researchers found that blow fly larvae fed on carnivores in Indianapolis but herbivores in Yellowstone National Park, indicating competition for food sources. The study suggests that blow flies can serve as sentinels for animal response to climate change and environmental changes.
Researchers analyzed ankylosaurid skeleton from Mongolia's Baruungoyot Formation, finding evidence of adaptations for digging. The discovery sheds light on the behavior and habits of these ancient creatures.
Researchers found that an enzyme from tomato fruitworm caterpillars causes stomatal closure in plants, inhibiting defensive emissions like airborne plant volatiles. This study may yield insights into plant stress tolerance and potential strategies for improving crop resilience to climate change.
A University of Helsinki study reveals how micro-climate shapes insect communities, herbivory rates, and parasitism in the North. Climate change dramatically reshapes northern ecosystems.