Articles tagged with Evolutionary Ecology
A new study found that banded mongooses engage in lethal intergroup battles, with the number of adult males and age of oldest male being crucial factors. Experienced individuals are vital for success, while older males become liabilities beyond a certain age.
A giant tortoise from the Fernandina Island species, believed extinct for over a century, has been confirmed alive through genetic sequencing. The discovery opens up new questions about its evolutionary relationship to other Galápagos tortoises and provides hope for conservation efforts.
A novel computational method estimates the level of connectivity in bacterial communities, revealing that species diversity is limited by interaction strength. Understanding these stability principles is essential for developing medical treatments and preserving the environment.
Researchers find that cooperative breeding in animal societies increases survival chances of carers, leading to higher reproductive success. The study also reveals the relative importance of kin selection and individual selection varies depending on environmental conditions.
A new study describes a troglobitic clam species from northern Brazil, characterized by lack of pigmentation and reduced size. The discovery highlights the importance of conserving fragile subterranean habitats threatened by recently amended laws in Brazil.
A team of researchers has identified the ancient bird species behind giant prehistoric eggs in Australia, resolving a years-long debate. The study found that the eggs belonged to a unique duck-like line of megafauna known as the 'Demon Ducks of Doom', which was laid by the Genyornis newtoni bird.
Researchers mapped out the natural history of drywood termites, revealing oceanic voyages that accelerated their evolution and confirmed recent dispersals via humans. The study also challenged the common assumption of primitive lifestyles, highlighting the diversity and complexity of termite social behavior.
Researchers at the University of Exeter are using satellites and drones to track the availability of flowers for pollinators. This technology could be combined with behavioral studies to better understand the impact of human activity on pollinator habitats, leading to more effective conservation efforts.
Researchers develop system to measure power distribution between sexes in animals, finding females rule in some species, with reproductive control as common thread. The study proposes a new framework to quantify intersexual power relationships across mammalian societies.
In Chinese penduline tits, egg burial is primarily done to prevent eggs from rolling out of the nest in strong winds, a function that may have evolved in ancient species of the genus. This study found that 45% of eggs in experimental nests showed signs of being blown out, highlighting the importance of egg burial in these birds.
A new framework for understanding animal societies emerges from a review of wealth inequality research in humans and animals. Wealth is found to be distributed equally or unequally across species, with material goods, individual attributes, and social connections being critical sources.
Researchers observed that bacteria change their swimming behavior to avoid getting stuck in confined spaces. In open areas, bacteria meander without discernible pattern, but upon entry into tight spaces, they straighten their paths to escape, suggesting physical features like walls and corners serve as crucial cues.
The Ecological Society of America will hold its 107th Annual Meeting in Montreal from August 14-19, 2022. This year's meeting combines resources and interests of the ESA and Canadian Society for Ecology and Evolution, focusing on theme "A Change Is Gonna Come" exploring global environmental and evolutionary change.
Vervet monkeys have excellent cognitive skills for quickly appraising social context and planning routes accordingly. They make complex, multifactor decisions that consider contextual information, such as individual skill, rank, and competitor distance.
A new study reveals that freshwater habitats have the highest animal species richness per area, with more than 99% of known animal species inhabiting land and 12% ocean habitats. The research suggests that preserving freshwater ecosystems can protect more species and evolutionary history.
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.
A new study found that native species in southwestern Washington floodplains adapt to bullfrogs and sunfish by changing their feeding strategies. The researchers analyzed carbon and nitrogen stable isotopes in predators and prey to understand food webs, finding that some species shifted towards more abundant food sources.
Human activity on Hainan Island is causing changes in the body shapes and diets of tropical birds, resulting in biotic homogenisation. Despite efforts to protect biodiversity, the island's unique ecosystem is being affected by large-scale economic and land-use changes.
A new study by an international team of scientists links early human habitats to past climate shifts using a supercomputer model and fossil records. The research suggests that climate change played a central role in determining where different hominin groups lived and their remains were found.
A Rutgers study found that climate change will alter predator-prey interactions, preventing species from adapting to changing conditions. This will lead to a decline in commercially important fisheries and a shift in the abundance of species in their new geographic ranges.
A new study found that mountain streams are signaling climate change through changes in invertebrate populations, which can indicate ecosystem health. The researchers discovered that diversity tends to increase downstream but is lowest near lakes, highlighting the need for protecting these ecosystems from diversions and habitat damage.
Research by the University of Bath found that weaver birds eating seeds live in colonies and have polygamous breeding, while those eating insects are solitary and monogamous. The study statistically supports an ecological hypothesis on social behavior first proposed 58 years ago.
Researchers found that forced proximity increased social grooming in random pairs of vampire bats, which persisted for over two months. The study suggests a causal relationship between being forced into close proximity and forming preferences for each other, echoing the human experience of college roommates.
A team of researchers found that spotted hyenas in the Serengeti National Park adjust their foraging behavior in response to climate change, with a decrease in migratory herd presence due to increased rainfall. Despite this, lactating hyenas successfully nurse their young, suggesting high plasticity in their foraging behavior.
Jellyfish have evolved separate and independently complex eyes many times over millions of years, making them an ideal model to understand genetic expression. By analyzing multiple species and genes, researchers aim to uncover similarities and differences in evolutionary patterns.
Researchers at the University of Leicester identified striking similarities between grasshopper mandibles and mammal teeth, enabling accurate predictions of their diets. The study used 3D imaging techniques to map the shape of grasshoppers' mouthparts, revealing differences linked to diet, such as steeper slopes for carnivorous species.
A study reveals that new bird species arise in lowland habitats before moving higher into mountainous areas, where genetic differences accumulate. The research suggests that climate fluctuations, particularly during the Pleistocene era, contributed to the evolution of these high-altitude populations.
A comprehensive analysis of 1,800 bird species found that adult sex ratios are the main driving force behind differences in sex roles. Climate, life histories, and social environment were not significant factors. The study provides new insights into the evolution of sex roles in birds.
Researchers identify three types of mechanisms underlying evolvability, including determinants providing variation, shaping the effect of variation on fitness, and shaping the selection process. Evolvability also depends on the timescale, with asexually reproducing organisms evolving faster but reaching lower adaptation levels, while s...
Research found that an earlier start to the growing season enhances tree growth in cold, humid regions but not in dry areas. The study analyzed annual tree-ring width data and found distinct spatial patterns of tree growth in response to an earlier onset of cambial activity.
A recent study reveals that parthenogenesis, a type of asexual reproduction, leads to a loss of efficiency in selecting beneficial mutations, reduced genetic diversity, and decreased heterozygosity in stick insects. This has significant implications for species' ability to adapt to changing environments.
A study by Brazilian researchers found that regular fires enhance functional diversity and carbon fixation in savannas. They measured species numbers, attributes, and carbon dynamics in two areas, one with frequent fires and the other without fires for 16 years.
A recent study discovered that hummingbird-pollinated plant species exhibit significantly higher seed set and germination rates than their bee-pollinated counterparts. This finding suggests that hummingbirds can pollinate plants more effectively due to their larger activity range and frequent movement between different plant individuals.
Scientists are creating a global audio collection of aquatic life to monitor changing marine life and identify new species. The GLUBS platform uses ocean hydrophones, AI, and citizen science to analyze soundscapes and track biodiversity on reefs and other ocean habitats.
Using ancient and historical DNA can assess population genetic patterns and inform conservation actions. The study reveals that a/hDNA can be compared with contemporary data to set baselines for intra-species genetic diversity and estimate changes in effective population size.
Grackles' ability to inhibit previous behavior is linked to their flexibility, according to researchers. The study used various tests, including a touchscreen computer test, to assess inhibition and flexibility in grackles.
A new study reveals that early echinoderm body shape evolution outpaced ecological innovation, contradicting long-standing expectations. The researchers found that morphological diversification occurred at a rate of 71% faster than ecological evolution during the Cambrian and Ordovician periods.
A team of researchers discovered that chance plays a significant role in the formation of individual gut microbiomes, with genetic, diet, and environmental factors influencing the odds of colonization. The study's findings have major implications for treatments like fecal transplants and probiotics.
A new study reveals that butterfly transparency is not only for camouflage but also to signal toxicity. Researchers found that transparent wings can serve both purposes, allowing butterflies to 'cheat' by having the best of both worlds - visibility in sunlight and concealment in shadows.
A recent study highlights the need for inclusive forest conservation policies that learn from past mistakes. The researchers argue that top-down approaches can be harmful and accelerate deforestation, instead recommending local social impact assessments and indigenous involvement in policy-making.
Researchers identified global factors explaining plant diversity in form and function, influenced by climate and soil properties. Characteristics such as size, structure, and life span were shown to be determined by these factors.
A team of researchers proposes that endothermy in mammals and birds has a common ancestry and is much older than previously accepted. They found evidence of endothermy in early ancestors of modern birds and mammals, including Pelycosaurs and Pareiasaurs.
Scientists found that seven genes associated with bright-light vision are absent in burrowing snakes, demonstrating extensive vision gene loss over millions of years. This challenges the hypothesis that all modern snakes evolved from extreme burrowers, suggesting a different evolutionary path for these subterranean snakes.
A study on a beetle species reveals how two distinct cell types form a specialized gland for making and secreting defensive compounds. The findings suggest that the gland's evolution was driven by coevolution between the cell types, leading to the creation of a functional secretion with adaptive value.
Scientists have discovered that four types of monarch predators - a bird, a mouse, a parasitic wasp, and a worm - evolved the same unusual cellular mutations as monarchs. These mutations allow them to resist the toxic effects of milkweed plant toxins, which can be deadly to most animals.
Researchers have developed a 'time machine' framework that uses artificial intelligence to learn from past environmental changes and predict future biodiversity loss. This framework can help decision-makers prioritize conservation approaches and mitigation interventions, leading to more effective management of ecosystem services.
Research found that damselflies infected with Wolbachia bacterium have reduced genetic diversity, making them less adaptable to changing environments. This could lead to a decline in the species' ability to expand its range and survive climate change.
A 26-year study on wild white-footed mice found that mice with physical impairments survived and thrived at a rate similar to their unimpaired counterparts. Mice with impairments had greater mass and larger home ranges, but no evidence of decreased fitness.
Researchers tracked black-tailed deer before, during, and after the Mendocino Complex Fire, finding that all 18 deer survived. Despite burned areas with no vegetation, most deer returned home within hours, potentially due to their loyalty to habitat. However, some deer's body condition declined as they expanded their range.
Researchers found that human brains decreased in size around 3,000 years ago, coinciding with the expansion of collective intelligence and social groups. This decrease was linked to a reduction in brain energy use due to the externalization of knowledge.
A newly discovered ancient crab fossil, Cretapsara athanata, has shed new light on the evolution of crabs. The 100 million-year-old fossil, found in amber, provides evidence that crabs transitioned to land around 100 million years ago, bridging a previously unknown gap in their evolutionary history.
Researchers used satellite data to identify areas in coastal southwest Madagascar where indigenous foragers altered their surroundings, showing a 17% human impact. The study found subtle but widespread changes in soil capacity to absorb water and vegetation distribution.
Researchers warn that climate change and human pressure have eroded benefits of long-distance migration for animals, leading to lower reproductive success and higher mortality. This has serious consequences for ecosystem structure and function, with many species unable to adapt to changing environmental conditions.
A study found that snakes rapidly diversified their diets following the K-Pg mass extinction event, incorporating birds, fish, and small mammals into their diet. This diversification was triggered by ecological opportunities presented by the extinction, with some lineages experiencing further bursts of adaptive evolution.
A new study reveals that city butterflies and moths have genetically adapted to the warmer urban environment, starting their overwintering state later in the year. This allows them to take advantage of a longer growing season, reproducing successfully before winter sets in.
Researchers at Tel Aviv University discovered seahorses can move their head up to catch prey at incredible speeds, facilitated by a powerful flow of water and spring-like mechanism. This study sheds light on the ecology of seahorses, revealing that longer noses enable stronger suction currents for catching smaller prey.
A study by Johannes Gutenberg University Mainz found that genetically diverse ant colonies produce more larvae than those with similar genetic backgrounds. This improved division of labor allows for more efficient task allocation, leading to better colony performance.
Research reveals that nectar-feeding bats foraging in intensively managed banana plantations have less diverse gut microbes compared to those feeding in natural forest habitats or organic plantations. This association between habitat alteration and sustainable agriculture on bat gut microbiota is a significant finding.
A Duke University-led study finds that if endangered primates disappear, up to 250 parasites could go extinct, including those with no other suitable hosts. This potential extinction cascade could have significant consequences for biodiversity and human health.
Researchers at Arizona State University have discovered a worked bone assemblage found near the Atlantic Coast of Morocco dating back to 120,000 years ago, suggesting the manufacture of clothing during this period. The find provides strong evidence for the emergence of complex culture and specialized tool manufacture in early humans.