Articles tagged with Population Ecology
Comprehensive exploration of living organisms, biological systems, and life processes across all scales from molecules to ecosystems. Encompasses cutting-edge research in biology, genetics, molecular biology, ecology, biochemistry, microbiology, botany, zoology, evolutionary biology, genomics, and biotechnology. Investigates cellular mechanisms, organism development, genetic inheritance, biodiversity conservation, metabolic processes, protein synthesis, DNA sequencing, CRISPR gene editing, stem cell research, and the fundamental principles governing all forms of life on Earth.
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Comprehensive investigation of human society, behavior, relationships, and social structures through systematic research and analysis. Encompasses psychology, sociology, anthropology, economics, political science, linguistics, education, demography, communications, and social research methodologies. Examines human cognition, social interactions, cultural phenomena, economic systems, political institutions, language and communication, educational processes, population dynamics, and the complex social, cultural, economic, and political forces shaping human societies, communities, and civilizations throughout history and across the contemporary world.
Fundamental study of the non-living natural world, matter, energy, and physical phenomena governing the universe. Encompasses physics, chemistry, earth sciences, atmospheric sciences, oceanography, materials science, and the investigation of physical laws, chemical reactions, geological processes, climate systems, and planetary dynamics. Explores everything from subatomic particles and quantum mechanics to planetary systems and cosmic phenomena, including energy transformations, molecular interactions, elemental properties, weather patterns, tectonic activity, and the fundamental forces and principles underlying the physical nature of reality.
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Study of the practice, culture, infrastructure, and social dimensions of science itself. Addresses how science is conducted, organized, communicated, and integrated into society. Encompasses research funding mechanisms, scientific publishing systems, peer review processes, academic ethics, science policy, research institutions, scientific collaboration networks, science education, career development, research programs, scientific methods, science communication, and the sociology of scientific discovery. Examines the human, institutional, and cultural aspects of scientific enterprise, knowledge production, and the translation of research into societal benefit.
Comprehensive study of the universe beyond Earth, encompassing celestial objects, cosmic phenomena, and space exploration. Includes astronomy, astrophysics, planetary science, cosmology, space physics, astrobiology, and space technology. Investigates stars, galaxies, planets, moons, asteroids, comets, black holes, nebulae, exoplanets, dark matter, dark energy, cosmic microwave background, stellar evolution, planetary formation, space weather, solar system dynamics, the search for extraterrestrial life, and humanity's efforts to explore, understand, and unlock the mysteries of the cosmos through observation, theory, and space missions.
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Study of abstract structures, patterns, quantities, relationships, and logical reasoning through pure and applied mathematical disciplines. Encompasses algebra, calculus, geometry, topology, number theory, analysis, discrete mathematics, mathematical logic, set theory, probability, statistics, and computational mathematics. Investigates mathematical structures, theorems, proofs, algorithms, functions, equations, and the rigorous logical frameworks underlying quantitative reasoning. Provides the foundational language and tools for all scientific fields, enabling precise description of natural phenomena, modeling of complex systems, and the development of technologies across physics, engineering, computer science, economics, and all quantitative sciences.
A study by Florida Atlantic University researchers found that severe hurricanes can increase the recovery of coral reef sponges by boosting the influx of juveniles and promoting gene flow. Genetic analyses revealed that populations of clonal marine species may benefit from increased frequency and magnitude of hurricanes to maintain gen...
Researchers at the University of British Columbia have discovered a new population of killer whales in the Northeastern Pacific, with distinct physical characteristics and a diet that includes marine mammals and sea turtles. The orcas were identified through shark-bitten scars and observations by fishermen and birding enthusiasts.
Research reveals that rapid-range shift in fish populations is often a sign of impending decline. The study analyzed data from over 2,500 species and found that those shifting at high velocities show marked declines, while core range populations remain relatively stable.
A group of marine biologists challenge the notion of a stable white shark population shifting eastwards along South Africa's coastline. They argue that data cannot support population stability or redistribution claims, citing issues with dataset presentation and the onset of declines predating orca appearances.
Researchers in New Hampshire are investigating the decline of the state's fisher population with a new $1.2 million grant, tracking populations and analyzing tissue samples for toxins and diseases.
Researchers at Oregon State University discovered that marine heat waves trigger earlier reproduction and high mortality in early life stages of Pacific cod. The study found these changes persisted in subsequent years, potentially impacting the future of Gulf of Alaska's Pacific cod population.
Researchers at Okayama University uncovered key reproductive characteristics of the red-swamp crayfish, highlighting the importance of hook length and chelae for identifying sexual status. The study also found high reproductive ability and fast growth rates compared to native Japanese crayfish.
New research found significant differences in heat tolerance among mosquito populations, with some more resilient to heat waves than others. Climate factors such as precipitation and humidity play a crucial role in determining their thermal limits, which may impact disease transmission.
The 15th annual horizon scan highlights 15 key conservation issues, including declining invertebrate populations and altering marine ecosystems. The study emphasizes the need for continued innovation in sustainable energy technologies to address climate change.
A new study compiled over 600,000 records from US and Canadian wildlife rehabilitation centers to investigate the threats facing more than a thousand species by region, highlighting human activities such as climate change and extreme weather events
Researchers have discovered a rare ant species in North Carolina's tree canopies, documenting an entire colony for the first time. The species, Aphaenogaster mariae, has a distinctive arboreal lifestyle, with queens being smaller than other ant queens and males previously unknown to science.
A team of researchers used trail cameras and GPS collars to track the effects of Cyclone Idai on Gorongosa National Park's mammal community. They found that body size was a key predictor of survival, with smaller animals more vulnerable to the storm's impact.
Plant populations in Cologne show great variation in life cycle characteristics, such as flowering and germination regulation, allowing them to adapt to local conditions. Environmental filtering plays a key role in selecting suitable genetic variants for survival.
Scientists have observed wolves directly hunting and consuming sea otters and harbor seals in Alaska's Katmai National Park. This new evidence challenges previous assumptions about wolf behavior and diet. The study highlights the unique role of wolves in nearshore ecosystems in Alaska.
An international research team discovered sharks have the lowest mutation rate between generations, enabling slow adaptation but also making them vulnerable to ecological changes and extinction threats
Eastern North Pacific gray whales experience extreme population swings due to changing Arctic Ocean conditions. Long-term monitoring data reveals a bumpy ride in response to variable ocean conditions.
Research reveals that female fruit flies pre-select for males with superior genes before influencing sperm storage to ensure compatible fertilization. The study provides new insights into the mechanisms and consequences of mate choice, shedding light on genetic variation and species evolution.
A new approach allows researchers to create maps of coral biochemistry, detailing the distribution of compounds integral to reef health. This innovation provides unprecedented insight into coral resilience and potential stressors like warmer ocean temperatures and acidification.
Researchers found that great-tailed grackles are expanding their range into urban and arid environments due to increased behavioral flexibility. This allows them to adapt to changing conditions and find new food sources. In contrast, boat-tailed grackles only expanded slightly northwards in response to climate change.
By 2070, 44.61% of koala habitats in Australia will be highly susceptible to bushfires, up from 39.56% today. Koalas may struggle to survive due to habitat fragmentation and food source vulnerability.
Biodiversity researchers can now incorporate nanopublications into their manuscripts to future-proof their assertions on biological taxa and organisms. The newly released nanopublication workflow enables authors to create machine-actionable, FAIR data that can be easily traced back to its origin.
Researchers found that plant-to-plant interactions can modulate disease susceptibility in both wheat and rice, with 23 same-species mixtures showing a significant effect. This phenomenon, known as Neighbor-Modulated Susceptibility, may be used to design varietal mixtures with embedded crop protection.
A new study from the University of Washington and Polar Bears International reveals a direct link between cumulative greenhouse gas emissions and polar bear demographic changes. The study shows that reducing greenhouse gas emissions can help protect polar bears, with implications beyond just this species.
A novel method to monitor range shifts of protected organisms and expanding noxious species has been developed. By marking the average position of the 'connectivity limit' over time, researchers offer a statistically reliable approach to tracking changes in species distributions.
A new species of the Persian Gold Tarantula has been discovered in northwestern Iran, belonging to the genus Chaetopelma. The newly described species, Chaetopelma persianum, is an obligate burrower and inhabits high elevations in well-vegetated mountainous regions of the northern Zagros Mountains.
A University of Maryland study found that tree species diversity increases spider populations, providing a natural pest regulation service. Spider populations in diverse plots increased by 23-50% compared to single-species plots during late summer months.
The study mapped global wildland-urban interfaces, revealing previously undocumented regions in eastern Asia, East Africa, and South America. The findings suggest that these areas are crucial for managing environmental conflicts like wildfires and disease spread, and can inform better management practices.
Research suggests that slow population declines may go undetected, leading to underestimation of species risk. The study also indicates that these early declines can precipitate exponential increases in extinction rates in declining or fragmented ecosystems.
A team of researchers developed a new technique using drone photographs to estimate the age-structure of free-ranging dolphin groups, aiding in timely conservation efforts. By analyzing the distance between a dolphin's blowhole and dorsal fin, they can infer its total body length and age.
A new biodiversity study shows that even seemingly healthy ecosystems with increasing species numbers may already be on the path to decline and loss of species. The study's findings suggest that species richness is not a reliable metric for monitoring ecosystems, as it can mask negative trends in species extinction.
Climate change affects giraffe populations differently than expected, with higher temperatures positively affecting adult survival but rainier wet seasons negatively impacting both adults and calves. Heavy rains increase parasites and reduce nutritional value of vegetation, further threatening giraffe survival.
Researchers uncover multiple factors contributing to kestrel declines, including the impact of Cooper's Hawks and habitat degradation. The study suggests that population increases may be seen in some areas, but overall decline trends indicate a need for conservation efforts.
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.
A study found that establishing fallow land can increase the populations of farmland birds and improve biodiversity. The benefits depend on landscape complexity, particularly in regions with a moderate density of boundary lines between fields and woody structures.
A worldwide decline in insect populations is attributed to land-use intensification, climate change, and the spread of invasive animal species. The consequences of this trend include a loss of biodiversity, reduced pollination services, and increased risk to food sources for animals.
The reintroduction of cheetahs to Kuno National Park in India faces challenges due to the park's small size and high prey density. Scientists warn that the released animals may move far beyond the park's boundaries, causing conflicts with villagers.
A study at Kyoto University has demonstrated the computational power of ecological networks, providing a new direction for rapidly developing AI technologies. The researchers developed two types of ecological reservoir computing that efficiently process information and can be utilized as a computational resource.
A recent study found that temperature and extreme drought drive movement among herds of Plains bison, posing challenges for managing the iconic species. The team analyzed GPS-backed evidence from 33 Plains bison across two sites in Oklahoma, revealing a strong link between air temperature and bison movement.
Research in NYC neighborhoods suggests gentrification improves mental health outcomes among White populations, yet has adverse effects on Black and Latino communities. The study analyzed data from 2002-2015 to understand the relationship between neighborhood changes and serious psychological distress.
A study published in PNAS found that climate change is destabilizing mouse lemur populations on Madagascar, increasing their risk of extinction despite high reproductive output. The data analysis revealed opposing trends of rising mortality and reproductive rates, which have prevented population collapse but accelerated the life cycle.
The Southern Resident killer whale population is spending far less time in the San Juan Islands as their primary food source, Chinook salmon, declines. This decline is likely an effort to find alternative food sources, and research shows a strong relationship between the whales' presence and salmon returns.
The Cinereous Vulture has been reintroduced to Bulgaria after being extinct for 36 years. The successful re-introduction campaign, led by Green Balkans and other organizations, involved importing 72 birds from Spain and European zoos. The team recommends the aviary method and delayed release for establishing a new core population, and ...
A study by University of Utah researchers found that birds eat fewer invertebrates in coffee plantations than in forests, threatening their survival. The disturbance of ecosystems significantly impacts dietary options, leading to reduced survival and population declines.
A recent study found that the highly contagious chytridiomycosis fungus has become more prevalent and widespread in Africa since 2000, posing a new threat to amphibian populations. The disease, which can cause skin sloughing, lethargy, weight loss, and cardiac arrest, may be linked to climate change-induced stress.
Researchers from Xi'an Jiaotong-Liverpool University identify vital differences between the plants, including pollinators and lifespan, confirming their classification. The study highlights the importance of recognizing every species for conservation programs.
A new model by Imperial College London and University of Lausanne researchers suggests that 'good genes' can sometimes lead to population collapse when males express traits that damage females. This can result in reduced female fecundity or even death, ultimately leading to a decline in population viability.
Researchers found that bacteria's cooperative behavior helps in the short term but fails to protect them from predators. However, individual defense through filament formation proves successful and stabilizes bacterial population densities.
Researchers found strong seasonality in blue whales' foraging and breeding behavior, with changes in vocalizations based on environmental conditions like marine heatwaves. The study's findings can inform conservation management of this endangered blue whale population.
Bowhead whales are shifting their migration patterns due to declining sea ice in the Arctic, affecting their long-term health and impact on Indigenous communities. The lack of ice is causing changes in bowhead availability for hunters, leading to competition for resources and increased human interaction.
Research reveals dramatic shifts in pollinators across the last century, with hoverflies and moths becoming less frequent visitors to flowers, replaced by flies of the genus Thricops. The findings suggest that plants may be able to compensate for these losses, but changes in insect communities could lead to reduced pollination services.
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.
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 study by McGill University researchers found that Northern Tree Shrews' body size increased with warmer climates, contradicting Bergmann's rule. The team analyzed museum specimens and historical climate data, revealing a reversal of the Island rule as well, highlighting the complex interaction between ecological factors.
A Collaborative Research Centre investigates animal navigation using the Earth's magnetic field. The study focuses on vertebrates, including birds and fish, aiming to protect endangered migratory species.
Researchers have discovered a new critical period for sex determination in sea turtle embryos, influenced by temperature fluctuations. The study reveals two peaks in temperature's impact on sex ratio during the thermosensitive period of development.
Eastern red bats, now the most commonly detected bat in Midwestern forests, have a significant impact on tree regeneration due to their appetite for insect-damaging bugs. Forest managers can benefit from considering these bats' landscape preferences, particularly ponds and smaller forest openings.
A distinct population of oceanic manta rays was identified off the coast of Ecuador, with an estimated total population of over 22,000 individuals, making it more than 10 times larger than any other known subpopulation. The population is large and potentially healthy due to favorable conditions in the region.
A new study from the Indian Institute of Science sheds light on blackbucks' genetic diversity and survival strategies. Despite human activities restricting their habitats, male blackbucks disperse more than expected, contributing to geneflow, while females stay within native population ranges.
Scientists have discovered a new species of scops-owl on Príncipe Island, characterized by its unique 'tuu' call. The population is estimated at around 1000-1500 individuals and is considered Critically Endangered due to habitat loss and the construction of a hydro-electric dam.