Articles tagged with Species Diversity
Scientists confirm tropical regions as key to global biodiversity, with a group of shellfish defying conventional patterns. Contrary to expectations, the Anomalodesmata group shows peak diversity in mid-latitudes, contradicting standard patterns.
A new analysis shows that as plant species go extinct, natural habitats become less productive and contain fewer total plants. This situation could ultimately compromise the benefits that humans get from nature. The study found that ecosystems with fewer species produce up to 50 percent less plant biomass than those with more natural d...
A study reveals an astonishing level of cryptic diversity among frog species in the Guiana Shield region, potentially doubling previously thought numbers. The underestimation of amphibian diversity has broad implications for conservation efforts and management of biodiversity.
A recent study found that ponds' community diversity converges after a drought, with only hardy species able to withstand the conditions. This convergence has important implications for wetland restoration and creation, highlighting the need to consider stochasticity and beta diversity in ecological restorations.
A new UC Davis study explores how competition among genetically varied plants relates to species diversity, finding that diversity within a species is necessary for maintaining diversity among species. The research also highlights the importance of preserving biodiversity in plant communities.
A new analysis by Oregon State University and U.S. Geological Survey suggests that dense conifer forests may be harming dozens of animal species dependent on shrubs, herbs, and broad-leaf trees. At least 78 vertebrate species have been documented to require non-coniferous vegetation, which is often scarce in managed forests.
Two closely related species of East African cichlid fishes evolved divergent immune gene adaptations, explaining their reproductive isolation. These differences in MHC genes influenced mating behavior through olfactory communication.
New research findings suggest tropical insects can be consistently found across hundreds of miles, eating a broader menu of foliage. This challenges the notion that plant-eating insects are picky eaters that stay close to home.
A study of lowland rainforests in New Guinea found low beta diversity across the study area, indicating widespread distribution of insect species and limited specialization. The results have implications for biological conservation and may suggest that bigger is better when preserving these forests.
The study analyzed trilobite species, which emerged during the Cambrian explosion, and found high variability within species. Approximately 35% of the species showed evolving characteristics, while only 13% of later trilobites did so.
A UC Irvine scientist has discovered that excess nutrients in an ecosystem can lead to a decrease in plant species diversity while increasing the productivity of a few selected species. This finding provides a new explanation for why polluted ecosystems often contain limited numbers of plant species.
A new study by University of Minnesota researchers found that excess nutrients and water can reduce species diversity in ecosystems, allowing a few species to dominate. The findings support the idea that plant diversity is directly related to limiting factors such as soil moisture and nutrient availability.
New research from MBL reveals that some fish larvae can discriminate odors in ocean currents and use scent to return to their birthplace. This homing behavior could support population isolation and genetic divergence, leading to the formation of new species. The study suggests that smell plays a crucial role in guiding larvae back to t...
The tropics are revealed as the Earth's most fruitful biodiversity spawning ground, with fossil data indicating a consistent pattern of extinction, origination, and immigration. The study suggests that human-caused extinctions in the tropics will have long-term consequences on global biodiversity.
A new study reveals that tropical regions are both a cradle and a museum of biodiversity, with many species originating in the tropics and spreading to higher latitudes. The research suggests that preserving tropical ecosystems is crucial for maintaining global biodiversity.
University of Michigan researchers found that invasive cattails alter the environment in ways that hinder native species but benefit the invaders. The cattails' litter accumulation creates a different environment with higher nutrient levels and lower light, which favors the invaders' growth.
The study found that species with smaller range areas are at higher risk of extinction due to increased vulnerability to habitat changes. Larger range sizes, on the other hand, result in fewer but larger populations, making them less susceptible to population wipeouts.
Research highlights the threat of biological diversity loss to human health, citing Lyme disease and West Nile virus as examples. A rapid autopsy program for a rare lung disease called interstitial pulmonary fibrosis (IPF) also improves medical research outcomes.
On a landmark 20-day Atlantic cruise, scientists cataloged 500 species of tiny zooplankton, including new discoveries. The expedition, part of the Census of Marine Life initiative, aimed to illuminate these essential life forms in the ocean's lower layers.
A study provides empirical support for natural selection's role in species formation by analyzing the relationship between adaptation and reproductive isolation in hundreds of organisms. The researchers found a positive link between these two processes, suggesting that adaptation drives species diversification.
Researchers have discovered new biodiversity hotspots in underground environments, home to unique and diverse species of terrestrial cave fauna. These discoveries shed light on the vast and largely unexplored world of subterranean ecosystems.
A global study of over 1,000 pollination experiments found that high plant diversity can lead to reduced pollination and reproductive success. This reduction in fruit and seed production may push vulnerable species towards extinction.
A new study suggests that declining biodiversity in pollination networks may threaten plant community persistence. The experimentally manipulated plant and pollinator interactions show increased pollination efficiency with complementary insect and flower pairings.
Research suggests that pigment spots on bird eggs strengthen the shell by compensating for reduced thickness caused by calcium deficiency. Females nesting on low-calcium soils lay thinner-shelled, more-spotted eggs than those on high-calcium soils.
Estimates for the number of living species on earth range from 3.5 million to over 30 million, but only 1.9 million have been classified and described. A new study uses the species-area effect to estimate historical biodiversity in the fossil record, finding a strong relationship between species richness and geographic area.
Researchers found that sponges produce bioactive substances in response to competition, which is crucial for developing new drugs. However, the growth rates of cultivated species are slow and unpredictable, resulting in lower substance production compared to natural counterparts.
A nationwide study by UCI researcher found that nitrogen fertilization can have a devastating impact on rare plant species, causing a decline in diversity and even local extinction. The study analyzed 967 plant species across various ecosystems and identified simple plant traits as predictors of species risk.
Researchers tested genetic diversity on Italian agile frog tadpoles exposed to a North American virus, finding that disease susceptibility paralleled population genetic variability. The study highlights the risks of population bottlenecks and inbreeding and suggests a method for predicting responses to new infectious diseases.
A team of Wisconsin scientists discovered molecular switches that govern the development and evolution of form in animals. The study found that genetic changes to these switches can produce diverse patterns and features, such as spots on fruit fly wings or stripes on zebras, which confer advantages for survival and reproductive success.
A five-year grassland study found that both species abundance and loss order significantly impact ecosystem diversity, with diverse communities resisting invasive weeds. Researchers replicated natural patterns and processes to demonstrate the importance of considering realistic species loss scenarios.
Researchers found that an ancient marine invasion led to a significant increase in regional diversity, with gamma diversity rising by 26% due to changes in beta diversity. The study suggests that habitat distribution or increased habitat diversity may have contributed to this increase.
Researchers found that species diversity in local areas is directly proportional to species diversity in the region, highlighting the importance of regional forces in shaping biodiversity. Latitude also plays a significant role in local species richness, with diverse regions supporting more species.
Experts are conducting a comprehensive census of marine life in the Arctic Ocean, which is experiencing rapid changes due to melting ice caps. The project aims to record and inventory biodiversity in the three main layers of the water column and study the effects of climate change on aquatic life.
A recent study by URI graduate student found that off-road vehicles significantly impact beach ecosystems, with a 30-50% decrease in invertebrate populations on beaches where driving is allowed. The research highlights the importance of protecting the wrack line, which serves as a crucial habitat for many species.
Researchers at the Wildlife Conservation Society discovered a large population of jaguars in Bolivia's Kaa-Iya Park, estimated to be one of the largest in any protected area. The park, which covers over 34,000 square kilometers, is also home to a diverse range of other wildlife, including endangered species such as the Chacoan guanaco.
Researchers used quantitative data to analyze the evolution of acritarchs, a group of ancient microfossils. They found that complexity increased over time but leveled off, with post-Ediacaran acritarchs reaching high levels of morphological complexity but not large sizes.
A new study by University of California, Berkeley biologist Rosemary Gillespie found that Hawaiian spiders diversified to fill a wide range of habitats on the Hawaiian Islands. The research suggests that evolution plays a key role in shaping communities on these islands, similar to mainland processes.
In a four-year study, scientists found that gray wolves consumed a diverse range of species, promoting ecosystem diversity and health. In contrast, hunter kills were dominated by less mobile scavengers, indicating that hunters have a smaller impact on the Yellowstone ecosystem.
Research by Schurbon and Fauth found that prescribed burning negatively impacts pine savannah amphibian diversity and abundance, with species declining in areas burned more recently. The study suggests a 5-year prescribed burn cycle and summer burns can balance the needs of amphibians and longleaf pines.
Scientists discover that community assembly history influences productivity-biodiversity relationships in natural ecosystems. Experimental study with microorganisms reveals that the sequence of species arrival affects these relationships, which is a key factor in understanding diversity patterns.
A study by Kenneth Schmidt found that Illinois raccoon populations coincide with declines in low-nesting songbirds, with over 70% of these species dropping from the state's bird list. Raccoon habitat expansion and loss of top carnivores contribute to this decline.
Researchers have discovered that the history of community assembly is a key predictor of future biodiversity and ecosystem productivity. The study used microorganisms to manipulate productivity and found that the sequence of species arrival from a regional pool of colonists had a large effect on the productivity-diversity relationship.
Researchers found that introduced plants from different guilds struggled to establish themselves in plots with high species richness. The presence of warm-season grasses had a strong inhibitory effect on invaders from all four guilds, suggesting they offer stiff competition for resources.
High grazer diversity enhances biomass production, a key determinant of fish yield in aquatic ecosystems. Complex interactions between consumer diversity and plant diversity lead to emergent consequences, cautioning against extrapolating conclusions from plant diversity experiments.
A new study by Stanford University researchers found that doubling carbon dioxide levels significantly reduces plant species in the wild. Exposure to high CO2 gas for three years caused a nearly 20% decline in wildflowers and an overall eight percent drop in plant diversity.
Researchers used ancient pollen data to test hypotheses on species diversity and coexistence in forests. They found that stabilizing forces, not neutral dynamics, were maintaining forest diversity, contradicting long-held views.
The Succulent Karoo, a biodiversity hotspot with high plant diversity and unique species, is receiving $8 million in grants to combat declining biodiversity. The initiative aims to empower local communities and organizations to take action in conservation efforts.
Caterpillars' shelter-building habits impact insect communities by reducing diversity, whereas artificial habitats have similar effects as natural ones. The study suggests regional patterns of insect herbivore diversity may be influenced by these ecosystem engineers.
A study by researchers at the University of Guelph and the University of Wisconsin found that rock climbing significantly reduces snail diversity and abundance on the Niagara Escarpment. The team analyzed soil samples from climbed and unclimbed sections of the cliffs, discovering a stark difference in species numbers and populations.
Gerald R. Smith pinpointed three North American regions at greatest risk for freshwater fish diversity: southern Appalachian, Klamath River Basin, and Caribbean coastal drainages of eastern Mexico. Habitat destruction due to water diversion, agriculture, and mining threatens these areas' unique species.
Study reveals floodplains have significantly higher diversity of native and exotic plants due to flooding, which washes away existing plants and transports seeds. This creates opportunities for invasive species to establish themselves, posing a threat to native plant populations.
Research found significant species diversity in riparian areas, with up to 40 times more exotic species per plot compared to uplands. Flood frequency also impacts species richness, with decreased numbers of exotic species as flood frequency decreases.
Research shows that population stability and size tend to increase with community diversity, likely due to variation in local productivity. This finding challenges ecological theory, which predicts a decline in population stability as community diversity increases.
A comparative study of plants and birds on oceanic islands found that invasive species outnumber native species, causing extinctions but increasing overall diversity. The total number of land bird species has remained relatively unchanged despite the loss of native species.
A report highlights that protecting threatened and endemic species does not automatically ensure compliance with biodiversity conservation laws. The study found that this approach falls short in preserving other bird species, especially in their habitats of distribution.
The western chimpanzee is critically endangered with only 4% of its original population remaining. Conservation efforts are underway to address threats such as agricultural development, logging, and the bush meat trade. The action plan provides a roadmap for halting or reversing the decline in chimpanzee numbers in West Africa.
Six scientists are recognized for their groundbreaking work on biodiversity conservation in China, Ecuador, Madagascar, Peru, and the US. The winners' efforts focus on tracking animal evolution, establishing national parks, studying lemur populations, and promoting indigenous cooperation.
Scientists have discovered two new monkey species, Callicebus bernhardi and Callicebus stephennashi, which are named after Prince Bernhard and Stephen Nash. These discoveries highlight the vast biodiversity of the Amazon rain forest, with over 95 species of primates found in Brazil alone.
Researchers at Duke University found that density-dependent mortality plays a role in promoting tree species diversity, just like in tropical forests. Their study suggests that preserving natural enemies is crucial for maintaining tropical diversity.
A study by researchers at the University of Michigan found that lakeshore housing development affects breeding bird communities in ways that conventional methods may miss. The study suggests that property owners can take steps to lessen the effects, such as keeping lawns small and encouraging native vegetation.