Sentences with phrase «which species populations»

Climate is increasingly controlling synchronous ecosystem behavior in which species populations rise and fall together, according to the National Science Foundation - funded study published in the journal Global Change Biology.

Not exact matches

That is, Druckenmiller can clue you to the shocking truth about your self - interest, which to defend you will need to vote Republican at all state and national levels of government, at least until the population of the endangered species Fiscally Conservative Democrat rebounds sufficiently.

«Catholic theology affirms that the emergence of the first members of the human species (whether as individuals or in populations) represents an event that is not susceptible of a purely natural explanation and which can appropriately be attributed to divine intervention.»

Jay McDaniel is not pleased that the vision of a world in which a much smaller population shares space and resources generously with other species has become unrealistic.

However, some neighbours are concerned the construction work could negatively impact the area's great crested newt population, which are protected species, The Sun reported.

On Thursday, the museum — which bills itself as the oldest in Chicago — will turn out some of its rarer animal specimens, including a small rodent called a southern rock vole and two specimens of prairie chicken, a species whose population has rapidly declined due to habitat destruction.

Cornell and the DEC announced the establishment of a $ 1.2 million laboratory dedicated to the eradication of the hemlock woolly adelgid, which are an insect species that is detrimental to New York's hemlock populations.

Warmer winters, wetter and earlier springs (which expand the time during which ticks can pick up the disease), increased humidity, and greener environments can all contribute to the increased incidence of ticks and the growing populations of hosts, including large mammals like white - tailed deer; smaller ones such as white - footed mice, the principal carrier of Lyme disease; and many species of birds.

Their claim is that the appearance of new traits in a population, generally regarded as a first step toward the evolution of new species, can occur by means other than the accumulation of micromutations (i.e., small - scale or highly localized mutations), the classic mechanism by which new traits, and eventually new species, are thought to appear.

«Much of our historical data about species» population - level responses to climate change comes from observational studies, which can suggest but not confirm causation,» said Anne Marie Panetta, lead author of the study and a post-doctoral researcher in CU Boulder's Department of Ecology and Evolutionary Biology (EBIO).

It can make courtship behaviour change between populations, which could then prevent matings between them, and lead to more diversification and eventually new species.

«I think it's a stretch to suggest more generally that tropical animal populations may be capable of rapid adaptation to anthropogenic warming,» said Mahler, who is also co-chairman of the Anoline Lizard Specialist Group, which studies which anole lizard species are at risk of extinction at the International Union for Conservation of Nature.

The variation between eastern diamondback populations could provide crucial information to authorities managing the conservation of this species, which is in decline and under consideration for listing as threatened under the Endangered Specispecies, which is in decline and under consideration for listing as threatened under the Endangered SpeciesSpecies Act.

The research also looked at how the microsporidian parasite Nosema ceranae, which is a potential major threat to honey bee populations in Europe, affects the memory and learning of both species.

According to the late Harvard University biologist Ernst W. Mayr, the greatest evolutionary theorist since Charles Darwin, «species are groups of actually or potentially interbreeding natural populations which are reproductively isolated from other such groups.»

Populations of both penguin species have plummeted in recent years, which the research blames on the loss of the tiny, shrimp - like krill that are a staple food for both birds.

«It is important to predict which native species are most at risk and to monitor their populations so that if they start to decline catastrophically, we can establish captive breeding programs and other supportive measures,» he said.

The scientists say that their paper, which is the first to quantify the stabilizing effects of population diversity, is a «game changer» because it suggests better ways of managing species everywhere.

Although the king of the jungle is fairly well studied, most research efforts have focused on individual populations rather than the entire species, which is down to perhaps as few as 20,000 individuals.

The Association of Zoos and Aquariums» Species Survival Plan manages the black - footed ferret breeding program at ex situ facilities, the breeding population in which is comprised of approximately 300 animals.

They plan to apply the new model to species such as nonhuman primates and African elephants, for which a great deal of population data exists.

Even so, he and others warn against dismissing the role of ecology in speciation, because the method here needs refinement and there are counterexamples in which ecological differences have driven populations apart into species.

The finding, experts say, has implications for conservation management, which often solely focuses on the number of animals in a population, and may extend to chimpanzees, dolphins, whales, and other species.

And even if you couldconvince people to eat nutria — the South American swamp rat introduced in the 1960s to clear Louisiana's Mississippi Delta waterways of another invasive species, water hyacinth — there's no way they'd be able to catch up with the population, which has already wiped out whole swaths of native greenery.

This conclusion is bolstered by the authors» analysis of data from a neighboring population of the same species, which revealed that females that bred in groups had a 30 % lower mortality rate than those that bred in pairs.

With the aim of studying the history and genetic diversity of the species, analysis was conducted on the genomes of another ten Iberian lynxes from Doñana and Sierra Morena, the only two surviving populations on the Iberian Peninsula, which have been isolated from each other for decades.

The report also recommends efforts to develop systematics expertise in poorer tropical countries, which contain three - quarters of the world's human population and 80 per cent of its species, but only 6 per cent of its scientists.

1.6 %: estimated proportion of marine fish species (for which trend data exist) with increasing populations, due to improved conditions including better fishing management and decreased eutrophication

Scenarios in which closely related ape species interbred after evolving into distinctive biological populations probably occurred frequently, Krützen says.

26.6 %: estimated proportion of marine fish species (for which trend data exist) that have declining populations, due to unsustainable fishing, habitat degradation, invasive alien species, eutrophication and climate change

Reduced stocking of Chinook salmon, however, would still support a substantial population of this highly desirable recreational salmon species, which is a large contributor to the Great Lakes multi-billion-dollar recreational fishery.

Hammerhead sharks, which have recently received new protections from the UN Convention on the Conservation of Migratory Species of Wild Animals, are experiencing drastic population declines in excess of 90 % in several parts of world.

The articles included 80 on climate change (47 percent); 66 on the status of a species or population (39 percent); 52 on pollution (31 percent); 23 on offshore drilling (14 percent); and five on aquaculture, which is a method for farming ocean species (3 percent).

The most famous form of this species definition may be from evolutionary biologist Ernst Mayr, who wrote in 1942: «Species are groups of actually or potentially interbreeding natural populations, which are reproductively isolated from other such groups.species definition may be from evolutionary biologist Ernst Mayr, who wrote in 1942: «Species are groups of actually or potentially interbreeding natural populations, which are reproductively isolated from other such groups.Species are groups of actually or potentially interbreeding natural populations, which are reproductively isolated from other such groups.»

These results have major implications for management strategies aimed at the recovery of Northwest Atlantic loggerheads and the projected recovery rates of this population, which is considered threatened under the U.S. Endangered Species Act.

They concluded that, based on a median value across all scenarios, there's a high probability of a 30 percent decline in the global population of polar bears over the next three to four decades, which supports listing the species as vulnerable on the IUCN Red List.

«Large - scale conservation strategies such as Panthera's Jaguar Corridor Initiative, which are instrumental to protect broadly distributed species such as jaguars, maintain their connectivity, and by doing so to ensure their long - term survival, need to incorporate genetic monitoring of wild populations to fully understand how these species respond to environmental changes and increasing levels of human impacts,» Wultsch said.

Identifying which species produce the newly discovered click varieties could help scientists better keep tabs on wild dolphin populations and movements.

Bergmann's rule holds that populations of a species in colder climates — generally located at higher latitudes — have larger body sizes than populations in warmer climates, which are usually at lower latitudes.

«Understanding the context under which blue whales make calls is a critical step in developing non-invasive, non-lethal acoustic methods to study population trends and recovery status of this endangered species,» Širovi?

To achieve this, the researchers took advantage of a phenomenon known as quorum sensing, which is used by many species of bacteria to coordinate gene regulation in response to their population density.

The animals» surprising genetic history could affect how they are protected under the U.S. Endangered Species Act (ESA), which does not have any provisions for protecting genetically mixed populations.

GC - biased gene conversion correlates with recombination rate (86), and new GC alleles reach fixation more easily in species with larger population sizes, which tend to also have smaller body sizes (87).

«We found that the rate at which a species spawn drives the relatedness between distant populations,» said Claire Paris, associate professor of ocean sciences at the UM Rosenstiel School.

Even some members of the commission's scientific committee, which tracks the health and populations of whale species worldwide, opposed the proposal, saying it undercut the committee's work, which included calculations of how many whales could be caught.

The same thing held our species back, until the population reached a critical density, unleashing the power of culture — at which point there was no stopping us.

When the Fangataufa atoll populations were decimated by the nuclear bombs, it opened up a new habitat to colonize for the free floating larvae, but which species happened to land on the reef is mostly a matter of luck.

«Our paper provides genomic evidence for the distinctness of this locally adapted population of red crossbills which could eventually result in the recognition of a new bird species, a very rare occurrence in North America,» Parchman said.

Scientists now suggest that over a quarter of all fish traditionally identified as white marlin — an overfished and endangered species — are actually «the enigmatic roundscale spearfish,» which complicates efforts to estimate and rehabilitate marlin populations.

Scientists from the universities of Granada and Almería have now carried out an exhaustive analysis of the populations of this species, and have observed that the plants found in Málaga differ significantly from those found in Granada: they have flowers with a long and straight spur, which are uniform in colour and intensely violet, except for a yellow spot at the entrance to the tube of the corolla (the area called the palate), with subtle violet veins.