Sentences with phrase «on bird populations in»

«This is a prime example of how intensive management of forest lands for industrial purposes can have a direct impact on bird populations in a positive way.»

Not exact matches

They used information on birds and trees in landscapes with different levels of production output to project how different species» population sizes would respond to different ways of using the land.

A three - year study in Denmark concentrated on the non-crop habitats, such as hedgerows, of conventional and organic farms and their effects on bird populations.

Focus on Feeders helps us understand the changes in populations during this stressful time of year for birds.»

LINCOLN, MA — Help keep bird populations strong and healthy throughout the coldest season and all year long by participating in Mass Audubon's annual Focus on Feeders statewide winter bird count Saturday and Sunday, February 1 - 2.

Help keep bird populations strong and healthy throughout the coldest season and all year long by participating in Mass Audubon's annual Focus on Feeders statewide winter bird count Saturday and Sunday, February 1 - 2.

Researchers from Radboud University in the Netherlands found that in the two decades since Dutch farmers began using the pesticide on a variety of crops, the birds» population declined by an average of 3.5 percent annually in farmlands where local water levels contained high concentrations of the chemical.

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.

«If you only consider local birds in an environmental assessment, you're not really evaluating the effect that facility may have on the entire population,» Katzner said.

«It's highly likely that in the future, drones will be used to monitor populations of birds and animals, especially in inaccessible areas where on the ground surveying is difficult or impossible.

To investigate the impacts of climate fluctuations on Northwestern migratory bird populations, ecologist M. Philip Nott and colleagues at the Institute for Bird Populations in Point Reyes Station, California, captured birds in «mist» nets at 36 stations in forests of Oregon and Washington between 1992 and 2bird populations, ecologist M. Philip Nott and colleagues at the Institute for Bird Populations in Point Reyes Station, California, captured birds in «mist» nets at 36 stations in forests of Oregon and Washington between 199populations, ecologist M. Philip Nott and colleagues at the Institute for Bird Populations in Point Reyes Station, California, captured birds in «mist» nets at 36 stations in forests of Oregon and Washington between 1992 and 2Bird Populations in Point Reyes Station, California, captured birds in «mist» nets at 36 stations in forests of Oregon and Washington between 199Populations in Point Reyes Station, California, captured birds in «mist» nets at 36 stations in forests of Oregon and Washington between 1992 and 2000.

In a paper published in today's issue of Science, they present evidence that when the Isthmus of Tehuantepec in Mexico dried out, it split up dozens of bird populations that now live on either side of the dry areIn a paper published in today's issue of Science, they present evidence that when the Isthmus of Tehuantepec in Mexico dried out, it split up dozens of bird populations that now live on either side of the dry arein today's issue of Science, they present evidence that when the Isthmus of Tehuantepec in Mexico dried out, it split up dozens of bird populations that now live on either side of the dry arein Mexico dried out, it split up dozens of bird populations that now live on either side of the dry area.

In the case of the passenger pigeon, Hung and his colleagues concluded that the population of breeding birds was roughly 330,000 on average, falling to as few as 50,000 birds at points in the last million yearIn the case of the passenger pigeon, Hung and his colleagues concluded that the population of breeding birds was roughly 330,000 on average, falling to as few as 50,000 birds at points in the last million yearin the last million years.

«We don't know how many tree sparrows there are in China but the size of the consignment underlines the volumes of birds being sold — and it must have some effect on wild populations.»

Once there, oil could hammer marsh dwellers, nesting shorebirds, migratory shorebirds on heroic migrations from South America traveling to as far north as the Arctic, and some fishing birds whose main populations thrive in the Gulf.

The study, compiled by the North American Bird Conservation Initiative and the first of its kind to look at the vulnerability of bird populations in Canada, the United States and Mexico, said 37 percent of all 1,154 species on the continent needed urgent conservation actBird Conservation Initiative and the first of its kind to look at the vulnerability of bird populations in Canada, the United States and Mexico, said 37 percent of all 1,154 species on the continent needed urgent conservation actbird populations in Canada, the United States and Mexico, said 37 percent of all 1,154 species on the continent needed urgent conservation action.

Shifting to renewable energy sources has been widely touted as one of the best ways to fight climate change, but even renewable energy can have a downside, as in the case of wind turbines» effects on bird populations.

The bald eagle was nearly extinct in the continental U.S. by the late 20th century, but the population has since stabilized, primarily due to habitat protection and a ban on DDT, an insecticide that weakened the birds» eggs so much that the eagles could not produce viable offspring.

They monitored the birds after their release, tracking their survival and breeding success, as well as collecting the same data on 36 - 110 breeding pairs per year in the original national park population.

«Playback experiments between geographically isolated taxa provide key data on how populations might perceive each other in terms of «same» or «different» if they were in actual contact,» according to Louisiana State University's J.V. Remsen, an expert on Neotropical birds who was not involved in the research.

Oppel and his team found that they could use audio recordings to estimate a bird's population size after testing the method on a raucous colony of Cory's shearwaters that breeds on a small island in the Azores called Corvo.

The research, published in the British Trust for Ornithology (BTO) journal Bird Study, looked at the breeding populations of three species of large gull; Herring Gull, Great Black - backed Gull and Lesser Black - backed Gull on the Hebridean island of Canna, and the relationship between these gull populations and the fall in the quantity of fish landed in the nearby harbour of Mallaig.

In 1959, the world population of this bird stood at just 26 individuals on Cousin, an island in the Indian Ocean less than a third of a square kilometre in areIn 1959, the world population of this bird stood at just 26 individuals on Cousin, an island in the Indian Ocean less than a third of a square kilometre in arein the Indian Ocean less than a third of a square kilometre in arein area.

The bacterial population studied in Jiang's lab included as many as 100 million organisms, far more than the number of birds on the Galapagos Islands.

It's one of the largest intact forest ecosystems left on Earth; it's actually only three or four places that have these large unfragmented habitats left and because of that it holds some of the largest populations of mammals and birds — some of the largest populations of wolves, for example, in, caribou as well as, we estimate one to three billion birds that nest there every year and that's some of the birds that are actually stopping off at Central Park.

To better understand the interacting effects of habitat degradation and climate on bird populations, researchers from the U.S. Forest Service Pacific Southwest Research Station (PSW), Klamath Bird Observatory, and Costa Rica Bird Observatories spent 12 years studying the White - collared Manakin, a fruit - eating tropical bird, in mature and young forests along the Caribbean coast of Costa Rbird populations, researchers from the U.S. Forest Service Pacific Southwest Research Station (PSW), Klamath Bird Observatory, and Costa Rica Bird Observatories spent 12 years studying the White - collared Manakin, a fruit - eating tropical bird, in mature and young forests along the Caribbean coast of Costa RBird Observatory, and Costa Rica Bird Observatories spent 12 years studying the White - collared Manakin, a fruit - eating tropical bird, in mature and young forests along the Caribbean coast of Costa RBird Observatories spent 12 years studying the White - collared Manakin, a fruit - eating tropical bird, in mature and young forests along the Caribbean coast of Costa Rbird, in mature and young forests along the Caribbean coast of Costa Rica.

Old - school conservation might have called for flooding the area temporarily, something bird - watchers did in fact insist on when the spoonbill population crashed.

Birds play an important role in a wide variety of ecosystems as both predator and prey, in controlling insect populations, pollinating and seed dispersal for many plants, and in releasing nutrients on to land and sea in the form of guano.

The impacts of the wetland maintenance programmes carried out in the wetlands of southern Finland on stopover and nesting bird populations were studied in 2004 - 2012.

Using bird - bands, photographs, and DNA fingerprinting, the researchers closely tracked the goings - on in a population of buntings living in a shrubby prairie habitat outside Missoula, Montana.

In addition, they are carrying out similar studies to measure the effects on bird populations of «conventional» pollutants such as pesticides and other heavy metals, as well as new molecules such as perfluorinated compounds that are also accumulating in the AntarctiIn addition, they are carrying out similar studies to measure the effects on bird populations of «conventional» pollutants such as pesticides and other heavy metals, as well as new molecules such as perfluorinated compounds that are also accumulating in the Antarctiin the Antarctic.

(The Condor: Ornithological Applications, May 6, 2015)-- Shifting to renewable energy sources has been widely touted as one of the best ways to fight climate change, but even renewable energy can have a downside, as in the case of wind turbines» effects on bird populations.

They provide control on populations of small mammals and birds, such as beaver, geese and wild turkeys, and can help to provide stability in the composition and numbers of general wildlife populations (Voigt and Berg 1999, Gompper 2002).

Implementing just sterile male and RIDL would take years and would, in the interim, allow development of the gene drive technologies whilst at the same time driving down mosquito populations and thereby reducing the current pressure on threatened bird species.

He has particular interests in (1) the use of ancient DNA methods to document changes in genetic variation through time and phylogenetic relationships of extinct or endangered organisms (especially of the recently extinct Hawaiian avifauna); (2) the use of highly variable genetic markers to measure genetic structure and relatedness, and to ascertain mating systems, in natural populations, and (3) the use of genetics to study the evolutionary interactions between hosts, vectors and infectious disease organisms (e.g., major projects on introduced avian malaria in native Hawaiian birds and invasive chytrid fungus in amphibians).

As the UK's Royal Society for the Protection of Birds notes, in refreshingly straightforward language: «Despite the large numbers of birds killed, there is no scientific evidence that predation by cats in gardens is having any impact on bird populations UK - wide... It is likely that most of the birds killed by cats would have died anyway from other causes before the next breeding season, so cats are unlikely to have a major impact on populations.&rBirds notes, in refreshingly straightforward language: «Despite the large numbers of birds killed, there is no scientific evidence that predation by cats in gardens is having any impact on bird populations UK - wide... It is likely that most of the birds killed by cats would have died anyway from other causes before the next breeding season, so cats are unlikely to have a major impact on populations.&rbirds killed, there is no scientific evidence that predation by cats in gardens is having any impact on bird populations UK - wide... It is likely that most of the birds killed by cats would have died anyway from other causes before the next breeding season, so cats are unlikely to have a major impact on populations.&rbirds killed by cats would have died anyway from other causes before the next breeding season, so cats are unlikely to have a major impact on populations.»

«Any bird populations on the continents that could not withstand these levels of predation from cats and other predators would have disappeared long ago, but populations of birds on oceanic islands have evolved in circumstances in which predation from mammalian predators was negligible and they, and other island vertebrates, are therefore particularly vulnerable to predation when cats have been introduced.»

The small population that re-established on mainland Ascension in 2012 grew rapidly from 2 pairs in 2012 (of which 1 chick successfully fledged) to > 100 pairs in 2016, and is expected to grow further as more birds re-distribute from Boatswainbird Island.

«So let's stabilise the population in Tasmania, and have the scientists research whether it is good for the Tassie devil and good for the broader native Australian population with regards to native birds, native mammals on the mainland.»

``... the ecological and conservation significance of these kill tallies is difficult to contextualise, because (1) there are no reliable estimates of the total population of birds in Australia; (2) predation may fall disproportionately on some bird species; (3) some bird species may be able to sustain high mortality rates and maintain viable populations but others may not; and (4) as demonstrated here, there is substantial spatial variation in the numbers and proportion of birds killed across Australia.»

Impacts of Free - ranging Domestic Cats (Felis catus) on birds in the United States: A review of recent research with conservation and management recommendations (2009) HAHF cites the 2009 paper co-authored by former Smithsonian researcher Nico Dauphiné (who resigned after being found guilty of attempted animal cruelty last year, after rat poison was found in cat food outside her apartment building) as evidence of «the incredible impact of free ranging cats on the bird populations of the U.S.» Among the many flaws in «Impacts of Free - ranging Domestic Cats» was the authors» estimate of «117 to 157 million exotic predators,» which was based on David Jessup's inflated (and, not surprisingly, unattributed) «estimate» of «60 to 100 million feral and abandoned cats.»

Fact: While cats are predators by nature, responsibility for the decline in bird and wildlife population falls squarely on the shoulders of the human species.

Counting Cats and Counting Birds In both studies, the authors quantified the impact of cat predation on bird populations by comparing different levels of predation with different bird densities.

On islands and in fragmented urban and suburban habitats unnaturally high densities of cats are not only capable of reducing or eradicating populations of birds and small mammals, they can out - compete native predators like foxes and weasels.

In fact, we need to take a long look at our own species» affect on bird populations.

«Despite the large numbers of birds killed, there is no scientific evidence that predation by cats in gardens is having any impact on bird populations UK - wide,» explains an article on the RSPB website.

And, although TWS acknowledges the risks to «reptiles, birds, and mammals [digesting] spent ammunition and lost fishing tackle... potentially leading to population - level consequences in some species (e.g., waterfowl, eagles, condors, mourning doves, and loons),» [12] their position statement on the subject is anemic.

A study based solely on pet owners with birds doesn't come close to representing the vast and diverse population of birds kept in captivity; nor does it adequately reflect the nature and extent of the myriad of issues involved in addressing all aspects of captive bird welfare.

Additional Evidence Many researchers have disputed the kind of broad, overreaching claims Lebbin et al. make about the impact of cats on bird population (and wildlife in general).

Forty of these species are often present in urban or suburban landscapes, where impacts of high cat densities on bird populations have been demonstrated elsewhere.