Sentences with phrase «declining wild populations»

Not exact matches

Declines in populations of pollinators now threaten both the yields of major food crops and the survival of wild plant species.

The analysis uncovered major changes in population growth; with the exception of wolves, all species experienced a drop in population growth rates immediately following the collapse, and three species — wild boar, moose, and brown bears — exhibited significant reductions in population growth throughout the decade following the collapse, with declines evident in 85 % or more of the study regions.

Although considered one of the most successful predators on Earth due to the high kill - rate their cooperative hunting achieves, African wild dog populations are declining due to pressures including habitat loss and human - wildlife conflict.

African wild dogs are one of the world's most endangered carnivores and their populations are in decline, with estimates suggesting that fewer than 700 packs currently remain in the wild.

According to recent studies, declines in wild and managed bee populations threaten the pollination of flowers in more than 85 percent of flowering plants and 75 percent of agricultural crops worldwide.

Over the past few decades, a small international clan of scientists, alarmed by the sudden decline of corals, have created underwater nurseries aimed at «replanting» corals to buttress wild populations.

Wild populations quickly declined as European settlers moved into the area.

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.

Giraffe populations have declined by some 40 percent in the last 30 years, with fewer than 98,000 individuals left in the wild.

The study shows these losses are driving population declines of the world's wild African elephants on the order of 2 percent to 3 percent a year.

This approach is ill suited to horses as the only surviving population of wild horses has experienced a massive demographic decline in the 20th century.

The finding was bad enough: During the last two decades, the population of wild chimpanzees and gorillas in the West African nations of Gabon and the Republic of the Congo has declined by more than half.

The scientists found that wild bee populations declined in 23 percent of the contiguous United States.

Wild bee populations in parts of the United States are declining, largely due to habitat loss in areas with intense farming.

But a new computer model shows that wild bee populations are declining in many agricultural areas.

The coincidence of N. bombi infections and losses of bumblebees in wild and commercial populations suggests the fungus is a key player in bumble bee declines, Cameron said.

In making its decision, the agency looked to the requirements of the Marine Mammal Protection Act (MMPA), which does not allow the removal of marine mammals from the wild if doing so contributes to a population's decline.

Scientists hoping to explain widespread declines in wild bumble bee populations have conducted the first long - term genetic study of Nosema bombi, a key fungal pathogen of honey bees and bumble bees.

Today only 1,300 - 1,400 of the animals exist in the wild, and their populations have declined about four percent annually in recent years.

Declines in the pollination of wild plants may lead to increases in the population of plants that do not rely on pollinators, and pollinator declines would lead to decreases in crop yields, FuenteDeclines in the pollination of wild plants may lead to increases in the population of plants that do not rely on pollinators, and pollinator declines would lead to decreases in crop yields, Fuentedeclines would lead to decreases in crop yields, Fuentes noted.

Rabinowitz acknowledges the greater urgency for captive breeding, but disputes whether the data on population size, sex ratio and breeding success in the wild are good enough to say that wild populations are in terminal decline or that captive breeding — «an absolute last resort», he says — is the only option.

«In lieu of a practical means of delivering [canine distemper virus] vaccines to wild tigers, the most viable strategy to ensure their conservation is the maintenance of large connected populations within protected areas that buffer the effects of local declines,» Gilbert and colleagues write.

This flexibility could help bumble bees in the wild, which face widespread population declines.

Since Christophe Boesch began studying wild chimpanzees in the Taï forest in Côte d'Ivoire in 1979, the animals» populations have declined by more than two - thirds.

The puzzling finding comes on the heels of other studies linking fungicides to declines in honey bee and wild bee populations.

As global populations of domestic bee pollinators decline, it is of utmost importance for us to understand what factors attract wild pollinators such as hoverflies to flowers, and how these preferences differ in the face of environmental change.

As their intake of displaced orang - utans increases, and as suitable habitat for reintroductions declines, there have been suggestions that they hybridize Bornean orang - utan subspecies — either in isolated, «mixed» populations, or within existing wild populations.

As global populations of domestic bee pollinators decline, it is of utmost importance for us to understand the factors that attract wild pollinators such as hoverflies to flowers, and how these preferences differ in the face of environmental change.

By Patrick J. Kiger, Discovery News Over the past 20 years, North America's population of monarch butterflies has declined by a catastrophic 90 percent, a plight that may be caused by pesticides and loss of the once - vast acres of wild milkweed that are the creatures» food source.

Over the last 10 years, wild populations have declined more than 30 percent due to habitat loss and illegal capture for the pet trade.

Results from these studies were incorporated into many Species Survival Plan Programs, helping to create genetic safety nets for the declining populations in the wild.

He says wild animal populations have experienced steep declines.

After wild boar and wolves became extinct in Ireland, there was a decline in the Irish Wolfhound population.

While the decline can hardly be laid at the feet of the pet industry — freeway deaths more than exceed any culling of wild populations for the pet trade — box turtles are notoriously short - lived in captive situations.

The island also supports a large population of feral pigs, which are no doubt responsible for the decline in sightings of pumilus in the wild by Nature Conservancy personnel and others.

The extra helping of woodland and wetland would go a long way to supporting the UK's declining population of wild things — including many species that are a source of anxiety for conservationists — and deliver more space for recreation.

On behalf of the North Atlantic Salmon Fund (NASF), representing Icelandic and Faroese fisherman, 2007 Goldman Prize winner Orri Vigfusson wrote a strongly worded letter to all Members of Scottish Parliament accusing the country of contributing to a catastrophic decline in north Atlantic wild salmon populations.

Bee population declines aren't new - we've steadily gone from 6 million captive hives in 1947 to about 2.5 million today - but the rate of decline has never been higher, and the situation is far worse for wild bees, threatening global biodiversity.

A shocking decline in the Russian Federation's wild tiger population highlights the importance of eliminating trade in and demand for tiger parts, the International Tiger Coalition (ITC) said today.

Experts agree that as wild fish stocks decline and the world's population grows we will increasingly rely on aquaculture to feed the hungry planet.

And overzealous collectors have caused the population to decline by over-collection of specimens for science as well as for the illegal wild animal trade.

At that time, the decline in the wild turkey population was so significant that the National Wild Turkey Federation (NWTF) was founwild turkey population was so significant that the National Wild Turkey Federation (NWTF) was founWild Turkey Federation (NWTF) was founded.

Rhinos Nearing Extinction After 50 Years of Poaching Rhino poaching, often practiced to remove the animal's horn, has helped cause an extraordinary decline in populations throughout Africa and Asia — for example, there is thought to be about 130 Javan rhinos and only 300 Sumatran rhinos left in the wild.

The top three contributions to the decline of the wild African lion population, as addressed by the filmmakers, are: 1.