For example, most populations in Alaska are Are salmon endangered worldwide? No, salmon are not endangered worldwide. For example, most populations in Alaska are healthy. Some populations in the Pacific Northwest are much healthier than others. These healthy populations usually occupy protected habitats such as the Hanford Reach on the Columbia River and streams of Olympic National Park.
Learn more: Questions and Answers What species of bats are affected by White-nose Syndrome? White-nose Syndrome mostly affects hibernating bats. More than half of the 47 bat species living in the United States and Canada hibernate to survive the winter. Twelve bat species, including two endangered species and one threatened species, have been confirmed with white-nose syndrome in North America. The causative fungus, Pseudogymnoascus Why do animals and plants become endangered?
Although extinctions occur naturally, the current rate of plant and animal extinctions is much higher than the natural or historical rates. Habitat loss is the primary cause of higher extinction rates. Other causes include habitat changes, over-exploitation of wildlife for commercial purposes, the introduction of harmful nonnative species, Filter Total Items: 7. Year Published: U. Reichert, Brian E. View Citation. Reichert, B.
Geological Survey Fact Sheet —, 2 p. Year Published: Status and threats analysis for the Florida manatee Trichechus manatus latirostris , Trichechus manatus West Indian manatee , especially T. Runge, Michael C. Runge, M.
Geological Survey Scientific Investigation Report —, 40 p. Year Published: Early action to address an emerging wildlife disease A deadly fungal pathogen, Batrachochytrium salamandrivorans Bsal that affects amphibian skin was discovered during a die-off of European fire salamanders Salamandra salamandra in Adams, M.
Camille; Grear, Daniel A. Geological Survey Fact Sheet , 2 p. Year Published: Using genetic research to inform imperiled and invasive species management The long-term viability of species and populations is related to their potential to migrate, reproduce, and adapt to environmental changes. Hunter, Margaret E. Virgin Islands. Using genetic research to inform imperiled and invasive species management; ; FS; ; Hunter, Margaret E.
The Xingu river is the site of the world's third largest hydro-electric dam, the Belo Monte project where square miles square km will be flooded. Many indigenous people such as the Kayapo Indians are concerned about the potential loss of land. The construction was completed in The big companies and governments who propose these developments of the rainforest usually offer incentives for the affected people such as jobs, schools and clinics. Many feel this is a good exchange and may improve their standard of living, although the reality can be far from that.
In many cases, promised compensation is not delivered. The destruction of the rainforest could affect the world's climate. During the day, the rainforests absorb huge amounts of carbon dioxide from the air to make food in a process called photosynthesis.
A by-product of photosynthesis is oxygen. On the contrary, burning the rainforest is like creating a huge bonfire, throwing massive amounts of carbon dioxide into the atmosphere. Carbon dioxide or CO2 is a 'greenhouse gas', which helps to retain the heat of the sun within the Earth's atmosphere.
By burning the rainforest, we are not only adding huge amounts of CO2 to the atmosphere, but we are also reducing nature's ability to absorb CO2 and to produce oxygen.
The more the rainforests are cut down and burned, the more the 'lungs' of the earth will be damaged. Deforestation is responsibly for more global carbon emissions than all the planes, trains, buses and cars in the world put together! Rainforests also help to transport huge volumes of water vapour through the atmosphere in 'flying rivers'.
Water falls on the rainforests, is absorbed by the trees and then evaporated from their leaves in a process called transpiration. When the trees are removed, the flying rivers stop flowing. Rainforests Why are They Important? What are the Threats to the Rainforests? Forests are destroyed for a number of reasons:- 1 The growth of populations in countries with rainforest. Logging Fortunes can be made in the rainforest. Palm Oil Have you heard of palm oil?
Pet food and palm kernel meal Cats, dogs, pigs, cows and goldfish. Food for thought In Britain we destroyed our ancient forests thousands of years ago and used the land for farming. Mining Beneath rainforests there often lies a wealth of natural resources in the form of mineral and gold deposits.
Fisheries and forestry often allocate greater harvest limits than the ecosystem can produce without declining. For example, the mountain ash forests of Victoria rely on severe wildfires to regenerate.
They are also extensively logged for paper and timber production. Yet the organisation responsible for scheduling of logging in these forests VicForests does not account for losses due to fire when calculating how much timber can be harvested. Major fires in badly damaged more than 52, hectares of this forest. But environmental accounting analyses indicate there has been relatively little change in sustained yield allocation since these fires.
This amount should therefore should not be included as timber available for logging. Another driver of the problem of resource over-commitment can be gaming, where stock availability and direct employment are deliberately overstated. This may be to secure the status and influence of a given institution with government, or for other reasons such as leverage in negotiations over access to resources. The autobiography of Julia Gillard , the former Australian prime minister, suggests this occurred during debates over the fate of forests in Tasmania, alleging that Forestry Tasmania overstated forest available for harvest.
Forestry Tasmania denied these allegations. Early intervention in fisheries and forestry industries can prevent ecosystem and industry collapse. We also need to better ways to assess resources, including accounting for losses of resources due to natural disturbances.
Moreover, the introduction of invasive plant and animal species puts in serious danger the natural composition of the area. The ecosystem composed by mounds, depressions and flooded areas is home to a myriad of organisms under which a large amount of carbon lies and when destroyed releases greenhouse gases that alter habitat conditions. The problem in the Senegal River basin is particularly serious. Indigenous communities in Senegal, Mali and Mauritania have been displaced due to intensive agriculture , construction of dams and livestock exploitation.
Floodplains, which used to maintain an optimal balance between drought and high waters, have been altered and even granivorous birds that helped maintain the ecosystem have emigrated.
The case of the Aral Sea, probably dry after years, is the symbol of destruction. IUCN has listed this ecosystem as unrecoverable , as it used to be in the fourth largest lake in the world and now it's not even be in the top twenty.
It has lost 28 of its native species because of desertification, and pesticides and salinity make it impossible to continue growing cotton and grain, an economic engine for the area. In the 60s, the Soviet government decided to set up an irrigation platform, including 20, miles of canals , 45 dams and more than 80 reservoirs to serve the fields of agriculture in Kazakhstan and Uzbekistan. Thank you. You had already voted.
Caribbean coral reefs. Alaskan kelp forest.
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