Some of the more famous invasive species in the United States are the Emerald Ash Borer, the Asian Carp, and the Africanized Honey Bee. Invasive species cause extreme amounts of damage to wildlife and the economy. By 2019, it is estimated that the Emerald Ash Borer will have costed the United States $10.7 billion (Kovacs et al, 2010). A textbook example of an invasive species is the brown tree snake on the island of Guam. It has driven ten of the twelve native forest bird species there to extinction.
In our world today many animals and plants are loosing their fight against human intervention in their once well-balanced ecosystem. We are all aware of the extinction of the dinosaurs and the dodo birds, however most people do not realize that annually thousands of species of our flora and fauna are now becoming extinct. This on going trend is increasingly threatening our bio diversity and global ecology. To give a specific example of animal depletion I will focus on Canadian bears. The following factors are responsible for their decline.
Over half of the forests in the world have already been destroyed and this nu... ... middle of paper ... ...eir skin and bones (“Poaching”) However, many other types of animals are the victim of poaching, including bears, big-horned sheep, alligators, and even birds (The Humane Society of The United States). While poaching is illegal, the significant profits from illegal wildlife trade draw many people to it (“Poaching”). The easiest way to decrease the amount of poaching is to enforce existing laws, create stricter laws, and increase the sentences for convicted poachers. It is impossible to ignore the devastating effects of deforestation, water pollution, and poaching. However, through wildlife conservation efforts, these effects can be reduced, or even stopped.
Global Warming Endangers the Lives of Grizzly Bears There are less then 1000 grizzly bears left in the lower 48 United States, around 400 of them live in Yellowstone National Park. These endangered, and beautiful bears, are threatened by many factors, most significantly the fragmentation of their habitat by roads. The latest threat to this species is the Global Warming trend that is threatening the White Bark Pine Tree, which is very important to the grizzly bear diet. Grizzly bears need to eat a great deal of fat in the fall in order to prepare for hibernation. Female grizzlies who don't get enough fat may develop fertility problems.
Now, they are small as plankton and many fish can ingest them. This will kill the fish and animals that eat the fish if they did not die yet and this will lead to a decree in food and an increase in starvation in countries that depends on the fishing industry to survive. This illustrates just only one way on how plastic bags affect the ecosystem and then back around to us. Another reason why plastic bags should be ban is other countries like Australia have already banned them. In May 4 2009, the ban on any light weight plastic bag was ruled and now any stor... ... middle of paper ... ...g it a cleaner America.
“Globally, however, infectious... ... middle of paper ... ...tists concluded that ocean warming and acidification are the two greatest global threats that leads species to extinction. Human activity is the third reason that leads them into fatal and death of species. Human activity was involved in the past five great mass extinctions and they were related directly or indirectly. The directly of human activity that leads to extinction are habitat change, destruction, overexploitation of species, the spread of aggressive species and genes, pollution and climate change as humans use mainly all the earths lands for construction and they get advantage on fresh water rivers and limit natural rivers and unfortunate that drives species into massive fatal. While humans’ burn fossil fuels, the carbon dioxide have risen to their highest levels all over these years and that leads to global warming, rising sea levels and climate change.
Every day whales around the world are being killed. Although some whales are being killed for scientific purposes, the majority of them are killed for their meat by poachers or whalers working for different countries. Careless companies dispose of their waste incorrectly, and in today's society, people do not seem to care about anything but themselves. Arguments can be made both for saving the whales and for killing them; this is a topic that has caused much debate over the past two decades, not only in America, but worldwide. Environmentalists and international governing groups have squared off against whale poachers and countries who ignore the laws governing whales, in an attempt to stop the ongoing, unnecessary killing.
The gray wolf was highly targeted for killing due to the fact that it was seen as an undesirable predator. This view of the wolf likely stemmed from fear of livestock impacts, fears of decrease in game animals, and even possibly folklore that depicts the wolf as something to be feared (Galipeau, 2013). The U.S. Biological Survey began a program in 1907 called Animal Damage Control due to pressures from the western livestock industries (Creel and Rotella, 2010). This program focused on predator control and alone killed 1,800 wolves in 39 U.S. National forests in just one year (Creel and Rotella, 2010).
There are many impacts that fishing and land animal farming have on the ocean, which are detrimental to ocean ecosystems as well as many other aspects of the environment. Overfishing, killing fish at a much quicker rate than the fish can repopulate, is one major problem. Three-fourths of the world’s fisheries are either fully exploited, overexploited, or depleted (Cowspiracy). Researchers have estimated an end of all viable fisheries by 2018 if the current trends of fishing continue (Mason). According to the Monterey Bay Seafood Watch, hundreds of thousands of animals die every year as bycatch, with one of the worst offenders being shrimp fisheries, catching up to six pounds of bycatch per pound of shrimp.
The Asian carp pose a serious threat to the economy of Michigan and neighboring states as well as the natural environment. If the government does not act quickly then these terrifying fish will invade the Great Lakes. Asian carp were first imported to the United States from Southeast Asia in the 1970’s in order to filter pond water in Arkansas. They are actually three different species of carp, Black carp, Silver carp, and Bighead carp (www.nwf.org/Wildlife/Threats-to-Wildlife/invasive-Species/Asian-Carp.aspx). Silver carp can grow up to thirty-nine inches and sixty pounds.