Dr Euan Ritchie stated “When sharks were culled in Hawaii there was no long-term benefit because sharks attacks occurred immediately after”. Why then, waste billions of taxpayers’ money on a solution that has previously shown it does not work? In South Africa, again, according to statistics from the KwaZulu-Natal Shark Board, “less than 18 per cent of marine life caught on drum lines in South Africa in the 2011 to 2012 financial year have been great white or tiger sharks” with animals mentioned in the above paragraph contributing to the other 78%. A large scale cull would be highly redundant then as Australia would be no different from Hawaii and South Africa. In New South Wales and Queensland “there have been severe shark attacks on beaches that are protected by nets”, highlighting how wrongly this issue is being
Deforestation is when trees and other vegetation is being removed converting the forest to another land use, this exposed the soil and often leads to erosion and loss of soil fertility. The valuable nutrients of the soil are being washed away by erosion. To prevent this, we need to stop cutting down trees to create so many buildings, business owners should try to find established dwellings to put their business on. Deforestation also poses a threat to the food chain. These three major causes of soil erosion can be prevented and it will benefit everyone as a whole by creating a sustainable society for our environment.
Orcas in captivity face premature death, “In the wild they have an average life expectancy of 30 to 50 years—their estimated maximum lifespan is 60 to 70 years for males and 80 to over 100 for females. The median age of orcas in captivity is only 9, and orcas at SeaWorld rarely make it even to the average life expectancy of their wild cousins.”(SeaWorld oh Hurt) Orcas need to swim up to a hundred miles each day but in the parks they are only confined to a tiny pool and forced to swim in the same space their entire life. Being in such small spaces, light has been shed on the fighting between killer whales. “Orcas who are not compatible are forced to live in tight quarters together. The resulting anxiety and tension cause fights between orcas.
This means that the survival of this species would be threatened. Also, one more con of this mine is that it would have a huge effect on the native people. Their whole culture is based off this fish and wildlife due to their consumption of these animals, and any accident could end this culture along
The largest human cause of dead zones is nutrient run off from abundant use of fertilizers, animal waste and sewage. The runoff is a bi-product of our agribusiness, farming practices and growing population. Before immense land development the wetlands acted as a natural barrier and filter. The runoff would be depleted in the soil by the plants before it could reach the rivers and ocean. Human commercial activity and land development have destroyed the natural shield of the wetlands.
Amphibians, reptiles, invertebrates and small mammals are part of their diet too. Unfortunately, eating these organisms can sometimes put endangered and rare species at a greater risk. Corn, barley, wheat, seed, grain and oat crops are the main vegetation that they feed on. Figure 1 & 2 (last page) shows the extent of feral pigs impact on threatened species in 2008. Feral pigs usually stay close to water so they can drink regularly and to control their body temperature, as they are extremely susceptible to heat.
Bio 100 Homework due 11/05/12 Name : Nicholas Oliveira Go to the website on cheetah conservation www.Cheetah.org and read the following sections under the tabs About Cheetahs: Intro, Genetic Diversity, & Race for Survival 1. Why are cheetahs endangered? Our attitudes and misconceptions about these species have led to their endangerment because many people deal with their fear by eliminating predators. 2. What are the 5 most common causes of extinction?
This combination makes waters toxic to crayfish, clams, fish, and other aquatic animals. It also affects the food sources of herbivores and insects. How does acid rain affect the environment? Acid rain has a hand in global warming as well which is rapidly changing climates around the world. With the climate changes many plants and animals are having to relocate or are dying because they are not fit for the changes in their surroundings.
With an average of 6.3 million kilograms of trash being pumped into our oceans every year, it won't be very long until they reach breaking point. One of the most common pollutants in our oceans is plastic. In the United States, it has been estimated that two million plastic beverage bottles are used every five minutes and that marine litter now contributes sixty to eighty percent of plastic. Estimates for plastic shopping bags range from five hundred to a thousand years to breakdown. This is potentially devastating in that plastic is often mistaken for food by marine animals,
I feel that "extinction" is not something that has to happen, but happens because humans do not take care of the natural world, the way they should. Many extinctions, including birds and other living creatures, can simply be avoided if humanity put it in their best interest to change the way we run our ecosystem, considering how much these beautiful creatures help us maintain this earth. One of the greatest threats a bird endures is habitat loss. Birds from all regions such as forests, wetlands, grasslands, mountains, etc are losing their homes and resulting in their extinction. Another threat as previously mentioned is from humankind.