Influence on ecosystems range from human causes like the bulldozing of a forest to natural causes like a fire or a flood. In recent times, the introduction and spread of invasive species has transformed native communities rapidly and, in some cases, created irreversible damages. In the Earth’s history, changes have often occurred in the ecosystems. For example, glaciers and the retreat of glaciers cause wide-spread changes. However, although change is a constant in ecosystems, animals and habitats often cannot adapt to the rapid alterations of non-natural stresses.
Invasive species are organisms that have “moved into an area in which it previously did not exist” (Snider, Mahan, and Holloway).Often times, the introduction of invasive species is usually for the purpose of controlling a native species that is considered a pest, but sometimes they are introduced because people are importing them as pets or ornamental plants, and even sometimes they are introduced as a mistake (Evans). Many environmental scientists consider invasive species as the most dangerous cause of endangerment, because they affect the biodiversity of ecosystems and biological communities, thus affecting the natural food webs and habitats of species. Ehrlich actually contributes fifty-four percent of the one hundred and seventy extinct species, of which the causes of extinction have been reliably identified, directly to invasive species (Ehrlich 37). Therefore, the introduction of invasive species to any new environment causes a threat to the ecosystems, as the foreign species will fight to survive and ultimately thrive in its new environment, meaning that invasive species hold the risk of pushing native species into extinction (Ehrlich
The majority of Americans still believes and holds into values that this act created years ago for the conservation, but there are some “commercial industries and ultra-conservative political interests” that are constantly threatening this environmental legislation. Apparently the goal of these several revolutionary groups are to devitalize and obstruct their funds so that the Act can no longer keep up with their program and accomplish their goals. That is why as more species are in need of protection, Endangered Species Act is a vital tool for keeping wildlife conservation. They are capable of avoiding extinctions of more species and returning the species that are in captivity to their habitat when they are fully recovered and in a good condition. According to many standards used by different existent environmental groups, the ESA is represented with a 90 percent success
Habitat destruction can be caused by many things. These include: The introduction of alien (exotic) and domesticated species Pest and Predator control The collection of animals for pets and research Pollution Ecological factors Loss of keystone species Overexploitation Disease Limited distribution Many of these causes could be prevented fairly easily. If people today would just follow some simple rules, none of these would be as big as they are now. The Introduction of Alien (Exotic) and Domesticated Species Introducing exotic species has been a highly debated issue. Why should we bring another animal or plant into a region to eradicate another species?
Some of the biological effects of introduced species on the Pacific coast would be food chain imbalance, taking over native species, and other native species being endangered as food and space become limited. 8. Some of the biological effects of introduced species in Tennessee would be ecosystem destruction which results in over population of certain species, raise of new diseases, food chain damage, native species competing for food and space. Discussion questions: 1. Bio-terrorism is surely possible as it easy for someone to secretly introduce a foreign species.
Threatened and endangered species should be protected for future generations to be able to experience their existence and necessity. Animals are beneficial to the agricultural needs of humans. The wild relatives of common crops such as: corn and wheat, contain vital disease-resistant material. They also could be used to create new crops that can grow in insufficient lands Background Info When a species becomes endangered, it means that the species is being threatened with extinction. Since the beginning of time, numerous species have gone extinct due to naturally changing physical and biological conditions.
An effective ecosystem must be viable before massive change, as well as after destruction when certain members are compromised. This internal concession holds true for any manmade defense mechanism designed to withstand natural disasters. Finally, a system relying on the diversity of both... ... middle of paper ... ...hins how to warn people about tsunamis. Human safety. Accessed 29 November 2013 from < http://biomimicry.net/about/biomimicry/case-examples/human-safety/> Sudmeier-Rieux, K., Masundire, H., (2006).
If this was to occur, the ecosystems of the Midwest region would be significantly impacted in a negative way. As reported by the USDA (United States Department of Agriculture), Eurasian milfoil, which is native to Europe, Asia, and Northern Africa, was most likely accidentally introduced to the United States through ballast water, which is water from other places that is dumped into another body of water to aid in stabilizing a ship. The aquatic species are oftentimes trapped in these ballast waters and are released with them into new and unknown environments. This can lead to rapid growth of the invasive species and can become an endangerment to other organisms that... ... middle of paper ... ...oil.htm Milfoil Control. (n.d.).
Since farming was initially used, people have tried to discover ways to prevent this. Dating back to the Sumerians 4500 years ago, people first tried to prevent pests by using chemicals to either kill or affect the pests (Unsworth). Up until the 1940’s, primarily inorganic and organic pesticides were used on crops, until synthetic pesticides were created (Unsworth). Synthetic pesticides are different from organic because they are changed by man to have different properties, such as lasting longer or having a better effect on pests. Since they are created by man, synthetic pesticides are usually far more dangerous than organic pesticides and cannot be broken d... ... middle of paper ... ...dously costly.
Natural deserts, swamps and salt marshes need to be preserved to protect biodiversity and the integrity of the Earth’s ecology. Introducing genetically engineered organisms into the environment means that these areas could be invaded by these new species therefore furthering loss of natural ecosystems. A major concern of farmers and scientists regarding engineered crops is that they are afraid that these new plants which would be resistant to herbicides and other chemicals would breed with a nearby weedy relative and thus creating a superweed that would be resistant to herbicide... ... middle of paper ... ...use serious allergic reactions, and bacteria genetically engineered to produce large amounts of the food supplement, tryptophan, have been suspected to produce toxic contaminants that killed 37 people and permanently disabled 1,500 more. Genetically Engineered foods will also lead to and increase in pollution of food and water supply. More than 50% of the crops developed by biotechnology companies have been engineered to be resistant to herbicides.