The Effects Of Foreign Species Introduction On An Ecosystem :: essays research papers

The Effects of Foreign Species Introduction On An Ecosystem   Ã‚  Ã‚  Ã‚  Ã‚  The effects of foreign species introduction into an ecosystem are very profound. From small microorganisms to species of large mammals, many foreign species introductions occur every day. New implications of their introduction are found just as often.   Ã‚  Ã‚  Ã‚  Ã‚  When a foreign species is introduced into an ecosystem, often the ecosystem contains no natural predators for the new species. This lack of predators sometimes leads to; in conjunction with a supply of food suitable for the new species, a period of exponential growth of the species. This growth and severe increase in the size of the population can cause a shortage of food for native species. When this occurs, the native species disappear and the biodiversity in the ecosystem is reduced. The carrying capacity is also reduced because the ecosystem will not be capable of supporting the same amount of life. If one species hogs the food and does not contribute itself to the food chain, the balance is disrupted and there will be less available for the native species. Once the new species has found its ecological niche however, balance begins to restore itself.   Ã‚  Ã‚  Ã‚  Ã‚  When the biodiversity in the ecosystem is reduced, the ability of the ecosystem to grow, or the biotic potential, is as well reduced. More species residing in an ecosystem which depend on each other allows for a greater chance of survival and perpetuation. This may occur for several reasons, for example a bee and a flower. The bee requires the pollen of the flower to make its honey. However, while gathering the pollen from the flowers, it transfers some of the pollen to female flowers, allowing them to make seeds and spawn further generations. However, a foreign species may, for example, eat the bees therefore allowing for decreased fecundity of the flowers.   Ã‚  Ã‚  Ã‚  Ã‚  Another implication of the introduction of foreign species into an ecosystem is the potential for toxins to be spread up the species chain is increased. For example, in ports all over the world, ships empty their ballast tanks containing large amounts of sea water, often laced with organisms not naturally found in their new region. The zebra mussel provides food for a certain type of fish, and also contains several toxins because it is a filter feeder. The level of toxins in the fish due to the biological amplification is high. But if and when a new type of fish are introduced, which eats zebra mussels and provides a more preferred food for the fish which formerly ate the mussels, a new level of biological amplification is inserted.

Business Unit 3 Constraints of Marketing

Constraints of marketing Legal aspects There are four legal aspects that can limit and constrain your marketing, these are the sales of goods act 1979, and this law means that all products must be ‘as described’ of ‘a reasonable quality’ and be suitable for everyday purpose and also any specific purpose agreed. E. g. a waterproof coat must be waterproof. Another legal aspect is the trade descriptions act this means that a product cannot be sold by misleading the buyer, in the way the product was made, what it is made of or where and when it was made.E. g. You cannot say something is handmade if it is not, and a hair dryer made for drying hair, must actually dry hair. The consumer credit act 2002 protects consumer’s rights when they buy goods on credit. Traders who offer credit must have an OFT (Office of Fair Trading) licence, this deals with the method of calculating APR (Annual Percentage Rate) the form and content of the agreement, and lenders guid elines. When lending money, businesses much have interest rates clearly stated and cannot change them after you have signed up.The Data Protection Act means that any information stored by marketers must only be used for the purpose stated when collected, it must be accurate and up to date, not kept longer than the period of time stated, and obtained fairly and lawfully. It must be kept up to date as if someone passes away you should not call asking for them. Also your information is protected from unauthorised use, and cannot be passed on to other companies without your permission. The information stored is available for your inspection and correction upon your request.Voluntary codes A voluntary constraint is when a company voluntary says they will never do something or they will always do something. This could include signing a code of practice stating certain behaviours ethically, even though it cannot be legally enforced. The ASA (Advertising Standards Authority) overlook advert isements in the UK and have been controlling non-broadcast ads for nearly 50 years. They say adverts must be decent, legal, honest, and truthful. The ads online are also subject to these rules.Most companies sign up to the ASA and then on follow their rules, if the rules are broken they are not breaking the law but the ASA will publicise this and show everyone what has happened and what they have done. 2397 ads were changed or withdrawn in 2009 by the ASA. E. g. The advert, for the Ford Ka's ‘Evil twin' featured a pigeon-bashing four wheeler that brought the wrath of animal rights activists across the country, meaning the advert never even made it to air in the UK. Pressure groups and consumerismPressure groups are groups of people who share the same interests in a business or product; these groups can persuade or force businesses to make changes to their products or services. E. g. cancer research focus on the particular smoking issue and attempt to reduce smoking. And Friend s of the Earth are a multiple cause group who seek to influence the decisions made concerning the environment. Greenpeace seek to promote environmental issues to its members and supporters. Marketing must include promotion to get people intrested. Consumerism is ‘a social movement seeking to augment the rights of buyers in relation to sellers’

Plato s View Of The City State - 993 Words

In â€Å"Plato Republic,† the view of Plato on achieving a true city with no injustice differs greatly from those of other philosophers. Although it is not conventional, the way that Plato creates a true city does work. By creating an entirely new city and adding guardians, Plato is effectively removing luxuries, thus removing the fever from the city. This is successfully transforming the city with a fever into a just and true city. In this paper, I will demonstrate that the methods that Plato exercises are effective and will create a true city-state. According to Plato, in the origin myth of the city-state, the rationale behind living in the city-state is that sharing with one another is more beneficial to individuals. This meaning that nobody is self-sufficient and that everybody needs the skills of someone else to survive. This is shown when Socrates says, â€Å"I think a city comes to be because none of us is self-sufficient, but we all need many things.†(Plato 369 b) Plato does not think that one person is able to be self-sufficient nor be a jack-of-all-trades. This is also true in the society we live in today. Dentists focus on providing health care, but give a dentist a gun to hunt for food, and chances are he will not be able to do it. Instead, Plato believes that everybody by nature is skilled to do one thing the best, meaning that somebody who is excellent at farming would make a bad doctor, and vice versa. With this theory in mind, that means that a farmer would depend onShow MoreRelatedPlato s Interpretation Of Utopia1630 Words   |  7 PagesPlato and Aristotle shared many differences despite also sharing a teacher student relationship. 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