Ecosystem Essay Example

Ecosystem Essay Example Ecosystem Essay Ecosystem Essay There are various reasons Of over-breed. The first one would be global effect, it is one of the main concern for the problem of over-breeding. Global warming changes the climate. Those are tolerant enough to survive can survive and increase the population; those who are not will decrease in number. This leads to the extinction of species. The lower atrophic level will increase in population size. Secondly, untreated pollution such as sewage and industrial discharge are toxic materials. When they leak to the environment, it will cause the same result as the global warming. Thirdly, Species are imported to a new place where they do not have predator and can adapted to the environment will have increase in the number of population. Fourthly, human abandon animals without concern would leads to the problem of over-breeding. Over-breeding will interfere the ecosystem. For the environment, the over, breed species might damage the plants, destroy the shelter and breakdown food chain. In the living organisms, species in the same ecosystem might change their usual prey, decrease the initial resources, aboriginal living organisms might disappear and be edged out from the original habitat. Finally, biodiversity will be lost. The variability among living organisms from all sources including terrestrial, marine, other aquatic ecosystems, and the ecological complexes of which they are part; this includes diversity within species, between species and of ecosystem. Species are hardly to recover after disturbances such as bush fires or volcanic eruption. Example Chinese mitten crab Chinese mitten crab (Ricochet genesis/-X%N) is Medium-sized burrowing crab which is native to the coastal estuaries Of eastern Asia. In 1 9005, the crab seeds from Shanghai Wesson were carried by European merchant ships, entered the sump with water. When merchant ships arrived Rhine and Thames in Germany, crab seeds and water were pulled out of the ship. Then the mitten crab adjusted Europe rivers swiftly. The rivers provided a good living environment for the Chinese mitten crabs. The warm water contained lots of nutrition which could speed up crabs breeding. Because of Chinese mitten crabs were from China, theres no local predictor can harm crabs, which also cause the over-breeding of Chinese mitten crab. There are 3 main consequences to the ecosystem after the crab numbers increase. The crabs would undermine dams. Chinese mitten crabs over Germany There are lots of consequences which are unavoidable when the number of Chinese mitten crabs increased. The crabs will undermine the nearby dams. As the dams are harmed, flooding will be caused, the whole area will be covered by water. Then the trees are drowned by water, because plants can not live without the air. A broken dam may also damage the sewage facilities, break down the tools. The polluted water will mix with the flash water, which will cause the water pollution. Besides, the crab is able the excavate holes on river bank to build crab shelter. As the holes become more and larger, it will cell the subsidence. In the other way, crabs will become new consumer in the river. Crabs usually eat fish and prawn as food. It will cause the monopoly of small size fish and prawn because of the growing number of the crabs. Crabs will pie the original food chain and then upset the whole river ecosystem. Mile-a-minute Weed Mile-a-minute Weed is a tropical plant in the Assistance from South America . It has several strong survival abilities allow them to become an over-breeding specie-let is a vigorously growing perennial creeper which single stalk can reduce between 20 and 40 thousand seeds a season. Its light seed can spread widely by wind. We can find this specie in the sub-tropical zones of North, Central, and South America. Mile-a-minute Weed is also highly adaptable to the undesirable environment as it can still grow well in less fertile soil. We have first found the Mile-a-minute Weed in 1884 in Hong Kong and believed that it would be transported by human through luggage or logistic into Hong Kong illegally . Due to the favorable conditions of Hong Kong ( high humidity, light and soil fertility) and its strong survival abilities, Mile-a-minute Weed becomes an over-breeding specie in Hong Kong which causing serious ecological destruction to the ecosystem of Hong Kong . Due to the rapid growing (as fast as 80 to 90 mm in 24 hours for a young plant) of Mile-a-minute Weed, it can cover other plants, shrubs and even trees in large scale with short period of time . The covered plants cannot absorbed enough sunlight for Photosynthesis and they would die eventually. It would also attach to other plants in order to absorb nutrients from them . When all the nutrients were lost, the plants then wither and die. Feasibility and limitation of eating The feasibility of encouraging eating over breeding species is limited by some reasons. There may be no natural enemy (helper) of over-breeding species to consume them and fail to reduce their population such as Chinese mitten crab and Mile-a-minute Weed. Absence of higher atrophic level of species allows over-breeding species grow rapidly without disturbance from eating. For human, they would not eat food that are distasteful and contain no nutrient. Different countries have different eating habit and culture. For example, western people seldom eat seafood (fish or crab). Chinese mitten Arab is over-breeding specie in Germany and the selling price would be very low , however German would not want to eat the crab. Pet overpopulation is a tragic problem but we wont eat pet because of ethics concern. As dog and cat are humans friends, eating pet violates our social ethic and it is so cruel and inhuman. So there are several reasons for us to refuse eating the over- breeding species as best solution . Introducing of their natural enemies increases the population of invasive alien species as new over-breeding species which may lead to a vicious circle , bad consequences to local ecology are resulted. The growing population of the foreign natural enemies would hunt on the over-breeding specie ,but also the local native species ,compete natural resources and habitats with the local species and may introduce pathogen or parasite that sicken or degrade habitats of native species. The explosion of alien predator causes the extinction of local species,thus imbalance in the ecological biodiversity. Serious disturbances of the food chain upset the whole ecosystem. We have found the example of Asian Carps invasion of North America. The local government introduced Asian Carp from China to South America in order to control the excessive phytoplankton and microbial in the ponds in 30 years ago. This kind offish occupies the main river drainage system of America(97% offish is Asian Carp in the Mississippi River at North America),then consume most of local species in the river and further make potential threat to the ecology and the food chain of Great Lakes. Solution We suggested 3 main solution to solve the over-breeding issue, which are: Education Transaction Sterile action Citizens have to be educated that never release any animal to the wild environment because the animals might adjust the new living environment easily and sire swiftly. Then the over-breeding problem will happen. Using the rabbit disaster in Austria in asses as an example, a field owner released 24 rabbits to the wild. Then the rabbits lived on grass land without any predator, they reproduced fast. Which caused native plants, animals and soil collapsed. Transaction is to transfer species to an unfamiliar region. Introduce animals to place with new environment which have different humidity, temperature and etc. The species might be arduous to adjust new environment, and the breeding rate can be reduced. For example, if a specie is used to live in tropic rest, when they are placed to a dry hot area, male sperm amount will be decreased. Sterilization is to remove the function of reproduction. There are two main methods to do the Sterilization, Chemical castration and Physical castration. Chemical castration is using chemicals to castrate the animals. Wild monkeys in Hong Kong are neutered by AFC since 2007. Males were sterilized by chemical vasectomy. Females were injected with an neoconservatives vaccine. Physical castration is using Surgery to castrate. Dogs and cats undergo surgery every years. Males were Testicle removal. Female were uterus and ovaries removal. Conclusion Eating is the only one of the solutions but not the best among all of them.