Biological pollution presents the globalized tendency

Biological pollution presents the globalized tendency
One kind is called withering the rattan plant which is done the chrysanthemum and invaded the southeast region following the line of the sea of our country without anyone or anything even noticing, lead to the fact the large stretch of trees die; In Kunming, a kind of South American hyclrophyte water hyacinth grows crazily, reduce the water area of Dian Chi greatly, local climate become, become more and more because of their drily, 68 kinds of fish in the lake have 38 kinds to pass out of existence. The relevant person of scientific and technological circle points out, this kind of phenomenon causing the original ecological disruption through harmful outside and biological invasion - -Biological pollution, is happening all the time. And with the constant extension of the global traffic, constant increase of non-governmental trade, frequency and range invaded are also expanding constantly, and there are globalized development trends. More worriedly, though the mankind has carried on 40 -year long research to biological pollution, but ecologists do not find the natural law of the course of biological pollution yet. First of all, to " invador " Know little about. Secondly, unable to predict to invading place, time. After a kind of outside living beings invade, can hide for decades, the change of the ecological balance can cause breaking out invasion. U.S.A. one expert think outside weeds invade 30 year or spread until after 4000 hectares finding usually. In addition, the extent of injury that we invade to the living beings is unable to estimate. Because the danger that the outside living beings invade not only replace the local species but also will produce a succession of consequences. In Montana of U.S.A., the wild animal protected personnel to introduce the chaff shrimp for the bait which increased the salmon, but the chaff shrimp has eaten up all planktonic organisms on reliance of salmon's fry, salmon's quantity dropped instead finally, and then cause the extinction of bears, animal who prays on bird and other reliance salmons. The introduction of a tiny chaff shrimp causes a lot of hawks to die of hunger and disappear from the sky. The danger of biological pollution is far from like this, this personage further points out, it has posed the enormous threat to equilibrium of the whole ecosystem, development of human society. In our country, the biological pollution issue has not caused people's great attention yet, the personage of scientific and technological circle is this appeal, should set about making relevant strategy as soon as possible, in order to resist outside biological invasion. The biological pollution of biological pollution means a certain harmful outside living beings invade and cause and have ecological destruction originally. It is different from chemical contamination, the outside living beings can proliferate and spread to the new place constantly, can also meet the new environment and occupy the advantage progressively, thus jeopardize the native species. It is an incident that people often regard harmful to these and outside and biological invasion as briefly, the understanding of its threat is not enough too. In Australia, one might come from the intersection of New Guinea and pathogenic fungi of district since invaded in 1920, have caused the forest of thousands of hectares to be destroyed. This kind of fungi is harmful to 3/4 of the plants, including tall and big varieties of trees and short and small bush. In New Zealand, one comes from kangaroo of the activity of night in Australia, estimate that can eat up the forest of local 21 tons every night. Recently, the U.S. government is setting about making a strategy, deals with the outside living beings in order to coordinate every federal organization. Some developed countries in western Europe are seeking the counter-measure actively too. These measures mainly include the following aspects: First, improve relevant international treaties such as the international plant protection convention,etc., reduce the loophole; Second, cut off the outside and biological invasion passway; Third, set up international living beings and control system and database, the ones that overcame and encroached on the species information are scattered; Fourth, finish administrator's introduction of the outside species of natural resources, such as feed plant comes, is used as the outside grass kind that the soil protects outside the pastoral area; Fifth, improve the whole ecological consciousness of population, make people understand the value of the local natural scenery, resist outside and biological invasion.

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