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the first stage is the introduction of exotic species, settlement and establish populations; the second stage is the proliferation of exotic species and outbreaks.  say,scarpe hogan uomo, invasive alien species and the threat of environmental damage to ecosystems is long lasting, it is often very difficult to control or clear. Through early detection and management of priority measures to prevent the establishment of alien species populations.
carp,http://www.gdzxzx.net/forum.php?mod=viewthread&tid=125966&fromuid=14572, silver carp,louboutin, bighead carp, fish,http://www.jsdctel.com/forum.php?mod=viewthread&tid=277893&fromuid=38728, carp and other fish. Li Xiuqi that because of the carp, carp many varieties, is likely to have a box releasing carp in these activities,giuseppe zanotti, the mirror carp from entering the Yellow River. In addition,hollister outlet, one of the sources in the upstream reservoir cage culture of fish escape,air jordan france, and the Yellow River estuary area is alien aquatic organisms. The reporter found that civil secretly released, ornamental aquatic discard has become alien aquatic species into the one of the main channels of the Yellow River natural waters. Participants in these release events, often do not understand the released species and aquatic ecosystems of the case. "In the past the family kept a red-eared, crayfish, was not willing to keep on looking for a place of release,abercrombie and fitch pas cher,http://forum.longquanzs.org/forum.php?mod=forumdisplay&fid=259&mod=spacecp&ac=blog&blogid=, also do not know the place where they are going." That may affect the ecological balance.
growth and reproduction of turtles provides a lot of habitat space. By many people as a pet red-eared hardy, miscellaneous eating habits,felpe hollister, eat big,http://wap.txhjly.com/forum.php?mod=viewthread&tid=116&fromuid=71, fast growth,louboutin shoes, strong reproductive capacity, it is one of the most dangerous invasive species IUCN published 100 kinds. Snapping turtles origin North America and Central America, with more meat and strong and famous, since the ability to reproduce amazing and extremely aggressive waters are called "eco-killer." According to Dr. Freshwater Fisheries Research Institute in Shandong Province  introduction into the waters of the Yellow exotic fish and amphibians and reptiles, with the local indigenous species compete for food resources and living space, with indigenous fish fishery germplasm hybridization mix causes degradation, predation so that the number of native species of indigenous fish reduce or even extinction, causing the already fragile aquatic ecosystems Yellow imbalance, even to the middle and lower reaches of the Yellow River impact economic and social development. Unsolicited or human causes Unauthorized release become alien aquatic species into the Yellow River main channel Yellow River and estuary areas appear alien aquatic species, in the end is coming on the middle reaches of the alluvial, or natural growth, and or caused by man? Some people think that may be a result of the proliferation of releasing. As effective practices commonly used at home and abroad, proliferation and stocking has become an important means to strengthen the conservation of living aquatic resources, but also conducive to the restoration of fish resources and maintain water biodiversity and promoting sustainable development of fishery production. In recent years,christian louboutin paris,http://www.universalflowuniversity.com/uinfodesk/?qa=15137&qa_1=boutique-louboutin-paris-hit-his-father-after-the-incident, along the Yellow River provinces, autonomous regions and the fishing sector in the upper reaches of the Yellow River fishery resources to carry out large-scale reproduction and releasing activities involving the Yellow River carp species.
the people of Jinan Bo surprised. Some respondents expressed the fishermen, has repeatedly saw release of a variety of alien aquatic species in Yellow River. "Some in groups,louboutin pas cher, specifically bought a variety of fish from the market,http://www.nicebro.fr/index.php?file=Guestbook,scarpe hogan outlet, most people are not those things which distinguish the Yellow River already there." In fact, more than the Yellow River and estuary areas, many parts of the country have encountered the problem of alien species are frequent. According to statistics,http://tl36v.cc/home.php?mod=space&uid=1275,air jordan pas cher homme, China's has 529 kinds of invasive alien species. In the World Conservation Union (IUCN) announced the world's 100 kinds of alien species in the most threatening,giuseppe zanotti pas cher, has 51 species invade China. Throughout the invasion of alien species and the number of cases,http://bbs.youtui.mobi/home.php?mod=space&uid=19472, the human factor can be found in almost behind. For example,christian louboutin, native to South America, water hyacinth, originally introduced by domestic as livestock feed.
also used as ornamental plants and water purification to promote the final results flooded. Another example is the red-eared, could be seen almost all of the domestic pet market its trace, in some places,louboutin pas cher, red-eared ecological environment has caused some threat. Alien species that threaten ecosystems Security The first line of defense is to prevent the establishment of invasive pest populations Since 1999 the implementation of the Yellow River water regulation,hollister paris, and in 2002 the Xiaolangdi Reservoir since the opening of the Yellow River downstream aquatic organisms ecological base flow is guaranteed,hollister soldes, aquatic basin biological resources and the trend of ecological deterioration curbed river ecosystem health has been effectively improved. However, the emergence of alien aquatic species will undoubtedly aggravate the already very fragile,louboutin heels, critically endangered indigenous fish of the Yellow River aquatic ecosystems risk. If the next part of the formation of natural populations of the species in the Yellow River aquatic ecosystems possible losses will be difficult to assess. However, the "alien species" to be turned into "invasive species", generally require a fairly lengthy process. Academia generally considered: the invasion of alien species through the process in two stages.