showing the character of harm

Basin will still go up?
2005 年 04 月 20 日
reporter Xu Baike
The pulchritude of birds singing, yet now merely the exception muffle. melodies of birds suddenly silent, the birds have given us this globe of color, beauty and fun are gone, these alterations came so rapidly and noiselessly hh - Rachel. Carson's Class of impair reasoned along stupidity, do no know,constantly apt their own knitting Qi Guizhi sweater, Field unconsciously come a piece of agricultural land, dozens of birds eating witch yellow pharynx in the fields of planters spattered rat poison, huddled attach blow, having seizures, and rapidly swallowed wind. macabre. ! , hordes of sparrows and predators eagle flying in the climate together.
This is also mysterious! GUO Shu quickly realize namely the highland basin beneath decisive what occurred hh
GUO Shu and sparrows infancy memories is accompanying. He lives in Nanchong in Sichuan and small partners will come up with a variety of cheats Laizhuo sparrows, and even sitting in the skylight class, but also outdoor the study-room from time to time glance by the open space on the shore of the basin, by the time the mallet snapped behind , the basin feeding the sparrows will be covering the visit. Of lesson, excavate a sparrow egg is also fun.
1977 年 GUO Shu admitted to West China Normal University (then Nanchong Teachers College) Department of Biology, and his memory, schools are circled even nowmland, could not say why. afterward scrutinized successively collected information, not equitable Nanchong, Sichuan Basin in the final century the late 70s early 80s there Sparrow populations have plummeted and even the disappearance of the phenomenon.
GUO Shu a friends, who half-jokingly nigh us zoology episode? For example, the sparrow where to go? gone are the rows of the practice station. Q. Where have you been, the respond went to Beijing. These people after the rumors, is a seemingly scientific speculation: universal warming, the sparrow from the Sichuan Basin to the tall top, high-latitude areas of low temperature migration.
other speculation: urban and rural construction of modern concrete tile to replace the traditional wooden cottages and thatched cottage, without the gaps in the walls tile because sparrow lairs, resulting in population decline and fade; population density constraints in the role, due to their growth and ebb.
1994 onwards, GUO Shu sparrow specialized investigation began. He and aides traveled about all the counties in Sichuan, according to random distribution areas identified by field observations, records sparrows come and go situation, will receive the file input geographic information systems. electronic map display, divided into the three areas of Sichuan Province,toronto asian escort, which accounted for 29.5% of the province of the east basin area is a rare area, sparrows Most towns and villages have disappeared many years, only in some larger, better green parks, schools, bureaus and remote villages there are few small populations. sparrow is rather unusual in the regional birds. < br> in the meantime studies have shown that some previous presumption that either migratory, nesting, said, or density that are not created. GUO Shu base that sparrows disappear with the Sichuan region developed, the more amplified agricultural areas overlap entirely, Sparrow also lost the time the late 70s of last century China in the early 80s ploughing pesticides seem entirely persistent conversion.
GUO Shu finally concluded: the disappearance of the sparrow is directly narrated with the use of pesticides.
70 of the last century annuals ago, the Sichuan countryside using a low toxicity, high-residual organochlorine pesticides (to DDT as the representative), use less. The enrichment of pesticides via the edible chain, showing the role of harm, for the high-end eco-cone has a serious biological clash, which would lead to corner promote the use of highly toxic organophosphate pesticide leftovers, which are particularly vulnerable to pesticides to kill the low end of the small cone in the ecology of birds. At the same time, the family compact duty system was introduced to farmers to increase production, the use of The potion and frequency of chemical pesticides doubled.
GUO Shu said: is against the damage of all chemical pesticides, rather than what a better question. We did not realize it, but simply to magistrate, oh, you say the pesticide is not good, I'll change a entity. Point out the words the essence of problems.
organophosphorus pesticides than the short-term risk of organochlorine pesticides although small, seems to retention the high-end eco-cone, but in truth undermine the root of this cone, ambition devastate the entire eco- system and accordingly more risky.
GUO Shu according apt understand, because of pesticide use in rice-producing districts is many higher than that of wheat, sorghum and additional crops producing areas, the phenomenon of the vanish of sparrows in the southern rice-producing areas of quite universal.
too is not just sparrows, GUO Shu Another study showed that, magpies, sparrows, and as such common birds adored by the people, is also facing a calamity. Sichuan magpie disappear disappearance of spatial and temporal delivery of time and space sparrow delivery is very alike to a large amplitude also due to the abuse of pesticides.
> , including numerous birds - green warbler finches, cardinals, song sparrow, as well as Jiaque hh hh hundreds of birds were all slew on my lifelong gamekeeper, this is truly a sorrowful thing. penetrated numerous periods. planting season, farmers use pesticides carbofuran, rodenticides and cooked sweet potatoes merged together, sprinkle the fields trapping sparrows, magpies, crows, gold wings and other birds, killing one presently .
since the highly noxious organophosphorus pesticides and tetramine maimed, 2000, the Sichuan Basin, the sparrow showing signs of retrieval emerged. He has again stressed that such retrieval is only . As for the Magpies, still do not see anyone signs of recovery.
care and long-term studies of birds, the GUO Shu-aware: very tenacious vitality! treat them a little morsel,beijing escort, it will survive.'d secluded his situation with the person a deeper hidden.