泉州塑料挤出机价格 征象变化惹的祸：白毛动物恐将灭

北狐、白鼬的身白毛格外娟秀，但这些白毛并不是为了好意思瞻念泉州塑料挤出机价格，而是为了融入环境、障翳敌东谈主的挫折。干系词，比年来由于征象变暖，冰雪覆盖期镌汰，本应和冰雪融为体的白毛反而在雪的暖冬变得格外眼，容易被捕食者发觉，白毛动物数目也因此急剧下跌。科学教会说，改日白毛动物可能会散失。

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White-furred animals are in danger of dying out because climate change is causing a fall in snow cover, leaving them exposed and vulnerable, a new study suggests.

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项新考虑指出，白毛动物正濒临灭的危急，因为征象变化致冰雪覆盖范畴减少，从而让白毛动物难以驻足、易受挫折。

Scientists in Poland have been following the worrying case of the white-coated weasel, which sheds its tawny covering in the winter for a milky coat allowing it to blend effortlessly into its icy environment.

波兰的科学们直在追踪访问白鼬这种令东谈主担忧的情景。白鼬在冬天会褪去黄褐的外相，长出雪白外相，以便纯粹地融入冰雪环境中。

But researchers have discovered that between 1997 and 27 the number of days with permanent snow cover in Białowieża Forest, Poland, halved, from 8 to 4.

关联词考虑东谈主员发现，1997年至27年间，波兰比亚沃维耶扎原始丛林被恒久冰雪覆盖的时分从8天镌汰到了4天。

It means that the little creatures are being caught out in a completely unsuitable environment, where they are easy prey for predators like foxes and crows.

这意味着这种小动物将和环境报怨比好意思，容易成为狐狸和乌鸦等捕食者的猎物。

The team at the Polish Academy of Sciences found that on days when there was little winter snow cover, the number of white-coated weasels they managed to capture fell to as low as 2 percent of the total, suggesting the rest had been killed.

波兰科学院的考虑团队发现，在冰雪覆盖范畴很小的日子里，他们能捕捉到的白鼬的数目下跌到了猎物总和的2，这意味着另外那部分白鼬齐已被死。

Previously they would have been dominant, because their coats would have given them a survival advantage.

先前拿获的猎物基本齐是白鼬，因为它们的白毛给我方带来了生计势。

The problem is likely to affect other white-furred mammals and birds living in areas vulnerable to climate change such as the Arctic fox as the snow cover increasingly gives way to a landscape of greens and browns.泉州塑料挤出机价格

在些容易受征象变化影响的地区，塑料管材设备那处的其他白毛哺乳动物和鸟类很可能也被这个问题困扰，比如北狐，因为越来越多本应被冰雪覆盖的地显现了绿草和黄地皮。

Scientists have recorded 21 mammal and bird species which turn white in the winter to hide themselves in snowy landscapes including the mountain hare, the Siberian hamster, the collared lemming, the white-tailed jackrabbit and the willow ptarmigan bird.

科学纪录了外相会在冬天变白以在冰天雪地里驻足的21种哺乳动物和鸟类，包括雪兔、西伯利亚仓鼠、环颈旅鼠、白尾长耳大野兔和柳雷鸟。

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Author Dr Karol Zub, told The Telegraph: “Definitely the same rules apply to all seasonally moulting mammals and birds.

考虑论述的作家卡罗尔·祖布博士告诉《逐日电讯报》说：“相似的律例细目适用于总计季节换毛的哺乳动物和鸟类。”

“According to studies on showshoe hares during periods when hares are colour mismatched weekly survival probability decreases by 3.3 - 6.5 percent. This seems not to be a big effect, but the cumulative effect over winter can seriously influence mortality of the species.

“凭据对白靴兔的考虑，当白靴兔的颜不可融入环境时，它们单周的生计几率下跌了3.3-6.5。这听起来似乎影响不大，关联词总计这个词冬天的蓄积应将会严重影响这类物种的生计。”

“It is very probable that in the near future white weasels and stoats will disappear completely from many areas of Northern Europe and North America.

“在不远的改日，北欧和北好意思很多地区的白鼬很可能将散失。”

"They will either be replaced by brown morphs or they will evolve and moult later in the season, being only partly white for a relatively short period.”

“它们要么被棕的变种鼬取代，要么进化成晚换毛、白毛期相对短的白鼬，况且在白毛期时，身上也只须部分白毛。”

Researchers also carried out tests using toys of brown and white-coated weasels to see if the colours were actually making a difference to predators.

考虑东谈主员还用黄鼬和白鼬玩物作念了测试，看颜是否对捕食者有影响。

When they set up camera traps they found dozens of animals, such as foxes, wolves and birds of prey had approached the white toys, but none had shown interest in the brown versions.

考虑东谈主员布好相机陷坑后，他们发现狐狸、狼和食肉鸟等数十种动物齐接近过白玩物，但莫得动物对棕玩物发扬出意思意思。

The authors say both findings suggest that the decrease in white-coated weasels is due to an increase in detection by predators in a less snowy environment.

作家称，这两项考虑齐标明，白鼬数目下跌缘于在冰雪覆盖减少的环境中捕食者容易发觉白鼬的存在。

The researchers are hopeful the animals will learn to adapt, but say they cannot rule out the animals vanishing entirely.

考虑东谈主员但愿白鼬能学会适应环境，但也指出不可排斥这种动物就此灭的可能。

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Weasels that do not change colour in the winter, are more likely to survive to pass on their brown-coated genes, increasing the numbers of the darker species.

那些在冬天不会变的鼬鼠可能生计下去，进而把褐毛基因传递给下代，致黄鼬数目增多。

Dr Zub added: “We should not underestimate the power of natural selection. We hope that along with future climate warming, autumn temperatures will also increase, providing an additional signal to the weasels to delay their moult.

祖布博士补充谈：“咱们不应低估当然遴荐的力量。咱们但愿在改日征象变暖的经过中，秋季气温也会随之升，大致向鼬鼠稀薄传递延伸换毛的信号。”

The research was published in the journal Scientific Reports.

该考虑发表在《科学论述》期刊上。

英文开头：逐日电讯报

翻译&裁剪：丹妮泉州塑料挤出机价格

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