水熊虫生命力真的那么强吗?

微博看到了关于水熊一些介绍。。说它是地球上几乎杀不死的生物。。。百度了一下。。看到了如下的资料。。

它们的生命力超强,能在冷冻、水煮、风干的状态下存活,甚至……它还能在真空中或者放射性射线下存活。
具体实验如下:冷冻:-200摄氏度之下存活若干天,-272摄氏度之下存活2分钟。
高温:181度高温下存活2分钟。
放射能:在5700格雷强度的放射线下存活良好。(1格雷放射线相当于5000台胸透仪的放射强度,10~20格雷强度的放射线就能轻易杀死人类或者地球上大部分的动物)
风干:完全风干十年后,泡点水马上活过来。
真空:在真空中依然能存活下来。
压力:可以经受住600兆帕斯的压力,最深的马尼亚纳海沟水压的6倍也无法把它压扁。
处在PH值为1的强酸以及PH值13的强碱下,水熊照样没事,人类则是被溶化连骨头都没剩下来。
可在微波炉活上非常长的时间,人类在相同强度的微波下,不到1分钟就会被烤熟了

这是真的吗?如果是真的话为什么这么厉害呢?求专家解释吖。。。。

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23个答案
37 0

三蝶纪昆虫生态学硕士

2012-06-18 00:42


漏了一个“虫”字吧 水熊虫
熊虫 是缓步动物门Tardigrada动物的统称
因行动非常缓慢 多数脚上有爪 像熊而得名
最早是日本文献用了“熊虫”这个名称
中国文献沿用了这个称呼

熊虫生活在落叶层、苔藓和土壤中 有些生活在浅海海底
有独特的休眠现象 又称为隐生现象
是缓步动物用作抵御不良的环境 (例如缺氧、低温、极干燥)等
可以将身体的水份大幅降低 可从85%的水分锐减到3%
身体蜷缩成桶状 背侧的甲片叠在一起 弹性角质层收缩
但当环境好转时,身体又可以再复苏过来

熊虫体型很小很小很小 只有0.2-0.3毫米 极少数有1毫米
虽然生命力很强
但也没有那么神奇。。。
海水熊虫寿命也就3-4个月
淡水的1-2年 苔藓的2-4年
分类学研究取标本一般是用沸酒精处死后用霍氏液(水合氯醛100克、阿拉伯胶15克、甘油10毫升、蒸馏水25毫升)固定在玻片上观察
说明也不是那么不容易杀死的了。。
对强酸溶解那条表示怀疑 几丁质的外壳是可以被强酸溶解的

而且这玩意对人没什么害处
个体又超小 生命力顽强什么的也由它去了吧

31 1

CZT普通理工科生

2012-06-18 00:03

硬要说的话,就是它把这么多年时间进化获得的点数全点在生存天赋上了……

3 0
支持者: linwish o_- 傅里叶假面

以下是@鬼谷藏龙http://www.guokr.com/question/547482/ 的回答:

这个动物一般叫做水熊虫,泛指缓步动物门(Tardigrata),异缓步纲(Heterotardigrada)的一大类生物。你所给的图是来自FOX节目,《Cosmos, A Space Time Odyssey》的一段3D模拟图,图中描绘的这种水熊虫可能是Hypsibius dujardini
水熊虫确实可能使目前已知的动物中生存能力最强的类群,不过你的这段描述还是有些问题,一个是水熊虫分布很广,不只存在于深海中,基本上世界上任何潮湿的环境中都存在(不然也太对不起最强生存力的称号了),比如你图中的这个其实就是模拟一个水熊虫在苔藓表面的露水中游泳的姿态(原片里有描述)。

缓步动物门具有全部四种隐生(Cryptobiosis)性(即低湿隐生Anhydrobiosis、低温隐生(Cryobiosis)、变渗隐生(Osmobiosis)及缺氧隐生(Anoxybiosis)),能够在恶劣环境下停止所有新陈代谢。缓步动物也因此被认为是生命力最强的动物。在隐生的情况下,一般可以在高温(151 °C)、接近绝对零度(-272.8 °C)、高辐射真空或高压的环境下生存数分钟至数日不等。曾经有缓步动物隐生超过120年的记录。

(以上摘自维基百科)
水熊虫的承受真空、辐射、毒素、高温、干燥、极端pH等的抗性点数确实点得很高,但是并不是说它可以在这样的环境中也照样像图中这样悠然自得地生活,而是进入一种几乎没有任何生命体征且高度失水的隐生状态,这种休眠状态可以持续很久,当然,并不是说水熊虫凭借这个技能就可以在任何环境中高枕无忧了,一旦环境胁迫接触,实际上只有一部分水熊虫可以及时从休眠状态中恢复,但是这货偏偏繁殖能力也很强,所以一旦环境恢复,很快就可以恢复到原来的数量水平。

2 0

花盆君电子电气工程

2012-06-19 10:02
支持者: Hggy Silence_001

不要信百度,还有,不要信中文XD
好吧我武断了,不过一般来说这种东西你去看英文就会发现不但介绍得比中文详细,而且数量级也比中文低了很多。
另外我始终觉得存活和隐生是两回事

2 0

farfromthesunEngineering student

2014-03-21 12:25
支持者: Chemiholic 蒋氏者
处在PH值为1的强酸以及PH值13的强碱下,水熊照样没事,人类则是被溶化连骨头都没剩下来

胃酸pH值为1-2。

1 0
支持者: o_-

http://www.guokr.com/question/233592/
水熊,也叫水熊虫,相当于Q版海洋毛毛虫。它只有半毫米长,生活在地球上最恶劣的深海环境里。在2008年的一次实验中,研究者发现水熊虫甚至能经受太空里极度严寒和真空的考验,“小强”的称号蟑螂应该主动禅位给它。


1 0
支持者: lycii

熊虫生活在落叶层、苔藓和土壤中 有些生活在浅海海底
有独特的休眠现象 又称为隐生现象
是缓步动物用作抵御不良的环境 (例如缺氧、低温、极干燥)等
可以将身体的水份大幅降低 可从85%的水分锐减到3%
身体蜷缩成桶状 背侧的甲片叠在一起 弹性角质层收缩
但当环境好转时,身体又可以再复苏过来


看来大刘写的三体人是有依据的吖~

1 0

谁取了Freak请还我通信工程、DIY制作兼天文爱好者

2014-03-21 16:46
支持者: ming68

可以风干?!我们找到入侵的三体人了吗?!

1 1
支持者: 石头Ben

是真的哦,也算是水熊(缓步动物)的特殊进化能力吧,极强的极端环境适应能力。它们主要依靠在碰上极端环境通过隐生的方式降低甚至完全停止自身新陈代谢来存活。

0 0

我记得最近的新发现有过个专题 貌似是真的 打不死的小强以后可以换成杀不死的水熊了~

0 0

它无法承受突然变化的环境,需要一点时间进入隐生状态,而且真空中存活率也不高,不是无敌的

0 0

Tardigrades (also known as waterbears or moss piglets)[2][3] are water-dwelling, segmented micro-animals, with eight legs.[2] They were first described by the German pastor J.A.E. Goeze in 1773. The name Tardigrada (meaning "slow stepper") was given three years later by the Italian biologist Lazzaro Spallanzani.[4]
Tardigrades are classified as extremophiles, organisms that can thrive in a physically or geochemically extreme condition that would be detrimental to most life on Earth.[5][6] For example, tardigrades can withstand temperatures from just above absolute zero to well above the boiling point of water, pressures about six times stronger than pressures found in the deepest ocean trenches, ionizing radiation at doses hundreds of times higher than the lethal dose for a human, and the vacuum of outer space. They can go without food or water for more than 10 years, drying out to the point where they are 3% or less water, only to rehydrate, forage, and reproduce.[7][8][9]
Usually, tardigrades are about 0.5 mm (0.020 in) long when they are fully grown.[2] They are short and plump with four pairs of legs, each with four to eight claws also known as "disks".[2] The animals are prevalent in mosses and lichens and feed on plant cells, algae, and small invertebrates. When collected, they may be viewed under a very-low-power microscope, making them accessible to students and amateur scientists.[10]
Tardigrades form the phylum Tardigrada, part of the superphylum Ecdysozoa. It is an ancient group, with fossils dating from 530 million years ago, in the Cambrian period.[11] The first tardigrades were discovered by Johann August Ephraim Goeze in 1773. Since 1778, over 1,150 tardigrade species have been identified.


Physiology[url=http://en.wikipedia.org/w/index.php?title=Tardigrade&action=edit&section=5]edit[/url]

Scientists have reported tardigrades in hot springs, on top of the Himalayas, under layers of solid ice, and in ocean sediments. Many species can be found in milder environments such as lakes, ponds, and meadows, while others can be found in stone walls and roofs. Tardigrades are most common in moist environments, but can stay active wherever they can retain at least some moisture.


Hypsibius dujardini imaged with ascanning electron microscope
Tardigrades are one of the few groups of species that are capable of reversibly suspending their metabolism and going into a state of cryptobiosis. Several species regularly survive in a dehydrated state for nearly 10 years. Depending on the environment, they may enter this state via anhydrobiosis, cryobiosis, osmobiosis, or anoxybiosis. While in this state, their metabolism lowers to less than 0.01% of normal and their water content can drop to 1% of normal. Their ability to remain desiccated for such a long period is largely dependent on the high levels of the nonreducing sugar trehalose, which protects their membranes. In this cryptobiotic state, the tardigrade is known as a tun.[24]
Tardigrades are able to survive in extreme environments that would kill almost any other animal. The following are extremes states tardigrades can survive:

  • Temperature – tardigrades can survive being heated for a few minutes to 151 °C (304 °F),[25] or being chilled for days at −200 °C (-328 °F),.[25] Some can even survive cooling to −272 °C (~1 degree above absolute zero or -458 °F)[26] for a few minutes.
  • Pressure – they can withstand the extremely low pressure of a vacuum and also very high pressures, more than 1,200 times atmospheric pressure. Tardigrades can survive the vacuum of open space and solar radiation combined for at least 10 days.[27] Some species can also withstand pressure of 6,000 atmospheres, which is nearly six times the pressure of water in the deepest ocean trench, theMariana trench.
  • Dehydration – the longest that living tardigrades have been shown to survive in a dry state is nearly 10 years,[9][28] although there is one report of a leg movement, not generally considered "survival",[29] in a 120-year-old specimen from dried moss.[30] When exposed to extremely low temperatures, their body composition goes from 85% water to only 3%. As water expands upon freezing, dehydration ensures the tardigrades do not get ripped apart by the freezing ice.
  • Radiation – tardigrades can withstand 1,000 times more radiation than other animals,[32] median lethal doses of 5,000 Gy (of gamma rays) and 6,200 Gy (of heavy ions) in hydrated animals (5 to 10 Gy could be fatal to a human).[33] The only explanation found in earlier experiments for this ability was that their lowered water state provides fewer reactants for the ionizing radiation.[34] However, subsequent research found that tardigrades, when hydrated, still remain highly resistant to shortwave UV radiation in comparison to other animals, and that one factor for this is their ability to efficiently repair damage to their DNA resulting from that exposure.

Irradiation of tardigrade eggs collected directly from a natural substrate (moss) showed a clear dose-related response, with a steep decline in hatchability at doses up to 4 kGy above which no eggs hatched.[36] The eggs were more tolerant to radiation late in development. No eggs irradiated at the early developmental stage hatched, and only one egg at middle stage hatched, while eggs irradiated in the late stage hatched at a rate indistinguishable from controls.[36]

  • Environmental toxins – tardigrades can undergo chemobiosis, a cryptobiotic response to high levels of environmental toxins. However, as of 2001, these laboratory results have yet to be verified.
  • Outer space – tardigrades are the first known animal to survive in space. On September 2007, dehydrated tardigrades were taken into low Earth orbit on the FOTON-M3 mission carrying the BIOPAN astrobiology payload. For 10 days, groups of tardigrades were exposed to the hard vacuum of outer space, or vacuum and solar UV radiation.[37][38] After being rehydrated back on Earth, over 68% of the subjects protected from high-energy UV radiation revived within 30 minutes following rehydration, but subsequent mortality was high; many of these produced viable embryos.[27][39] In contrast, dehydrated samples exposed to the combined effect of vacuum and full solar UV radiation had significantly reduced survival, with only three subjects of Milnesium tardigradum surviving.[27] In May 2011, Italian scientists sent tardigrades into space along with other extremophiles on STS-134, the final flight of Space Shuttle Endeavour.[40][41][42]Their conclusion was that microgravity and cosmic radiation "did not significantly affect survival of tardigrades in flight, confirming that tardigrades represent a useful animal for space research."[43] In November 2011, they were among the organisms to be sent by the US-based Planetary Society on the Russian Fobos-Grunt mission's Living Interplanetary Flight Experiment to Phobos; however, the launch failed.

Evolutionary relationships and history[url=http://en.wikipedia.org/w/index.php?title=Tardigrade&action=edit&section=6]edit[/url]


2 2
支持者: trier Human_being--_--

明显就是三体人入侵了

0 0

物理927物理/动漫控 Sherlock大爱 腐

2012-11-24 20:12

这货简直就是把进化过程中所有属性点都给HP加成了……

0 0

如果可以吃的话就解决粮食危机了,这货应该也不会灭绝吧。

0 0

这货是高HP。高魔抗高护甲啊。。

0 0

它生存能力这么强,抗压力这么大,那么以水熊虫为食的微生物算是怎么回事?它们嚼也嚼不碎,吞进肚子里也消化不了?

0 0

那是外星人留在地球的摄像头...你们这帮愚蠢的地球人

0 1

其实,我们中国人生命力也是很顽强的

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