气候变化影响冷血动物生存-凯发k8官网

气候变化影响冷血动物生存
文章来源:未知 文章作者:enread 发布时间:2014-12-10 05:34 字体: [ ] 
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animals that regulate their body temperature through the external environment may be resilient to some climate change but not keep pace with rapid change, leading to potentially 1 outcomes for biodiversity. a study by the university of sydney and university of queensland showed many animals can modify the function of their cells and organs to 2 for changes in the climate and have done so in the past, but the researchers warn that the current rate of climate change will outpace animals' capacity for compensation (or acclimation).
 
the research has just been published in nature climate change (letters), written by professor frank seebacher school of biological sciences and professor craig franklin and associate professor craig white from the university of queensland.
 
adapting to climate change will not just require animals to cope with higher temperatures. the predicted increase to 3 in temperature as well as to overall temperature would require animals to function across a broader range of conditions. this is particularly important for ectotherms, animals that rely on external sources of heat to control body temperature, and are therefore more influenced by environmental temperatures.
 
the research showed that many groups of ectotherms, which make up more than 90 percent of all animals, are able to change their 4 function to cope with an altered environment, but the rapid pace and fluctuations of human-induced climate change present serious challenges.
 
the researchers studied 40 years of published data to assess how biological functions change in response to a sudden fluctuations in environmental temperatures. they found that the physiological rates of ectothermic animals, such as heart rate, 5 and 6, had already increased over the past 20 years with increasing average temperatures.
 
"it is important that animals maintain the right balance between the large number of physiological functions despite environmental fluctuations. an increase in temperature that leads to changed reaction rates can upset that balance and cause the decline of individuals and species," said professor seebacher. "for example, movement requires energy and oxygen to be delivered to muscles. however, if metabolism or the cardiovascular system can't cope with increased temperatures, animals can no longer move to 7, migrate or interact with each other.
 
"the overall trend in the last 20 years has been to increased physiological rates, and we predict that this would continue to increase with increasing temperature. "even if animals are able to maintain the balance of their physiological functions in a warmer climate, increased metabolism leads to increases in the food resources needed and could upset the balance in 8, particularly if 9 and 10 populations respond very differently to the environmental temperature change."


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1 2ujx0     
adj.灾难性的,造成灾害的;极坏的,很糟的
参考例句:
  • the heavy rainstorm caused a disastrous flood.暴雨成灾。
  • her investment had disastrous consequences.she lost everything she owned.她的投资结果很惨,血本无归。
2 axky7     
vt.补偿,赔偿;酬报 vi.弥补;补偿;抵消
参考例句:
  • she used her good looks to compensate her lack of intelligence. 她利用她漂亮的外表来弥补智力的不足。
  • nothing can compensate for the loss of one's health. 一个人失去了键康是不可弥补的。
3 5ffd9bfff797526ec241b97cfb872d61     
波动,涨落,起伏( fluctuation的名词复数 )
参考例句:
  • he showed the price fluctuations in a statistical table. 他用统计表显示价格的波动。
  • there were so many unpredictable fluctuations on the stock exchange. 股票市场瞬息万变。
4 aavyk     
adj.生理学的,生理学上的
参考例句:
  • he bought a physiological book.他买了一本生理学方面的书。
  • every individual has a physiological requirement for each nutrient.每个人对每种营养成分都有一种生理上的需要。
5 171zc     
n.新陈代谢
参考例句:
  • after years of dieting,carol's metabolism was completely out of whack.经过数年的节食,卡罗尔的新陈代谢完全紊乱了。
  • all living matter undergoes a process of metabolism.生物都有新陈代谢。
6 48vzm     
n.运动,移动
参考例句:
  • by land,air or sea,birds are masters of locomotion.无论是通过陆地,飞越空中还是穿过海洋,鸟应算是运动能手了。
  • food sources also elicit oriented locomotion and recognition behavior patterns in most insects.食物源也引诱大多数昆虫定向迁移和识别行为。
7 qgyzp     
n.(牛马的)饲料,粮草;v.搜寻,翻寻
参考例句:
  • they were forced to forage for clothing and fuel.他们不得不去寻找衣服和燃料。
  • now the nutritive value of the forage is reduced.此时牧草的营养价值也下降了。
8 94cb0e40a815bea1157ac8aab9a5380d     
n.生态系统( ecosystem的名词复数 )
参考例句:
  • there are highly sensitive and delicately balanced ecosystems in the forest. 森林里有高度敏感、灵敏平衡的各种生态系统。 来自《简明英汉词典》
  • madagascar's ecosystems range from rainforest to semi-desert. 马达加斯加生态系统类型多样,从雨林到半荒漠等不一而足。 来自辞典例句
9 11vza     
n.捕食其它动物的动物;捕食者
参考例句:
  • the final part of this chapter was devoted to a brief summary of predator species.本章最后部分简要总结了食肉动物。
  • komodo dragon is the largest living lizard and a fearsome predator.科摩多龙是目前存在的最大蜥蜴,它是一种令人恐惧的捕食性动物。
10 g1czh     
n.被掠食者,牺牲者,掠食;v.捕食,掠夺,折磨
参考例句:
  • stronger animals prey on weaker ones.弱肉强食。
  • the lion was hunting for its prey.狮子在寻找猎物。
tag标签: animals climate change
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