植物应对气候变化的能力被低估-凯发k8官网

植物应对气候变化的能力被低估
文章来源:未知 文章作者:enread 发布时间:2012-05-04 05:05 字体: [ ] 
(单词翻译:双击或拖选)

experiments may dramatically underestimate how plants will respond to climate change in the future. that's the conclusion of an analysis of 50 plant studies on four continents, published this week in an advance online issue of the journal nature, which found that shifts in the 1 of flowering and leafing in plants due to global warming appear to be much greater than estimated by warming experiments. "this suggests that predicted 2 changes -- including continuing advances in the start of spring across much of the globe -- may be far greater than current estimates based on data from experiments," said elizabeth wolkovich, an ecologist at the university of british columbia who led an interdisciplinary(各学科间的) team of scientists that conducted the study while she was a postdoctoral fellow at the university of california, san diego.

"these findings have extensive consequences for predictions of species diversity, ecosystem services and global models of future change," said elsa cleland, an assistant professor of biology at uc san diego and senior author of the study, which involved 22 institutions in canada, sweden, switzerland, the u.k. and the u.s. "long-term records appear to be 3 on a consistent average response to climate change, but future plant and ecosystem responses to warming may be much higher than 4 estimated from experimental data."

predicting plant responses to climate change has important consequences for human water supply, 5 of crops and the overall health of 6. shifts in the timing of annual plant events -- which biologists call "phenology" -- are some of the most consistent and visible responses to climate change.

long-term historical records show that many plant species have shifted their leafing and flowering earlier, in step with warming temperatures over recent decades. because historical records are not available in most locations and climate change may produce temperatures higher than previously recorded, however, ecologists often rely on experiments that warm small field plots to estimate plant responses to temperature and project future conditions.

with support from the national center for 7 analysis and synthesis, a research center funded by the national science foundation, the state of california and the university of california, santa barbara, the scientists created new global databases of plant phenology(物候学) to compare the sensitivity of plants to temperature -- that is, how much plants shift their timing of leafing and flowering with warming. these were calculated from experiments and then compared to long-term monitoring records.



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1 rguzgc     
n.时间安排,时间选择
参考例句:
  • the timing of the meeting is not convenient.会议的时间安排不合适。
  • the timing of our statement is very opportune.我们发表声明选择的时机很恰当。
2 wq4xz     
n.生态系统
参考例句:
  • this destroyed the ecosystem of the island.这样破坏了岛上的生态系统。
  • we all have an interest in maintaining the integrity of the ecosystem.维持生态系统的完整是我们共同的利益。
3 23823b9401b4f5d440f61879a369ae50     
adj.收敛[缩]的,会聚的,趋同的v.(线条、运动的物体等)会于一点( converge的现在分词 );(趋于)相似或相同;人或车辆汇集;聚集
参考例句:
  • plants had gradually evolved along diverging and converging pathways. 植物是沿着趋异和趋同两种途径逐渐演化的。 来自辞典例句
  • this very slowly converging series was known to leibniz in 1674. 这个收敛很慢的级数是莱布尼茨在1674年得到的。 来自辞典例句
4 bkzzzc     
adv.以前,先前(地)
参考例句:
  • the bicycle tyre blew out at a previously damaged point.自行车胎在以前损坏过的地方又爆开了。
  • let me digress for a moment and explain what had happened previously.让我岔开一会儿,解释原先发生了什么。
5 fogxh     
n.授粉
参考例句:
  • the flowers get pollination by insects.这些花通过昆虫授粉。
  • without sufficient pollination,the growth of the corn is stunted.没有得到充足的授粉,谷物的长势就会受阻。
6 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
7 irrxx     
adj.生态的,生态学的
参考例句:
  • the region has been declared an ecological disaster zone.这个地区已经宣布为生态灾难区。
  • each animal has its ecological niche.每种动物都有自己的生态位.
tag标签: plants climate change
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