大象与犀牛对雨林生物多样性有重要作用-凯发k8官网

大象与犀牛对雨林生物多样性有重要作用
文章来源:未知 文章作者:enread 发布时间:2012-05-14 06:20 字体: [ ] 
(单词翻译:双击或拖选)

the progressive 1 of seed-dispersing animals like elephants and 3(犀牛) puts the 4 integrity and biodiversity of the tropical forest of south-east asia at risk. with the help of spanish researchers, an international team of experts has confirmed that not even herbivores(食草动物) like tapirs can replace them. "megaherbivores act as the 'gardeners' of humid tropical forests: they are vital to forest regeneration and maintain its structure and biodiversity," as was explained by ahimsa campos-arceiz, the lead author of the study that was published in the 'biotropica' journal and researcher at the school of geography of the university of nottingham in malaysia.

in these forests in east asia, the large diversity of plant species means that there is not enough space for all the trees to 5(发芽,生长) and grow. as well as the scarce light, seed dispersion is made more complicated by the lack of wind due to the trees that are up to 90 metres high. plant life is then limited to seeds 6 by those animals that eat 7(纸浆,果肉) . they either 8 seeds by dropping their food, regurgitating it or by defecating later on.

in the case of large seeds, "plants need a large animal capable of eating, transporting and defecating the seeds in good conditions," as outlined by luis santamaría, co-author and researcher at the 9 institute for advanced studies (imedea) of spain's csic scientific research agency. this is where elephants and rhinoceroses come into play because they can scatter large quantities of seeds thanks to the fact that they slowly digest very little of their food.

however, habitat loss, poaching, and the conflict between elephant and man has caused a 95% loss in asian elephant (elephas maximus) historical distribution range and has left the 2 just a step away from 10: there are less than 50 java rhinoceroses (rhinoceros sondaicus) and 200 sumatra rhinoceroses (dicerorhinus sumatrensis).

according to the red list of the international union for conservation of nature (iucn), elephants are in 'danger of extinction' and the two rhinoceros species are 'critically endangered'.



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1 ouex5     
n.消失,消散,失踪
参考例句:
  • he was hard put to it to explain her disappearance.他难以说明她为什么不见了。
  • her disappearance gave rise to the wildest rumours.她失踪一事引起了各种流言蜚语。
2 txxxw     
n.犀牛
参考例句:
  • the rhinoceros has one horn on its nose.犀牛鼻子上有一个角。
  • the body of the rhinoceros likes a cattle and the head likes a triangle.犀牛的形体像牛,头呈三角形。
3 75b06ff1c3ad4bf5e454140a332dce7a     
n.钱,钞票( rhino的名词复数 );犀牛(=rhinoceros);犀牛( rhinoceros的名词复数 );脸皮和犀牛皮一样厚
参考例句:
  • rhinoceroses and dragons for once will let us walk in peace. 犀牛与龙安歇,让我们能平静地行走。 来自互联网
  • although the rhinoceroses are very heavy, they can run very fast. 犀牛虽然体型笨重,但仍能以相当快的速度行走或奔跑。 来自互联网
4 itxw5     
adj.构造的,组织的,建筑(用)的
参考例句:
  • the storm caused no structural damage.风暴没有造成建筑结构方面的破坏。
  • the north american continent is made up of three great structural entities.北美大陆是由三个构造单元组成的。
5 hgsx1     
v.发芽;发生;发展
参考例句:
  • seeds will not germinate without water.没有水,种子是不会发芽的。
  • can thin and hollow seeds germinate?瘦瘪的种子能够发芽吗?
6 b24c637ca8e58669bce3496236c839fa     
adj. 被驱散的, 被分散的, 散布的
参考例句:
  • the clouds dispersed themselves. 云散了。
  • after school the children dispersed to their homes. 放学后,孩子们四散回家了。
7 qt4y9     
n.果肉,纸浆;v.化成纸浆,除去...果肉,制成纸浆
参考例句:
  • the pulp of this watermelon is too spongy.这西瓜瓤儿太肉了。
  • the company manufactures pulp and paper products.这个公司制造纸浆和纸产品。
8 udwzt     
vt.撒,驱散,散开;散布/播;vi.分散,消散
参考例句:
  • you pile everything up and scatter things around.你把东西乱堆乱放。
  • small villages scatter at the foot of the mountain.村庄零零落落地散布在山脚下。
9 ezuzt     
adj.地中海的;地中海沿岸的
参考例句:
  • the houses are mediterranean in character.这些房子都属地中海风格。
  • gibraltar is the key to the mediterranean.直布罗陀是地中海的要冲。
10 spwzp     
n.熄灭,消亡,消灭,灭绝,绝种
参考例句:
  • the plant is now in danger of extinction.这种植物现在有绝种的危险。
  • the island's way of life is doomed to extinction.这个岛上的生活方式注定要消失。
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