实验室中培养的珊瑚在野外成功繁殖-凯发k8官网

实验室中培养的珊瑚在野外成功繁殖
文章来源:未知 文章作者:enread 发布时间:2016-01-31 04:13 字体: [ ] 
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researchers of secore international (usa, germany), the university of amsterdam (netherlands) and the carmabi 1 research station (curaçao) have for the first time successfully raised laboratory-bred colonies of a threatened caribbean coral species to sexual 2. these findings have been published in the latest issue of the scientific journal bulletin of marine science. "in 2011, offspring of the critically endangered elkhorn coral (acropora palmata) were reared from gametes collected in the field and were outplanted to a reef one year later", explains valérie chamberland, coral reef ecologist working for secore and carmabi. "in four years, these branching corals have grown to a size of a soccer ball and reproduced, 3 with their natural population, in september 2015. this event marks the first ever successful rearing of a threatened caribbean coral species to its reproductive age." 
 
due to its large size and branching shape, elkhorn corals created vast forests in shallow reef waters that protect shores from incoming storms and provide a critical habitat for a 4 of other reef organisms, including ecologically and economically important fish species. an estimated 80% of all caribbean corals have disappeared over the last four decades and repopulating degraded reefs has since become a management priority throughout the caribbean region. the elkhorn coral was one of the species whose decline was so severe that it was one of the first coral species to be listed as threatened under the u.s. endangered species act in 2006, and as critically endangered under the iucn red list of threatened species in 2008. consequently, measures to aid caribbean reef recovery often focus on the elkhorn coral given its major decline and its 5 importance. 
 
since 2010, secore, carmabi, and partners from 6 around the world started a project aimed at developing techniques to rear larger numbers of elkhorn coral offspring so they could eventually be outplanted to degraded reefs throughout the caribbean. "our approach differs substantially from the one generally used by the large number of reef restoration groups that operate throughout the caribbean", explains dirk petersen, coral reef expert and director of secore. "these groups generally use the 'coral gardening' approach, where small fragments are harvested from coral colonies on the reef. the fragments are then grown in special nurseries to larger sizes before they are returned to the reef." although this method has been 7 throughout the caribbean, it does not allow for new 8 combinations as the fragments harbor the same 9 as the 10 colonies and are therefore copies of their parents. "by contrast, secore developed a technique whereby male and female gametes are caught in the wild and 11 in the laboratory to raise larger numbers of 12 unique corals", says dirk petersen.


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1 77izo     
adj.海的;海生的;航海的;海事的;n.水兵
参考例句:
  • marine creatures are those which live in the sea. 海洋生物是生存在海里的生物。
  • when the war broke out,he volunteered for the marine corps.战争爆发时,他自愿参加了海军陆战队。
2 47nzh     
n.成熟;完成;(支票、债券等)到期
参考例句:
  • these plants ought to reach maturity after five years.这些植物五年后就该长成了。
  • this is the period at which the body attains maturity.这是身体发育成熟的时期。
3 4ibz1o     
adv.同时发生地,同时进行地
参考例句:
  • the radar beam can track a number of targets almost simultaneously.雷达波几乎可以同时追着多个目标。
  • the windows allow a computer user to execute multiple programs simultaneously.windows允许计算机用户同时运行多个程序。
4 m67zu     
adj.无数的;n.无数,极大数量
参考例句:
  • they offered no solution for all our myriad problems.对于我们数不清的问题他们束手无策。
  • i had three weeks to make a myriad of arrangements.我花了三个星期做大量准备工作。
5 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.
6 82747d9c1d5a367d4d227b28ed8cf5c6     
n.养鱼缸,水族馆( aquarium的名词复数 )
参考例句:
  • biotope aquariums represent the natural environments of ornamental fish. 生态鱼缸表现出观赏鱼的自然生活环境。 来自互联网
  • there are aquariums in many cities in the world. 世界上好多城市有水族馆。 来自互联网
7 tz2zxa     
adj.应用的;v.应用,适用
参考例句:
  • she plans to take a course in applied linguistics.她打算学习应用语言学课程。
  • this cream is best applied to the face at night.这种乳霜最好晚上擦脸用。
8 pgixp     
adj.遗传的,遗传学的
参考例句:
  • it's very difficult to treat genetic diseases.遗传性疾病治疗起来很困难。
  • each daughter cell can receive a full complement of the genetic information.每个子细胞可以收到遗传信息的一个完全补偿物。
9 01914f8eac35d7e14afa065217edd8c0     
n.基因( gene的名词复数 )
参考例句:
  • you have good genes from your parents, so you should live a long time. 你从父母那儿获得优良的基因,所以能够活得很长。 来自《简明英汉词典》
  • differences will help to reveal the functions of the genes. 它们间的差异将会帮助我们揭开基因多种功能。 来自英汉非文学 - 生命科学 - 生物技术的世纪
10 dstxi     
n.捐献者;赠送人;(组织、器官等的)供体
参考例句:
  • in these cases,the recipient usually takes care of the donor afterwards.在这类情况下,接受捐献者以后通常会照顾捐赠者。
  • the doctor transplanted the donor's heart to mike's chest cavity.医生将捐赠者的心脏移植进麦克的胸腔。
11 0f66e269f3e72fa001554304e59712da     
v.施肥( fertilize的过去式和过去分词 )
参考例句:
  • the study of psychology has recently been widely cross-fertilized by new discoveries in genetics. 心理学研究最近从遗传学的新发现中受益匪浅。
  • flowers are often fertilized by bees as they gather nectar. 花常在蜜蜂采蜜时受粉。
12 lgixo     
adv.遗传上
参考例句:
  • all the bees in the colony are genetically related. 同一群体的蜜蜂都有亲缘关系。
  • genetically modified foods have already arrived on american dinner tables. 经基因改造加工过的食物已端上了美国人的餐桌。 来自英汉非文学 - 生命科学 - 基因与食物
tag标签: species coral reef
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