利用五大湖鳄龟检测湿地污染程度
文章来源:未知 文章作者:enread 发布时间:2016-06-10 08:21 字体: [ ]  进入论坛
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Decades of unregulated industrial waste dumping in areas of the Great Lakes have created a host of environmental and wildlife problems. Now it appears that Lake Michigan painted and snapping turtles could be a useful source for measuring the resulting pollution. Researchers from the laboratory of Gary Lamberti, professor of biological sciences and director of the Stream and Wetland Ecology Laboratory at the University of Notre Dame1, were working on a federal Great Lakes Restoration Initiative project to assess, enhance and restore Great Lakes coastal2 wetlands, when undergraduate researcher Dayna Smith suggesting checking for contaminants in turtles that were incidentally captured in fish nets. The project, funded by the U.S. Environmental Protection Agency, involves a large consortium of universities and agencies in the Great Lakes area, including Notre Dame, collaborating3 in a 10-year monitoring program. The program involves assessing water quality, plants, invertebrates4, fish, birds and amphibians5, but not reptiles6.
 
Smith, Lamberti, graduate student Matthew Cooper and research technician Jessica Kosiara found that painted turtles, which can live up to 20 years, and snapping turtles, which live up to 50 years and are harvested for food, were common inhabitants of these wetlands. They analyzed7 the muscle, liver, shell and claws of captured turtles in four wetland locations for cadmium, chromium, copper8, iron, lead, magnesium9, manganese and zinc10. The researchers discovered that all turtle individuals carried all eight metals, and that concentrations broadly correlated with assessments11 of metals in the soil of the wetlands. They also found that tests on small samples of shell and claw yielded results similar to those on muscle and liver, meaning that the tests can be performed without killing12 the turtles. Because the turtles live longer than fish and are relatively13 high on the food chain, they could be a useful source for measuring wetland pollution. Along with being sentinels for pollutants14, snapping turtles that are consumed by humans may also pose a health risk to those individuals similar to the health advisories15 placed on large Great Lakes fish.


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1 dame dvGzR0     
n.女士
参考例句:
  • The dame tell of her experience as a wife and mother.这位年长妇女讲了她作妻子和母亲的经验。
  • If you stick around,you'll have to marry that dame.如果再逗留多一会,你就要跟那个夫人结婚。
2 coastal WWiyh     
adj.海岸的,沿海的,沿岸的
参考例句:
  • The ocean waves are slowly eating away the coastal rocks.大海的波浪慢慢地侵蚀着岸边的岩石。
  • This country will fortify the coastal areas.该国将加强沿海地区的防御。
3 collaborating bd93aed5558c4b146fa553d822f7c432     
合作( collaborate的现在分词 ); 勾结叛国
参考例句:
  • Joe is collaborating on the work with a friend. 乔正与一位朋友合作做那件工作。
  • He was not only learning from but also collaborating with Joseph Thomson. 他不仅是在跟约瑟福?汤姆逊学习,而且也是在和他合作。
4 invertebrates 7e45dc289993d00de9b9f14a70e51319     
n.无脊椎动物( invertebrate的名词复数 )
参考例句:
  • Insects and worms are all invertebrates. 昆虫和蠕虫都是无脊椎动物。 来自辞典例句
  • In the earthworm and many other invertebrates, these excretory structures are called nephridia. 在蚯蚓和许多其它无脊椎动物中,这些排泄结构称为肾管。 来自辞典例句
5 amphibians c4a317a734a700eb6f767bdc511c1588     
两栖动物( amphibian的名词复数 ); 水陆两用车; 水旱两生植物; 水陆两用飞行器
参考例句:
  • The skin of amphibians is permeable to water. 两栖动物的皮肤是透水的。
  • Two amphibians ferry them out over the sands. 两辆水陆两用车把他们渡过沙滩。
6 reptiles 45053265723f59bd84cf4af2b15def8e     
n.爬行动物,爬虫( reptile的名词复数 )
参考例句:
  • Snakes and crocodiles are both reptiles. 蛇和鳄鱼都是爬行动物。 来自《简明英汉词典》
  • Birds, reptiles and insects come from eggs. 鸟类、爬虫及昆虫是卵生的。 来自《现代汉英综合大词典》
7 analyzed 483f1acae53789fbee273a644fdcda80     
v.分析( analyze的过去式和过去分词 );分解;解释;对…进行心理分析
参考例句:
  • The doctors analyzed the blood sample for anemia. 医生们分析了贫血的血样。 来自《简明英汉词典》
  • The young man did not analyze the process of his captivation and enrapturement, for love to him was a mystery and could not be analyzed. 这年轻人没有分析自己蛊惑著迷的过程,因为对他来说,爱是个不可分析的迷。 来自《简明英汉词典》
8 copper HZXyU     
n.铜;铜币;铜器;adj.铜(制)的;(紫)铜色的
参考例句:
  • The students are asked to prove the purity of copper.要求学生们检验铜的纯度。
  • Copper is a good medium for the conduction of heat and electricity.铜是热和电的良导体。
9 magnesium bRiz8     
n.镁
参考例句:
  • Magnesium is the nutrient element in plant growth.镁是植物生长的营养要素。
  • The water contains high amounts of magnesium.这水含有大量的镁。
10 zinc DfxwX     
n.锌;vt.在...上镀锌
参考例句:
  • Brass is formed by the fusion of copper and zinc.黄铜是通过铜和锌的熔合而成的。
  • Zinc is used to protect other metals from corrosion.锌被用来保护其他金属不受腐蚀。
11 assessments 7d0657785d6e5832f8576c61c78262ef     
n.评估( assessment的名词复数 );评价;(应偿付金额的)估定;(为征税对财产所作的)估价
参考例句:
  • He was shrewd in his personal assessments. 他总能对人作出精明的评价。 来自《简明英汉词典》
  • Surveys show about two-thirds use such assessments, while half employ personality tests. 调查表明,约有三分之二的公司采用了这种测评;而一半的公司则采用工作人员个人品质测试。 来自百科语句
12 killing kpBziQ     
n.巨额利润;突然赚大钱,发大财
参考例句:
  • Investors are set to make a killing from the sell-off.投资者准备清仓以便大赚一笔。
  • Last week my brother made a killing on Wall Street.上个周我兄弟在华尔街赚了一大笔。
13 relatively bkqzS3     
adv.比较...地,相对地
参考例句:
  • The rabbit is a relatively recent introduction in Australia.兔子是相对较新引入澳大利亚的物种。
  • The operation was relatively painless.手术相对来说不痛。
14 pollutants 694861490fe64672170a0da250a277c7     
污染物质(尤指工业废物)( pollutant的名词复数 )
参考例句:
  • Pollutants are constantly being released into the atmosphere. 污染物质正在不断地被排放到大气中去。
  • The 1987 Amendments limit 301(g) discharges to a few well-studied nonconventional pollutants. 1987年的修正案把第301条(g)的普通排放限制施加在一些认真研究过的几种非常规污染物上。 来自英汉非文学 - 环境法 - 环境法
15 advisories 838d8e512dfe9504dd8a0f42397c9482     
n.(有关进展、动向、建议等的)报告( advisory的名词复数 );公告;通告;通报
参考例句:
  • Compliance with Practice Advisories is optional. 是否遵守实务公告由审计师自行选择决定。 来自互联网
  • Hardened-PHP: not as such a PHP security information website, but it does have security advisories. 增强PHP:不仅仅是一个PHP安全新的网站,它还提供安全建议。 来自互联网
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