• slider image
  • slider image
  • slider image
:::

人氣:332
scimonth - 最新研究 | 2017-07-18 | 人氣:332
格陵蘭的冰山已被汙染

    格陵蘭冰山(The Greenland ice sheet )經常被視為一個原始的環境,但新的研究表明,可能不是這樣。 科學家們研究了冰山中發現存在微生物與全球排放的污染物,如汞,鉛,多環芳烴(PAHs) 和多氯聯苯(PCB) 。

A Danish-led study, published today in the journal Environmental Research Letters, examined how microbes from the ice sheet have the potential to resist and degrade globally-emitted contaminants such as mercury, lead, PAH and PCB.

Dr Aviaja Hauptmann, from the University of Greenland, led the research. She said: "Globally emitted contaminants accumulate in the Arctic and are stored in the frozen environments of the cryosphere, essentially meaning they have become reservoirs of toxic chemicals.

"Our understanding of how biological processes interact with contamination in the Arctic is limited, which is why we hope our study represents a large step forward in the understanding and solving of this problem."

The researchers took samples from multiple surface ice locations on the Greenland ice sheet, which they analysed using metagenomic data and binned genomes. Their results show that the microbial communities found in the ice sheets have the potential to resist and degrade contaminants.

Dr Hauptmann said: "The microbial potential to degrade anthropogenic contaminants, including polychlorinated biphenyls (PCB), polycyclic aromatic hydrocarbons (PAHs), and the heavy metals mercury and lead, was found to be widespread, and not limited to regions close to human activities."

They also found that binned, or grouped, genomes showed close resemblance to microorganisms isolated from contaminated habitats. Since the genetic potential of contaminant resistance and degradation usually indicates the presence of the relevant contaminants, their results indicate that, from a microbiological perspective, the Greenland ice sheet is not a pristine environment.

Dr Hauptmann added: "More attention needs to be paid to the potential release of anthropogenic contaminants in this fast-changing environment. As the ice sheets melt due to climate change, they have the potential not only to increase sea level, but also pollute the environment around them through the release of other anthropogenic pollutants that have accumulated in them."



原文網站:" style="color:#005ca8;text-decoration-line:none">ScienceDaily

原文連結:IOP Publishing. "Greenland ice sheet toxicity. " ScienceDaily, 10 July, 2017.

參考文獻:Aviaja L Hauptmann et al., Contamination of the Arctic reflected in microbial metagenomes from the Greenland ice sheet. Environmental Research Letters, 2017. DOI: 10.1088/1748-9326/aa7445



 
網友個人意見,不代表本站立場,對於發言內容,由發表者自負責任。
發表者 樹狀展開
發表評論
評論規則*
任何人都可以發表評論
標題*
姓名*
信箱*
網站*
內容*
確認碼*
先以 26 減去 19 再乘以 8 是多少 ?  
輸入運算式的結果
您最多可以嘗試:10 次


合 作 與 贊 助 夥 伴

科技部 科技大觀園 國立教育廣播電台 國立自然科學博物館 生技醫藥國家型科技計畫 CASE PRESS RNAiCORE Connectome RNAiCORE

 

:::
快 速 登 入
使用Facebook登入 使用Google登入
會 員 登 入
搜尋
徵求計畫
新聞載入中,請稍後...
生命科學研究發展司

點此進入 生命科學研究發展司 網頁

臺灣大學科學教育發展中心

點此進入 臺灣大學科學教育發展中心 網頁

銘傳生科

點此進入 銘傳生科 網頁

海大海研所

點此進入 海大海研所 網頁

環球生技月刊

點此進入 環球生技月刊 網頁

研之有物

點此進入 研之有物 網頁

線 上 使 用 者
4人線上 (2人在瀏覽最新消息)

會員: 0
訪客: 4

更多…
流 量
今天: 2
昨天: 180180180
本週: 773773773
本月: 3652365236523652
總計: 658729658729658729658729658729658729
平均: 417417417