Navigation Links
North America's northernmost lake affected by global warming
Date:9/26/2007

Quebec City, September 26, 2007Analyses conducted by researchers from Universit Lavals Center for Northern Studies reveal that the continents northernmost lake is affected by climate change. In an article to be published in the September 28 edition of Geophysical Research Letters, the international research team led by Universit Laval scientists Warwick Vincent and Reinhard Pienitz reports that aquatic life in Ward Hunt Lake, a body of water located on a small island north of Ellesmere Island in the Canadian Arctic, has undergone major transformations within the last two centuries. The speed and range of these transformationsunprecedented in the lakes last 8,000 yearssuggest that climate change related to human activity could be at the source of this phenomenon.

The researchers conclusions are based on the analysis of a sediment core extracted in the center of Ward Hunt Lake in August 2003. This 18 centimeter long sediment core containing algae pigments and diatom remnants was used by the researchers as a biological archive in order to determine the diversity and abundance of aquatic life-forms in the lake over the last 8,450 years.

Analysis of the deepest layers of sediment revealed a very small number of algae as well as only minor variations in concentration. However, the top two centimeters of the core, which correspond to the last 200 years, showed abrupt changes in the lakes algae population: during that period, chlorophyll a concentration, a pigment found in every species in the lake, increased by a factor of 500. A type of diatom typical of very cold environments also made its first appearance during the same period. The absence of diatoms and the low pigment concentration below the top 2.5 centimeters of the core suggest that the lake was permanently frozen in the past, explains lead author and Center for Northern Studies researcher Dermot Antoniades.

Located on the 83rd parallel in the Quttinirpaaq (meaning top of the world
'/>"/>

Contact: Jean-Franois Hupp
jean-francois.huppe@dap.ulaval.ca
418-656-7785
Universit Laval
Source:Eurekalert

Page: 1 2

Related biology news :

1. Alaskan puzzles, monitoring provide insight about North Pacific salmon runs
2. No relief for Pacific Northwest drought
3. Survey finds silver contamination in North Pacific waters
4. First North American Encapsulated Islet Transplant without Long-term Immune Suppression into a Patient with Type 1 Diabetes
5. Habitat use by North Pacific right whales, Eubalaena japonica, in the Bering Sea and Gulf of Alaska
6. Red delicious, Northern Spy apples have most antioxidants, chemists find
7. FSU scientist warns North Atlantic right whale facing extinction
8. Drug resistant avian influenza viruses more common in Southeast Asia than North America
9. Proposal would allow wild animals to roam North America
10. North & South American researchers find architectural abnormalities in T. cruzi ribosome
11. Skin disease common among Hispanic farmworkers in North Carolina, research shows
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:9/18/2014)... it that when people are too stressed they are ... the Brain Mind Institute (BMI) at EPFL have just ... between chronic stress and the loss of social skills ... attacks a synaptic regulatory molecule in the brain. This ... Communications . , Carmen Sandi,s team went to ...
(Date:9/18/2014)... the ideal animal in which to study the genes ... into tens of thousands of freshwater streams and lakes ... adapt to the new environment. , Breeding studies between ... up one of the genes that controls tooth number, ... regulation in a freshwater population is associated with a ...
(Date:9/18/2014)... is probably the ultimate form of camouflage: you don,t ... this strategy is not as uncommon as you might ... County, USA, explains that the larval life stages of ... part of the anatomy that most creatures cannot make ... have to shield each individual eye unit with an ...
Breaking Biology News(10 mins):How stress tears us apart 2Counting fish teeth reveals regulatory DNA changes behind rapid evolution, adaptation 2Counting fish teeth reveals regulatory DNA changes behind rapid evolution, adaptation 3Transparent larvae hide opaque eyes behind reflections 2
... a new biological pathway-based computational model, called the Pathway-based ... between different diseases as reported in BioDataMining ... present in large publicly available disease datasets to find ... a visual form. "The PHPN offers a bird,s ...
... 11 million people suffer severe burns. The resulting large, deep ... lifelong scars. What is needed to reduce this kind of ... very limited area of skin can be removed from the ... Besides conventional skin grafting, another option is to engineer a ...
... to finding cures for heart disease scientists are working to ... a tissue model for the human heart that can bridge ... exist for other organs, but for the heart, this has ... embryonic stem cells with the resulting muscle having significant similarities ...
Cached Biology News:Dartmouth researchers develop new tool to identify genetic risk factors 2Blood and lymphatic capillaries grown for the first time in the lab 2Scientists develop an engineered cardiac tissue model to study the human heart 2
(Date:9/18/2014)... YARDLEY , Pennsylvanie, 18 septembre 2014 ... Lyon en 1974, a été ... à compléter les évaluations cliniques traditionnelles par ... Reported Outcomes) et sur les impacts économiques ... http://photos.prnewswire.com/prnh/20140618/119365 A cours ...
(Date:9/18/2014)... , Sept. 18, 2014   Sigma-Aldrich ... it has entered into a new gene editing ... School,s Vector Core. Under the partnership, Sigma-Aldrich will ... experimental design consultation, and dedicated gene editing bioinformaticians. ... gene editing-based research at the U-M Medical School. ...
(Date:9/18/2014)... September 18, 2014 OMICS Group ... globe to participate in the ‘Open Access Week’ ... to OMICS Group Pharma Journals from ... of the fastest emerging Sciences, accelerating with a ... services across the globe. The industry is gearing ...
(Date:9/18/2014)... MA (PRWEB) September 18, 2014 ... Molecule Sequencing (tSMS™) technology, announced today the closing ... of investment, led by Genomic Diagnostic Technologies, will ... and diagnostic applications. , Founded in March 2013 ... and Bioinformatics Analyst at Helicos BioSciences, SeqLL has ...
Breaking Biology Technology:1974 - 2014 - Mapi fête ses 40 ans 2Sigma-Aldrich, University of Michigan Medical School Establish CRISPR Core Lab Partnership 2Sigma-Aldrich, University of Michigan Medical School Establish CRISPR Core Lab Partnership 3Sigma-Aldrich, University of Michigan Medical School Establish CRISPR Core Lab Partnership 4Pharma and Omics Journals to Address Global Challenges during Open Access Week 2Pharma and Omics Journals to Address Global Challenges during Open Access Week 3SeqLL Closes Series-A Funding Round for Expansion of Single Molecule Sequencing 2
... ROMAINVILLE, France, March 13 ,Cellectis SA (NYSE: ... rational genome engineering,has announced today that it ... Inc. in the United States District Court ... lawsuit seeks a declaration that,by making and ...
... pm ET today, BEDMINSTER, N.J., March 13 ... reported 2007 financial results,and accomplishments that reflected the ... late-stage product candidates in specialty,indications for gastrointestinal and ... line with its new business plan, during 2007 ...
... IV Patent Challenge Underway -, CORONA, Calif., ... ), a leading specialty pharmaceutical,company, today confirmed that ... with the U.S. Food and Drug Administration (FDA) ... tablets, USP,(0.09 mg/0.02 mg) extended-cycle oral contraceptive product ...
Cached Biology Technology:Cellectis Sues Precision BioSciences for Infringement of its Patents Concerning Meganuclease Technology 2Cellectis Sues Precision BioSciences for Infringement of its Patents Concerning Meganuclease Technology 3Cellectis Sues Precision BioSciences for Infringement of its Patents Concerning Meganuclease Technology 4NPS Pharmaceuticals Reports 2007 Financial Results 2NPS Pharmaceuticals Reports 2007 Financial Results 3NPS Pharmaceuticals Reports 2007 Financial Results 4NPS Pharmaceuticals Reports 2007 Financial Results 5NPS Pharmaceuticals Reports 2007 Financial Results 6NPS Pharmaceuticals Reports 2007 Financial Results 7NPS Pharmaceuticals Reports 2007 Financial Results 8NPS Pharmaceuticals Reports 2007 Financial Results 9Watson Files FDA Application for Generic LYBREL(R) 2
... PCR Purification Kits provide rapid and efficient ... PCR products, and salts from PCR products ... provides two Binding Buffer options for ... can be performed in either single column ...
Mus musculus junctophilin 2 (Jph2) Antigen: Recombinant Protein...
... Cloning Kits for Sequencing allow 5-minute cloning and ... TOPO Cloning vectors with primer sites located as ... product insertion site. This minimizes the amount of ... reaching the sequence of your insert.vectors are available. ...
2.0 GHz Compaq Computer with 512 MB RAM, 32 MB AGP Graphics Card, 40 GB Hard Drive, 1 Serial Port & Open PCI Slot, Windows 2000 OS, MS Office, CD Read/Writer and 18 Flat Panel Monitor...
Biology Products: