HOME >> BIOLOGY >> NEWS
50 Arctic lakes show dramatic effects of climate warming

Dramatic clues to North American climate change have been discovered by a team of Queen's University scientists in the bottom of 50 Arctic lakes.

Using innovative techniques that enable them to collect historic evidence from fossilized algae in lake bottom sediment, the researchers have found signs of marked environmental changes in a variety of lakes of different depths and composition, within a 750-km region bordering the northern tree-line. The changes are a signal of things to come in the rest of North America, say the Queen's paleolimnologists.

"We're seeing a significant, regional change in the ecology of these lakes over the past two centuries that is consistent with warmer conditions," says Dr. John Smol, Canada Research Chair in Environmental Change and co-head of the university's Paleoecological Environmental Assessment and Research Laboratory (PEARL). Dr. Smol conducted the study with Dr. Kathleen Rhland and student Alisha Priesnitz of Queen's Biology Department.

"Because the Arctic is a very vulnerable environment and usually the first area of the continent to show signs of environmental change often to the greatest degree it's considered a bellwether of what will happen elsewhere," says Dr. Rhland. "These are important signals that all of us should be heeding: the lakes' sedimentary records have tracked marked and directional ecosystem changes."

The Queen's study will be published this month in the international journal Arctic, Antarctic, and Alpine Research.

To reconstruct past environmental trends, the team used fossil markers (tiny algal cells) preserved in lake sediment. Sediment cores were collected by helicopter from the 50 lakes, in an area from Yellowknife, NWT, in the Boreal forest area towards the Bering Sea in the Arctic tundra. For each lake, they compared fossilized algae preserved in the top, most recent sediment layer with those from the bottom, pre-industrial layer dating back about 200 years.
'"/>

Contact: Nancy Dorrance
dorrance@post.queensu.ca
613-533-2869
Queen's University
8-Apr-2003


Page: 1 2 3

Related biology news :

1. Alaska scientists find Arctic tundra yields surprising carbon loss
2. Melting ice cap gives urgency to new census of marine life project in Arctic Ocean
3. Common chemicals morphing into potential toxins in Arctic
4. Researchers publish Circumpolar Arctic Vegetation Map
5. Research shows little effect from Arctic offshore oil drilling
6. New study begins to unravel fate of toxic pollutants harbored in Arctic waters
7. 54th Annual Arctic Science Conference highlights extreme events
8. UAF Institute of Arctic Biology researcher featured in Science
9. NSF to support study of environmental warming in the Arctic
10. Healy researchers make a series of striking discoveries about Arctic Ocean
11. University of Cincinnati researchers track climate changes in Arctic thaw lakes

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:3/22/2017)... 21, 2017   Neurotechnology , a provider ... today announced the release of the SentiVeillance ... improved facial recognition using up to 10 surveillance, ... computer. The new version uses deep neural-network-based facial ... it utilizes a Graphing Processing Unit (GPU) for ...
(Date:3/22/2017)... March 21, 2017 Vigilant Solutions , ... law enforcement agencies, announced today the appointment of retired ... of public safety business development. Mr. Sheridan ... experience, including a focus on the aviation transportation sector, ... recent position, Mr. Sheridan served as the Aviation Liaison ...
(Date:3/20/2017)... Pa. , March 20, 2017 PMD ... 2.0 personal spirometer and Wellness Management System (WMS), a ... Founded in 2010, PMD Healthcare is a Medical ... with a mission dedicated to creating innovative solutions that ... life. With that intent focus, PMD developed the first ...
Breaking Biology News(10 mins):
(Date:5/16/2017)... ... 16, 2017 , ... Zansors has secured a patent ... or EKG) acquisition and monitoring device. This Zansors’ next-generation intellectual property (IP), will ... the skin, making them significantly easier to deploy and use. , Currently, ECG ...
(Date:5/15/2017)... ... May 15, 2017 , ... Tunnell Consulting announced that ... “The Key Role of Specifications in Process Validation,” at the Process Validation Summit ... will bring together leaders from the pharmaceutical and biotech industries to explore processes, strategies ...
(Date:5/12/2017)... , May 12, 2017 GreenMark Biomedical Inc. ... at the 36th annual Michigan Growth Capital Symposium (MGCS) ... Delaware corporation with facilities in ... investors in attendance, including more than 100 top venture ... to society through biobased targeting technologies. GreenMark ...
(Date:5/11/2017)... ... ... The key to unlocking the cause of Multiple Sclerosis may lie in ... that can rob people of their ability to see, speak, and walk. It is ... a genetic tendency towards the disease combined with an unidentified environmental trigger. The genetics ...
Breaking Biology Technology:
Cached News: