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:6/2/2016)... 2, 2016   The Weather Company , an IBM ... an industry-first capability in which consumers will be able to ... ask questions via voice or text and receive relevant information ... Marketers have long sought an advertising solution that ... be personal, relevant and valuable; and can scale across millions ...
(Date:5/20/2016)... 2016  VoiceIt is excited to announce its ... By working together, VoiceIt and VoicePass will ... VoicePass take slightly different approaches to voice biometrics, ... and usability. ... partnership. "This marketing and technology partnership ...
(Date:5/3/2016)... 2016  Neurotechnology, a provider of high-precision biometric ... Biometric Identification System (ABIS) , a complete system ... ABIS can process multiple complex biometric transactions with ... fingerprint, face or iris biometrics. It leverages the ... MegaMatcher Accelerator , which have been used ...
Breaking Biology News(10 mins):
(Date:6/23/2016)... 2016 Houston Methodist Willowbrook Hospital has ... Association to serve as their official health care ... Willowbrook will provide sponsorship support, athletic training services, ... coaches, volunteers, athletes and families. "We ... Association and to bring Houston Methodist quality services ...
(Date:6/23/2016)... --  EpiBiome , a precision microbiome engineering company, today ... from Silicon Valley Bank (SVB). The financing will allow ... drug development efforts, as well as purchase additional lab ... been an incredible strategic partner to us – one ... provide," said Dr. Aeron Tynes Hammack , EpiBiome,s ...
(Date:6/23/2016)... 2016 Apellis Pharmaceuticals, Inc. today announced ... of its complement C3 inhibitor, APL-2. The trials ... dose studies designed to assess the safety, tolerability, ... in healthy adult volunteers. Forty subjects ... single dose (ranging from 45 to 1,440mg) or ...
(Date:6/23/2016)... ... June 23, 2016 , ... ClinCapture, the only free validated ... will showcase its product’s latest features from June 26 to June 30, 2016 ... on Disrupting Clinical Trials in The Cloud during the conference. DIA (Drug ...
Breaking Biology Technology:
Cached News: