Navigation Links
Industrial contaminants spread by seabirds in High Arctic, new Canadian study shows

Seabirds are the surprising culprits in delivering pollutants ?through their guano ?to seemingly pristine northern ecosystems, a new Canadian study shows.

The most common form of wildlife in the Arctic, seabirds are responsible for transporting most of the human-made contaminants to some coastal ecosystems, the researchers found. "The effect is to elevate concentrations of pollutants such as mercury and DDT to as much as 60 times that of areas not influenced by seabird populations," says team member John Smol, a biology professor at Queen's University and Canada Research Chair in Environmental Change.

The multidisciplinary study, led by Dr. Jules Blais, professor of environmental toxicology at the University of Ottawa, will be published July 15 in the journal Science.

Other team members are Marianne Douglas from the University of Toronto, D.McMahon and Linda Kimpe from the University of Ottawa, Bronwyn Keatley from Queen's University, and Mark Mallory from the Canadian Wildlife Service (Iqaluit).

Calling it a "boomerang" effect, Dr Blais says: "These contaminants had been washed into the ocean, where we generally assumed they were no longer affecting terrestrial ecosystems. Our study shows that sea birds, which feed in the ocean but then come back to land, are returning not only with food for their young but with contaminants as well. The contaminants accumulate in their bodies and are released on land."

The study took place at Cape Vera on northern Devon Island in the Canadian High Arctic, far from industrial and agricultural sources of pollutants. However, chemicals are emitted into the air and oceans from the populated parts of the globe, and are transported by air and ocean currents toward cold areas like the Arctic.

"Some chemicals will build up in the food webs that comprise northern traditional diets," says Ms Kimpe. "As a result, some of our northern Canadian populations are among the most mercury and PCB-expose d people on the globe."

Dr. Mallory has led a team of researchers studying the Cape Vera colony of about 10,000 breeding pairs of birds called northern fulmars. The fulmars nest on the high cliffs, which are ringed by a series of freshwater ponds at their base. Although environmental monitoring in High Arctic locations is often very difficult due to logistical difficulties, lake sediments archive important information on environmental changes.

"Lakes slowly accumulate sediments, and incorporated in these sediments is an archive of past environmental changes, much like pages in a book," says Dr. Douglas, the Canada Research Chair in Global Change. The team analyzed contaminants from the sediments of the shallow ponds that ringed the base of the cliffs, as monitors of past contaminant inputs.

Noting that Canada has the longest coastline in the world, and seabirds are typically the dominant wildlife found in these coastal ecosystems, Dr. Blais says: "Most of Canada's coastline is at our northern fringe, and northern aboriginal communities rely on these ecosystems as a source of nutrition, economic development, traditional customs, and culture.

"We now have evidence that seabirds can concentrate industrial contaminants in coastal areas to levels that can be affecting those ecosystems."


'"/>

Source:Queen's University


Related biology news :

1. A silent pandemic: Industrial chemicals are impairing the brain development of children worldwide
2. Bird brains shrink from exposure to contaminants
3. A new portable biosensor detects traces of contaminants in food more quickly and cheaply
4. Anti-bacterial additive widespread in U.S. waterways
5. HIV-1 spread through six transmission lines in the UK
6. Reservoirs may accelerate the spread of invasive aquatic species, researchers say
7. Undesirable expatriates: Preventing the spread of invasive animals
8. Nanobacteria in clouds could spread disease, scientists claim
9. Rabies spread speeds up
10. New understanding of cell movement may yield ways to brake cancers spread
11. VCU Massey Cancer Center study shows enzyme linked to spread of breast cancer cells
Post Your Comments:
*Name:
*Comment:
*Email:


(Date:5/20/2016)... MINNEAPOLIS , May 20, 2016  VoiceIt ... technology partnership with VoicePass. By working ... user experience.  Because VoiceIt and VoicePass take slightly ... two engines increases both security and usability. ... expressed excitement about this new partnership. ...
(Date:5/3/2016)... , May 3, 2016  Neurotechnology, a provider ... MegaMatcher Automated Biometric Identification System (ABIS) , ... multi-biometric projects. MegaMatcher ABIS can process multiple complex ... any combination of fingerprint, face or iris biometrics. ... SDK and MegaMatcher Accelerator , which ...
(Date:4/26/2016)... , April 27, 2016 ... "Global Multi-modal Biometrics Market 2016-2020"  report to their ... , The analysts forecast the global ... of 15.49% during the period 2016-2020.  ... of sectors such as the healthcare, BFSI, transportation, ...
Breaking Biology News(10 mins):
(Date:6/23/2016)... ... June 23, 2016 , ... ... announce the launch of their brand, UP4™ Probiotics, into Target stores nationwide. The ... is proud to add Target to its list of well-respected retailers. This list ...
(Date:6/23/2016)... SPRING, Md. , June 23, 2016 A ... collected from the crime scene to track the criminal down. ... and the U.S. Food and Drug Administration (FDA) uses DNA ... Sound far-fetched? It,s not. The ... genome sequencing to support investigations of foodborne illnesses. Put as ...
(Date:6/23/2016)... Prostate Cancer Foundation (PCF) is pleased to announce 24 new Young Investigator ... Members of the Class of 2016 were selected from a pool of 128 ... About the Class of 2016 PCF Young Investigators ... ... ...
(Date:6/23/2016)... ... June 23, 2016 , ... Supplyframe, the ... the Supplyframe Design Lab . Located in Pasadena, Calif., the Design Lab’s ... how hardware projects are designed, built and brought to market. , The Design ...
Breaking Biology Technology: