HOME >> BIOLOGY >> NEWS
Strong impact of wintering waterbirds on zebra mussel populations at Lake Constance, Germany

The numbers of overwintering waterbirds at Lake Constance, a large lake on the borders of Germany, Austria and Switzerland, have increased fourfold since the early 1960s, with a daily average of 162 500 waterbirds from September to April as shown by a study published in the august issue of Freshwater Biology. This massive increase coincides with the major expansion of zebra mussels in the lake, originating in the Caspian-Aral basin, and a major pest in Europe and North America.

The main avian population changes concerned the mussel-eating tufted duck, pochard and coot; which currently make up some 80% of all wintering waterbirds at Lake Constance. Stefan Werner, Martin Mrtl and Karl-Otto Rothhaupt from the Limnological Institute at the University of Konstanz; and Hans-Gnther Bauer from the Max-Planck Institute for Ornithology in Radolfzell found that the diving ducks and coots deplete mussel populations by more than 90% in water as deep as 11 m each winter. Each bird consumes about 1.4 kg of mussels (fresh mass) per day. At one study site, a shallow lake at Konstanz, the birds removed a total of about 750 tons of mussels per km2 in the course of winter. It is apparent that wintering waterbirds exert a strong top-down effect on the littoral community, but the mussel stocks recover every summer during the absence of their main predators.


'"/>

Contact: Emily Davis
emily.davis@oxon.blackwellpublishing.com
Blackwell Publishing Ltd.
20-Jul-2005


Page: 1

Related biology news :

1. Stronger evidence found linking Epstein-Barr virus and risk of multiple sclerosis
2. Strongest proof yet found for prion hypothesis
3. Stronger therapy better for AML with normal genetics
4. 1 of deep oceans most turbulent areas has big impact on climate
5. Journal of Alzheimers Disease achieves significant impact factor
6. Journal of Nuclear Medicines impact grows, remains consistently high over past 5 years
7. Giant magnetocaloric materials could have large impact on the environment
8. Study could impact noninvasive treatment of cancer tumors
9. Yale journal examines the global impact of cities
10. Woods Hole Research Center scientists study impacts of industrial logging in Central Africa
11. Economic impact of hunger affects all Americans

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


(Date:11/15/2018)... ... November 14, 2018 , ... Persivia, a provider of ... that Prime Healthcare, a leading operator of over 50 hospitals nationwide, has selected ... Bundled Payment solution consists of the industry’s only end to end solution for ...
(Date:11/15/2018)... , ... November 14, 2018 , ... ... Jill Carnahan, MD, founder and medical director of Flatiron Functional Medicine to its ... the world, Dr. Carnahan will bring to uBiome extensive experience in treating the ...
(Date:11/14/2018)... ... ... In recognition of World Diabetes Day, Diopsys is lending its voice to ... reaching out to help educate patients and the healthcare community about the clinical and ... people with the disease. , The American Diabetes Association (ADA) released new research ...
Breaking Biology News(10 mins):
(Date:11/20/2018)... Ga. (PRWEB) , ... November 19, 2018 , ... Patients ... receive custom dental implants from Dr. Dan Myers at THE DENTIST Centers ... dental implant placement and restorations for the last 20 years. He now offers skilled ...
(Date:11/20/2018)... , ... November 20, 2018 , ... Dr. Steven White ... for gingivitis at their office in Cornelius, NC. This common infection, left untreated, can ... in practice, along with special training and certification in laser dentistry, Drs. White and ...
(Date:11/13/2018)... ... November 13, 2018 , ... Renowned Honolulu veterinarian, Dr. ... the island of Kauai. Dr. Leadbeater, of Kahala Pet Hospital on ... Recently, he began traveling to the island of Kauai on an almost weekly ...
(Date:11/13/2018)... ... November 12, 2018 , ... Dr. Dan Myers, a well-respected ... now welcomes new patients for MTM® Clear Aligners. Offering a variety of orthodontics ... in the Sandy Springs and Alpharetta areas. Constantly on the forefront of innovative ...
Breaking Biology Technology:
Cached News: