Free Newsletters - Space - Defense - Environment - Energy - Solar - Nuclear
..
. Earth Science News .




WATER WORLD
Leisure boats threaten the Swedish West Coast archipelago
by Staff Writers
Gothenburg, Sweden (SPX) Oct 23, 2012


illustration only

The number of leisure boats along the Swedish West Coast has risen dramatically over the last 20 years, resulting in a risk that the inner archipelago might be destroyed. These are the findings of new research from the University of Gothenburg, Sweden.

In Sannas Fjord, a silled fjord to the north of Grebbestad in Bohuslan, researchers from the University of Gothenburg have studied the marine environment in the inner archipelago and built a treatment plant for flushing water from the washing of boats with painted hulls in connection with the autumn haul-out.

Researchers have also given courses to those bringing boats ashore and to the people responsible for ports and the environment in coastal municipalities.

There have been significant increases in both the number of leisure boats and in boat traffic in recent decades, with definite negative consequences for the environment.

There are currently around 25,000 berths in Northern Bohuslan alone. Researchers therefore believe that it is very important to slow down this trend significantly and to limit emissions from leisure boats in our most sensitive fjords and archipelagos.

"The toxic, anti-fouling hull paints on the boats release both heavy metals and toxic substances to prevent growth on the boats. Motor boats also emit large amounts of noxious hydrocarbons and acidifying substances into the water through their exhaust fumes, which have increased as boats have become greater in number and are fitted with more powerful engines that also consume more fuel," says Kjell Nordberg, who is Professor in the Department of Earth Sciences at the University of Gothenburg and is in charge of the project.

Fjords and protected inner archipelagos act as sedimentation basins or sediment traps, in which heavy metals and organic environmental toxins contaminate and accumulate with sediments on the sea floor in fjords and estuaries.

Problems with pollutants in our inner archipelagos and fjords are particularly widespread in Sweden compared with many other European countries, where strong tides bring in fresh, new bottom-water twice a day.

"It's a worrying trend bearing in mind that the number of boats is rising all the time, with increasingly powerful engines that consume more and more petrol. The situation at present is already very precarious," says Kjell Nordberg.

When marine geologist Kjell Nordberg examined various sediment samples in the Sannas Fjord in Tanum, he discovered not only high levels of polyaromatic hydrocarbons and heavy metals, but also a lack of oxygen in the beds during late summer and autumn in virtually the whole fjord, even in shallow waters.

"You could tell from the occasionally black sediments, laminations and bacterial mats that this has been going on since the 1990s. There's not much alive here in the summer," says Kjell Nordberg.

The lack of oxygen started back in the late 1980s, when there was a dramatic rise in leisure boat activity. This may have contributed to the fact that there are now virtually no demersal fish left in the inner archipelago.

"I don't think many boat owners are aware of the correlation between exhaust emissions and the environmental destruction of the sea. Just because people have more four-stroke engines nowadays, most of us boat owners think everything's OK, but that's not the case at all," says Kjell Nordberg.

Researchers are calling for new ways of owning boats, such as introducing boat pools and launching options based further out from the coast, so that not all boat owners begin their trips with a long, polluting journey through the inner archipelago.

Another possibility is to have boat hotels and storage locations on land where boats can be "parked" without any toxic anti-fouling hull paint when they are not in use.

.


Related Links
University of Gothenburg
Water News - Science, Technology and Politics






Comment on this article via your Facebook, Yahoo, AOL, Hotmail login.

Share this article via these popular social media networks
del.icio.usdel.icio.us DiggDigg RedditReddit GoogleGoogle




Memory Foam Mattress Review
Newsletters :: SpaceDaily :: SpaceWar :: TerraDaily :: Energy Daily
XML Feeds :: Space News :: Earth News :: War News :: Solar Energy News





WATER WORLD
Wave snatches Polish woman to her death in Spain
Barcelona (AFP) Oct 19, 2012
A huge wave dragged a Polish woman to her death as she walked on a Spanish beach with a friend on Friday in a storm that also left a young French man missing. As the powerful storm smashed into northeastern Catalonia, a big wave snatched away the 37-year-old Polish woman in the holiday resort of Lloret del Mar in the early hours, emergency services officials said. "She was walking along ... read more


WATER WORLD
Clinton hails Haitian post-quake reconstruction

Top Italy scientists resign in protest at quake ruling

Japan's radiation monitoring unreliable: Greenpeace

Japan saves 64 Chinese seamen from burning freighter

WATER WORLD
Angkor Wat builders may have had shortcut

Taking aim at rivals, Apple unveils iPad mini

Japan firm launches real-time telephone translation

Microsoft gives peek at new Windows, tablet

WATER WORLD
A Mississippi River diversion helped build Louisiana wetlands

Leisure boats threaten the Swedish West Coast archipelago

Climate change threatens marine environment in the Baltic Sea

Egypt pushes Ethiopia to scrap Nile dam

WATER WORLD
Arctic seafloor said littered with plastic

Leonardo DiCaprio urges Antarctic ocean sanctuary

Green groups presses Antarctica meet to expand marine haven

Ice sheet retreat controlled by the landscape

WATER WORLD
Panels reject study on GM corn but urge wider probes

Indian farmers cotton on to sustainable farming

Pesticides have knock-on effect for bees: study

Some 500 scientists have created a Top 10 list of plant-damaging fungi

WATER WORLD
Jamaica, Cuba issue hurricane warnings

Italian scientists sentenced to jail in quake trial

JPL Scientists Participate in ShakeOut Exercises

Hundreds of pilgrims evacuated as floods swamp Lourdes

WATER WORLD
Climate variability and conflict risk in East Africa measured by Boulder team

Two Guinea-Bissau politicians badly beaten by soldiers

Fear stalks DR Congo's rebel-held territory

Argentina: UN an option over Ghana ship seizure

WATER WORLD
Japanese lake record improves radiocarbon dating

Novel chewing gum formulation helps prevent motion sickness

Discovery of two opposite ways humans voluntarily forget unwanted memories

The evolutionary origins of our pretty smile




The content herein, unless otherwise known to be public domain, are Copyright 1995-2014 - Space Media Network. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA Portal Reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. Advertising does not imply endorsement,agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. Privacy Statement