Featured Research

from universities, journals, and other organizations

European seafloor survey reveals depth of marine litter problem

Date:
April 30, 2014
Source:
University of Plymouth
Summary:
A major new survey of the seafloor has found that even in the deepest ocean depths you can find bottles, plastic bags, fishing nets and other types of human litter. The litter was found throughout the Mediterranean, and all the way from the continental shelf of Europe to the Mid-Atlantic Ridge 2,000 kilometers from land. Litter is a problem in the marine environment as it can be mistaken for food and eaten by some animals or can entangle coral and fish -- a process known as "ghost fishing."

This shows litter items on the seafloor of European waters. Clockwise from top left i) Plastic bag recorded by an OFOS at the HAUSGARTEN observatory (Arctic) at 2500 m; ii = Litter recovered within the net of a trawl in Blanes open slope at 1500 m during the PROMETO 5 cruise on board the R/V "Garcํa del Cid"; iii) Cargo net entangled in a cold-water coral colony at 950 m in Darwin Mound with the ROV "Lynx" (National Oceanography Centre, UK). iv) "Heineken" beer can in the upper Whittard canyon at 950 m water depth with the ROV Genesis.
Credit: Image credit: Pham CK et al. doi:10.1371/journal.pone.0095839

A major new survey of the seafloor has found that even in the deepest ocean depths you can find bottles, plastic bags, fishing nets and other types of human litter.

The litter was found throughout the Mediterranean, and all the way from the continental shelf of Europe to the Mid-Atlantic Ridge 2,000 kilometres from land. Litter is a problem in the marine environment as it can be mistaken for food and eaten by some animals or can entangle coral and fish -- a process known as "ghost fishing."

The international study involving 15 organisations across Europe was led by the University of the Azores, and is a collaboration between the Mapping the Deep Project led by Plymouth University and the European Union-funded HERMIONE Project, coordinated by the National Oceanography Centre, Southampton. Other UK project partners that contributed to the study are the University of Southampton and the British Geological Survey.

Scientists took nearly 600 samples from across the Atlantic and Arctic Oceans and in the Mediterranean Sea, from depths ranging from 35 metres to 4.5 kilometres.

Mr Christopher Pham, from the University of the Azores, said: "We found that plastic was the most common litter item found on the seafloor, while trash associated with fishing activities (discarded fishing lines and nets) was particularly common on seamounts, banks, mounds and ocean ridges. The most dense accumulations of litter were found in deep underwater canyons."

Dr Kerry Howell, Associate Professor at Plymouth University's Marine Institute, said: "This survey has shown that human litter is present in all marine habitats, from beaches to the most remote and deepest parts of the oceans. Most of the deep sea remains unexplored by humans and these are our first visits to many of these sites, but we were shocked to find that our rubbish has got there before us."

Litter was located at each site surveyed, with plastic accounting for 41% and derelict fishing gear 34%. Glass and metal, wood, paper/cardboard, clothing, pottery, and unidentified materials were also observed.

Dr Eva Ramirez-Llodra, Marine Biologist from the HERMIONE project, said: "An interesting discovery was relating to deposits of clinker on the sea floor -- this is the residue of burnt coal that had been dumped by steam ships from the late 18th century onwards. We have known that clinker occurs on the deep-sea bed for some time, but what we found was the accumulation of clinker is closely related with modern shipping routes, indicating that the main shipping corridors have not been altered in the last two centuries."

The report outlines the path that plastics in particular can take, originating from coastal and land sources and being carried along continental shelves and slopes into deep water.

Dr Veerle Huvenne, Seafloor and Habitat Mapping Team Leader at the National Oceanography Centre, Southampton, explains: "Submarine canyons form the main connection between shallow coastal waters and the deep sea. Canyons that are located close to major coastal towns and cities, such as the Lisbon Canyon offshore Portugal, or the Blanes Canyon offshore Barcelona, can funnel litter straight to water depths of 4,500m or more."

Dr Howell added: "The large quantity of litter reaching the deep ocean floor is a major issue worldwide. Our results highlight the extent of the problem and the need for action to prevent increasing accumulation of litter in marine environments."


Story Source:

The above story is based on materials provided by University of Plymouth. Note: Materials may be edited for content and length.


Journal Reference:

  1. Christopher K. Pham, Eva Ramirez-Llodra, Claudia H. S. Alt, Teresa Amaro, Melanie Bergmann, Miquel Canals, Joan B. Company, Jaime Davies, Gerard Duineveld, Fran็ois Galgani, Kerry L. Howell, Veerle A. I. Huvenne, Eduardo Isidro, Daniel O. B. Jones, Galderic Lastras, Telmo Morato, Jos้ Nuno Gomes-Pereira, Autun Purser, Heather Stewart, In๊s Tojeira, Xavier Tubau, David Van Rooij, Paul A. Tyler. Marine Litter Distribution and Density in European Seas, from the Shelves to Deep Basins. PLoS ONE, 2014; 9 (4): e95839 DOI: 10.1371/journal.pone.0095839

Cite This Page:

University of Plymouth. "European seafloor survey reveals depth of marine litter problem." ScienceDaily. ScienceDaily, 30 April 2014. <www.sciencedaily.com/releases/2014/04/140430192743.htm>.
University of Plymouth. (2014, April 30). European seafloor survey reveals depth of marine litter problem. ScienceDaily. Retrieved September 18, 2014 from www.sciencedaily.com/releases/2014/04/140430192743.htm
University of Plymouth. "European seafloor survey reveals depth of marine litter problem." ScienceDaily. www.sciencedaily.com/releases/2014/04/140430192743.htm (accessed September 18, 2014).

Share This



More Plants & Animals News

Thursday, September 18, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Chimp Violence Study Renews Debate On Why They Kill

Chimp Violence Study Renews Debate On Why They Kill

Newsy (Sep. 17, 2014) — The study weighs in on a debate over whether chimps are naturally violent or become that way due to human interference in the environment. Video provided by Newsy
Powered by NewsLook.com
Some Tobacco Farmers Thrive Amid Challenges

Some Tobacco Farmers Thrive Amid Challenges

AP (Sep. 16, 2014) — The South's tobacco country is surviving, and even thriving in some cases, as demand overseas keeps growers in the fields of one of America's oldest cash crops. (Sept. 16) Video provided by AP
Powered by NewsLook.com
Scientists Given Rare Glimpse of 350-Kilo Colossal Squid

Scientists Given Rare Glimpse of 350-Kilo Colossal Squid

AFP (Sep. 16, 2014) — Scientists say a female colossal squid weighing an estimated 350 kilograms (770 lbs) and thought to be only the second intact specimen ever found was carrying eggs when discovered in the Antarctic. Duration: 00:47 Video provided by AFP
Powered by NewsLook.com
Raw: Scientists Examine Colossal Squid

Raw: Scientists Examine Colossal Squid

AP (Sep. 16, 2014) — Squid experts in New Zealand thawed and examined an unusual catch on Tuesday: a colossal squid. It was captured in Antarctica's remote Ross Sea in December last year and has been frozen for eight months. (Sept. 16) Video provided by AP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins