HOME >> BIOLOGY >> NEWS
Collapse of seals, sea lions & sea otters in North Pacific triggered by overfishing of great whales

ions between changes in open ocean populations and coastal environments. This is most apparent in Estes' study sites throughout the Aleutian Archipelago where he and his team have studied kelp forests for over thirty years. "What we've seen is that the kelp forest ecosystem in South Western Alaska went from being robust to beinggone. It's staggering that it occurred over such a large area in such a short time just a few years," says Estes. "The food web interconnectivity - that urchin explosions could be linked to whaling 50 years ago - is amazing."

"We may take well intended actions to protect species like sea otters - but that may not be enough if we've unwittingly set in motion other disturbances that eventually impact different animals in different places," says Jeremy Jackson, of Scripps Institution of Oceanography. Jackson was the lead author on a widely cited paper in Science that first demonstrated pervasive impacts of historic disturbances on ocean ecosystems. "This is the most dramatic example to date," says Jackson. "It's so counterintuitive - and reaches back beyond memory and across the entire North Pacific Ocean."

"The message," says Springer, "is that overfishing and massive extraction can lead to food web impacts that are unexpected and unintended."

The authors feel that the importance of predation in structuring food webs needs to be more fully appreciated and understood and humans are the ultimate predators. This points to the need for caution in managing fisheries today. The kind of extraction that happened with whales fifty years ago still goes on with other species, wearing away the resilience of the system.

"To me it very much is an overfishing problem same damn thing but fifty years ago whales were the fish," say Estes.


'"/>

Contact: Jessica Brown
jbrown@seaweb.org
202-497-8375
SeaWeb
22-Sep-2003


Page: 1 2 3 4

Related biology news :

1. Scientists: Collapse of coastal ecosystems tied to past overfishing
2. Collapse of simple life forms linked to mass extinction 200 million years ago
3. Multi Drug Resistant-TB: Russian Economic Collapse Will Lead To Global Spread Of "Ebola With Wings"
4. Video cameras reveal seals, whales, and other marine mammals take a laid-back approach to deep diving
5. Health of worlds sea lions the focus of Wakefield Symposium
6. Study finds anti-HIV protein evolved millions of years before the emergence of AIDS
7. SensorNet proposed as system to protect millions nationwide
8. Drug developed for rare disease may help millions more as treatment for cancer, autoimmune diseases
9. Hydrothermal vent systems could have persisted millions of years, incubated life
10. NIH awards millions to Rutgers for genetics research
11. Electric vehicles promise economic benefits in the billions

Post Your Comments:
(Date:7/21/2014)... A University of California, San Diego School of Medicine-led ... not recognize the potentially serious health consequences of childhood ... in helping their child reach a healthy weight. , ... of the Academy of Nutrition and Dietetics . , ... and physical activity behaviors," said lead author Kyung Rhee, ...
(Date:7/21/2014)... cheating in science are among the topics to ... experts in Montreal at the three International Union ... to August 1, 2014. Some 2,000 participants from ... 14th International Congress of Bacteriology and Applied Microbiology, ... Microbiology, and the 16th International Congress of Virology. ...
(Date:7/21/2014)... 154 hotspots in areas across Riau province on Sunday, ... again following a decline in rainfall. The number ... than what had been reported one day prior, which ... scattered in six regencies and municipalities, most of which ... related haze it creates could potentially spread via winds ...
Breaking Biology News(10 mins):Parents rank their obese children as 'very healthy' 2Montreal hosts International Union of Microbiology Societies congresses 2
(Date:7/22/2014)... CTD Holdings, Inc. (OTCQB:CTDH), a manufacturer ... cosmetics, and other markets, announced today that it has ... qualified private investors led by Novit L.P., an investment ... transaction involved the signing of a Securities Purchase Agreement ... Stock at a price per share of $1.00, resulting ...
(Date:7/22/2014)... 22, 2014 Automated cell culture systems ... of cell culture. They allow production of optimum cells ... researchers in drug discovery and industries and biopharmaceutical companies. ... production, iPSC research, cryobanking, cell-based assays, and cellular expression ... , Analysts forecast the Global Cell Culture market ...
(Date:7/22/2014)... Wisconsin (PRWEB) July 22, 2014 ... in attendance at the 2014 NCSL International Workshop ... Booth #423 will feature CONDEC pressure instrumentation, OIML ... weights, and the new, customized sets, Essential Weights™. ... to promote cooperative efforts in solving the common ...
(Date:7/22/2014)... (PRWEB) July 22, 2014 The ... clear and concise visual representation of history, migration, and ... was always regaled by family history stories stemming from ... as the "old country." Pictures and 8mm home movies ... side of the family, and Steve ordered a test ...
Breaking Biology Technology:CTD Holdings Closes $1.725 Million Private Placement 2CTD Holdings Closes $1.725 Million Private Placement 3Global Cell Culture Market to Grow at 10.27% CAGR by 2018 Forecasts a New Research Report ReportsnReports.com 2Global Cell Culture Market to Grow at 10.27% CAGR by 2018 Forecasts a New Research Report ReportsnReports.com 3Global Cell Culture Market to Grow at 10.27% CAGR by 2018 Forecasts a New Research Report ReportsnReports.com 4Rice Lake Weighing Systems Showcases Metrology Solutions for the 2014 NCSL International Workshop & Symposium 2DNA Test from DNA Spectrum Shows Heritage Like a Map of the Past 2DNA Test from DNA Spectrum Shows Heritage Like a Map of the Past 3DNA Test from DNA Spectrum Shows Heritage Like a Map of the Past 4
Cached News: