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:12/17/2014)... 2014 Research and Markets ( ... "Samsung Galaxy S5 - Home Button Synaptics ... offering. http://photos.prnewswire.com/prnh/20130307/600769 ... technology than the iPhone 5S, Samsung introduces for ... product. The Galaxy S5 home button ...
(Date:12/17/2014)...  Automation is fundamentally transforming the travel experience ... international borders. Over the past decade, ePassports, biometric ... travelers to self process through border control via ... an increasing number of airports, seaports, and land ... to Maxine Most , Principal at Acuity ...
(Date:12/11/2014)... , Dec. 10, 2014  Data Sciences ... monitoring, has released a new series of digital ... preclinical toxicology researchers. M series, part of the ... collect the best possible physiologic data when incorporating ... Adding functional endpoints to toxicology studies has evolved ...
Breaking Biology News(10 mins):Samsung Galaxy S5 - Home Button Synaptics Fingerprint Sensor Technology Analysis 2Automated Border Control (ABC) Transforms the Global Travel Experience With More Than 2500 ABC eGates and APC Kiosks Deployed In Airports, Seaports, and Land Borders Worldwide 2New telemetry implants expected to change how large animal toxicology studies are conducted 2
(Date:12/19/2014)... (PRWEB) December 18, 2014 Reports from ... the United States suffer from one or more chronic ... or cancer. Medication can address some of these diseases, ... activities that many sufferers face. While implanted nerve stimulation ... stimulate the whole nerve, which can induce side effects. ...
(Date:12/19/2014)... CA (PRWEB) December 18, 2014 With ... limited time special on Sartorius Biohit products . ... on mLINE pipettes, Picus Electronic Pipette Trade-in Program, and ... Health and Safety officers around the world. They are ... pipetting. Other features include:, ,     Full volume ...
(Date:12/19/2014)... , Dec. 18, 2014 Relmada Therapeutics, Inc. ... the treatment of chronic pain, announced the results of ... "This was a transformational year in Relmada,s history ... for our company," said Sergio Traversa , chief ... have executed on key financial, human resource and clinical ...
(Date:12/17/2014)... Achim Noack has been named global vice ... this position, Noack will assist Jerry Stoller, CEO and ... strategy and supervise global marketing management and implementation of ... knowledge and experience in the crop protection industry,” says ... innovative thinking will be a great asset for Stoller ...
Breaking Biology Technology:Draper Wins GSK Funding for Smaller, Smarter Implantable Devices 2Major Pipette Distributor Pipette.com Announces Sartorius Year End Specials 2Relmada Therapeutics Announces Results of Annual Shareholders Meeting 2Achim Noack Joins Stoller Group as Global Vice President of Marketing and Administration 2
Cached News: