HOME >> BIOLOGY >> NEWS
Huge iceberg wreaks havoc on Antarctic marine ecosystem, study finds

For the second time in 26 months, a massive iceberg has clogged a large portion of Antarctica's Ross Sea, causing what could turn out to be a devastating loss of penguins and other marine life, according to a NASA-funded study by Stanford scientists. Using satellite data, geophysicists Kevin Arrigo and Gert L. van Dijken monitored the movements of a giant iceberg named "C-19," which calved off the western face of the Ross Ice Shelf in May 2002. C-19 is one of the largest icebergs ever recorded -- 19.2 miles wide and 124 miles long, or nearly twice as big as Rhode Island.

Arrigo is an assistant professor of geophysics, and van Dijken is a science and engineering associate in the department. In a study published in the American Geophysical Union's Geophysical Research Letters, the authors described how C-19 drifted northward from May until November 2002, when it apparently ran aground. By January 2003, the iceberg had become trapped against a shallow bank, eventually forming a perpendicular barrier that prevented sea ice from moving out of the southwestern Ross Sea for the next three months -- a crucial time of year when tons of microscopic marine algae, called phytoplankton, normally bloom in open water.

Phytoplankton are a major food source for krill, which in turn are consumed by fish, seals, penguins and whales. Without massive amounts of phytoplankton, the entire food chain in the Ross Sea can collapse.

Like plants, phytoplankton grow through the process of photosynthesis, using chlorophyll to convert sunlight into food. But unusually high levels of sea ice will block sunshine, preventing phytoplankton from growing.

Green waters

To determine phytoplankton production levels in the Ross Sea, the researchers examined data from SeaWIFS -- the Sea-viewing Wide Field-of-view Sensor aboard NASA's SeaStar satellite.

"SeaWIFS measures the amount of light coming out of the ocean at different wavelengths," noted Arrig
'"/>

Contact: Mark Shwartz
mshwartz@stanford.edu
650-723-9296
Stanford University
3-Oct-2003


Page: 1 2 3

Related biology news :

1. MicroRNA targets: How big is the iceberg?
2. Huge Antarctic iceberg makes a big splash on sea life
3. Massive icebergs may affect Antarctic sea life and food chain
4. Giant icebergs, unprecedented ice conditions threaten Antarctic penguin colonies
5. First sea-level photographs released of massive Antarctic iceberg
6. Tiny beetle wreaks havoc on Texas ornamental tree nurseries
7. JAK2 enzyme helps protect brain cells, wreaks havoc on blood vessels
8. Unwanted HRT playing havoc with songbirds
9. Dispute over life in Antarctic lake
10. Design competition for new Antarctic Research Station
11. The Hunters Breath tells a story of adventure and discovery in Antarctica

Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Huge iceberg wreaks havoc Antarctic marine ecosystem study finds

(Date:3/19/2015)... OXFORD, Conn. , March 19, 2015  NXT-ID, Inc. ... biometric authentication company focused on the growing mobile commerce market, ... featured in a news clip that aired this week on ... http://www.myfoxdc.com/ ) . In a segment "The Next ... smart wallet ,a new way to pay, and ,a really ...
(Date:3/17/2015)... NEW YORK , March 17, 2015 /PRNewswire/ ... , the largest exhibition for service robots ever ... . RoboUniverse takes place on May 11-13, 2015 ... Sponsors and exhibitors for the event include: Acorn ... Motion Control; EZ-Robot; Infranor; Kinova Robotics; Littler; NewBotic ...
(Date:3/12/2015)... -- Beta Systems today announced Fast ... (IAM) solution for a fixed price and with ... IAM package, customers benefit from the 30 years, ... implementations across different industries. The new fixed-price IAM ... necessary services and consulting. It spans the implementation ...
Breaking Biology News(10 mins):NXT-ID's Wocket Smart Wallet Featured on Fox News Segment, "The Next Great Thing" 2NXT-ID's Wocket Smart Wallet Featured on Fox News Segment, "The Next Great Thing" 3MecklerMedia's RoboUniverse New York Announces Sponsors and Exhibitors, May 11-13, 2015 2Beta Systems Fast Forward IAM Available Now: a Standardized IAM Package at a Fixed Price 2
(Date:3/27/2015)... Buffalo, New York (PRWEB) March 27, 2015 ... of the 2015 application period for 43North - the ... cash prizes, including a grand prize of $1 million, ... attracts entrepreneurs from around the world to compete for ... into funded enterprises in the Western New York region. ...
(Date:3/26/2015)... 2015  BioNano Genomics, Inc., the leader in genome ... as chief commercial officer. Salyer has more than 20 ... in life sciences. At BioNano, Salyer will oversee the ... platform to assemble a comprehensive view of complex genomes ... 32 institutions located in the United States ...
(Date:3/26/2015)... 26, 2015 "In America," the popular news ... States that is hosted by legendary film actor James Earl ... botany in an upcoming segment. , Botany is commonly ... it is actually quite a bit more complicated than that. ... types of living organisms, from the smallest bacteria known to ...
(Date:3/25/2015)... 25, 2015 /PRNewswire/ - SQI Diagnostics Inc. ("SQI" or the ... result of recent discussions with certain shareholders representing approximately ... Company, after dealing with certain matters including the appointment ... shareholders on March 26, 2015 (the "Meeting") it intends ... directors will take place when the Meeting reconvenes. The ...
Breaking Biology Technology:Governor Andrew M. Cuomo Anounces Launch of Year Two of World's Largest Business Idea Competition and Opening of New Incubator Space in Buffalo, New York 2Governor Andrew M. Cuomo Anounces Launch of Year Two of World's Largest Business Idea Competition and Opening of New Incubator Space in Buffalo, New York 3Governor Andrew M. Cuomo Anounces Launch of Year Two of World's Largest Business Idea Competition and Opening of New Incubator Space in Buffalo, New York 4Governor Andrew M. Cuomo Anounces Launch of Year Two of World's Largest Business Idea Competition and Opening of New Incubator Space in Buffalo, New York 5BioNano Genomics Appoints Terry Salyer as Chief Commercial Officer 2BioNano Genomics Appoints Terry Salyer as Chief Commercial Officer 3SQI Diagnostics Inc. Announces New Nominees to SQI Diagnostics Board and Adjournment of Meeting 2SQI Diagnostics Inc. Announces New Nominees to SQI Diagnostics Board and Adjournment of Meeting 3SQI Diagnostics Inc. Announces New Nominees to SQI Diagnostics Board and Adjournment of Meeting 4SQI Diagnostics Inc. Announces New Nominees to SQI Diagnostics Board and Adjournment of Meeting 5
Cached News: