HOME >> BIOLOGY >> NEWS
Giant icebergs, unprecedented ice conditions threaten Antarctic penguin colonies

Enormous grounded icebergs and an unprecedented amount of sea ice in Antarctica's Ross Sea have nearly isolated one of the continent's most populous Adelie penguin colonies, making it difficult for the birds to return from their feeding grounds in the open sea, according to researchers funded by the National Science Foundation (NSF).

The numbers of Adelie penguins at Cape Crozier, about 130,000 breeding pairs in most years, "are at the low side" of the normal range, said David Ainley of H.T. Harvey & Associates of San Jose, California. A smaller colony of Adelies at Cape Royds will "fail totally" this year, he added.

Meanwhile, a small colony of about 1,200 Emperor penguins at Cape Crozier failed to raise chicks, according to Gerald Kooyman of the Scripps Institution of Oceanography. He said the birds probably abandoned efforts to breed when the icebergs, pushing southward, destroyed and closed off their usual breeding area. Those that did breed, and attempted to hatch the egg or raise the chick in the area, failed during incubation or soon after hatching.

The icebergs are designated B-15A and C-16. Iceberg B-15A is 37 kilometers (20 nautical miles) wide and 87 kilometers (47 nautical miles) long. Berg C-16 is roughly 18.5 kilometers (10 nautical miles) wide by 55 kilometers (30 nautical miles) long. The icebergs broke away from the Ross Ice Shelf in March 2000 and gradually migrated west to a point northeast of McMurdo Sound, creating a barrier that altered wind and current patterns.

Early this season, the sea ice extended roughly 128 kilometers (80 miles) north of McMurdo Station, the main U.S. research station in Antarctica, located on Ross Island. At this time of year, the ice edge typically extends between 24 and 32 kilometers (15 and 20 miles) north of the station. Recent storms have reduced the extent of the ice greatly; it now extends 61 kilometers (33 nautical miles) from McMurdo.

The extensive sea ice has
'"/>

Contact: Peter West
pwest@nsf.gov
703-292-8070
National Science Foundation
26-Dec-2001


Page: 1 2 3

Related biology news :

1. Giant bloom fades, science continues
2. Scientist probes fossil oddity: Giant redwoods near North Pole
3. Giant pandas have plenty of genetic diversity
4. From dolphins to the Giant Panda - chemistry at SeaWorld and the San Diego Zoo
5. Giant jellies invade Gulf of Mexico threatening shrimp fishery
6. Giant plant-eating dinosaur found; two cast skeletons to be unveiled
7. First Dinosaur Embryo Skin Discovered -- Unhatched Embryos Are First Ever Found Of Giant-Plant Eating Dinosaurs
8. Cells gatekeeper for ammonia revealed in unprecedented detail
9. Century may bring unprecedented climate change to southern hemisphere
10. Worlds leading scientists issue unprecedented plan for protecting ocean and marine life
11. NYU medical centers cardiothoroacic surgeons announce unprecedented heart animation

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:12/5/2018)... , ... December 03, 2018 , ... ... Aesthetics , an emerging leader in the distribution and marketing of cutting-edge aesthetic ... growth, projecting $20MM in sales for 2018. Cartessa’s success can be attributed ...
(Date:12/5/2018)... DIEGO (PRWEB) , ... December 04, 2018 , ... ... leverage Fastec’s extensive expertise and existing IP in the development of innovative solutions ... has been integrated into diverse systems from microfluidics to industrial machinery and instrumentation, ...
(Date:11/27/2018)... ... 2018 , ... PulseEd™ uses researched technology, published in the Journal of ... flow to the penis. Regular and unimpeded blood flow to the blood vessels of ... function. The recorded results of SWT (sound wave therapy), indicated that almost 80% of ...
Breaking Biology News(10 mins):
(Date:11/13/2018)... ... November 13, 2018 , ... Renowned Honolulu veterinarian, Dr. Patrick Leadbeater, has ... Kauai. Dr. Leadbeater, of Kahala Pet Hospital on Oahu, is a ... began traveling to the island of Kauai on an almost weekly basis to perform ...
(Date:11/13/2018)... , ... November 13, 2018 , ... , Park Systems, ... in China. With the increasingly growing demand for AFM technology in China, Park Systems ... communities by opening an office in Beijing equipped with Park AFM. , The Grand ...
(Date:11/9/2018)... ... November 08, 2018 , ... IC System, one of ... approach to increasing recovery rates by creating a comprehensive contact strategy for each ... developed by NLP Logix, a Jacksonville, Florida-based AI solutions company, and leveraged the ...
(Date:11/6/2018)... and TAHOE, Nev. (PRWEB) , ... November 06, ... ... to their native mobile app for clinical trial data collection and management. ... Now, iPhone users with compatible generation devices can quickly and easily sign in ...
Breaking Biology Technology:
Cached News: