Navigation Links
Seals quickly respond to gain and loss of habitat under climate change
Date:7/9/2009

y was lost."

This habitat was released after the retreat of the grounded ice sheet in the Ross Sea Embayment 7,500-8,000 years ago, and is within the range of modern foraging excursions from the Macquarie Island colony. Using ancient mtDNA and evolutionary models, the research team tracked the population dynamics of the now extinct colony and the connectivity between this and modern breeding sites.

The team found clear signs of rapid expansion in the new colony 8,000 years ago. This was followed by directional migration away, coupled with a loss of diversity 1,000 years ago, when the sea ice is thought to have expanded. The data suggest that the new colony seals came initially from Macquarie Island, and that some returned there, but in much smaller numbers, when the new colony habitat was lost 7,000 years later.

In order to understand how biodiversity is generated and maintained over time, the team has set out to understand the process by which the seal populations formed and diverged. They analysed data from ancient DNA to show how elephant seal populations responded when new breeding habitat was gained and then lost over the course of approximately 7,000 years.

Professor Rus Hoelzel said: "Using ancient DNA, we were able to track the dynamics and diversity of a population from its foundation, through to its extinction, in the context of Holocene climate change. We learned that new habitat emerging within the species' migratory range could be quickly taken advantage of, but that the reverse was not true. The movement patterns of seals from this Antarctic breeding site would have been unlikely to take them near other potential breeding sites, and so when their breeding site was lost, their numbers crashed.

"The seals that discovered the new breeding site had things good, because food was abundant and nearby, however when the ice returned, the new colony collapsed and only a few seals made it back to their original h
'/>"/>

Contact: Carl Stiansen
media.relations@durham.ac.uk
44-191-334-6077
Durham University
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Fossil evidence of missing link in the origin of seals, sea lions, walruses found in Canadian Arctic
2. NTU seals global partnerships on environmental sciences R&D
3. Mercury pollution causes immune damage to harbor seals
4. Southern Ocean seals dive deep for climate data
5. TGen spin-off MedTrust Online enables cancer doctors to quickly obtain best-available information
6. Portable device quickly detects early Alzheimers
7. Scripps scientists develop new tests that identify lethal prion strains quickly and accurately
8. UF botanists: Flowering plants evolved very quickly into 5 groups
9. Simple reason helps males evolve more quickly
10. Twinkle after-effect can help retinal patients detect vision loss quickly and cheaply
11. International team shows mercury concentrations in fish respond quickly to increased deposition
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:11/7/2014)... -- Leading Biometric companies aim to provide consumers ... transactions.  Companies in focus today are: NXT-ID, Inc. (NASDAQ: ... ), Google Inc. (NASDAQ: GOOG ), Microsoft Corporation ... EBAY ) and MasterCard Inc. (NYSE: MA) NXT-ID, ... authentication company focused on the growing mobile commerce is pleased ...
(Date:11/6/2014)... is an asset for a predator. Except when that predator ... tiger beetle, relative to its size, is the fastest creature ... body lengths per second (at about five miles per hour). ... take the sprinting gold from the tiger beetle, a person ... The tiger beetle has a problem. At peak speeds, everything ...
(Date:11/5/2014)... RENO – Kelly Redmond has dedicated his career ... knowledge to a general audience. , As deputy ... Climate Center at Nevada,s Desert Research Institute, Redmond ... the management, application and dissemination of climate data ... Annual Fall Meeting in San Francisco on December ...
Breaking Biology News(10 mins):Universal Authentication Methods Provide More Secure Operations for Biometrics Devices - Company Joins FIDO Alliance for Consumer Protection 2Universal Authentication Methods Provide More Secure Operations for Biometrics Devices - Company Joins FIDO Alliance for Consumer Protection 3Universal Authentication Methods Provide More Secure Operations for Biometrics Devices - Company Joins FIDO Alliance for Consumer Protection 4Universal Authentication Methods Provide More Secure Operations for Biometrics Devices - Company Joins FIDO Alliance for Consumer Protection 5Universal Authentication Methods Provide More Secure Operations for Biometrics Devices - Company Joins FIDO Alliance for Consumer Protection 6The tiger beetle: Too fast to see 2Nevada climatologist to be honored at AGU Fall Meeting for lifetime of public outreach 2
... Learning more about the behavior of bed ... Agriculture (USDA) scientists to identify compounds to help control these ... decade has caused problems in major U.S. cities where they ... The small, blood-feeding insects are not known to transmit diseases, ...
... February 14 between 1:15 p.m., and 3:30 p.m. PST, ... Pregnancy Meeting , in San Francisco, California, researchers will ... (FER) have better outcomes compared to fresh in vitro ... general population. The study collected data from all ...
... Boston College biologist Ken Williams, whose research focuses on ... illnesses that strike people living with HIV and AIDS, ... the NIH,s National Institute of Neurological Disorders and Stroke. ... for Williams, research into monocyte and macrophage cells, which ...
Cached Biology News:Studying bed bug actions for new management tactics 2NIH grant funds Boston College research into illnesses afflicting people living with HIV 2
(Date:11/26/2014)... HOUSTON and PHILADELPHIA , ... the most demanding and unforgiving environments. Human exploration of ... cognitive performance to ensure mission safety and success, and ... cognitive performance for mission success, little is known about ... aspects of cognition are primarily affected. Now, ...
(Date:11/26/2014)... Winston-Salem, NC (PRWEB) November 26, 2014 ... Medical Advisory Board. PMG Research is a network of sites ... with access to over 2 million patient lives through its ... Research is comprised of 11 hub site locations in the ... , The first term of the board will ...
(Date:11/26/2014)... November 25, 2014 Continuing its award-winning ... earned three prestigious MarCom Awards for outstanding creative achievement ... a Platinum MarCom Award, the organization’s top honor, in ... St. Louis held in April of this year. The ... 14,000 attendees. Additionally, Nerium was awarded a Gold MarCom ...
(Date:11/26/2014)... SoundConnect , an award winning unified communications ... Darren Suders has joined the team as Director of ... partner program through innovative offerings, consistent partner ... brings more than 10-years of channel telecommunication experience to ... from policy development, to partner education and to expansion. ...
Breaking Biology Technology:Penn Medicine Team Develops Cognitive Test Battery to Assess the Impact of Long Duration Spaceflights on Astronauts' Brain Function 2Penn Medicine Team Develops Cognitive Test Battery to Assess the Impact of Long Duration Spaceflights on Astronauts' Brain Function 3Penn Medicine Team Develops Cognitive Test Battery to Assess the Impact of Long Duration Spaceflights on Astronauts' Brain Function 4PMG Research Names Medical Advisory Board 2PMG Research Names Medical Advisory Board 3Nerium International™ Wins One Platinum, Two Gold MarCom Awards 2SoundConnect Appoints Director of Channel Development & Sales 2
... Biomarker for Prostate Cancer, ANN ARBOR, Mich., June ... profiling data and analysis tools, today,announced the central role ... of SPINK1 as a key new therapeutic target and,biomarker ... compendium of nearly 26,000 gene,expression and DNA copy number ...
... Chemetics(R) Technology to Lexicon Targets, COPENHAGEN, June ... with Lexicon Pharmaceuticals, Inc. (Nasdaq: LXRX ) ... compounds for highly,validated drug targets., Under the ... technology will be applied to identify novel small ...
... Texas Oncology-Baylor Charles A.,Sammons Cancer Center, a ... Trial Participation Award at the recent 44th American ... The practice was one of,only 10 community oncology ... the fifth consecutive year that practices affiliated with ...
Cached Biology Technology:Oncomine(TM) Again Key to Prostate Cancer Discovery 2Nuevolution Announces Drug Discovery Alliance With Lexicon Pharmaceuticals 2Nuevolution Announces Drug Discovery Alliance With Lexicon Pharmaceuticals 3Texas Oncology-Baylor Sammons Cancer Center Recognized for Highest Commitment to Clinical Research at ASCO 2