Navigation Links
Sky islands: metaphor or misnomer?
Date:8/13/2008

The term "sky islands" sounds intriguing, but it may be more lyrical than useful when discussing mammal distributions, according to new research from Eric Waltari of the Sackler Institute of Comparative Genomics at the American Museum of Natural History and Robert Guralnick from the University of Colorado at Boulder. The team used an emerging technique, ecological niche modeling, to show that the populations of small mammals living on mountaintops in the Great Basinon islands in the skyare not as isolated as previously thought.

"Niche modeling is a quick and straightforward approach to addressing problems that molecular data will eventually solve," says Waltari. "Are the animals on 'sky islands' isolated?"

The answer is no. "Sky islands" is a biogeographical term that was coined to describe the habitats of species living high on mountaintops, habitats thought to be solidly isolated. In the new paper published in the early online version of the , Waltari and Guralnick test the concept of geographic isolation on thirteen species of jackrabbits, shrews, ground squirrels, and other small mammals. The species chosen have detailed location records that were mapped with current and past climate data, such as temperature and rainfall, to "backcast" the distribution of each species at the height of the last ice age 21,000 years ago. The predictions of the model are calibrated with known fossil records. Backcasting allows researchers to test whether species had wider ranges or different distributions in the past; the current study, for example, found that most of the species (12 of 13) lived at lower elevations 21,000 years ago and that the average distribution of each species was larger than it is now.

Determining the area that species inhabited in the past helps researchers understand current population distribution within the western U.S.'s Great Basin and potential linkages between "sky islands," links that ca
'/>"/>

Contact: Kristin Phillips
kphillips@amnh.org
212-496-3419
American Museum of Natural History
Source:Eurekalert

Page: 1 2

Post Your Comments:
*Name:
*Comment:
*Email:
(Date:8/28/2014)... MARC (Maximizing Access to Research Careers) Program has announced ... Human Genetics from October 18 22, 2014 in ... promote the entry of students, post doctorates and scientists ... science community and to encourage the participation of young ... This year MARC conferred 16 awards totaling $29,600., The ...
(Date:8/28/2014)... Researchers at the University of Minnesota have developed ... to be used for muscle regeneration research as well ... FSHD. , The research is published in the current ... There is no treatment for FSHD, which is thought ... muscular dystrophy. FSHD is an unusual genetic disorder because, ...
(Date:8/28/2014)... Ga. The support of peer groups and ... breastfeeding programs, according to recent University of Georgia ... in the Athens-Clarke County area determined that role ... outcomes of mothers of infants. , "Mothers who ... successful at breastfeeding," said study co-author Alex Anderson, ...
Breaking Biology News(10 mins):UMN researchers find animal model for understudied type of muscular dystrophy 2Breastfeeding study shows need for effective peer counseling programs 2
... which they can pass on to humans. But now research ... Research says that pigs get HEV early enough to minimise ... worry about would occur if the infection rate in pigs ... chance pigs will pass on HEV to humans at slaughter. ...
... Dr Pep Canadell, from the Global Carbon Project and CSIRO ... that tropical deforestation releases 1.5 billion tonnes of carbon each ... accounts for nearly 20 per cent of carbon emissions due ... estimated 87 to 130 billion tonnes of carbon by 2100, ...
... grazing normally on algae in the rocky intertidal zone of ... by a parasite. But the better news is, according to ... might have more to eat if plenty of your neighbors ... of the National Academy of Sciences Early Edition ( http://www.pnas.org/papbyrecent.shtml ...
Cached Biology News:Confirmed -- deforestation plays critical climate change role 2Parasites' impact goes beyond host to affect ecosystem 2Parasites' impact goes beyond host to affect ecosystem 3
(Date:8/28/2014)... this month, a report was created by Colorado ... Force on the performance of vehicles using an eco-friendly, ... fuel made from mustard seeds, offered great potential as ... friendly future. In fact, every branch of the U.S. ... foreign oil over the next few years. They will ...
(Date:8/28/2014)... New York, NY (PRWEB) August 28, 2014 ... has renewed its long term partnership with PTI ... to provide clients with state of the art leak ... state of the art instruments currently available. As part ... a new High Voltage Leak Detection Instrument ...
(Date:8/27/2014)... Rhythm, a biopharmaceutical company developing peptide therapeutics ... in metabolic disorders, announced today that it has filed ... Securities and Exchange Commission (SEC) relating to the proposed ... The number of shares to be offered and the ... determined. Citigroup and Cowen and Company will ...
(Date:8/27/2014)... 27, 2014   MSC , a healthcare performance ... announced the appointment of Mary Beth Loesch ... years of experience preparing companies for rapid growth and ... Vice President of Corporate Development and Healthcare. In that ... , as well as corporate strategy and marketing. Previously, ...
Breaking Biology Technology:Can Small Farmers and a New Seed Based Biofuel “Green” the World? Major Universities and Even the U.S. Air Force Seem to Think So 2Can Small Farmers and a New Seed Based Biofuel “Green” the World? Major Universities and Even the U.S. Air Force Seem to Think So 3Can Small Farmers and a New Seed Based Biofuel “Green” the World? Major Universities and Even the U.S. Air Force Seem to Think So 4Can Small Farmers and a New Seed Based Biofuel “Green” the World? Major Universities and Even the U.S. Air Force Seem to Think So 5Whitehouse Labs Renews Partnership with PTI Inspection Systems 2Whitehouse Labs Renews Partnership with PTI Inspection Systems 3Rhythm Files Registration Statement for Proposed Initial Public Offering 2MSC names Mary Beth Loesch President and CEO 2
... MONTVALE, N.J., May 13 Synvista Therapeutics,Inc. (Amex: ... a 160-patient Phase 2 study,of alagebrium in patients with ... A.G.E. [Advanced Glycation End Product],Breaker Alagebrium in Diastolic Heart ... the effect of six months,of oral treatment with 400mg ...
... Yields First Milestone, NEW YORK, May 13 ... pre-disease collection, processing and long-term,storage of adult stem cells ... been secured for a new stem cell collection center ... Smith, MD MBA, NeoStem,s Chairman and Chief Executive Officer,commented: ...
... May 13 /PRNewswire-FirstCall/ - AEterna Zentaris Inc.,(NASDAQ: ... biopharmaceutical company focused on,endocrine therapy and oncology, ... Phase 2 study of subcutaneously,administered LHRH antagonist ... (BPH", has been accepted for publication in ...
Cached Biology Technology:Synvista Therapeutics Announces Initiation of the BREAK Study of Alagebrium for Diastolic Heart Failure 2Synvista Therapeutics Announces Initiation of the BREAK Study of Alagebrium for Diastolic Heart Failure 3Synvista Therapeutics Announces Initiation of the BREAK Study of Alagebrium for Diastolic Heart Failure 4NeoStem to Expand Stem Cell Collection Center Network to Florida 2NeoStem to Expand Stem Cell Collection Center Network to Florida 3AEterna Zentaris: Article on Phase 2 Trial with Cetrorelix in BPH to be Published in European Urology Journal 2AEterna Zentaris: Article on Phase 2 Trial with Cetrorelix in BPH to be Published in European Urology Journal 3AEterna Zentaris: Article on Phase 2 Trial with Cetrorelix in BPH to be Published in European Urology Journal 4AEterna Zentaris: Article on Phase 2 Trial with Cetrorelix in BPH to be Published in European Urology Journal 5AEterna Zentaris: Article on Phase 2 Trial with Cetrorelix in BPH to be Published in European Urology Journal 6
Purified Mouse anti-Hu p120 Catenin (pT916) Storage Temperature: Refrigerate(2 to 8C)...
Request Info...
ROCK-1 (cleaved) Monoclonal Ab 100 ug purified mouse monoclonal antibody. Clone# 12M03. Reacts with human. Tested in Western blot analysis....
Anti-Cullin-1 Host: rabbit polyclonal Species Reactivity: human, mouse Applications: IHC(P), WB, IP Storage: 4C...
Biology Products: