Navigation Links
Islands in the sky: How isolated are mountain top plant populations?
Date:1/21/2011

Do mountain tops act as sky islands for species that live at high elevations? Are plant populations on these mountain tops isolated from one another because the valleys between them act as barriers, or can pollinators act as bridges allowing genes to flow among distant populations?

Dr. Andrea Kramer and colleagues from the Chicago Botanic Garden and the University of Illinois at Chicago were interested in pursuing these questions, particularly for a genus of plants, Penstemon (Plantaginaceae), endemic to the Great Basin region of the Western United States. They published their findings in the January issue of the American Journal of Botany (http://www.amjbot.org/cgi/content/full/98/1/109).

The flow of genetic material between populations maintains a species. In plants, if populations are separated by a landscape barrier such that pollen or seeds are unable to traverse either over or through, then the populations will begin to differ, either via mutations or genetic drift over time. However, habitat fragmentation and distance may not always be barriers, depending on the species and their modes of dispersal. And sometimes studies surprise us with their findings.

"These questions become increasingly important in places like the Great Basin as we consider the effects of climate change on native plant communities and the wildlife that depend upon them," Kramer commented. "The majority of the Great Basin region's species diversity is located on mountain tops, and as a generally warming climate drives species to higher elevations, the distance between mountaintop plant populations increases and more is required of the pollinators in order to traverse the arid valleys between them."

Kramer and her colleagues chose Penstemon because these plants provide critical resources for pollinators and other wildlife. But, as Kramer notes, "Until recently
'/>"/>

Contact: Richard Hund
rhund@botany.org
314-577-9557
American Journal of Botany
Source:Eurekalert  

Page: 1 2 3 4

Related biology news :

1. Satellites pinpoint drivers of urban heat islands in the northeast
2. Humans helped vultures colonize the Canary Islands
3. NOAA divers capture invasive lionfish in the Virgin Islands National Park
4. Magical thinking about islands is an illusion
5. Researchers use entire islands in the Bahamas to test survival of the fittest
6. UC Riverside entomologists say biocontrol of insect pest in the Galapagos Islands is a major success
7. LLNL research at Marshall Islands could lead to resettlement
8. The first men and women from the Canary Islands were Berbers
9. The fragility of the worlds coral is revealed through a study of the Northwestern Hawaiian Islands
10. Ocean islands fuel productivity and carbon sequestration through natural iron fertilization
11. Gene switch sites found mainly on shores, not just islands of the human genome
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Islands in the sky: How isolated are mountain top plant populations?
(Date:2/5/2015)... PARK, N.C. , Feb. 5, 2015  Marken ... specialist logistics company and has launched a new marketing ... Clinical Logistics Organization (CLO).  The new campaign focuses on ... on patient, protocol and shipments. The first ... , aligns Marken,s priorities with its client,s priorities. ...
(Date:2/5/2015)... -- New Market Research Reports Title Global ... 2020 has Been Added to GrandViewReseach.com Report Database ... reach USD 5.10 billion by 2020, according to a ... help identify the site of tissue damage in case ... in medical imaging applications. They have been extensively used ...
(Date:2/5/2015)... 3, 2015 Despite a lack of ... such as consumer electronics, automotive, storage and telecommunication ... technology (SMT) screen printers. Innovations in electronics and ... push the adoption curve up. Meanwhile, sale volumes ... glue dispensers are indispensable in the production of ...
Breaking Biology News(10 mins):Marken Launches New Patient-Centric Campaign 2IR Camera Market Worth $5.10 Billion By 2020: Grand View Research, Inc. 2IR Camera Market Worth $5.10 Billion By 2020: Grand View Research, Inc. 3End-user Demand Spurs Global SMT Screen Printers and Glue Dispensers Market 2End-user Demand Spurs Global SMT Screen Printers and Glue Dispensers Market 3
... A high-speed chase across the Panama Canal in a Boston ... filmbut the protagonist of this story brandishes a butterfly net ... at the Smithsonian Tropical Research Institute. , "Our ... drives Sulfur butterfly migrations," said Robert Srygley, former Smithsonian post ...
... attention to National Child Health Day (today), the Preventive Cardiovascular ... consumer survey and launched a campaign to educate families about ... The national survey revealed that more than three in ... heart disease do not begin until adulthood. ...
... SAN DIEGO A Henry Ford Hospital study has identified ... of the most deadly cancers responsible for 2.1 percent of ... only 33 genes were reported associated with head and neck ... and neck-specific gene targets, opening the door to promising new ...
Cached Biology News:Panama butterfly migrations linked to El Niño, climate change 2Americans concerned about heart health, but not proactive enough to prevent it 2Study finds 231 new genes associated with head and neck cancer 2
(Date:3/6/2015)... 2015   BioLife Solutions , Inc. (NASDAQ: ... of proprietary clinical grade hypothermic storage and ... shipping products for cells and tissues  ("BioLife" or ... full year 2014 financial results will be released on Thursday, ... a conference call and live webcast at 1:30 p.m. ...
(Date:3/5/2015)... Va. , March 5, 2015   HX360 ... as semi-finalists in the HX360 Innovation Challenge ... entries, will compete to be chosen as one of ... panel of senior health system executives and venture capitalists ... HX360 Innovation Challenge takes place at the 2015 HIMSS ...
(Date:3/5/2015)... Bi-Biomics today announced a discovery made possible ... improvement in histological quality provided the detail necessary ... daughter cells. , After processing with Ultralight Histology’s ... 1000-1600x using light microscopy. Phylogenetic and histologic ... cells displayed predominant binary features --- one nucleus ...
(Date:3/5/2015)... 2015 Research and Markets ( http://www.researchandmarkets.com/research/4ld5nw/mature_biotech ... Biotech Outlook 2015: New Therapy Ventures Pave the Way ... All biotech companies - Gilead (GILD), Amgen (AMGN), ... have given a positive return and hence increased the ... to select therapy/niche indication where the high treatment cost ...
Breaking Biology Technology:BioLife Solutions to Report Fourth Quarter and Full Year 2014 Financial Results and Provide Business Update on March 12, 2015 2HX360 Announces Sixteen Innovation Challenge Semi-finalists Competing To Deliver Solutions That Improve The Patient Experience 2HX360 Announces Sixteen Innovation Challenge Semi-finalists Competing To Deliver Solutions That Improve The Patient Experience 3HX360 Announces Sixteen Innovation Challenge Semi-finalists Competing To Deliver Solutions That Improve The Patient Experience 4Mature Biotech Outlook 2015: New Therapy Ventures Pave the Way for Success 2Mature Biotech Outlook 2015: New Therapy Ventures Pave the Way for Success 3
... in Primary Hypercholesterolemia ... ... Genzyme Corp.,(Nasdaq: GENZ ) today announced the launch ... Cholestagel is a new, non-absorbed,cholesterol-lowering agent aimed at treating patients ...
... Oct. 23 Arbios Systems, Inc.,(OTC: ABOS) today ... agreement with NxStage Medical, Inc., whereby NxStage will,manufacture ... for use,in treating liver failure. Arbios is currently ... to begin a controlled pivotal clinical,trial for SEPET(TM). ...
... of Murder and a Wrong Should be put ... a Pardon" Giovanni Di Stefano, ROME, October 23 Giovanni ... Dr. Hawley Harvey Crippen. In,a letter supported by Dr John Trestrail ... the Secretary of State for,the pardon to be ,effective forthwith notwithstanding ...
Cached Biology Technology:Genzyme Launches Cholestagel(R) in Europe 2Genzyme Launches Cholestagel(R) in Europe 3Genzyme Launches Cholestagel(R) in Europe 4Genzyme Launches Cholestagel(R) in Europe 5Arbios Announces SEPET(TM) Manufacturing Agreement With NxStage Medical 2Arbios Announces SEPET(TM) Manufacturing Agreement With NxStage Medical 3Arbios Announces SEPET(TM) Manufacturing Agreement With NxStage Medical 4
This modular benchtop fume hood ventilates and purifies chemical fumes, allowing safe indoor release of exhaust. Bonded charcoal filters remove most organic contaminants. Options include final HEPA f...
... Tracker Intracellular Localization Kit with TransIT-siQUEST ... approach to directly label and deliver ... efficient yet non-destructive manner, for in ... functional inhibition of target gene expression ...
... mass numbers as a trigger, precisely isolates ... investigation and research of natural compounds. Key ... preparative operation. Switching between modes is simple ... support provides a quick solution for chemists ...
... Label IT siRNA Tracker Intracellular Localization Kit ... label and deliver siRNA, of your design, ... in vitro tracking experiments. Subcellular localization and ... be monitored following introduction of the labeled ...
Biology Products: