Navigation Links
Temperature constancy appears key to tropical biodiversity
Date:7/20/2010

CAMBRIDGE, Mass., July 20, 2010 -- The tropics owe their stunning biodiversity to consistent year-round temperatures, not higher temperatures or more sunlight, according to a novel survey of insect diversity at different latitudes and at different points in the planet's history.

The finding, presented this week in the journal Paleobiology by researchers from Harvard University, Simon Fraser University, and Brandon University, may finally answer a question that has dogged scientists for centuries.

It also suggests, intriguingly, that the world is likely far less diverse today than it was tens of millions of years ago, when the entire Earth had consistent year-round temperatures, much like the modern tropics.

"The latitudinal diversity gradient has been recognized for 150 years as one of the most general observations in nature, and has produced more explanatory hypotheses than nearly any other observation," says co-author Brian D. Farrell, professor of biology at Harvard. "We show that when most of today's organisms were diversifying, up through the Eocene, the world lacked pronounced seasonality, more like today's tropics, even in areas where the temperature was low."

"It appears it's not the heat of the tropics that promotes diversity; it's the newer seasons of the temperate zone that depress diversity."

Scientists' explanations for tropical biodiversity have tended to focus on the greater heat and light found closer to the equator, and to a lesser extent the low seasonality of the tropics, where average temperature in the hottest and coolest months may vary by only a few degrees.

"These factors tend to change together as you travel away from the equator toward the poles, leaving it difficult to separate their individual effects on diversity," says lead author S. Bruce Archibald, a research associate at Simon Fraser University, Harvard's Museum of Comparative Zoology, and the Royal British Columbia Mu
'/>"/>

Contact: Steve Bradt
steve_bradt@harvard.edu
617-496-8070
Harvard University
Source:Eurekalert

Page: 1 2

Related biology news :

1. Turtles alter nesting dates due to temperature change says ISU researcher
2. Purdue study suggests warmer temperatures could lead to a boom in corn pests
3. Plants take a hike as temperatures rise
4. Making a point: Picoscale stability in a room-temperature AFM
5. Elevated water temperature and acidity boost growth of key sea star species: UBC researchers
6. Highest ever winter water temperatures recorded
7. NIST calculations may improve temperature measures for microfluidics
8. River flow and temperature limit trout numbers
9. ATP is a key to feel warm temperature
10. North Atlantic fish populations shifting as ocean temperatures warm
11. How plants feel the temperature rise
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/11/2014)... brains of all vertebrates, information is transmitted through ... chemical signal to be passed from one brain ... most abundant type of synapse, can be either ... learning, memory, perception and cognition, and the balance ... function. For instance, every time we learn ...
(Date:7/10/2014)... , July 1, 2014 Smart ... way for convenience and improved security: NXT-ID, Inc. (OTCBB: NXTD), ... GOOG ), Apple Inc. (NASDAQ: AAPL ... Corporation (NYSE: MA) NXT-ID, Inc., (OTCQB: NXTD) a biometric ... to announce that the second series of 30 second spots ...
(Date:7/10/2014)... Research and Markets ( http://www.researchandmarkets.com/research/h7h8lq/gesture ) ... Gesture Recognition & Touch-Less Sensing (2D, 3D, Ultrasonic, ... report to their offering ... Touch-Less Sensing Market to Grow Exponentially. Touch-less sensing ... the companies were unable to leverage this technology ...
Breaking Biology News(10 mins):Blame it on the astrocytes 2Advantages for Digital Wallets Eliminate Need to Carry Credit Cards - Large Scale CNBC Ad Campaign for Latest Smart Wallet to Commence July 7th 2Advantages for Digital Wallets Eliminate Need to Carry Credit Cards - Large Scale CNBC Ad Campaign for Latest Smart Wallet to Commence July 7th 3Advantages for Digital Wallets Eliminate Need to Carry Credit Cards - Large Scale CNBC Ad Campaign for Latest Smart Wallet to Commence July 7th 4Advantages for Digital Wallets Eliminate Need to Carry Credit Cards - Large Scale CNBC Ad Campaign for Latest Smart Wallet to Commence July 7th 5Global Gesture Recognition & Touch-Less Sensing (2D, 3D, Ultrasonic, IR, Capacitive) Market - Forecasts to 2020 2
... change the world has seen in the last 100,000 years ... interglacial period. New research from the Niels Bohr Institute at ... the rise in temperature and the rise in the atmospheric ... time. The results have been published in the scientific journal, ...
... new study finds that mice have a distinct neural ... is associated with instinctually important smells such as those ... in Proceedings of the National Academy of Sciences ... have specially hardwired neural circuitry to trigger instinctive behavior ...
... breeders announced a new high-yielding variety of oats. ... height, withstands falling over (lodging), matures earlier and produces ... seed yield potential, exceeding the Rodgers variety by 20 ... 32.2-pound bushel compared to 31.9-pound bushel for Rodgers," said ...
Cached Biology News:Rise in temperatures and CO2 follow each other closely in climate change 2Rise in temperatures and CO2 follow each other closely in climate change 3Mice have distinct subsystem to handle smell associated with fear 2Mice have distinct subsystem to handle smell associated with fear 3Clemson plant breeders roll out new oat variety 2
(Date:7/10/2014)... Calabasas, CA (PRWEB) July 10, 2014 ... academic institutions and professional associations, addressed the challenges of ... & Medical Device Industries” through strategic sourcing. Describing the ... ) with the Supply Chain Management Institute ( SCMI) ... the event on June 24 at the Kroc Institute ...
(Date:7/10/2014)... 10, 2014 /PRNewswire-iReach/ -- Tute Genomics, the ... announced an agreement with Lineagen, Inc., to ... NextStep Dx PLUS.  Lineagen, focused on ... disorders, currently offers FirstStep Dx PLUS, ... used by healthcare providers as a first-line ...
(Date:7/10/2014)... help in the fight against terrorism with the creation ... explosives with the use of light and special glass ... Actuators B: Chemical , the researchers describe a novel ... as low as 6.3 ppm (parts per million). It ... , "Traditionally explosives detection has involved looking for metals ...
(Date:7/10/2014)... fractional quantum Hall effect in bilayer graphene and shown ... by an electric field. , The fractional quantum ... thin sheets are exposed to large magnetic fields, is ... individual electrons behave as a single system. However, while ... many details of this collective behavior remain not well ...
Breaking Biology Technology:Biotech & Biopharm Supply Chain Management Executives Launch BSMA in San Diego 2Biotech & Biopharm Supply Chain Management Executives Launch BSMA in San Diego 3Biotech & Biopharm Supply Chain Management Executives Launch BSMA in San Diego 4Tute Genomics Platform Selected to Provide Clinical Interpretation for Lineagen's NextStepDx PLUS Next-Generation Sequencing-Based Diagnostic Test 2Tute Genomics Platform Selected to Provide Clinical Interpretation for Lineagen's NextStepDx PLUS Next-Generation Sequencing-Based Diagnostic Test 3Tute Genomics Platform Selected to Provide Clinical Interpretation for Lineagen's NextStepDx PLUS Next-Generation Sequencing-Based Diagnostic Test 4Detecting trace amounts of explosives with light 2Columbia researchers observe tunable quantum behavior in bilayer graphene 2Columbia researchers observe tunable quantum behavior in bilayer graphene 3
... New Research Base and First Molecule Discovered by ... Leading global biopharmaceutical company, Ferring Pharmaceuticals, and ... new and expanded, 38,000-square-foot facility located in Sorrento ... further development of peptide research and therapeutics. ...
... CITY, China, Feb. 11 /PRNewswire-Asia-FirstCall/ -- ... CBPO) (,China Biologic, or the,Company,), one ... in the,People,s Republic of China (,PRC,), ... subsidiary, Shandong Taibang Biological Products Co.,Ltd. ...
... Md., Feb. 11 Vanda Pharmaceuticals Inc. (Nasdaq: ... development and commercialization of clinical-stage product candidates for central ... for the fourth quarter ended December 31, 2008. ... the fourth quarter of 2008, compared to $10.9 million ...
Cached Biology Technology:Global Biopharmaceutical Leader in Peptide Research Expands Commitment in San Diego/U.S. With New R&D Facility and Ready-To-Market Prostate Cancer Treatment Degarelix 2Global Biopharmaceutical Leader in Peptide Research Expands Commitment in San Diego/U.S. With New R&D Facility and Ready-To-Market Prostate Cancer Treatment Degarelix 3Global Biopharmaceutical Leader in Peptide Research Expands Commitment in San Diego/U.S. With New R&D Facility and Ready-To-Market Prostate Cancer Treatment Degarelix 4China Biologic Products Receives High-Technology Enterprise Certification to Qualify for Preferential Income Tax Rate 2China Biologic Products Receives High-Technology Enterprise Certification to Qualify for Preferential Income Tax Rate 3Vanda Pharmaceuticals Reports Fourth Quarter and Full Year 2008 Results 2Vanda Pharmaceuticals Reports Fourth Quarter and Full Year 2008 Results 3Vanda Pharmaceuticals Reports Fourth Quarter and Full Year 2008 Results 4Vanda Pharmaceuticals Reports Fourth Quarter and Full Year 2008 Results 5Vanda Pharmaceuticals Reports Fourth Quarter and Full Year 2008 Results 6Vanda Pharmaceuticals Reports Fourth Quarter and Full Year 2008 Results 7Vanda Pharmaceuticals Reports Fourth Quarter and Full Year 2008 Results 8Vanda Pharmaceuticals Reports Fourth Quarter and Full Year 2008 Results 9Vanda Pharmaceuticals Reports Fourth Quarter and Full Year 2008 Results 10
PlusOne Acrylamide PAGE, 1 kg. Category: Electrophoresis Systems & Standards & Reagents, Electrophoresis Standards and Reagents, Gel Casting Chemicals....
Mouse Aminopeptidase P2/XPNPEP2 Affinity Purified PAb Protein Family: Aminopeptidases, Metalloproteases...
... is extensively scrutinized, including negative ... All horses are of U.S. ... are controlled and documented to ... Pricing: $12/unit for ...
Mouse Aminopeptidase P2/XPNPEP2 Biotinylated Aff Pur PAb Keywords: AminopeptidaseP2, Metalloproteinase, Metalloprotease, X-Prolyl Aminopeptidase 2, X-Pro Aminopeptidase 2, Membrane-bound Prote...
Biology Products: