Navigation Links
Scientist's persistence sheds light on marine science riddle

When he started compiling an online database of seashells 15 years ago, Dr. Gary Rosenberg did not envision that his meticulous record-keeping would eventually shed light on a 40-year-old evolutionary debate.

The debate involves the mechanism underlying the island rule: that small animals isolated on islands evolve to be larger than their mainland relatives, and large animals evolve to be smaller. In a paper to be published in September in the Journal of Biogeography, "The Island Rule and the Evolution of Body Size in the Deep Sea," Rosenberg and his co-authors apply the island rule to deep-sea animals using Rosenberg's detailed database of marine snails. They find a similar pattern: when species colonize the deep sea, large-bodied species become smaller and small-bodied species become larger.

"I've been building the Malacolog database for many years as a tool for research, summarizing information on the names and distributions of species of mollusks, but I had not anticipated asking this particular evolutionary question," said Rosenberg, Vice President for the Center for Systematic Biology and Evolution at The Academy of Natural Sciences, Philadelphia's natural history museum. "That means that the data entered in the system could not have been subconsciously biased toward this result. I hope there will be many more surprising results in the years to come." The database Malacolog (www.data.acnatsci.org/wasp) documents species of mollusks in the Western Atlantic, from Greenland to Antarctica.

Scientists have suggested several explanations for the evolution of body size in animals isolated on islands: reduced area, fewer predators, less competition, and resource limitation. "Only resource limitation clearly applies to deep-sea animals," said Rosenberg. "We know there is less food available in the deep sea than in shallow water, but the area of the deep sea is much larger. Also, the competitors a nd predators of a species often don't reach an island, but competition and predation in the deep sea can be intense. A lot more study needs to be done on the relative importance of these factors, but clearly resource limitation is a key factor in the evolution of size."
'"/>

Source:The Academy of Natural Sciences


Related biology news :

1. Bacteria collection sheds light on urinary tract infections
2. Sea skate experiment sheds light on human cell transport
3. Bacterial genome sheds light on synthesizing cancer-fighting compounds
4. Newly discovered genetic disease sheds light on bodys water balance
5. Multi-species genome comparison sheds new light on evolutionary processes, cancer mutations
6. Gene discovery sheds light on causes of rare disease, cancer
7. Skull study sheds light on dinosaur diversity
8. OHSU discovery sheds light into how stem cells become brain cells
9. Clock molecules sensitivity to lithium sheds light on bipolar disorder
10. Lizard third eye sheds light on evolution of color vision
11. Newly identified protein complex sheds light on axon growth mechanism

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


(Date:1/6/2017)... , Jan. 5, 2017  SomaLogic announced ... "Digital Life Alliance" established by iCarbonX, the ... to build a "Global Digital Health Ecosystem that ... a combination of individual,s biological, behavioral and psychological ... agreement between the companies, SomaLogic will provide proteomics ...
(Date:1/3/2017)... LAS VEGAS , Jan. 3, 2017 ... announced the introduction of Onitor Track, an innovative biometric ... and men, showcasing this month at the 2017 Consumer ... . In the U.S., the World ... affect more than two-thirds of adults who are overweight ...
(Date:12/20/2016)... and GENEVA, Dec, 20, 2016   Valencell ... sensor technology, and STMicroelectronics (NYSE: STM), a ... of electronics applications, announced today the launch of ... for biometric wearables that includes ST,s compact ... Valencell,s Benchmark™ biometric sensor system. Together, SensorTile ...
Breaking Biology News(10 mins):
(Date:1/18/2017)... ... January 18, 2017 , ... Announced in December ... Institutes (MII). U.S. Secretary of Commerce Penny Pritzker has announced the award of ... of Defense has announced the award of a new Advanced Regenerative Manufacturing Institute ...
(Date:1/18/2017)... ... January 18, 2017 , ... DrugDev ... for Clinical Ops Executives (Hyatt Regency Miami, January 24-26). DrugDev will join customers ... research issues such as trial performance metrics, patient enrollment diversity, protocol optimization, and ...
(Date:1/18/2017)... ... January 18, 2017 , ... Thirty-six startup companies in University City and Center ... of Community and Economic Development in 2016 as part of the Keystone Innovation Zone ... Keystone Innovation Zone and represent the highest number of awards to the largest number ...
(Date:1/18/2017)... 2017  Caris Life Sciences, a leading innovator ... largest private funder of pancreatic cancer research, are ... impact of immunotherapy in the treatment of pancreatic ... to identify potential trial candidates based on biomarker ... and study investigators. The Lustgarten Foundation is a ...
Breaking Biology Technology: