Navigation Links
Marine phytoplankton changes form to protect itself from different predators

as small, solitary cells like these that are only a few micrometers in diameter.

Conducted largely at Georgia Tech’s marine lab in Savannah, Ga., the research was sponsored by the U.S. National Science Foundation and the U.S. Environmental Protection Agency.

Phaeocystis has two primary predators: small grazers such as ciliates, which prefer to eat small solitary cells that are four to six microns in diameter, and the larger shrimp-like copepods, which prefer to eat large, ball-shaped colonies.

When copepods are attacking the phytoplankton, therefore, the best survival strategy of Phaeocystis is to form solitary cells. When ciliates are attacking, the best strategy is to form colonies that are too large for those predators to consume.

Lead author Jeremy D. Long, along with collaborators Gabriella W. Smalley, Todd Barsby, Jon T. Anderson and Mark Hay found that’s just what Phaeocystis does. Chemicals that signaled attacks from copepods suppressed the formation of colonies by 60 to 90 percent, while signals from ciliates enhanced colony formation by more than 25 percent.

The transformations took place over periods of three to six days, and the overall size difference could be dramatic. “When one of these cells changes to the biggest colony form, although it takes a while, it’s like changing from a mosquito to 76 blue whales or 3,000 bull elephants,” Hay explained. “That’s a pretty dramatic difference.”

Defensive responses are often seen in higher plants, but this is believed to be the first report of such a complex and species-specific response in marine phytoplankton. Hay suspects scientists may find other examples of complex defensive strategies when they look more closely at other single-celled organisms.

The response of Phaeocystis could be important to scientists studying climate change because the predator that ultimately consumes the phytoplankton determines the fate of the carb
'"/>

Source:Georgia Institute of Technology Research News


Page: 1 2 3 4

Related biology news :

1. Marine sponge yields nanoscale secrets
2. Census of Marine Life explorers surprised by diversity, density of Arctic creatures
3. Marine bacterium suspected to play role in global carbon and nitrogen cycles
4. Marine conservation organizations team up to conduct Indonesia coral reefs assessment
5. Marine mammals are on the frontline of failing ocean health
6. Marine dead zone off Oregon is spreading
7. Researchers trace evolution to relatively simple genetic changes
8. Plants defy Mendels inheritance laws, may prompt textbook changes
9. Scientists find evidence of catastrophic sand avalanches, sea level changes in Gulf of Mexico
10. Customized gene chip provides rapid detection of genetic changes in childrens cancer
11. New amphibian species result from exploration, not from rule changes
Post Your Comments:
(Date:10/29/2014)... kind of stem cell, those referred to as ,facultative, ... is apparently nothing that differentiates these cells from the ... they retain the capacity to become stem cells again. ... an organ that hosts cells that stimulate tissue growth, ... case of a transplant. Knowledge of the underlying ...
(Date:10/29/2014)... October 27, 2014 — Cambridge, MA and Hebei, China ... the complete, high quality sequencing of the Jujube genome. ... Rhamnaceae family, and the Jujube genome is particularly difficult ... other complicating factors. It is the first time that ... sequenced. This study has been recently published in ...
(Date:10/29/2014)... PA, October 29, 2014 – Ghrelin is a hormone ... food intake. Alcohol is commonly viewed as a psychoactive ... also a highly caloric food. , This knowledge, ... the hypothesis that ghrelin has the potential to stimulate ... tested this in humans and found that, as they ...
Breaking Biology News(10 mins):A mechanism that allows a differentiated cell to reactivate as a stem cell revealed 2BGI Tech and Hebei Agricultural University complete the genome sequencing of the jujube tree 2Ghrelin stimulates an appetite for drinking alcohol 2
... Then it was Jeopardy. Now computers are at ... automate the scientific process itself. An interdisciplinary team ... Research Corporation, Inc., has taken a major step toward ... raw experimental data from a biological system and derive ...
... -- An eight-year study has concluded that increasingly frequent ... have pushed some aquatic desert ecosystems into "catastrophic regime ... The findings, just published in the journal Freshwater ... aquifers for urban water use, and land management may ...
... of Naval Research scientist Dr. Roshdy George S. Barsoum ... for the development of a revolutionary coating material that ... HybridSil Fire/Blast, acts like a force field that surrounds ... ballistic- and fire-resistant. "You can take an existing ...
Cached Biology News:Robot biologist solves complex problem from scratch 2Robot biologist solves complex problem from scratch 3Severe drought, other changes can cause permanent ecosystem disruption 2Severe drought, other changes can cause permanent ecosystem disruption 3Spray-on protective coating wins 'R&D 100' Award 2
(Date:10/30/2014)... Spartan Bioscience announced today that Health Canada ... It detects CYP2C19 genetic mutations in less than 60 ... RX CYP2C19 System is the first near-patient DNA test ... Due to the system’s ease of use, Health Canada ... professionals such as doctors, nurses, pharmacists, and laboratory technicians, ...
(Date:10/30/2014)... Grace Century portfolio project, Provia Laboratories ... of the Board, to the National Stem Cell Ethics ... made by the Ministry of Health on behalf of the ... , More than a year after Bahamian Parliament passed the ... Perry Christie said the government has completed the accompanying regulations ...
(Date:10/30/2014)...  Regado Biosciences, Inc. (Nasdaq: RGDO ), ... and live audio webcast on Thursday, November 6, 2014, ... 2014 financial results. Interested participants and investors ... for domestic callers or (412) 902-4276 for international callers. ... investor relations section of the Regado website at ...
(Date:10/27/2014)... Ryan Carfley , Managing Partner at Personify ... Bryan Hamilton, the publisher of the Triangle Business Journal, and ... Research Triangle region of North Carolina. , Just a few ... include the role of social media in recruitment, recruiting ... the unique role that Millennials play in the workplace today. ...
Breaking Biology Technology:Health Canada approves first near-patient DNA test for personalized medicine 2Health Canada approves first near-patient DNA test for personalized medicine 3Grace Century’s Stem Cell Biobank Project Announces Chairman’s Appointment to National Stem Cell Ethics Committee of The Bahamas 2Grace Century’s Stem Cell Biobank Project Announces Chairman’s Appointment to National Stem Cell Ethics Committee of The Bahamas 3Regado Biosciences to Provide Third Quarter 2014 Financial Results 2Personify's Ryan Carfley Talks Recruiting with Triangle Business Journal, RPG Solutions 2Personify's Ryan Carfley Talks Recruiting with Triangle Business Journal, RPG Solutions 3
... FRANCISCO, Aug. 30 BioSpace, the leading ... along with BayBio unveiled this,morning the 11th ... The,campaign features both a regional promotional Hotbed ... conjunction with the economic and,workforce development initiatives ...
... ICx Technologies, a developer of,advanced technology solutions for ... detection business unit, based in Albuquerque, has been,awarded ... of Homeland Security,(DHS) to continue development of a ... granted the award to commence Phase II activities ...
... PRINCETON, N.J., Aug. 30 Medarex, Inc.,(Nasdaq: MEDX ... at the,Thomas Weisel Partners Healthcare Conference at 11:30 AM ... being held at the Four,Seasons Hotel in Boston, Massachusetts. ... for replay through the Webcast page in,the Investor Relations ...
Cached Biology Technology:BioSpace and BayBio Launch 11th Edition of Biotech Bay(TM) Hotbed Map Campaign 2ICx Awarded $1.5 M Contract by Department of Homeland Security for Development of Next Generation Bio Aerosol Systems 2Medarex to Present at Thomas Weisel Partners Healthcare Conference 2007 2
Cell Culture Flask, 25 cm, tissue-culture treated polystyrene...
MAb to HLA, Class II-DR+DP Dry Ice: No Preservative: NaN3 Availability When Not in Inventory: 14-21 Business Days...
Cell Culture Flask, 25 cm, tissue-culture treated polystyrene...
... Disposable. Virgin, optically clear polystyrene with ... alphanumeric coordinates for cell counting. 100% ... is a new product number, created ... If showing no availability yet, please ...
Biology Products: