Navigation Links
Variable light illuminates the distribution of picophytoplankton
Date:12/18/2007

Tiny photosynthetic plankton less than a millionth of a millimeter in diameter numerically dominate marine phytoplankton. Their photosynthesis uses light to drive carbon dioxide uptake, fueling the marine food web over vast areas of the oceans. A new study published in this weeks PLoS ONE by post-doctoral researcher Dr Christophe Six and a team of scientists from MountAllison University, Sackville, New Brunswick, Canada, illuminates how the environment regulates the distributions of these ecologically important species.

Dr Doug Campbell, Canadian Research Chair in Environmental Processes and co-author explains, "Phytoplankton are entrained in the water column and are thus subject to rapid changes in light as they mix through the upper layer of the ocean."

Dr Christophe Six adds, Phytoplankton need light for photosynthesis and survival, but surprisingly this light also inactivates a key component of the photosynthetic apparatus, photosystem II. This Photoinactivation of photosystem II decreases photosynthesis and can even kill cells, unless they can counteract the damage through repair, which requires nutrients.

We found the picophytoplankton species isolated from different regions of the ocean have different abilities for this repair, and therefore have different abilities to tolerate increases in light. Their repair capacities are consistent with the different light and nutrient regimes in their local environments; species from deep ocean regions with stable light and low nutrients have very limited repair capacity, but species from coastal regions with more variable light and higher nutrients are more able to cope with variable light through rapid repair.

This result indicates that picophytoplankton species tolerance of exposures to high light can help to explain how these organisms are distributed throughout the ocean. The group measures the rates of photoinactivation and the rates of the counteracting repair in a wide variety of phytoplankton species, and next plans to contribute to ocean models to predict phytoplankton carbon cycling in response to future climate change.


'/>"/>

Contact: Doug Campbell
dcampbell@mta.ca
Public Library of Science
Source:Eurekalert

Related biology news :

1. Clemson scientists shed light on molecules in living cells
2. September Geology and GSA Today media highlights
3. Highlights from the September 2007 Journal of the American Dietetic Association
4. Genome study shines light on genetic link to height
5. Pig study sheds new light on the colonisation of Europe by early farmers
6. Researchers developing device to predict proper light exposure for human health
7. AGU journal highlights -- Sept. 6, 2007
8. IDEMA Reveals Program Highlights for DISKCON USA 2007
9. Men shed light on the mystery of human longevity, study finds
10. Zebrafish to shed light on human mitochondrial diseases
11. UT researcher sheds new light on hybrid animals
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/11/2017)... Apr. 11, 2017 Research and Markets has ... report to their offering. ... The global eye tracking market to grow at a CAGR of ... Eye Tracking Market 2017-2021, has been prepared based on an in-depth ... market landscape and its growth prospects over the coming years. The ...
(Date:4/5/2017)... , April 5, 2017 Today ... announcing that the server component of the HYPR platform ... for providing the end-to-end security architecture that empowers biometric ... HYPR has already secured over 15 million users ... including manufacturers of connected home product suites and physical ...
(Date:3/30/2017)... The research team of The Hong Kong ... identification by adopting ground breaking 3D fingerprint minutiae recovery and matching ... and accuracy for use in identification, crime investigation, immigration control, security ... ... A research team led by ...
Breaking Biology News(10 mins):
(Date:5/26/2017)... ... May 25, 2017 , ... Throughout this webinar, participants ... how process development and economic goals were achieved in both industry and academic ... bioreactor system, along with techniques for scaling production of mesenchymal stem cells (MSCs) ...
(Date:5/24/2017)... LITTLETON, MA. (PRWEB) , ... ... ... Incorporated, the Northeast's premier provider of high quality relocatable and permanent modular ... space combines visual management tools and modern office design characteristics to help ...
(Date:5/23/2017)... ... , ... A recent survey conducted by the Weed Science Society of America ... 12 categories of broadleaf crops, fruits and vegetables, while common lambsquarters ranks as the ... participated in the 2016 survey, the second conducted by WSSA. A 2015 baseline ...
(Date:5/23/2017)... PARK, CA (PRWEB) , ... May 23, 2017 , ... ... the publication of “Label-free isolation of prostate circulating tumor cells using Vortex microfluidic ... is the result of a collaboration with Dr. Dino Di Carlo and Dr. Matthew ...
Breaking Biology Technology: