HOME >> BIOLOGY >> NEWS
Satellites see big changes since 1980s in key element of ocean's food chain

Since the early 1980s, ocean phytoplankton concentrations that drive the marine food chain have declined substantially in many areas of open water in Northern oceans, according to a comparison of two datasets taken from satellites. At the same time, phytoplankton levels in open water areas near the equator have increased significantly. Since phytoplankton are especially concentrated in the North, the study found an overall annual decrease in phytoplankton globally.

The authors of the study, Watson Gregg, of NASA's Goddard Space Flight Center, Greenbelt, Md., and Margarita Conkright, a scientist at the National Oceanic and Atmospheric Administration's (NOAA) National Oceanographic Data Center, Silver Spring, Md., also discovered what appears to be an association between more recent regional climate changes, such as higher sea surface temperatures and reductions in surface winds, and areas where phytoplankton levels have dropped.

Phytoplankton consist of many diverse species of microscopic free-floating marine plants that serve as food to other ocean-living forms of life. "The whole marine food chain depends on the health and productivity of the phytoplankton," Gregg said.

The researchers compared two sets of satellite data -- one from 1979 to 1986 and the other from 1997 to 2000 -- that measured global ocean chlorophyll, the green pigment in plants that absorbs the Sun's rays for energy during photosynthesis. The earlier dataset came from the Coastal Zone Color Scanner (CZCS) aboard NASA's Nimbus-7 satellite, while the latter dataset was from the Sea-Viewing Wide Field of View Sensor (SeaWiFS) on the OrbView-2 satellite.

The researchers re-analyzed the CZCS data with the same processing methods used for the SeaWiFS data, and then blended both satellite measurements with surface observations of chlorophyll from ocean buoys and research vessels over
'"/>

Contact: David E. Steitz
202-358-1730
NASA/Goddard Space Flight Center
8-Aug-2002


Page: 1 2 3

Related biology news :

1. Satellites are tracing Europes forest fire scars
2. Satellites map volcanic home of Africas endangered gorillas
3. Satellites spy deaths in rain forests (Clark et al.)
4. Satellites will join search for source of Ebola virus
5. Satellites to focus on UNESCO World Heritage sites
6. Satellites tracking climate changes
7. Satellites vs. mosquitoes: Tracking West Nile Virus in the U.S.
8. Fatal attraction: Satellites to determine sea lions deaths
9. Adaptive changes in the genome may provide insight into the genetics of complex disease
10. Gene changes linked to increased eye pressure may have implications for glaucoma therapy
11. Study finds plant enzyme function changes with location in cell

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


(Date:8/17/2018)... (PRWEB) , ... August 16, ... ... acquisition of NXT-Dx, an established epigenetics service provider based in Gent, Belgium. ... of targeted DNA methylation assays using pyrosequencing or Next-Generation Sequencing and Illumina’s ...
(Date:8/17/2018)... ... 2018 , ... Cryo-Cell International, Inc. (OTC:QB Markets Group Symbol: ... store stem cells in 1992, announced that Arthur Ellis, JD, Board President of ... Managing Partner IsZo Capital, have joined the Company’s Board of Directors. , Arthur ...
(Date:8/14/2018)... ... August 13, 2018 , ... ... and explore opportunities with multiple health systems at once. However, healthcare professionals often ... offer another, more efficient option for healthcare providers who wish to explore opportunities ...
Breaking Biology News(10 mins):
(Date:9/7/2018)... , ... September 06, 2018 , ... ... fatal neuromuscular disease, has been validated to be as effective as manual pathology. ... Dystrophin Staining in Frozen Muscle Biopsies,” was published in the Archives of Pathology ...
(Date:8/31/2018)... ... August 30, 2018 , ... Small, wireless and networked describes more than the ... connected, too. Draper’s latest system is tiny in size, but is poised to make ... in the new implant design is the growing awareness that disease often involves complex ...
(Date:8/29/2018)... ... August 28, 2018 , ... ... the results of a safety study performed on an allogeneic (donor derived) stem ... Regenerative Medicine Association (NAVRMA) conference in September. He is also the organizer ...
(Date:8/26/2018)... ... August 24, 2018 , ... ExoCoBio Inc., based ... relieves atopic dermatitis and inhibits a variety of inflammatory targets in the journal ... symptoms of mice having severe atopic dermatitis were significantly improved after administration of ...
Breaking Biology Technology:
Cached News: