Navigation Links
Iron and biological production in the high-latitude North Atlantic
Date:7/7/2009

Southampton scientists have demonstrated an unexpected role of iron in regulating biological production in the high-latitude North Atlantic. Their findings have important implications for our understanding of ocean-climate interactions.

Tiny plant-like organisms called phytoplankton dominate biological production in the sunlit surface waters of the world's oceans and, through the process of photosynthesis, sequester large amounts of atmospheric carbon dioxide. A proportion of the carbon is exported to the deep ocean, and because carbon dioxide is a greenhouse gas, this so-called 'biological carbon pump' helps prevent runaway global climate warming.

Iron is an essential micro nutrient for phytoplankton growth. In high-nutrient, low-chlorophyll (HNLC) oceanic regions, phytoplankton growth is limited by low iron availability. Classical HNLC regions, which account for about a third of the world's oceans, include the Southern Ocean and the subpolar North Pacific.

In contrast, it has been widely assumed that iron supply does not limit biological production of the high-latitude (>50 degrees N) North Atlantic Ocean. Here, winter cooling causes the sinking of nutrient-depleted surface waters and their replacement by deep nutrient-rich water. This winter 'overturning' replenishes surface water nutrients, and in the spring, when light intensities increase, a large phytoplankton bloom develops, leading to high rates of carbon export.

However, in many regions of the open North Atlantic, including the Iceland and Irminger Basins, residual amounts of nitrate persist into the summer period, after the spring bloom has ceased. This represents an inefficiency of the biological carbon pump that is potentially of global significance to the partitioning of carbon between the atmosphere and ocean.

Phytoplankton are grazed upon and some of the larger phytoplankton species such as diatoms with low grazing mortality are susceptible to sili
'/>"/>

Contact: Rory Howlett
r.howlett@noc.soton.ac.uk
44-023-805-98490
National Oceanography Centre, Southampton (UK)
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Keck Foundation funds study of biological interactions with nanomaterials
2. New insight into the mechanisms of voltage sensing and transduction in biological processes
3. Biological warfare: What do you need to know?
4. A mechanism to explain biological cross-talk between 24-hour body cycle and metabolism
5. Story ideas from the Journal of Biological Chemistry
6. Emerging field of neuroecology is showcased in December issue of the Biological Bulletin
7. Story ideas from the Journal of Biological Chemistry
8. Systems biologist finds novel solutions to fundamental biological problems
9. MIT applies engineering approach to studying biological pathways
10. Lensless camera uses X-rays to view nanoscale materials and biological specimens
11. Systems biology approach identifies nutrient regulation of biological clock in plants
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:11/21/2014)... REDMOND, Wash. , Nov. 20, 2014 ... access for the Internet of Things (IoT), today announced ... position of chief operating officer. Previously a strategic advisor ... marketing, finance, and operations. Mr. Traynor is based out ... . He reports to Chris Muench , ...
(Date:11/18/2014)...   News Highlights: ... The Partners Data Lake, an agile data and ... will allow researcher and clinicians to explore and ... lives of patients , The Partners Data ... the Partners system, breaking down physical barriers for ...
(Date:11/15/2014)...  While we may still be a few years away ... Trek" to gain instant access to all that ailed his ... and tablets for monitoring and measuring our health are cropping ... seem a tad Orwellian to some, but a new survey ... technological opportunities into their healthcare regime. These are ...
Breaking Biology News(10 mins):C-Labs Names Former Microsoft and Bsquare Executive as Chief Operating Officer 2Partners HealthCare and EMC Unite to Solve Health Care's Toughest Challenges Using Big Data 2Partners HealthCare and EMC Unite to Solve Health Care's Toughest Challenges Using Big Data 3Partners HealthCare and EMC Unite to Solve Health Care's Toughest Challenges Using Big Data 4Partners HealthCare and EMC Unite to Solve Health Care's Toughest Challenges Using Big Data 5Americans May Be Ready for a Brave New World of Healthcare 2Americans May Be Ready for a Brave New World of Healthcare 3Americans May Be Ready for a Brave New World of Healthcare 4
... of Velociraptor rewrites evolutionary charts , The recent ... that dromaeosaurs, a group of carnivorous theropods that ... originated much earlier than previously thought. Rather than ... traced back to the Jurassic, possibly as far ...
... a pheromone emitted by older male elephants in musth influences ... surrounding elephants behave, a new study has found. , ... University of Auckland in New Zealand say the release of ... frontalin, depends on whether the male elephant is mature enough ...
... immune system to absorb and digest pathogenic intruders. Some ... multiply within the macrophages. Cell biologists at the University ... recently publication in the journal 'Traffic' (Vol. 6, No. ... pathogens escape the 'stomach' of the macrophages which might ...
Cached Biology News:Newly discovered birdlike dinosaur is oldest raptor ever found in South America 2Newly discovered birdlike dinosaur is oldest raptor ever found in South America 3Newly discovered birdlike dinosaur is oldest raptor ever found in South America 4Male elephants woo females with precise chemistry 2Male elephants woo females with precise chemistry 3Dangerous tricksters: Some bacterie use immune cells to reproduce 2Dangerous tricksters: Some bacterie use immune cells to reproduce 3
(Date:11/21/2014)... BELLINGHAM, Washington, USA (PRWEB) November 19, 2014 ... used in our lives was shared with more than ... undergraduate and postgraduate students from the University of Otago ... Outreach Grant . The Otago students, members of the ... Southland New Zealand in early September, giving children from ...
(Date:11/21/2014)... (PRWEB) November 20, 2014 The November ... available as an open access journal featuring the following ... fluorescent proteins to preserve photoresponsiveness in the retina , ... fluorescent in situ hybridization using chromogenic substrates in zebrafish ... DNA, RNA, and protein electrophoresis , Nuclear ...
(Date:11/21/2014)... , Nov. 20, 2014 Polaris Group ... dosed in its Phase 1 trial of ADI-PEG ... the treatment of malignant pleural mesothelioma (MPM) and ... conducting clinical trials on ADI-PEG 20, both as ... the treatment of several other indications, including breast ...
(Date:11/18/2014)... RPS Diagnostics (RPS®) – a ... announces its third annual partnership of the Centers ... About Antibiotics Week from November 17-23. , Get ... designed to highlight the coordinated efforts of CDC, ... for-profit partners to provide education about the importance ...
Breaking Biology Technology:Optics and photonics outreach programs share science, spark fascination with light 2Optics and photonics outreach programs share science, spark fascination with light 3BioTechniques: The International Journal of Life Science Methods Announces the Publication of the November 2014 Issue—Available in Print and Online 2BioTechniques: The International Journal of Life Science Methods Announces the Publication of the November 2014 Issue—Available in Print and Online 3Polaris Group Announces Treatment of First Patient in Phase 1 Study of ADI-PEG 20 plus Pemetrexed and Cisplatin in Malignant Pleural Mesothelioma And Non-Squamous Non-Small Cell Lung Carcinoma 2RPS Again Partners with the CDC in Support of the 2014 Get Smart About Antibiotics Week 2RPS Again Partners with the CDC in Support of the 2014 Get Smart About Antibiotics Week 3
... Olympus has further,cemented its position as a leader ... exclusive and immediate deal to distribute the products of,Irish ... global,provider of ports for state-of-the-art laparoscopic operative techniques via,a ... now the exclusive,distributor for the full range of products ...
... 11 Peregrine Pharmaceuticals, Inc. (Nasdaq: PPHM ) today ... Directors, unexpectedly passed away on Wednesday. Dr. Waltz had been ... At the time of his death, Dr. Waltz served on ... , "The sudden loss of our ...
... Inc. ("Oncolytics") (TSX:ONC, NASDAQ: ONCY ) announced ... endpoint in its multi-centre Phase 2 clinical trial ... patients with various sarcomas that have metastasized to ... patients on study with significant, durable, clinically meaningful ...
Cached Biology Technology:Minimally Invasive Surgery: Olympus Further Enhances Credentials by Entering Into Exclusive Sales and Distribution Partnership With Market and Technology Leader Advanced Surgical Concepts 2Peregrine Pharmaceuticals Mourns Loss of Chairman Thomas A. Waltz 2Oncolytics Biotech Inc.'s REOLYSIN(R) Exceeds Primary Statistical Endpoint in U.S. Phase 2 Sarcoma Study 2Oncolytics Biotech Inc.'s REOLYSIN(R) Exceeds Primary Statistical Endpoint in U.S. Phase 2 Sarcoma Study 3Oncolytics Biotech Inc.'s REOLYSIN(R) Exceeds Primary Statistical Endpoint in U.S. Phase 2 Sarcoma Study 4
Fingerprinting II Basic software is used for analyzing fingerprint sample types (electrophoretic gels, HPLC and other chromatographic patterns, spectrophotometric and densitometric curves)....
...
Fingerprinting II cluster analysis is an optional module that adds dendrogram and phylogenetic tree construction, cluster and group significance, and congruence of techniques functions to the Fingerp...
... Ion Channel Cell Lines ,High Quality, Functionally-Validated, ... are well known for having a critical ... consequently have a key function in pain, ... ion channels have been investigated in therapeutic ...
Biology Products: