Quantcast

Latest Planktology Stories

2009-09-02 13:54:25

U.S. government scientists say they've refined their method of detecting contaminants in municipal water supplies by using algae as sentinels. Oak Ridge National Laboratory researchers Elias Greenbaun and Miguel Rodriguez Jr. said their work demonstrates the technology has broader applications than previously reported. For example, they said, the sensitivity of the algae to toxins has a natural daily cycle that tracks the sun. When the sun is overhead and shining brightly, the algae are less...

2009-08-14 10:26:43

Observations made by Southampton scientists help understand the massive blooms of microscopic marine algae "“ phytoplankton "“ in the seas around Madagascar and its effect on the biogeochemistry of the southwest Indian Ocean.The observations were made by researchers based at the National Oceanography Center, Southampton (NOCS) during a 2005 hydrographic survey south and east of Madagascar while aboard the royal research ship RRS Discovery. The fully analyzed results are published...

2009-08-04 10:48:10

Amongst the smallest micro-algae belonging to the group of so-called haptophytes(1) , considerable diversity has recently been demonstrated in our oceans. Scientists from the Marine Biology Laboratory in Roscoff and Oceanographic Laboratory in Villefranche sur Mer (UPMC/CNRS), in collaboration with Rutgers University (USA) and University of Ottawa (Canada), have shown that these photosynthetic microorganisms, highly diversified and extremely abundant, are some of the most important producers...

915eb99a297a3e483da84f0753dd748b1
2009-07-23 09:00:00

For a long time scientists have observed the biological consequences of global climate change. One of the most famous symptoms is the shift of habitats from the equator further north or further south. More recent studies show that not only the habitats but also the size of organisms is affected. Dr. Martin Daufresne of the HYAX Lake Ecosystem Laboratory in Aix-en-Provence, France, as well as Prof. Ulrich Sommer and Dr. Kathrin Lengfellner of the Leibniz-Institute of Marine Sciences...

4daf8ea100c9b6bea631606d1979ee711
2009-07-21 12:55:00

A study published Monday reported that fish have lost half their average body mass and smaller species are making up a larger proportion of European fish stocks as a result of global warming. Martin Daufresne of the Cemagref Public Agricultural and Environmental Research Institute in Lyon, France said, "Size is a fundamental characteristic that is linked to a number of biological functions, such as fecundity - the capacity to reproduce." Smaller fish tend to produce fewer eggs, and they also...

2009-07-09 09:21:18

New evidence for ice-free summers with intermittent winter sea ice in the Arctic Ocean during the Late Cretaceous "“ a period of greenhouse conditions - gives a glimpse of how the Arctic is likely to respond to future global warming.Records of past environmental change in the Arctic should help predict its future behaviour. The Late Cretaceous, the period between 100 and 65 million years ago leading up to the extinction of the dinosaurs, is crucial in this regard because levels of...

2009-07-07 15:20:00

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...

d65d294ca999d753fef6494ce14516b51
2009-06-30 10:45:00

The blooming of toxic algae that occurs during the summer conceal a fight for life and death. Scientists at the University of Gothenburg propose in an article published in the journal PNAS that algal blooms are created when aggressive algae kill and injure their competitors in order to absorb the nutrients they contain."The behaviour of the algae can be compared to that of blood-sucking insects", says Per Jonsson of the Department of Marine Ecology.The blooming of toxic algae in the oceans...

e83a6928e8402c21e74bf9013db81c0e1
2009-06-20 09:10:56

IFM-GEOMAR-biogeochemists feed Saharan dust to enigmatic fertilizer plankton The tropical Atlantic waters around Cape Verde are very low in plant nutrients.  Nitrogen is in especially short supply and limits the growth of the phytoplankton, the tiny plants that are at the basis of the food chain in the ocean. In this area, the nutrients fall out from the sky: Trade winds carry Saharan dust rich in iron and phosphorus which can fertilize the surface of the ocean.  This was one of the...

2009-05-28 12:43:36

Researchers are using the U.S. space agency's Aqua satellite to conduct the first global analysis of the health and productivity of ocean plants. Ocean scientists can now remotely measure the amount of fluorescent red light emitted by phytoplankton and assess how efficiently these microscopic plants turn sunlight and nutrients into food through photosynthesis, the National Aeronautics and Space Administration said. Single-celled phytoplankton fuel nearly all ocean ecosystems and the health of...


Latest Planktology Reference Libraries

45_9dcdfc9da62991a8f200f2f82f8638d9
2014-01-12 00:00:00

A salp is a barrel-shaped, free-floating tunicate (any living organism which has a saclike body enclosed in a thick membrane or tunic with two openings or siphons for the ingress and egress of water). It moves by contracting which pumps water through its body. The salp strains the water with internal feeding filters as it goes through the body. It consumes phytoplankton that are strained from the water. Salps are common throughout equatorial, temperate, and colder seas. They are most often...

39_6e87e3fa1b5a996861bc65cc76c916fa
2007-04-03 00:34:20

The South American pilchard, Sardinops sagax, is a sardine of the Family Clupeidae, the only member of the genus Sardinops, found in the indo-Pacific oceans. Their length is up to 15.75 in (40 cm). It has a number of other common names: Australian pilchard, Blue pilchard, Blue-bait, Californian pilchard, Chilean sardine, Japanese pilchard, Pacific sardine, and Southern African pilchard. The South American pilchard is a coastal species that forms large schools. Coloration is blue green on...

More Articles (2 articles) »
Word of the Day
bellycheer
  • Good cheer; viands.
  • To revel; to feast.
The word 'bellycheer' may come from 'belle cheer', "good cheer".
Related