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Latest Planktology Stories

2010-01-17 08:35:00

An increase in the variability of local conditions could do more to harm biodiversity than slower shifts in climate, a new study has found. Climate scientists predict more frequent storms, droughts, floods and heat waves as the Earth warms. Although extreme weather would seem to challenge ecosystems, the effect of fluctuating conditions on biodiversity actually could go either way. Species able to tolerate only a narrow range of temperatures, for example, may be eliminated, but instability in...

2009-11-03 18:40:00

One of the main objectives of marine biology is to understand the trophic food chains involving microbian plankton. That is, to study the sequence of organisms in relation to their nutrition, given that live organisms can be classified from the perspective of nutrition. In this classification each organism is at one level and all these levels are united one to the other, forming a chain. In this succession of stages or levels an organism feeds itself and is devoured. The structure of this...

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2009-11-24 08:25:00

What constitutes fish food is a matter of debate. A high-profile study a few years ago suggested that fish get almost 50 percent of their carbon from trees and leaves, evidence for a very close link between the terrestrial and aquatic ecosystems. But new research from the University of Washington shows this is not likely to be true. Algae provide a much richer diet for fish and other aquatic life, according to research published this week in the Proceedings of the National Academy of...

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2009-11-10 10:35:24

Drifters designed to provide new knowledge about marine protected areas, harmful algal blooms, oil spills In an effort to plug gaps in knowledge about key ocean processes, the National Science Foundation (NSF)'s division of ocean sciences has awarded nearly $1 million to scientists at the Scripps Institution of Oceanography in La Jolla, Calif. The Scripps marine scientists will develop a new breed of ocean-probing instruments. Jules Jaffe and Peter Franks will spearhead an effort to design...

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2009-11-09 09:19:14

A chemical culprit responsible for the rapid, mysterious death of phytoplankton in the North Atlantic Ocean has been found by collaborating scientists at Rutgers University and the Woods Hole Oceanographic Institution (WHOI).  This same chemical may hold unexpected promise in cancer research. The team discovered a previously unknown lipid, or fatty compound, in a virus that has been attacking and killing Emiliania huxleyi, a phytoplankton that plays a major role in the global carbon...

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2009-10-19 14:18:14

Eutrophication of the seas may have an impact on genetic variation in algae, research at the University of Gothenburg shows. Phytoplankton provide the basis for the whole marine food chain. These microscopic organisms are common in coastal areas, all the way from the polar regions to the Equator, and multiply through cell division. If cells are present in the water mass in large numbers an algal blood develops - a recurrent problem in Swedish seas and along Swedish coasts. Causes of algal...

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...

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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...


Latest Planktology Reference Libraries

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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...

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Word of the Day
cock-a-hoop
  • Exultant; jubilant; triumphant; on the high horse.
  • Tipsy; slightly intoxicated.
This word may come from the phrase 'to set cock on hoop,' or 'to drink festively.' Its origin otherwise is unclear. A theory, according to the Word Detective, is that it's a 'transliteration of the French phrase 'coq a huppe,' meaning a rooster displaying its crest ('huppe') in a pose of proud defiance.' Therefore, 'cock-a-hoop' would 'liken a drunken man to a boastful and aggressive rooster.'
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