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Latest Planktology Stories

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2011-01-21 11:46:44

A team of biologists has discovered an entirely new group of algae living in a wide variety of marine and freshwater environments. This group of algae, which the researchers dubbed "rappemonads," have DNA that is distinctly different from that of other known algae. In fact, humans and mushrooms are more closely related to each other than rappemonads are to some other common algae (such as green algae). Based on their DNA analysis, the researchers believe that they have discovered not just a...

2010-12-17 17:22:24

Rapid turnover and remodelling of lipid membranes could help phytoplankton cope with nutrient scarcity in the open ocean. A team led by Patrick Martin of the National Oceanography Centre has shown that a species of planktonic marine alga can rapidly change the chemical composition of its cell membranes in response to changes in nutrient supply. The findings indicate that the process may be important for nutrient cycling and the population dynamics of phytoplankton in the open ocean. Tiny...

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2010-12-13 11:09:10

A study carried out over 50 years by an international team, with the participation of the Balearic Oceanography Centre of the Spanish Institute of Oceanography (IEO) has confirmed an increase in the size and intensity of proliferations of the jellyfish Pelagia noctiluca. There are several complex reasons for this - over-fishing and the current increase in sea water temperatures. "Since 2002, these organisms have become increasingly frequently found in the north east Atlantic in winter, since...

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2010-12-10 09:53:10

Despite a 30-year warming trend, the last three years in the Bering Sea have been the coldest on record. A University of Alaska Fairbanks scientist says that the cold temperatures have helped produce larger zooplankton in the Bering Sea, which may be changing the way Walleye pollock are feeding. Alexei Pinchuk, research professional at the UAF Seward Marine Center, has spent the last three years gathering zooplankton samples in the Bering Sea. He and his colleagues have been looking at how...

2010-11-11 22:17:03

Findings, which contradict a commonly-proposed approach to reducing global climate change, are published in Proceedings of the Natural Academy of Sciences LSU's Sibel Bargu, along with her former graduate student Ana Garcia, from the Department of Oceanography and Coastal Sciences in LSU's School of the Coast & Environment, has discovered toxic algae in vast, remote regions of the open ocean for the first time. The recent findings were published in the Nov. 8 edition of one of the most...

2010-11-09 11:31:04

A team of marine scientists has found that toxin-producing algae once thought to be limited to coastal waters are also common in the open ocean, where the addition of iron from natural or artificial sources can stimulate rapid growth of the harmful algae. The new findings, reported this week in the Proceedings of the National Academy of Sciences, add to concerns about proposals to use iron fertilization of the oceans as a way to combat global warming. Blooms of diatoms in the genus...

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2010-10-22 08:11:03

A study led by Dr Stuart Painter of the National Oceanography Centre helps explain the formation of huge phytoplankton blooms off the southeast coast of South America during the austral summer (December-January). The region supports the highly productive Patagonian Shelf marine ecosystem, which includes a globally important fishery. Coccolithophores are key members of the marine phytoplankton community. They are abundant in the sunlit upper layer of the world's oceans, often forming vast...

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2010-10-15 09:50:00

A team of Australian scientists has announced that they are looking to create a new, global climate change monitoring network using state of the art technology--and elephant seals. In order to study the oceans surrounding their nation, the scientists are turning to a set of high-tech tools known as the Integrated Marine Observing System (IMOS). Among the tools utilized by the IMOS are autonomous profiling floats that will help detect cracks in sea ice, satellite tags equipped to the...

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2010-10-12 11:47:23

Despite its primitive structure, the North American comb jellyfish can sneak up on its prey like a high-tech stealth submarine, making it a successful predator. Researchers, including one from the University of Gothenburg, have now been able to show how the jellyfish makes itself hydrodynamically 'invisible'. The North American comb jellyfish Mnemiopsis leidyi has long been known to consume vast quantities of zooplankton. A few years ago the species became established in Northern Europe. Like...

2010-10-07 13:40:48

Advocates for seeding regions of the ocean with iron to combat global warming should be interested in a new study published today in Geophysical Research Letters. A Canada-US team led by University of Victoria oceanographer Dr. Roberta Hamme describes how the 2008 eruption of the Kasatochi volcano in the Aleutian Islands spewed iron-laden ash over a large swath of the North Pacific. The result, says Hamme, was an "ocean productivity event of unprecedented magnitude""”the largest...


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...

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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