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Sea lettuce
Answer for the clue "Sea lettuce ", 4 letters:
ulva
Alternative clues for the word ulva
Word definitions for ulva in dictionaries
The Collaborative International Dictionary
Word definitions in The Collaborative International Dictionary
Ulva \Ul"va\, n. [L., sedge.] (Bot.) A genus of thin papery bright green seaweeds including the kinds called sea lettuce.
Wikipedia
Word definitions in Wikipedia
Ulva (, ) is an island in the Inner Hebrides of Scotland, off the west coast of Mull . It is separated from Mull by a narrow strait , and connected to the neighbouring island of Gometra by a bridge. Much of the island is formed from Cenozoic basalt rocks, ...
Usage examples of ulva.
The annual fluctuation in natural phytoplankton density appeared to be very slight, providing a good set of parameters to begin studying the curious interaction between Ulva morina and Thiouni.
Junko tinkered with the new computer long into the evening while Garner continued his experiments using the Ulva culture and the Thiobacillus collected by Medusa.
Bedford Institute of Oceanography just across town here but I think Ulva morina will be your best and only bet.
As I mentioned, one of my graduate students was describing Ulva morina and its epiphytes.
As the researchers watched, the Ulva cells, seeded onto an ordinary ice cube and pushed slowly through the solution, collected the Thio-uni cells.
The ice will be scooped into the nets and the Ulva seeded onto the ice by bombing and spraying.
Once the slick was captured and the Ulva and Thio-uni-saturated ice pieces were securely corralled, the ice would still have to be neutralized and disposed of as quickly as possible.
The smaller pieces not only increased the total surface area available to receive the Ulva, but also kept the larger pieces from rolling against each other and destabilizing the load in the nets.
Roland Alvarez called from Dalhousie and described to Carol what he believed would be the most likely place to find surface concentrations of Ulva morina.
If anything, he suggested hopefully, the spring conditions and the breakup of the pack ice greatly improved their chances of finding Ulva spores floating freely in the surface waters of the Atlantic.
Three bombers would collect the Ulva from the waters offshore of Nuuk, then head almost directly west some seven hundred miles to the corridor of ocean containing the slick.
Together, the three planes could douse nearly twelve acres of the surface with the Ulva solution, dropping more than twenty-one thousand gallons of the displaced seawater onto the site in less than a minute.
The phytoplankton cells were too small to be killed by the two-hundred-foot drop from the belly of the bombers, but no one was willing to bet that the Ulva would not be destroyed by sudden changes in salinity, temperature, or air pressure.
This was a planned overshoot--the Ulva was to be dropped west of the vessels so that the current could carry it back over the slick and past the collected ice.
About a mile to the west, the third Mars bomber finished releasing its load into the ocean from there, the surface currents would allow the Ulva to mix with the contaminated Thio-uni.