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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.


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, which is formed into columns in places.

Ulva has been populated since the Mesolithic and there are various Neolithic remains on the island. The Norse occupation of the island in the Early Historic Period has left few tangible artefacts but did bequeath the island its name, which is probably from Ulvoy, meaning "wolf island". Celtic culture was a major influence during both Pictish and Dalriadan times as well as the post-Norse period when the islands became part of modern Scotland. This long period, when Gaelic became the dominant language, was ended by the 19th-century Clearances. At its height Ulva had a population of over 800, but today this has declined to less than 20.

Numerous well-known individuals have connections with the island including David Livingstone, Samuel Johnson and Walter Scott, who drew inspiration from Ulva for his 1815 poem, The Lord of the Isles. Wildlife is abundant: cetaceans are regularly seen in the surrounding waters and over 500 species of plant have been recorded. Today there is a regular ferry service and tourism is the mainstay of the economy.

Ulva (disambiguation)

Ulva is an island in the Inner Hebrides, Scotland.

Ulva may also refer to:

  • Ulva Island (New Zealand)
  • New Ulva, on Danna, Scotland, an island in the Inner Hebrides
  • Sea lettuce, the genus Ulva

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.