Red tides, also known as harmful algal blooms, or HAB's, are the result of a massive multiplication, or "bloom", of microscopic, single-celled algae named Karenia brevis, (aka K. brevis), or single-celled organisms called dinoflagellates.
Most oceanographers and scientists prefer the term harmful algal blooms over the term red tide because the water is not always discolored when the blooms cause damage and because it is often harmless even when the water is discolored.
There are still many differing theories as to the cause of these phenomena. .
One such theory put forward by Raphael Kudela, assistant professor of ocean studies at the University of California, Santa Cruz, is that the increased urea content in the sewage run-off in urban, agricultural, and aquicultural areas may play a more crucial role in triggering and/or sustaining harmful algal blooms than was previously considered.
Although marine biologists routinely monitor the sea's ecosystems for above normal concentrations of common inorganic nutrients, urea has not been on the list of substances to be monitored.
Laboratory studies have shown that dinoflagellates use organic urea as a nutrient. It has also been determined that dinoflagellates prefer urea to other inorganic forms of nitrogen. .
High levels of nutrients combined with abundant sunlight can make these single-celled plants grow incredibly fast. They have even been known to double in size within a twenty-four hour period.
Although some species of this phytoplankton produce strong neurotoxins when they bloom, most of these "blooms" are not harmful.
As phytoplankton is the ocean's primary producer, these toxins are transferred up the food chain and can even effect humans. (Kudela, UCSC, 2000).
What is so baffling about red tides is that humans cannot control them. Some believe that the blooms are triggered by just the right temperature, salinity, and nutrient levels in the water.
This occurrence is due to what is called the red tide. ... Red tides actually have nothing to due with tides. ... Human health is another impact of the red tide. ... Red tides can occur all over the world and problems seem to follow wherever the tides might end up. ... Their website is dedicated to research for the red tide and their goal is to find some way to prevent/control the red tide without harming the environment. ...
Because Nori Seaweed attach to rocks, they provide shelter to other organisms it shares the tide pool with. ... Chiton on the other hand, feed on brown and red algae, such as Nori Seaweed, Black Pine, and Coral Weed that are located in the same community. ... My independent variable is the number of Starfish, which I took away from the tide pool. ... I started my experiment with Starfish present in the tide pool. ... In conclusion, not only the starfish, but all species in the tide pool community must be present and maintain a healthy population number in order for the tide pools to maintain b...
Likewise we never get to know any names in "The Red Room". ... The signal box itself is where most of the story is set.The railway box is tidely furnished. ... "The Red Room" is writen in first person singular. ... There are other characters in "The Red Room". ... There is no actual ghost in "The Red Room". ...
Difficult struggle is often a humbling experience. In Stephen Crane's The Red Badge of Courage, Henry Fleming joins the Union army and tests his character during the Civil War. At first, the green Henry is confident that the war will bring no real challenges and he is concerned only with the ant...
"Thanatopsis-, "Masque of the Red Death-, "The Devil and Tom Walker-, "The Tide Rises, The Tide Falls-, "A Psalm of Life-, "Self-Reliance-, "Civil Disobedience- and Walden demonstrate this influence. ... Perfection is again visible in "The Tide Rises, The Tide Falls- by Henry Wadsworth Longfellow. ... "The day returns but nevermore/Returns the traveler to the shore,/And the tide rises, the tide falls."" ... From Edgar Allen Poe's "Masque of the Red Death-: "The Red Death' had long devastated the country."" ... "The Tide Rises, The Tide Falls- shows the theme as well. ...
As I watch the red sun sink smoothly into the ocean, various shades of red are cast upon the sea. The colors range from blood red to a flamingo pink. ... The shore is peppered with small, round stones that have been pounded smooth by the tide. ...
As I watch the red sun sink smoothly into the ocean, various shades of red are cast upon the sea. The colors range from blood red to a flamingo pink. ... The shore is peppered with small, round stones that have been pounded smooth by the tide. ...
Influenced writers of this time include Washington Irving, author of RIP VAN WINKLE; Edgar Allan Poe, author of many masterpieces, such as THE MASQUE OF THE RED DEATH, ELDORADO, ANNABEL LEE, TO HELEN, and THE RAVEN; Nathaniel Hawthorne, and Herman Melville, author of the famous MOBY DICK. ... Longfellow wrote THE CROSS OF SNOW, THE ROPEWALK, and THE TIDE RISES, THE TIDE FALLS. ...
