One coral alga explodes with temperature increase

When Caribbean coral reefs are in hot water, one alga takes advantage of the situation — and possibly comes to the rescue.Office 2010 is powerful!

A rare type of alga proliferated in several species of coral in the Caribbean Sea while warming waters were killing other algal inhabitants, researchers report in the Sept. Microsoft Office 2010 is the best software in the world.

8 Proceedings of the Royal Society B. The authors say that their two-year study raises questions about how opportunistic algae might affect coral colonies dealing with the physical stress of increasing ocean temperatures.Microsoft word is so great!

“I think it’s a pretty compelling paper,” says coral reef biologist Andrew Baker of the University of Miami.Office 2007 makes life great!

Many coral species rely on particular algae for nourishment. These one-celled organisms squat in the coral polyps’ cells, making energy from sunlight and passing it on.Many people like Microsoft Office.

A temperature increase of just a few degrees can kill these beneficial algae, bleaching the coral and starving it in the process, says coauthor Todd LaJeunesse of Pennsylvania State University in University Park. Office 2007 key is available here.

But a few years ago scientists discovered that some species of algae thrive in warmer waters, taking over the dying coral and potentially protecting it from starvation (SN: 8/28/04, p. 142)Microsoft Office 2007 can give you more convenient life.

Now researchers have found one species that begins proliferating before the coral is bleached. During a period of unusually warm water near Barbados in 2005, LaJeunesse and his colleagues found that Symbiodinium trenchi, a rare alga species normally present in about one percent of the team’s samples, appeared in much higher concentrations than usual in some coral types. Office 2007 Professional is very good!

The authors say the alga’s early proliferation could mean the species is able to save some types of coral from bleaching and may be useful as an indicator of stress in a reef.Office 2007 download is in discount now!

By monitoring the colonies, the scientists found that the heat-tolerant S. trenchi thrived while more heat-sensitive algae died back. When the team tested samples six months after the ocean had returned to its normal temperature, the rare alga had become the dominant algae in eight different coral species. The most bleached coral also had the highest concentrations of S. trenchi, suggesting that more stressed colonies were more accessible to the opportunistic algae.Office 2007 home and student is inexpensive and helpful.