The ecosystem of a river is the river viewed as a system operating in its natural environment, and includes biotic (living) interactions amongst plants, animals and micro-organisms, as well as abiotic (nonliving) physical and chemical interactions. River ecosystems are prime examples of lotic ecosystems.arge rivers have comparatively more species than small streams. Many relate this pattern to the greater area and volume of larger systems, as well as an increase in habitat diversity. Some systems, however, show a poor fit between system size and species richness.
AT&T to Acquire Centennial Communications, Enhance Service for Wireless Customers and Businesses Dallas, Texas, Wall, New Jersey, November 7, 2008 AT&T Inc. (NYSE:T) and Centennial Communications Corp. (Nasdaq:CYCL) today announced that AT&T plans to acquire Centennial, a regional provider of wireless and wired communications services, for $944 million in cash.
6. In 1904 St. Louis, Missouri hosted the 1904 World's Fair, the centennial of the Louisiana land purchase from the French (one year late) with a Louisiana Purchase Exposition and the 2004 Olympics.One other major event took place that may have saved an industry from being shut down due to health concerns.. For thousands of years doctors told patients suffering from pain to chew on the bark of a willow tree. Even as far back as 400 B.C. Hippocrates recommended a tea made from yellow leaves. It wasn't until the 1800's that scientists discovered what was in the willow tree that relieved pain and reduced fever.