Rivers exchange water, materials, energy, and nutrients, in a reciprocal manner with the surrounding environment. River water quality, sediment characteristics, and biological communities, all reflect characteristics of the upstream, and even the downstream environment.aintaining position in the face of flow can be energetically costly, but provides access to a conveyer belt-like food-delivery system. Stream and river organisms reflect their localized niche, and surrounding landscape both upstream and downstream.
In a merger announced on March 5, 2006, and executed on December 29, 2006, AT&T Inc. (originally SBC Communications) acquired BellSouth for approximately $86 billion (1.325 shares of AT&T for each share of BellSouth).
In April 2000, the companies announced that the Bell Atlantic-GTE merger would take the name Verizon and that the Bell Atlantic-Vodafone wireless unit would be called Verizon Wireless. Verizon Communications owned 55 percent of Verizon Wireless while Vodafone retained 45 percent ownership.