MEDIAWEEK — May 12 — The top 10 social - networking sites
collectively grew 47 % year
over year,
reaching 68.8 million users in April 2006, which represents 45 % of all Web users, according to a Nielsen / / NetRatings report.
And because surface productivity more rapidly
reaches the floor of those shallow shelves, bottom dwelling organisms
collectively called the «benthos,» receive
over 70 % of the energy sequestered at the surface.