Subscribe
Subscribe
MY AMERICAN SCIENTIST
LOG IN! REGISTER!
SEARCH
 
Logo IMG
HOME > My Amsci > Restricted Access

The Artificial Nile



Restricted Access The content you've requested is available without charge only to active Sigma Xi members and American Scientist subscribers.


If you are an active member or an individual subscriber, please log in now in order to access this article.

If you are not a member or individual subscriber, you can:



Abstract:

Figure 8. Sewage alone . . .Click to Enlarge Image

Fish caught in Mediterranean waters just off the Nile River Delta have been an important source of protein for Egyptians for millennia, despite the general lifelessness of the eastern Mediterranean. Each summer before 1964, rains in Ethiopia produced a rush of water down the Nile that carried vital nutrients to feed the fishery. But when the Aswan High Dam closed its gate in 1964, the nutrient flow was blocked, and catches soon plummeted. Mysteriously, however, fishing began to pick up again around 1980 and now exceeds pre-dam levels. The author proposes that nutrient flow has been restored by human activities, including the use of fertilizers for agriculture and the development of sewage systems used by a burgeoning population.


Connect With Us:

Facebook Icon Sm Twitter Icon Google+ Icon Pinterest Icon RSS Feed

Subscribe to Free eNewsletters!

  • American Scientist Update

  • An early peek at each new issue, with descriptions of feature articles, columns, and more. Every other issue contains links to everything in the latest issue's table of contents.

  • Scientists' Nightstand: Holiday Special!

  • News of book reviews published in American Scientist and around the web, as well as other noteworthy happenings in the world of science books.

    To sign up for automatic emails of the American Scientist Update and Scientists' Nightstand issues, create an online profile, then sign up in the My AmSci area.


Read Past Issues on JSTOR

JSTOR, the online academic archive, contains complete back issues of American Scientist from 1913 (known then as the Sigma Xi Quarterly) through 2005.

The table of contents for each issue is freely available to all users; those with institutional access can read each complete issue.

View the full collection here.


RSS Feed Subscription

Receive notification when new content is posted from the entire website, or choose from the customized feeds available.


Write for American Scientist

Review our submission guidelines.


Subscribe to American Scientist