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Last updated: October 11, 2002
South Florida Restoration Science Forum

Nutrients

What sources are significant and why?

Part 3: Identification of phosphorus sources using uranium isotopes

U = fertilizer (AR ~ 1.0)
u = natural (AR = 1 to 3)

Phosphate
rock

square with U

arrow
Fertilizer

square with U's

arrow
Agricultural fields

farmland with U's and u's

water with U's and u's

Runoff
raincloud with u

Natural
areas

cattails with U's and u's

Evidence of P fertilizer in Everglades sediments

graph

(Click on graph above for larger version.)


Back Back to the Nutrients homepage


U.S. Department of the Interior, U.S. Geological Survey, Center for Coastal Geology
This page is: http://sofia.usgs.gov/sfrsf/rooms/nutrients/sources/uisotopes.html
Comments and suggestions? Contact: Heather Henkel - Webmaster
Last updated: 11 October, 2002 @ 09:42 PM (HSH)