Charpy,-L.; Charpy-Roubaud,-C.J.  Phosphorus budget in an 
	atoll lagoon.  PROCEEDINGS-OF-THE-SIXTH-INTERNATIONAL-
	CORAL-REEF-SYMPOSIUM,-TOWNSVILLE,-AUSTRALIA,-8th-12th-
	AUGUST-1988.-VOLUME-2:-CONTRIBUTED-PAPERS-MINI-
	SYMPOSIUM-1-TO-10-14. Choat,-J.H.;Barnes,-
	D.;Borowitzka,-M.A.;Coll,-J.C.;Davies,-P.J.;Flood,-
	P.;Hatcher,-B.G.;et-al.-eds.. 1988. pp. 547-550.

The different states of phosphorus (mineral, organic, 
dissolved and particulate) were studied between 1982 and 1987 
in the oceanic and lagoon waters and sediment pore waters of 
the atoll of Tikehau. Fluxes associated with the different 
forms of phosphorus were measured or estimated. The 
percentages of phosphorus forms in the lagoon are 58% for the 
dissolved organic (DOP), 23% for the phosphates (PO sub(4)) 
and 18% for the particulate organic (POP). Living POP is 
composed by 28% of phytoplankton, 20% of heterotrophs < 5  mu 
m, 26% of heterotrophs 5  mu m-35  mu m and 26% of 
zooplankton (35  mu m - 2000  mu m). Phosphate flux from 
sediment give all the phosphorus required by phytobenthic 
production. Detritus probably come from reef production. POP 
exportation from the lagoon represents only 2.5% of 
phytoplankton production.