Release and Capillary Movement of Phosphorus 665 



ARANSAS PASS. 



® % ST. J S E PH 



*^ I slAnd 



5 MILES ^ 



Fig. 1. General description of the shallow marine bays near the Institute of 

 Marine Science. Numerals indicate various sampling areas. 



ganisms, detritus and clays (8) and visability usually extends 

 only a few cm into the water. When the wind blows the water 

 over the exposed flats, the organic materials, clays and other 

 solids, settle out or are entrapped by the blue-green algal mat and 

 become a part of the sediments. In this way phosphate is trapped, 

 in the remains of dead organisms, in the detritus adsorbed to iron 

 hydroxide or clays, and as insoluble phosphate minerals. Redfish 



