278 



ZUBARIK AND O'CONNOR 



TABLE 1 



INORGANIC MERCURY UPTAKE IN HUDSON RIVER WATER 

 FOR DIFFERENT LABELING CONDITIONS* 



Mean 



Experiment 



Organism 



dismin-' g^^ X 10^ ± SE 



1. Labeled river water 

 Labeled filtered 



river water 



2. Labeled river water 

 Labeled filtered 



river water 



3. Labeled river water 

 Labeled filtered 



river water 



4. Labeled river water 

 Labeled leaves 



5. Labeled filtered 



river water 

 Labeled algae, 



detritus, and 



bacteria 

 Labeled algae 



6. Labeled river water 

 Labeled algae, 



detritus, and 

 bacteria 



7. Labeled river water 

 Labeled algae, 



detritus, and 

 bacteria 



8. Labeled river water 

 Labeled Gammarus 



9. Labeled river water 

 1-in. mud layer 



10. Labeled river water 

 Labeled river water 



(1 day), then 

 nonlabeled river 

 water (1 day) 



11. Labeled river water 

 Labeled copepods 

 Labeled copepods, then 



1 day in nonlabeled 

 river water 



Gammarus sp. 



(G. daiberi 



and G. tigrinus) 

 Neomysis 



americana 



Morone saxatilis 



Gammarus sp. 

 Gammarus sp. 



Gammarus sp. 



Gammarus sp. 



Gammarus sp. 

 Gammarus sp. 

 Gammarus sp. 



Morone saxatilis 



1,130 ± 560 (3) 

 880 ± 110 (3) 



510 ± 220 (4) 

 680 ± 130 (2) 



8,040 + 230 (4) 

 8,200 ±4,400 (2) 



4,500 ± 2,000 (3) 

 1,090 ± 240 (3) 

 620 ± 160 (3) 



710 ± 110 (3) 



270 ±47 (3) 

 2,190 ±390 (3) 

 2,200 ±990 (3) 



510 ± 270 (3) 

 700 ±600 (3) 



150,000 ± 30,000 (10) 

 12,000 ± 2,100 (10) 

 13,220 ± 670 (3) 



99 ± 14 (3) 

 87,000 ± 13,000 (3) 



126,000 ± 27,000 (3) 



8,040 ± 200 (4) 

 10,300 ± 5,000 (2) 

 4,400 ± 2,000 (2) 



*Numbers in parentheses are numbers of replicates. 



