508 Subject Index 



meltwater, 107 

 oil pond, 392 

 particulate, 110 

 plants, 233 



primary production effects, 13 

 rainfall, 106 

 relative to C, 13 

 relative to P, 115 

 root absorption, 240-242 

 sediment, 13 

 soil, 43 



turnover in water, 13 

 uptake, 13, 107-108 

 Nitrogen fixation, 13, 104 

 oil pond, 393 

 P effects, 13, 112 

 Nitrogen gas, 105 

 Nitrogenase activity. See 



N fixation, 104 

 Nitrous oxide, 105 

 Nutrients 



bioassy and uptake, 24, 215, 



217 

 biomass control, 217 

 control photosynthesis, 24, 



217 

 limit algae, 211 

 limit plants, 45 

 regeneration, 188 

 retention within plants, 43 

 soil organic content, 43 

 uptake in model, 429 



Oil 



aeration and toxicity, 403 

 algae, 14, 219 

 bacterial effects, 395 

 benthic algae effects, 397 

 chemistry, 392 

 composition changes, 394 

 insects affected, 403 

 loss rate, 390, 393 

 N and P content, 392 

 N fixation, 393 



oxygen changed, 392 



phytoplankton affected, 187, 

 222, 397 



rooted plants affected, 401 



sediment respiration effects, 

 395 



seston effects, 292 



spill of 1970, 388 



spill of 1975, 391 



temperature effects, 391 



volatization and degradation, 

 393 



water soluble fraction, 395, 

 399, 403 



zooplankton affected, 14, 

 188, 218, 403 

 Oligochaetes 



as grazers, 219 



consume microbenthos, 382 

 Organic matter 



accumulates in soil, 43 



sediments, 8, 78 

 Oriented lakes, 24, 28 

 Ostracods, 344, 378 

 Oxalate extraction, 12, 137, 145 

 Oxygen 



arctic lakes, 22, 98 



oil pond, 392 



ponds, 97 



Particulate organic carbon. See 

 also Seston, 290 



composition, 271 



control, 164, 168 



defined, 163 



Hving percentage, 164, 271 



meltwater, 164 



sedimentation, 166-168 



zooplankton grazing, 168, 289 

 Particulate organic nitrogen, 



water, 102 

 Particulate phosphorus, 117,119 

 Permafrost 



Barrow area, 26 



