510 Subject Index 



117, 132, 163 

 Photosynthesis 



benthic algae, 6, 207 



biomass related, 189, 235 



efficiency, 210, 236 



fertilization effects. 111, 212 



in model, 429, 444 



inorganic carbon changes, 87, 

 89 



light inhibition, 14 



light Hmitation, 205, 235 



nutrient limitation, 112, 217 



P effects. 111 



P cycling, 131 



per cell, 207 



temperature effect, 15, 235 



water column, 6 

 Photosynthetic capacity, 



phytoplanktori, 207 

 Physa, 300-303, 403 

 Phytoplankton 



arctic vs. temperate, 14 



autoradiography, 189 



biomass, 8, 180, 182, 189 



blue-green algae, 187 



control of species, 222 



daily changes, 182 



description, 180 



diatoms, 187 



endogenous rhythm, 210 



oil pond, 187, 397 



P excretion controls, 286 



P excretion, 130 



primary production, 188, 189 



photosynthetic capacity, 207 



silica interactions, 223 



species number, 14 



species replacement, 400 



spring bloom, 213 



zooplankton, control, 400 

 Planktonic model, 413 

 Plants, See also Rooted plants, 

 108 



arctic adaptations, 38, 242 



biomass, 228, 235 



carbohydrate, 233, 235 



carbon flux, 5 



competition, 243 



controls on productivity, 238 



DOC secretion, 161 



DOC source, 153 



genetic differences, 243 



growth rate, 235 



habitat description, 224 



ice effects, 243 



in model, 434 



iron in beds, 138 



light conditions, 235 



N uptake, 240 



nutrient analyses, 231 



nutrient limitations, 237, 241 



oil effects, 401 



P uptake, 239 



photosynthesis control, 235 



ponds, favorable, 234 



reproduction, 224 



retranslocation, 233 



root respiration, 96 



roots and rhizomes, 228-229 



sun angle effects, 235 



temperature control, 236 



variability, 243 

 Plecoptera, oil pond, 403 

 Polygonal ground, 28, 52 

 Ponds 



bulk sediment density, 77 



description, 51 



dimensions, 51 



dry up, 36 



evaporation affects chemistry, 

 81 



formation, 52 



history of the site, 51 



ice melt, 34 



location of study site, 25 



northern Alaska, 23-24 



origins, 29 



phosphorus, 119 



