418 



INDEX 



Plants, competition, 162-165 



consociation, 244 



cooperation, 155, 156 



cover, 110 



disoperation, 157, 158 



dominants, 235, 236 



ecesis, 63 



ecology, 3 



flowering, 136 



functions, 36-44 



fungi, bacteria, 136, 137, 138 



grassland, 251-293 



importance of shelter, 111 



influents, 238 



insectivorous, 137 



migration, 60, 61 



passive members, 117, 118 



symbiosis, 138-143 



tidal areas, 99, 100 

 Plethodon cinercus, 231 

 Pleurobrachia, 315 

 Pleurococcus, 140 

 Plover, 208 

 Plumosus larvae, 178 

 Pluvialis dominica, 208 

 Poa, 287, 288 



nevadensis, 291 



scabrella, 256, 287 



scabrella secunda, 291, 292 

 Pocket mouse, 290 

 Podocarpus, 139 

 Pododesmus macroschisma, 330 

 Pogonomyrmex occidentalis, 83 

 Pollination, 141-143 

 Polyarthra, 301 

 Polychaeta, 334 

 Polygyra monodon, 231 

 Polyodon spathula, 305 

 Polyorchis, 315 

 Polyponis, 140 

 Pomoxis sparoides, 301 

 Pool, community, 301 



mud-bottomed, 308 

 Population, 180, 185, 186 

 Porpoise, 336 

 Portlandia, 334 

 Portuguese man-of-war, 319 

 Postclimax, 233, 200, 262, 273 

 Prairie, bunchgrass, 120 



California, 285 



chicken, 196, 254, 274 



Prairie, coastal, 277 

 gulf, 256 



desert, 280 



dog, 11, 80, 119, 122, 172, 253, 264, 

 268, 285 

 burrows, 81 

 towns, 122, 237, 253 



falcon, 265 



horned lark, 274 



mixed, 256, 260 



mouse, deer, 274 

 meadow, 274 



Palousc, 256, 290, 291 



peninsula, 270 



sand, 9 



rattlesnake, 265 



true, 256, 269 

 Preclimax, 233 

 Predaceous beetles, 131 

 Predaceous insects, 135 

 Prcdation, 330 

 Predators, 174 

 Predominance, 351 



Predominant influents, 241, 318, 319, 320 

 Presociety, 246 

 Prevalence, 330 

 Prevalent influents, 241 

 Prey, 316 

 Primary seres, 232 

 Primitive man, 131 

 Procladius, 305 

 Proclimax, 263, 283 



California prairie, 288 



coastal prairie, 279, 280 



desert prairie, 283 



mixed prairie, 263, 264 



Palouse prairie, 292, 293 



true prairie, 263, 264 

 Production of eggs, 182 

 Promachus, 275 

 Pronghorn, 252 



Pronghorn antelope, 120, 264, 273 

 Propagation, 38, 39 



game birds, 105 

 Propagule, 39 

 Proptera alata, 300 

 Prosopis, 279, 283, 292 



juliflora, 113 

 Protoparce quinquemaculatus, 142 

 Protozoa, 301, 315 

 Protozoans, 46 



