386 



Index 



Subclimax species, 267 



age of, 271 



dispersal possibilities, 315, 317 



evolution of, 280 



evolutionary potential, 281 



ranges of, 280 

 Subdominant organisms, 258 

 Subdominants, ecological, 231 

 Subspecies, definition, 206 

 Substitution of dominants, 285, 289 

 Subtropical communities, 265 

 Succession, aquatic, 270, 271 



community, 266, 287 



evolution of, 283 



mechanics of, 269 

 Succession, reversal of, 272 



biotic factors, 277, 278 



long-term events, 275 



non-biotic factors, 272, 278 



short-term events, 272 

 Sugars, 35 



pentose, 38 

 Sula bassana, 126 

 Sulphur, 27 

 Sun, 7 



Suppression effects, 67 

 "Suppressor" genes, 67 

 Sutton, 3 

 Sword moss, 172 

 Sycamore, 178 

 Sijlvilagiis aqiiaticiis, 144 



floridaniis, 144 

 Sympatric species, 117 

 Symplocarpiis foetidiis, 158 



T 



Tachytely, See rapid evolution 



Taiga, 299 



Taraxacum, 157 



Taxonus, 312 



Temperate deciduous forests, 231, 



265, 275, 288, 319, 324 

 Temperature, 44 

 Temperature trends, 303 

 Temporal isolation, 183 



Termite distribution, 312 

 Termite guests, 236, 313 

 Tetramjchiis, 70 



himaculatus, 216 



telariiis, 138 

 Tetrapyrole structures, 52 

 Tetrastichus, 225 

 Thamnophis elegans, 205 

 Thermal experiments, 48 

 Thiamine, 68 

 Thymine, 39 



Time and species fission, 172 

 Time in succession, 266 

 Time scale, 56 

 Tinodes, 93 



Translocation, chromosomal, 75 

 Transovarian transmission, 72 

 Triaenodes, 240 



Trialeurodes vaporariorum, 228 

 Triboliiim, competition, 213 

 Trichoptera cases, 142 

 Triploids, 198 

 Triticum dicoccoides, 202 

 Tritium, 13 



Trophic levels, 216, 230 

 Tropical communities, 304 

 Tropical rain forest, 257, 258, 322 



effect of levelling process on, 334 



regional isolation; 324 

 Trox, 11 A 



Trypanosoma, 156, 157 

 Trypanosomes, 156 

 Tryptophane, 68 

 Tschermak, 3 

 Tundra, colonization of, 323 



u 



Unequal crossing-over, 66, 80 

 Uniparental inheritance, 82 

 Uniparental transmission, 72 

 Unisexual types, 112 

 Universe, beginning of, 12 



evolution of, 7 



expanding, 12 



motion of, 10 



