818 



Indiana, community conver- 

 gence in, 575, 576 

 dunes, 608, 697, 699 

 community succession in, 

 566, 567, 568, 569, 

 697, 699 

 seasonal periodicity in 

 light, 536 

 in ultraviolet, 566 

 succession in, 534, 535 

 forest, diel periodicity, 549, 

 557 



Sond succession, 572 

 ians, American, 603, 614 

 Indicator, biotic, 567 

 Indices of succession, 567 

 Individuality, 694, 718, 720, 

 721, 728. See also Levels 

 of integration; Organism; 

 Supraorganism; Units, bio- 

 logical. 

 Induction, embryological, 428, 

 677 

 environmental, 17 

 of mutations, 599 

 Infection, rust, 643, 644 

 InfertiHty, 605, 606, 622, 626, 

 676, 677. See also Isolation, 

 genetic; Isolation, physio- 

 logical; Sterility. 

 Inheritance of acquired char- 

 acters, 30, 599, 602 

 Insect(s), 618, 648, 651, 662, 

 663, 670, 689, 690. See 

 also various groups, 

 adaptation to flowers, 715 

 air transport, 148 

 arctic, cold hardiness, 102 

 climate, 211, 212 

 herbivorous, 613 

 larvae predators, 666 

 moisture relations, 187 

 nests, 686 



overwintering, 100, 102 

 pest control, 27, 28, 29, 



705, 706, 724 

 predators, 696 

 pupation rhythm, 552, 553 

 social, defense from preda- 

 tors, 425 

 division of labor among, 



420 

 nutrition among, 423 

 reproduction in, 421 

 shelter among, 425 

 societies, organizations of, 

 419-435. See also Social 

 insects. Societies. 

 in strong winds, 146, 147 

 temperature relations, J 00, 



101, 102, 207-211 

 undercooling and freezing, 

 100, 101, 102 



SUBpECT INDEX 



Insect(s), vectors, 28, 707, 

 708, 709, 724. See also 

 Host-parasite relations. 

 water content, 186 

 winglessness, 147, 148, 423, 

 672, 675, 678, 703, 717, 

 721 

 Insect-borne diseases, 28 

 Insecticide resistance, 653, 



654 

 Insolation, 212 



Instincts, 434, 435, 636, 644, 

 645, 676, 685, 686, 687, 

 692. See also Behavior, 

 Evolution, Nests. 

 Insulation, 645, 668 

 Integration, behavior, 428, 

 684, 690 

 community, 8, 698, 722, 



723, 728 

 ecological, 679, 695-729. 

 See also Biocoenose, 

 Community, Units. 

 genetic, 427, 641, 653, 683 

 interspecies, 265, 679, 684, 

 689, 695-729 

 evolution of, 695-729 

 predators and, 684 

 intraspecies, 265, 332, 389- 

 393, 419-435, 633, 664, 

 683-695, 698, 710, 721, 

 728 

 levels of, 420, 426, 427, 

 631, 639, 664, 672, 676, 

 683-695, 695-729. See 

 also Units. 

 physiological, 428, 641, 



679, 684, 718, 728 

 of population, 332, 389, 

 419-435, 633, 640, 683- 

 695, 695-729 

 social, 426-435, 633, 663, 

 664, 672, 676, 688, 

 693, 694, 701, 717, 

 718 

 mechanism of, 426 

 Integrative levels, 420, 426, 

 427, 631, 639, 664, 672, 

 676, 683-695, 695-729. See 

 also Units. 

 Integument, impervious, 185 

 IntelUgence, 435, 639, 672, 



686, 691, 694 

 Interactions, host - parasite, 



379 

 Interspecies, adaptation, 697, 

 728 

 competition, 368, 656, 657, 



663, 722 

 integration, 265, 679, 684, 



689, 695-729 

 population, 265 

 predation, 370 

 supraorganism, 721 



Intertidal zone, 162 

 Intraspecies, aggregation, 664 

 competition, 338, 349-352, 

 656, 657, 663, 690, 691, 

 692, 694, 700, 722 

 integration, 265, 332, 389- 

 393, 419-435, 633, 664, 

 683-695, 698, 710, 721. 

 728 

 population, 265, 683 

 predation, 370 

 Introduced plants and ani- 

 mals, 643, 652, 653, 666, 

 692, 699, 705, 709, 723- 

 728 

 Invasion coe£Bcient, Bohr's, 



191 

 Ionic exchange, 170 

 Ions, ecological relations, 

 167-175. See also Hy- 

 drogen ion concentration. 

 as environmental factors, 

 171 

 Iron, 167, 196, 204 



in soils, 498 

 Irradiation and vitamin D, 



128 

 Irreversibihty, law of, 679 

 Irrigation, saline soil, 222 

 Island(s), biome concept ap- 

 phed to, 583 

 Me, 600, 601, 609, 613, 

 621, 627, 657, 661, 662, 

 669, 699, 723-726 

 Isohyet, North America, 115 

 Isolation, 602, 605-630, 649 

 annual, 617, 618, 630 

 biological, 606 

 chronological, 606, 649 

 cyclic, 606, 616, 703 

 diel, 611, 618 

 ecological, 603, 606 



in fishes, 611ff. 

 ecology and, 605-630 

 ethological, 619 

 extirinsic, 606, 607, 630 

 factors, 606 

 genetic, 605, 619, 622, 623, 



676, 721 

 geographic, 30, 603, 606, 



608, 610, 611, 616 

 habitat, 606, 609, 610, 619, 



621, 624, 708 



host, 613, 708. See also 



Host specificity. 

 inb-insic, 605, 606, 607, 



630 

 mechanical, 606, 618 

 physiological, 606, 619, 



622, 676 

 psychological, 606, 618, 



619, 621, 624, 626, 630, 

 676, 677 



