1. Foraging rhythm of great crested grebes Podiceps cristatus adjusted to diel variations in the vertical distribution of their prey Osmerus eperlanus in a shallow eutrophic lake in The Netherlands

   • T. Piersma
   • R. Lindeboom
   • M. R. van Eerden

   Original Papers Pages: 481 - 486

2. Tree-ring analysis and conifer growth responses to increased atmospheric CO₂ levels

   • Felix Kienast
   • Robert J. Luxmoore

   Original Papers Pages: 487 - 495

3. Prey preference in stoneflies: a comparative analysis of prey vulnerability

   • J. D. Allan
   • A. S. Flecker

   Original Papers Pages: 496 - 503

4. Variability of the grass Phragmites australis in relation to the behaviour and mortality of the gall-inducing midge Giraudiella inclusa (Diptera, Cecidomyiidae)

   • Teja Tscharntke

   Original Papers Pages: 504 - 512

5. Performance of two Picea abies (L.) Karst. stands at different stages of decline

   • R. Zimmermann
   • R. Oren
   • K. S. Werk

   Original Papers Pages: 513 - 518

6. Performance of two Picea abies (L.) Karst. stands at different stages of decline

   • K. S. Werk
   • R. Oren
   • J. Meyer

   Original Papers Pages: 519 - 524

7. Factors affecting post-dispersal seed survival in a tropical forest

   • Eugene W. Schupp

   Original Papers Pages: 525 - 530

8. Three sympatric species of Neotoma: dietary specialization and coexistence

   • Kenneth P. Dial

   Original Papers Pages: 531 - 537

9. The effect of prior adult experience on components of habitat preference in the apple maggot fly (Rhagoletis pomonella)

   • Daniel R. Papaj
   • Ronald J. Prokopy

   Original Papers Pages: 538 - 543

10. Thermoregulation as a limit to habitat use in alpine marmots (Marmota marmota)

    • A. Türk
    • W. Arnold

    Original Papers Pages: 544 - 548

11. Consequences of divergent egg phenology to predation and coexistence in two sympatric, congeneric mantids (Orthoptera: Mantidae)

    • L. E. Hurd

    Original Papers Pages: 549 - 552

12. Comparative ecophysiology of Encelia farinosa and Encelia frutescens

    • James R. Ehleringer

    Original Papers Pages: 553 - 561

13. Correlations between carbon isotope ratio and microhabitat in desert plants

    • James R. Ehleringer
    • Tamsie A. Cooper

    Original Papers Pages: 562 - 566

14. Microhabitat shifts of lizards under different contexts of sympatry: a case study with South American Liolaemus

    • R. G. Medel
    • P. A. Marquet
    • F. M. Jaksić

    Original Papers Pages: 567 - 569

15. Predation pressure on an imperfect Batesian micicry complex in the presence of alternative prey

    • Martin Hetz
    • C. N. Slobodchikoff

    Original Papers Pages: 570 - 573

16. Daily foraging schedule of field colonies of the eastern tent caterpillar Malacosoma americanum

    • T. D. Fitzgerald
    • Tim Casey
    • Barbara Joos

    Original Papers Pages: 574 - 578

17. The species-area relationship of European Lumbricidae (Annelida, Oligochaeta)

    • M. Judas

    Original Papers Pages: 579 - 587

18. A key factor analysis of a sparrowhawk population

    • I. Newton

    Original Papers Pages: 588 - 596

19. Augmentation of beneficial arthropods by strip-management

    • Wolfgang Nentwig

    Original Papers Pages: 597 - 606

20. Spatial patterns of goldenrod aphids and the response of enemies to patch density

    • N. Cappuccino

    Original Papers Pages: 607 - 610

21. Weight changes of cross-desert migrants at an oasis —do energetic considerations alone determine the length of stopover?

    • Uriel N. Safriel
    • Daphna Lavee

    Original Papers Pages: 611 - 619

22. Relationship among settling, demography and habitat selection: an approach and a case study

    • Moshe Shachak
    • Sol Brand

    Original Papers Pages: 620 - 626

23. Density-dependent size regulation and negative growth in the sea urchin Diadema antillarum Philippi

    • Don R. Levitan

    Original Papers Pages: 627 - 629

24. A mechanism for interference between stream predators: responses of the stonefly Agnetina capitata to the presence of sculpins

    • Daniel A. Soluk
    • Nicholas C. Collins

    Short Communication Pages: 630 - 632