1. How to analyse prey preference when prey density varies? A new method to discriminate between effects of gut fullness and prey type composition

   • M. W. Sabelis

   Original Papers Pages: 289 - 298

2. Water relations of stem succulent trees in north-central Baja California

   • E. T. Nilsen
   • M. R. Sharifi
   • J. R. Ehleringer

   Original Papers Pages: 299 - 303

3. Plant competition for light analyzed with a multispecies canopy model

   • R. J. Ryel
   • P. W. Barnes
   • S. D. Flint

   Original Papers Pages: 304 - 310

4. Carbon dioxide exchange of Antarctic crustose lichens in situ measured with a CO₂/H₂O porometer

   • L. Kappen
   • B. Schroeter
   • L. G. Sancho

   Original Papers Pages: 311 - 316

5. The protective function of the compact silk nest of social Stegodyphus spiders (Araneae, Eresidae)

   • U. Seibt
   • W. Wickler

   Original Papers Pages: 317 - 321

6. Decomposition along a rainfall gradient in the Judean desert, Israel

   • Y. Steinberger
   • A. Shmida
   • W. G. Whitford

   Original Papers Pages: 322 - 324

7. Effects of genetic and environmental variation on resistance of willow to sawflies

   • Robert S. Fritz

   Original Papers Pages: 325 - 332

8. The influence of seed apparency, nutrient content and chemical defenses on dietary preference in Dipodomys ordii

   • Colin B. Henderson

   Original Papers Pages: 333 - 341

9. A comparison of phosphorus and nitrogen transfer between plants of different phosphorus status

   • D. M. Eissenstat

   Original Papers Pages: 342 - 347

10. Effects of pH, humic substances and animal interactions on survival and physiological status of Asellus aquaticus L. and Gammarus pulex (L.)

    • Anders Hargeby

    Original Papers Pages: 348 - 354

11. Xylem water flow in tropical vines as measured by a steady state heating method

    • K. Fichtner
    • E. -D. Schulze

    Original Papers Pages: 355 - 361

12. Influence of food density on respiration rate of two crustacean plankters, Daphnia galeata and Bosmina longirostris

    • Jotaro Urabe
    • Yasunori Watanabe

    Original Papers Pages: 362 - 368

13. Distribution and population density of the bushcricket Decticus verrucivorus in a damp-meadow biotope

    • Stephan Weidemann
    • Oliver Stiedl
    • Klaus Kalmring

    Original Papers Pages: 369 - 373

14. Plant competition for light analyzed with a multispecies canopy model

    • W. Beyschlag
    • P. W. Barnes
    • S. D. Flint

    Original Papers Pages: 374 - 380

15. Factors influencing carbon fixation and water use by mediterranean sclerophyll shrubs during summer drought

    • J. D. Tenhunen
    • A. Sala Serra
    • J. F. Reynolds

    Original Papers Pages: 381 - 393

16. Infidelity of leafcutting ants to host plants: resource heterogeneity or defense induction?

    • Jerome J. Howard

    Original Papers Pages: 394 - 401

17. Effects of endomycorrhizal infection, artificial herbivory, and parental cross on growth of Lotus corniculatus L.

    • V. A. Borowicz
    • A. H. Fitter

    Original Papers Pages: 402 - 407

18. Host-associated differences in fitness within and between populations of a seed beetle (Bruchidae): effects of plant variability

    • David H. Siemens
    • Clarence Dan Johnson

    Original Papers Pages: 408 - 413

19. Alteration of earthworm community biomass by the alien Myrica faya in Hawai'i

    • G. H. Aplet

    Original Papers Pages: 414 - 416

20. Male demographic constraints to extreme sex ratio in the twospotted spider mite

    • D. A. Krainacker
    • J. R. Carey

    Original Papers Pages: 417 - 423

21. Plant cells which aid in pollen digestion within a beetle's gut

    • Fred R. Rickson
    • M. Cresti
    • James H. Beach

    Original Papers Pages: 424 - 426

22. Insect capture and growth of the insectivorous Drosera rotundifolia L.

    • W. Schulze
    • E. -D. Schulze

    Short Communication Pages: 427 - 429

23. Chiral escape of bark beetles from predators responding to a bark beetle pheromone

    • Kenneth F. Raffa
    • Kier D. Klepzig

    Erratum Pages: 430 - 430