1. Nitrogen mineralization and nitrification in four Minnesota old fields

   • J. Pastor
   • M. A. Stillwell
   • D. Tilman

   Original Papers Pages: 481 - 485

2. The establishment, growth, phenology and longevity of two species of Helianthemum in the Negev Desert Highlands, Israel

   • M. Agami

   Original Papers Pages: 486 - 490

3. Effect of pH on microbial degradation of leaf litter in seven streams of the English Lake District

   • A. -C. Chamier

   Original Papers Pages: 491 - 500

4. Reproductive success, spontaneous embryo abortion, and genetic load in flowering plants

   • D. Wiens
   • C. L. Calvin
   • S. R. Seavey

   Original Papers Pages: 501 - 509

5. Defining “high quality” food resources of herbivores: the case for meadow voles (Microtus pennsylvanicus)

   • J. M. Bergeron
   • L. Jodoin

   Original Papers Pages: 510 - 517

6. Natal philopatry and recruitment of willow ptarmigan in north central and northwestern Canada

   • K. Martin
   • S. J. Hannon

   Original Papers Pages: 518 - 524

7. Particle size, resource concentration, and the distribution of net-spinning caddisflies

   • D. N. Alstad

   Original Papers Pages: 525 - 531

8. A capture-rate model of net-spinning caddisfly communities

   • D. N. Alstad

   Original Papers Pages: 532 - 536

9. The influence of mangrove-derived tannins on intertidal meiobenthos in tropical estuaries

   • D. M. Alongi

   Original Papers Pages: 537 - 540

10. The effect of nitrogen and phosphorus addition on the growth, reproduction, and nutrient dynamics of two ericaceous shrubs

    • E. L. Simms

    Original Papers Pages: 541 - 547

11. Nutritional quality of specific leaf tissues and selective feeding by a specialist leafminer

    • T. W. Kimmerer
    • D. A. Potter

    Original Papers Pages: 548 - 551

12. An energetics model of an aquatic predator and its application to life-history optima

    • L. R. Linton
    • R. W. Davies

    Original Papers Pages: 552 - 559

13. Live blind snakes (Leptotyphlops dulcis) in eastern screech owl (Otus asio) nests: a novel commensalism

    • F. R. Gehlbach
    • R. S. Baldridge

    Original Papers Pages: 560 - 563

14. Differences in microhabitat, abundance, biomass and body size between oxybiotic and thiobiotic free-living marine nematodes

    • P. Jensen

    Original Papers Pages: 564 - 567

15. Circadian activity patterns, photoperiodic responses and population cycles in voles

    • S. Halle
    • U. Lehmann

    Original Papers Pages: 568 - 572

16. Circadian activity patterns, photoperiodic responses and population cycles in voles

    • U. Lehmann
    • S. Halle

    Original Papers Pages: 573 - 576

17. The role of aggregation in the response of Mexican bean beetles to host-plant density

    • P. Turchin

    Original Papers Pages: 577 - 582

18. Annual activity patterns of anurans in a seasonal neotropical environment

    • M. Aichinger

    Original Papers Pages: 583 - 592

19. Initiation of early breeding in a population of Microtus townsendii (Rodentia) with the secondary plant compound 6-MBOA

    • H. Korn
    • M. J. Taitt

    Original Papers Pages: 593 - 596

20. Effects of live-trapping and toe-clipping on body weight of European and African rodent species

    • H. Korn

    Original Papers Pages: 597 - 600

21. The measurement of small-scale environmental heterogeneity using clonal transplants of Anthoxanthum odoratum and Danthonia spicata

    • J. Antonovics
    • K. Clay
    • J. Schmitt

    Original Papers Pages: 601 - 607

22. Reproductive mode may determine geographic distributions in Australian venomous snakes (Pseudechis, Elapidae)

    • R. Shine

    Original Papers Pages: 608 - 612

23. Biomass production and nitrogen content of C₃- and C₄- grasses in pure and mixed culture with different nitrogen supply

    • G. Gebauer
    • B. Schubert
    • H. Ziegler

    Original Papers Pages: 613 - 617

24. Character displacement in Hydrobia

    • A. J. Cherrill
    • R. James

    Original Papers Pages: 618 - 623

25. Stream drift, size-specific predation, and the evolution of ovum size in an amphibian

    • J. W. Petranka
    • A. Sih
    • J. R. Holomuzki

    Original Papers Pages: 624 - 630

26. Hypersensitivity reaction of Brassica nigra L. (Cruciferae) kills eggs of Pieris butterflies (Lepidoptera: Pieridae)

    • A. M. Shapiro
    • J. E. DeVay

    Short Communication Pages: 631 - 632