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

   • O. Osonubi
   • R. Oren
   • H. Heilmeier

   Original Papers Pages: 1 - 6

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

   • J. Meyer
   • B. U. Schneider
   • E. -D. Schulze

   Original Papers Pages: 7 - 13

3. Fluctuations of observed breeding Rough-legged Hawks and Gyrfalcons: regularity reconsidered

   • D. P. Mindell
   • C. M. White

   Original Papers Pages: 14 - 18

4. Seasonal pollen flow and progeny diversity in Amianthium muscaetoxicum: ecological potential for multiple mating in a self-incompatible, hermaphroditic perennial

   • Mary Palmer
   • Joseph Travis
   • Janis Antonovics

   Original Papers Pages: 19 - 24

5. Role of phosphorus and nitrogen in photosynthetic and whole plant carbon gain and nutrient use efficiency in eastern white pine

   • P. B. Reich
   • A. W. Schoettle

   Original Papers Pages: 25 - 33

6. Filtration rate capacities in 6 species of European freshwater bivalves

   • Jakob Kryger
   • Hans Ulrik Riisgård

   Original Papers Pages: 34 - 38

7. Movements of carabid beetles (Coleoptera: Carabidae) inhabiting cereal fields: a field tracing study

   • H. Wallin
   • B. S. Ekbom

   Original Papers Pages: 39 - 43

8. Nutritional physiology of the eastern spruce budworm, Choristoneura fumiferana, infected with Nosema fumiferanae, and interactions with dietary nitrogen

   • L. S. Bauer
   • G. L. Nordin

   Original Papers Pages: 44 - 50

9. Intra-crown variation in leaf herbivory and seed production in striped maple, Acer pensylvanicum L. (Aceraceae)

   • Robert J. Marquis

   Original Papers Pages: 51 - 55

10. Thermal effects on activity patterns and behavioural switching in a concourse of foragers on Stachytarpheta mutabilis (Verbenaceae) in Papua New Guinea

    • G. N. Stone
    • J. N. Amos
    • F. Parrott

    Original Papers Pages: 56 - 63

11. Nitrogen translocation in a clonal dune perennial, Hydrocotyle bonariensis

    • Jonathan P. Evans

    Original Papers Pages: 64 - 68

12. Maturation characteristics of Rubus pennsylvanicus fruit: are black and red the same?

    • Muriel E. Poston
    • George A. Middendorf III

    Original Papers Pages: 69 - 72

13. Competition between two stream dwelling filter-feeders, Hydropsyche oslari and Simulium virgatum

    • Nina Hemphill

    Original Papers Pages: 73 - 80

14. Predator avoidance, microhabitat shift, and risk-sensitive foraging in larval dragonflies

    • C. L. Pierce

    Original Papers Pages: 81 - 90

15. Relative availability of nitrogen in host plants of invertebrate herbivores: three possible nutritional and physiological definitions

    • Stephen D. Cockfield

    Original Papers Pages: 91 - 94

16. Friends and strangers: a test of the Charnov-Finerty Hypothesis

    • Rudy Boonstra
    • Ian Hogg

    Original Papers Pages: 95 - 100

17. Occupation of submerged aquatic vegetation by fishes: testing the roles of food and refuge

    • Lawrence P. Rozas
    • William E. Odum

    Original Papers Pages: 101 - 106

18. Niche shifts in Greater Antillean Anolis communities: effects of niche metric and biological resolution on null model tests

    • James W. Haefner

    Original Papers Pages: 107 - 117

19. Associational plant refuges: convergent patterns in marine and terrestrial communities result from differing mechanisms

    • Catherine A. Pfister
    • Mark E. Hay

    Original Papers Pages: 118 - 129

20. Evolution of a unique seed maturity pattern in Croton bonplandianum Baill strengthens ant-plant mutualism for seed dispersal

    • K. N. Ganeshaiah
    • R. Uma Shaanker

    Original Papers Pages: 130 - 134

21. Seed abortion in wind-dispersed pods of Dalbergia sissoo: maternal regulation or sibling rivalry?

    • K. N. Ganeshaiah
    • R. Uma Shaanker

    Original Papers Pages: 135 - 139

22. Surfactant-producing microorganisms isolated from the gut of a Eucalyptus-feeding sawfly, Perga affinis affinis

    • C. P. Ohmart
    • J. R. Thomas
    • B. Bubela

    Short Communication Pages: 140 - 142

23. The effect of varying nitrogen and phosphorus availabilityon nutrient use by Larrea tridentata, a desert evergreen shrub

    • Kate Lajtha
    • Melanie Klein

    Erratum Pages: 143 - 143

24. Announcement

    Announcement Pages: 144 - 144