1. Factors determining the abundance and distribution of rodents in a shrub-steppe ecosystem: the role of shrubs

   • Robert R. Parmenter
   • James A. MacMahon

   Original Papers Pages: 145 - 156

2. Optimal foraging and growth in bluegills

   • Gary G. Mittelbach

   Original Papers Pages: 157 - 162

3. The effects of meiofauna on settling macrofauna: meiofauna may structure macrofaunal communities

   • Mary C. Watzin

   Original Papers Pages: 163 - 166

4. Microhabitat heterogeneity and population ecology of an herbivorous rodent, Microtus californicus

   • Andrew Cockburn
   • William Z. Lidicker Jr

   Original Papers Pages: 167 - 177

5. Bunchgrass architecture, light interception, and water-use efficiency: assessment by fiber optic point quadrats and gas exchange

   • M. M. Caldwell
   • T. J. Dean
   • J. H. Richards

   Original Papers Pages: 178 - 184

6. Competition for dispersal agents among tropical trees: influences of neighbors

   • Robin S. Manasse
   • Henry F. Howe

   Original Papers Pages: 185 - 190

7. Ants and extrafloral nectaries: no evidence for plant protection in Helichrysum spp. — ant interactions

   • Dennis J. O'Dowd
   • E. A. Catchpole

   Original Papers Pages: 191 - 200

8. Bird diversity and density in south african forests

   • Martin L. Cody

   Original Papers Pages: 201 - 215

9. Canopy processing of acidic precipitation by coniferous and hardwood forests in New England

   • C. S. Cronan
   • W. A. Reiners

   Original Papers Pages: 216 - 223

10. Gray whales and the structure of the Bering Sea benthos

    • M. K. Nerini
    • J. S. Oliver

    Original Papers Pages: 224 - 225

11. Induced responses of cherry trees to periodical cicada oviposition

    • Richard Karban

    Original Papers Pages: 226 - 231

12. Nectar production rates of Asclepias quadrifolia: causes and consequences of individual variation

    • John M. Pleasants
    • Stephen J. Chaplin

    Original Papers Pages: 232 - 238

13. Further studies on a native Australian eucalypt forest invaded by exotic pines

    • G. A. Chilvers
    • J. J. Burdon

    Original Papers Pages: 239 - 245

14. Geographic variation in habitat structure for the wood warblers in Maine and Minnesota

    • Scott L. Collins

    Original Papers Pages: 246 - 252

15. The effects of clipping, nitrogen source and nitrogen concentration on the growth responses and nitrogen uptake of an east african sedge

    • R. W. Ruess
    • S. J. McNaughton
    • M. B. Coughenour

    Original Papers Pages: 253 - 261

16. The efficiency of pollen transfer and rates of embryo initiation in Cryptantha (Boraginaceae)

    • Brenda B. Casper

    Original Papers Pages: 262 - 268

17. Production, reproduction and size in mammals

    • David Western

    Original Papers Pages: 269 - 271

18. Ecological correlates of explosive seed dispersal

    • Nancy E. Stamp
    • Jeffrey R. Lucas

    Original Papers Pages: 272 - 278

19. Effects of diurnal thermoperiods and quickly oscillating temperatures on the development and reproduction of crickets, Gryllus bimaculatus

    • Walter Behrens
    • Klaus-Hubert Hoffmann
    • Gisela Merkel-Wallner

    Original Papers Pages: 279 - 287

20. Litter decomposition, CO₂-release and enzyme activities in a snowbed and on a windswept ridge in an alpine environment

    • F. Schinner

    Original Papers Pages: 288 - 291

21. Relative abundance in an alien weed flora

    • Frank Forcella
    • Stephen J. Harvey

    Original Papers Pages: 292 - 295

22. Vesicular-arbuscular mycorrhizae of weedy and colonizer plant species at disturbed sites in Utah

    • R. L. Pendleton
    • B. N. Smith

    Original Papers Pages: 296 - 301

23. Habitat quality and the reproductive strategies of the migratory morphs of the bird cherry-oat aphid, Rhopalosiphum padi (L.), colonizing secondary host plants

    • S. R. Leather
    • P. W. Wellings
    • A. F. G. Dixon

    Original Papers Pages: 302 - 306

24. Population structure, residency and weather related mortality in the black swallowtail butterfly, Papilio polyxenes

    • Robert C. Lederhouse

    Original Papers Pages: 307 - 311

25. The importance of food and space in limiting web-spider densities; a test using field enclosures

    • Ann L. Rypstra

    Original Papers Pages: 312 - 316

26. Models of hostplant location by butterflies: the effect of search images and search efficiency

    • S. P. Courtney

    Original Papers Pages: 317 - 321

27. Leaf consumption by insects in three Eucalyptus forest types in Southeastern Australia and their role in short-term nutrient cycling

    • C. P. Ohmart
    • L. G. Stewart
    • J. R. Thomas

    Original Papers Pages: 322 - 330

28. Time and energy constraints on the brood size of swallows, Hirundo rustica, and sand martins, Riparia riparia

    • Angela K. Turner

    Original Papers Pages: 331 - 338

29. Foliage damage in coniferous trees following volcanic ashfall from Mt. St. Helens

    • V. A. Seymour
    • T. M. Hinckley
    • J. F. Franklin

    Original Papers Pages: 339 - 343

30. Drought relations of shrub species: assessment of the mechanisms of drought resistance

    • T. M. Hinckley
    • F. Duhme
    • H. Richter

    Original Papers Pages: 344 - 350

31. Reproduction of Erythronium umbilicatum (Liliaceae): pollination success and pollinator effectiveness

    • Alexander F. Motten

    Original Papers Pages: 351 - 359

32. The timing of seed dispersal in Viooa nuttallii: attraction of dispersers and avoidance of predators

    • Christine L. Turnbull
    • David C. Culver

    Original Papers Pages: 360 - 365

33. Autotoxic inhibition of seed germination by Typha latifolia: an evaluation

    • James B. Grace

    Original Papers Pages: 366 - 369

34. Seed predation and patterns of fruit production in Asclepias syriaca L.

    • Susan E. Franson
    • Mary F. Willson

    Original Papers Pages: 370 - 376

35. Seasonal variation in the gas exchange characteristics of Primula species

    • David M. Whale

    Original Papers Pages: 377 - 383

36. Ecological consequences of body size: a model for patch choice in desert rodents

    • Mary V. Price

    Original Papers Pages: 384 - 392

37. Coexistence and interference in two submersed freshwater perennial plants

    • Nancy J. McCreary
    • Stephen R. Carpenter
    • Jack E. Chaney

    Original Papers Pages: 393 - 396

38. Invasion by the tufted duck Aythya fuligula into a pond area: implications of diffuse competition

    • Roland Brandl
    • Klaus Schmidtke

    Original Papers Pages: 397 - 401

39. Sex ratio adjustment in Asobara persimilis (Hymenoptera: braconidae), a parasitoid of Drosophila

    • Robin E. Owen

    Short Communications Pages: 402 - 404

40. Indirect mutualism in the legume — Rhizobium — mycorrhizal fungus interaction

    • Helen C. Cluett
    • Douglas H. Boucher

    Short Communications Pages: 405 - 408

41. Ethylene production by ascocarps of Elaphomyces species

    • H. -Ö. Nohrstedt
    • L. E. Kers

    Short Communications Pages: 409 - 410

42. Drosophila baits and yeasts: species attracted

    • Louis Bernard Klaczko
    • Jeffrey R. Powell
    • Charles E. Taylor

    Short Communications Pages: 411 - 413

43. Leaf-scratching — a specialized behaviour of danaine butterflies (Lepidoptera) for gathering secondary plant substances

    • Michael Boppré

    Short Communications Pages: 414 - 416

44. A fiber optic point quadrat system for improved accuracy in vegetation sampling

    • M. M. Caldwell
    • G. W. Harris
    • R. S. Dzurec

    Short Communications Pages: 417 - 418