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Volume 06 (4) 1999

• Influence of intraspecific competition and habitat quality on diurnal activity budgets of breeding common goldeneyes

  Mark L. MALLORY, Canadian Wildlife Service, Prairie and Northern Region, P.O. Box 607, Iqaluit, Nunavut X0A 0H0, Canada, e-mail: mark.mallory@ec.gc.ca Russell A. WALTON & Donald K. McNICOL, Environment Canada, Canadian Wildlife Service, Ontario Region, 49 Camelot Drive, Nepean, Ontario K1A 0H3, Canada.

• Proximate factors affecting snowshoe hare movements during a cyclic population low phase

  Karen E. HODGES, Centre for Biodiversity Research, University of British Columbia, Vancouver, British Columbia V6R 3S3, Canada.

• Differences in the intensity of nest predation in the curlew Numenius arquata: A consequence of land use and predator densities?

  Jari VALKAMA, Dave CURRIE & Erkki KORPIMÄKI, Section of Ecology, Department of Biology, University of Turku, FIN-20014 Turku, Finland, e-mail: jarival@utu.fi

• Indirect effects of mammalian browsers on vegetation and ground-dwelling insects in an Alaskan floodplain

  Otso SUOMINEN & Kjell DANELL, Department of Animal Ecology, Swedish University of Agricultural Sciences, S-90183 Umeå, Sweden, e-mail: kjell.danell@szooek.slu.se
  John P. BRYANT, Institute of Arctic Biology, University of Alaska, Fairbanks, Alaska 99775-0180, U.S.A., e-mail: ffjpb@aurora.alaska.edu

• Cyanogenesis, herbivory and plant defense in Turnera ulmifolia on Jamaica

  Phillip J. SCHAPPERT & Joel S. SHORE, Department of Biology, York University, 4700 Keele Street, North York, Ontario M3J 1P3, Canada.

• Predation in heterogeneous forests: A comparison at natural and anthropogenic edges

  Samantha J. SONG & Susan J. HANNON, Department of Biological Sciences, University of Alberta, Edmonton, Alberta T6G 2E9, Canada.

• Frugivory and factors influencing visitation by birds at ?Balo? (Plocama pendula Ait., Rubiaceae) plants in the Canary Islands

  Manuel NOGALES, Alfredo VALIDO, Félix M. MEDINA & Juan D. DELGADO, Departamento de Biología Animal (Zoología), Universidad de La Laguna, 38206, Tenerife, Canary Islands, Spain, e-mail: mnogales@ull.es

• Historical variability in fire at the ponderosa pine - Northern Great Plains prairie ecotone, southeastern Black Hills, South Dakota

  Peter M. BROWN, Rocky Mountain Tree-Ring Research, Inc., 2901 Moore Lane, Fort Collins, Colorado 80526, U.S.A., e-mail: pmb@rmtrr.org
  Carolyn H. SIEG, Rocky Mountain Research Station, South Dakota School of Mines and Technology Campus, 501 E. St. Joseph, Rapid City, South Dakota 57701, U.S.A.

• Root, ground cover, and litterfall dynamics within canopy gaps in a slash pine (Pinus elliottii Engelm.) dominated forest

  Alison E. SCHROEER, Ronald L. HENDRICK & Timothy B. HARRINGTON, Daniel. B. Warnell School of Forest Resources, University of Georgia, Athens, Georgia 30602-2152, U.S.A.

• Spatial pattern of vegetation in high arctic sedge meadows

  Colin G. YOUNG & Mark R. T. DALE, Department of Biological Sciences, University of Alberta, Edmonton, Alberta, T6G 2E9, Canada.
  Greg H. R. HENRY, Department of Geography, University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada.

• Ecology of testate amoebae (Protozoa: Rhizopoda) in Sphagnum peatlands in the Jura mountains, Switzerland and France

  Edward A. D. MITCHELL & Alexandre J. BUTTLER, Department of Plant Ecology, Institute of Botany, University of Neuchâtel, Rue Emile Argand 11, CH - 2007 Neuchâtel, Switzerland, e-mail: edward.mitchell @bota.unine.ch
  Barry G. WARNER, Department of Geography and Wetlands Research Centre, University of Waterloo, Waterloo, Ontario, N2L 3G1, Canada.
  Jean-Michel GOBAT, Department of Plant Ecology, Institute of Botany, University of Neuchâtel, Rue Emile Argand 11, CH - 2007 Neuchâtel, Switzerland.

• Methane dynamics of a northern boreal beaver pond

  Alice DOVE & Nigel ROULET, Department of Geography and the Centre for Climate and Global Change Research, McGill University, 805 Sherbrooke St. West, Montréal, Québec H3A 2K6, Canada.
  Patrick CRILL, Complex Systems Research Center, Institute for the Study of Earth, Oceans and Space, University of New Hampshire, Durham, New Hampshire, U.S.A.
  Jeff CHANTON, Department of Oceanography, Florida State University, Tallahassee, Florida, U.S.A.
  Richard BOURBONNIERE, National Water Research Institute, Environment Canada, Burlington, Ontario, Canada.

• Boreal bog Sphagnum refixes soil-produced and respired 14CO2

  Merritt R. TURETSKY & R. Kelman WIEDER, Department of Biology, Villanova University, Villanova, Pennsylvania 19085, U.S.A.

• Peat accumulation and succession following permafrost thaw in the boreal peatlands of Manitoba, Canada

  Philip CAMILL, Department of Botany, Duke University, Durham, North Carolina 27708-0339 U.S.A., e-mail: pcamill@acpub.duke.edu

• Diatomées lacustres de Jamésie-Hudsonie (Québec) et modèle de reconstitution des concentrations de carbone organique dissous

  Marie-Andrée FALLU & Reinhard PIENITZ, Centre d'études nordiques et Département de géographie, Université Laval, Québec, Québec, G1K 7P4, Canada, courriel : m.a.fallu@courrier.cen.ulaval.ca et reinhard.pienitz@cen.ulaval.ca

• Holocene vegetational and limnological changes in the Fennoscandian tree-line area as documented by pollen and diatom records from Lake Tsuolbmajavri, Finland

  Heikki SEPPÄ, Laboratory of Physical Geography, Department of Geography, P.O. Box 9, FIN-00014,University of Helsinki, Finland, e-mail: Heikki.Seppa@geo.uu.se
  Jan WECKSTRÖM, Department of Ecology and Systematics, Division of Hydrobiology. P. O. Box 17, FIN-00014, University of Helsinki, Finland.

• Effects of sampling unit resolution on the estimation of spatial autocorrelation

  Marie-Josée FORTIN, Department of Ecology and Evolution, State University of New York, Stony Brook New York 11794-5245, U.S.A.