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Volume 13 (4) 2006

• Ant protection against herbivores and nectar thieves in Passiflora coccinea flowers

  Inara R. LEAL, Departamento de Botânica, Universidade Federal de Pernambuco, Av. Prof. Moraes Rego s/no - Cidade Universitária, 50670-901, Recife, PE, Brazil, e-mail: irleal@ufpe.br
  Erich FISCHER, Departamento de Biologia, Universidade Federal de Mato Grosso do Sul, 79070-900, Campo Grande, MS, Brazil.
  Christian KOST, Abteilung für Bioorganische Chemie; Max Planck Institut für Chemische Ökologie; Hans Knoell Str. 8; 07745 Jena, Germany.
  Marcelo TABARELLI, Departamento de Botânica, Universidade Federal de Pernambuco, Av. Prof. Moraes Rego s/ no - Cidade Universitária, 50670-901, Recife, PE, Brazil.
  Rainer WIRTH, Plant Ecology and Systematics, Department of Biology, University of Kaiserslautern, P.O. Box 3049, 67653 Kaiserslautern, Germany.

• Controlling the false discovery rate and increasing statistical power in ecological studies

  Thomas A. WAITE & Lesley G. CAMPBELL, Department of Evolution, Ecology, and Organismal Biology, Ohio State University, 318 W. 12th Avenue, Columbus, Ohio 43210, USA, e-mail: waite.1@osu.edu

• Thermal quality influences habitat selection at multiple spatial scales in milksnakes

  Jeffrey R. ROW & Gabriel BLOUIN-DEMERS, Department of Biology, University of Ottawa, 30 Marie-Curie, Ottawa, Ontario K1N 6N5, Canada, e-mail: gblouin@uottawa.ca

• Long-term canopy dynamics analyzed by aerial photographs and digital elevation data in a subalpine old-growth coniferous forest

  Yuko HENBO & Akemi ITAYA, Laboratory of Forest Ecology and Physiology, Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya 464-8601, Japan.
  Naoyuki NISHIMURA, Faculty of Environment and Information Management, Nagoya Sangyo University, Owariasahi, 488-8711, Japan.
  Shin-Ichi YAMAMOTO, Laboratory of Forest Ecology and Physiology, Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya 464-8601, Japan.

• Selecting herb species and traits as indicators of sheep grazing pressure in a Norwegian alpine habitat

  Marianne EVJU, Department of Botany, Natural History Museum, University of Oslo, P.O. Box 1172 Blindern, N-0318 Oslo, Norway.
  Atle MYSTERUD, Centre for Ecological and Evolutionary Synthesis, Department of Biology, University of Oslo, P.O. Box 1066 Blindern, N-0316 Oslo, Norway, e-mail: atle.mysterud@bio.uio.no
  Gunnar AUSTRHEIM, Museum of Natural History and Archeology, Section of Natural History, Norwegian University of Science and Technology, N-7491 Trondheim, Norway.
  Rune H. ØKLAND, Department of Botany, Natural History Museum, University of Oslo, P.O. Box 1172 Blindern, N-0318 Oslo, Norway.

• Lichen abundance in the peatlands of northern Alberta: Implications for boreal caribou

  Jesse S. DUNFORD, Department of Biological Sciences, CW?405 Biological Sciences Centre, University of Alberta, Edmonton, Alberta T6G 2E9, Canada.
  Philip D. MCLOUGHLIN, Department of Biology, University of Saskatchewan, 112 Science Place, Saskatoon, Saskatchewan S7N 5E2, Canada.
  Fredrik DALERUM3 & Stan BOUTIN, Department of Biological Sciences, CW?405 Biological Sciences Centre, University of Alberta, Edmonton, Alberta T6G 2E9, Canada, e-mail: fredrik.dalerum@ualberta.ca

• The relative performance of umbrella species for biodiversity conservation in island archipelagos of the Great Lakes, North America

  Heather A. HAGER, Ryan M. GORMAN & Thomas D. NUDDS, Department of Integrative Biology, University of Guelph, Guelph, Ontario N1G 2W1, Canada, e-mail: heatherannehager@yahoo.ca

• Why pishing works: Titmouse (Paridae) scolds elicit a generalized response in bird communities

  Gary M. LANGHAM, Department of Ecology and Evolutionary Biology, Cornell University, Ithaca, New York, USA.
  Thomas A. CONTRERAS, Department of Wildlife Ecology and Conservation, University of Florida, Gainesville, Florida 32611-0430, USA.
  Kathryn E. SIEVING, Department of Wildlife Ecology and Conservation, University of Florida, Gainesville, Florida 32611-0430, USA, e-mail: chucao@ufl.edu

• Habitat shifts and parasite loads of lesser snow geese (Chen caerulescens caerulescens)

  A. Asha MELLOR, Biology Department, City College of New York, Convent Avenue at 138th Street, New York, New York 10031, USA.
  Robert F. ROCKWELL, Biology Department, City College of New York, Convent Avenue at 138th Street, New York, New York 10031, USA, and Ornithology Department, American Museum of Natural History, Central Park West at 79th Street, New York, New York 10024, USA, e-mail: rfr@amnh.org

• Cumulative impacts on Alaskan arctic tundra of a quarter century of road dust

  Isla H. MYERS-SMITH & Britt K. ARNESEN, Institute of Arctic Biology, Department of Biology and Wildlife, University of Alaska Fairbanks, Fairbanks, Alaska 99775, USA.
  Ross M. THOMPSON, Biodiversity Research Centre, University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada.
  F. Stuart CHAPIN III, Institute of Arctic Biology, Department of Biology and Wildlife, University of Alaska Fairbanks, Fairbanks, Alaska 99775, USA.

• Species-area relationships and the impact of deer-browse in the complex phytogeography of the Haida Gwaii archipelago (Queen Charlotte Islands), British Columbia

  Anthony J. GASTON, Canadian Wildlife Service, National Wildlife Research Centre, Carleton University, Ottawa, Ontario K1A 0H3, Canada, e-mail: tony.gaston@ec.gc.ca
  Stephen A. STOCKTON, Department of Biology, University of Ottawa, Ottawa, Ontario K1N 5N6, Canada.
  Joanna L. SMITH, Laskeek Bay Conservation Society, Box 867, Queen Charlotte City, British Columbia V0T 1S0, Canada.

• Influence of plant abundance on disease incidence in a Mexican tropical forest

  Graciela GARCÍA-GUZMÁN & Rodolfo DIRZO, Departamento de Ecología Evolutiva, Instituto de Ecología, Universidad Nacional Autónoma de México, A.P. 70-275, C. P. 04510, México, D. F. México, e-mail: mggarcia@ecologia.unam.mx

• The effects of 20 years of highway presence on the genetic structure of Rana dalmatina populations

  David LESBARRÈRES, Department of Biology, Laurentian University, Sudbury, Ontario P3E 2C6, Canada, and Laboratoire d?Écologie Animale, Université d'Angers Belle-Beille F-49045 Angers cedex France, e-mail: dlesbarreres@laurentian.ca
  Craig R. PRIMMER, Department of Biological and Environmental Sciences, P.O. Box 65, FI-00014 University of Helsinki, Finland.
  Thierry LODÉ, Laboratoire d?Écologie Animale, Université d'Angers Belle-Beille F-49045 Angers cedex France.
  Juha MERILÄ, Ecological Genetics Research Unit, Department of Biological and Environmental Sciences, P.O. Box 65, FI-00014 University of Helsinki, Finland.

• Joshua tree (Yucca brevifolia) seeds are dispersed by seed-caching rodents

  Stephen B. VANDER WALL, Department of Biology and the Program in Ecology, Evolution and Conservation Biology, University of Nevada, Reno, Nevada 89557, USA, e-mail: sv@unr.edu
  Todd ESQUE, United States Geological Survey, Henderson, Nevada, USA.
  Dustin HAINES, Department of Ecology, Evolution, and Behavior, University of Minnesota, Minneapolis, Minnesota 55455, USA.
  Megan GARNETT, United States Geological Survey, Henderson, Nevada, USA.
  Ben A. WAITMAN, Department of Biology and the Program in Ecology, Evolution and Conservation Biology, University of Nevada, Reno, Nevada 89557, USA, and United States Geological Survey, Henderson, Nevada, USA.

• Nitrogen cycling at treeline: Latitudinal and elevational patterns across a boreal landscape

  Patricia F. LOOMIS, Institute of Arctic Biology, 211 Irving I, University of Alaska?Fairbanks, Alaska 99775, USA.
  Roger W. RUESS, Institute of Arctic Biology, 311 Irving I, University of Alaska?Fairbanks, Alaska 99775, USA.
  Bjartmar SVEINBJÖRNSSON, Department of Biological Sciences, University of Alaska?Anchorage, 3211 Providence Drive, Anchorage, Alaska 99508, USA.
  Knut KIELLAND, Institute of Arctic Biology, 311 Irving I, University of Alaska?Fairbanks, Alaska 99775, USA.