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Karen A. Harper
Researcher at Dalhousie University
Publications - 54
Citations - 3553
Karen A. Harper is an academic researcher from Dalhousie University. The author has contributed to research in topics: Taiga & Tundra. The author has an hindex of 26, co-authored 47 publications receiving 3035 citations. Previous affiliations of Karen A. Harper include Saint Mary's University & Université du Québec à Montréal.
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Journal ArticleDOI
Edge Influence on Forest Structure and Composition in Fragmented Landscapes
Karen A. Harper,S. Ellen Macdonald,Philip J. Burton,Jiquan Chen,Kimberley D. Brosofske,Sari C. Saunders,Eugénie S. Euskirchen,Dar A. Roberts,Malanding S. Jaiteh,Per-Anders Esseen +9 more
TL;DR: In this paper, the magnitude and distance of edge influence are a direct function of the contrast in structure and composition between adjacent communities on either side of the edge, and local factors such as climate, edge characteristics, stand attributes, and biotic factors affect patch contrast.
Journal ArticleDOI
Plant functional trait change across a warming tundra biome
Anne D. Bjorkman,Anne D. Bjorkman,Isla H. Myers-Smith,Sarah C. Elmendorf,Sarah C. Elmendorf,Sarah C. Elmendorf,Signe Normand,Nadja Rüger,Pieter S. A. Beck,Anne Blach-Overgaard,Daan Blok,J. Hans C. Cornelissen,Bruce C. Forbes,Damien Georges,Scott J. Goetz,Kevin C. Guay,Gregory H. R. Henry,Janneke HilleRisLambers,Robert D. Hollister,Dirk Nikolaus Karger,Jens Kattge,Peter Manning,Janet S. Prevéy,Christian Rixen,Gabriela Schaepman-Strub,Haydn J.D. Thomas,Mark Vellend,Martin Wilmking,Sonja Wipf,Michele Carbognani,Luise Hermanutz,Esther Lévesque,Ulf Molau,Alessandro Petraglia,Nadejda A. Soudzilovskaia,Marko J. Spasojevic,Marcello Tomaselli,Tage Vowles,Juha M. Alatalo,Heather D. Alexander,Alba Anadon-Rosell,Alba Anadon-Rosell,Sandra Angers-Blondin,Mariska te Beest,Mariska te Beest,Logan T. Berner,Robert G. Björk,Agata Buchwal,Agata Buchwal,Allan Buras,Katherine S. Christie,Elisabeth J. Cooper,Stefan Dullinger,Bo Elberling,Anu Eskelinen,Anu Eskelinen,Esther R. Frei,Esther R. Frei,Oriol Grau,Paul Grogan,Martin Hallinger,Karen A. Harper,Monique M. P. D. Heijmans,James I. Hudson,Karl Hülber,Maitane Iturrate-Garcia,Colleen M. Iversen,Francesca Jaroszynska,Jill F. Johnstone,Rasmus Halfdan Jørgensen,Elina Kaarlejärvi,Elina Kaarlejärvi,Rebecca A Klady,Sara Kuleza,Aino Kulonen,Laurent J. Lamarque,Trevor C. Lantz,Chelsea J. Little,Chelsea J. Little,James D. M. Speed,Anders Michelsen,Ann Milbau,Jacob Nabe-Nielsen,Sigrid Schøler Nielsen,Josep M. Ninot,Steven F. Oberbauer,Johan Olofsson,Vladimir G. Onipchenko,Sabine B. Rumpf,Philipp R. Semenchuk,Philipp R. Semenchuk,Rohan Shetti,Laura Siegwart Collier,Lorna E. Street,Katharine N. Suding,Ken D. Tape,Andrew J. Trant,Andrew J. Trant,Urs A. Treier,Jean-Pierre Tremblay,Maxime Tremblay,Susanna Venn,Stef Weijers,Tara Zamin,Noémie Boulanger-Lapointe,William A. Gould,David S. Hik,Annika Hofgaard,Ingibjörg S. Jónsdóttir,Ingibjörg S. Jónsdóttir,Janet C. Jorgenson,Julia A. Klein,Borgthor Magnusson,Craig E. Tweedie,Philip A. Wookey,Michael Bahn,Benjamin Blonder,Benjamin Blonder,Peter M. van Bodegom,Benjamin Bond-Lamberty,Giandiego Campetella,Bruno Enrico Leone Cerabolini,F. Stuart Chapin,William K. Cornwell,Joseph M. Craine,Matteo Dainese,Franciska T. de Vries,Sandra Díaz,Brian J. Enquist,Brian J. Enquist,Walton A. Green,Rubén Milla,Ülo Niinemets,Yusuke Onoda,Jenny C. Ordoñez,Wim A. Ozinga,Wim A. Ozinga,Josep Peñuelas,Hendrik Poorter,Hendrik Poorter,Peter Poschlod,Peter B. Reich,Peter B. Reich,Brody Sandel,Brandon S. Schamp,Serge N. Sheremetev,Evan Weiher +146 more
TL;DR: Biome-wide relationships between temperature, moisture and seven key plant functional traits across the tundra and over time show that community height increased with warming across all sites, whereas other traits lagged behind predicted rates of change.
Journal ArticleDOI
The effects of fungal root endophytes on plant growth: a meta-analysis.
TL;DR: Overall plant biomass and nitrogen concentration responses to ascomycetous root endophyte inoculation is neutral to negative, although these results are somewhat confounded by among-study differences in experimental conditions, which undoubtedly contribute to the high levels of variability in plant response seen in the literature.
Journal ArticleDOI
Structure and composition of riparian boreal forest: new methods for analyzing edge influence
Karen A. Harper,S. E. Macdonald +1 more
TL;DR: In this article, the distance of edge influence for forest structure and composition at lakeshore forest edges was quantified by comparing mean values at different positions along the transect to critical values established from a randomization test of interior forest data.
Journal ArticleDOI
Structural development following fire in black spruce boreal forest
Karen A. Harper,Yves Bergeron,Pierre Drapeau,Sylvie Gauthier,Sylvie Gauthier,Louis De Grandpré +5 more
TL;DR: In this article, the authors investigated stand development along a chronosequence on organic, clay and sand sites in black spruce boreal forest in northwestern Quebec, Canada and found that although trends in structural development are similar among site types, productivity and composition affect the timing of developmental stages.