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Ecology and Evolution
USA
2026

D-Index & Metrics

Ecology and Evolution

D-Index
117
Citations
65604
World Ranking
119
National Ranking
50

Research.com Recognitions

  • 2026 - Research.com Ecology and Evolution in United States Leader Award
  • 2025 - Research.com Ecology and Evolution in United States Leader Award

Overview

Ragan M. Callaway is affiliated with the University of Montana in the United States and is active in research primarily within the fields of Agricultural and Biological Sciences and Environmental Science. Their work spans multiple subfields including Nature and Landscape Conservation, Ecology, Evolution, Behavior and Systematics, Plant Science, Agronomy and Crop Science, and Global and Planetary Change.

Callaway has contributed extensively to topics such as Ecology and Vegetation Dynamics Studies, Plant and Animal Studies, Plant Parasitism and Resistance, Agronomic Practices and Intercropping Systems, Rangeland and Wildlife Management, Species Distribution and Climate Change, and Soil Carbon and Nitrogen Dynamics.

The scientist has published frequently in several key venues with the highest number of publications appearing in Trends in Ecology & Evolution and New Phytologist, each featuring seven of their works. Other common journals include Ecology Letters, Journal of Ecology, and Ecology.

Recent notable papers authored or coauthored by Callaway include:

  • Long-term increased grain yield and soil fertility from intercropping (2021), published in Nature Sustainability
  • Priority effects and ecological restoration (2020), published in Restoration Ecology
  • The Ecological Importance of Allelopathy (2021), published in Annual Review of Ecology Evolution and Systematics
  • Belowground facilitation and trait matching: two or three to tango? (2021), published in Trends in Plant Science
  • Plant litter strengthens positive biodiversity-ecosystem functioning relationships over time (2023), published in Trends in Ecology & Evolution

Frequent collaborators include Long Li, Christopher J. Lortie, Jacob E. Lucero, Weiping Zhang, and Róbert W. Pál, with a notable number of coauthored works ranging from 9 to 15 publications per collaborator.

Best Publications

  • Positive interactions in communities.

    Mark D. Bertness;Ragan Callaway

  • Competition and facilitation: a synthetic approach to interactions in plant communities

    Ragan M. Callaway;Lawrence R. Walker

  • Positive interactions among plants

    Ragan M. Callaway

  • Positive interactions among alpine plants increase with stress.

    Ragan M. Callaway;R. W. Brooker;Philippe Choler;Zaal Kikvidze

  • Facilitation in plant communities: the past, the present, and the future

    Rob W. Brooker;Fernando T. Maestre;Ragan M. Callaway;Christopher L. Lortie

  • Invasive Plants Versus Their New and Old Neighbors: A Mechanism for Exotic Invasion

    Ragan M. Callaway;Erik T. Aschehoug

  • Novel Weapons: Invasive Success and the Evolution of Increased Competitive Ability

    Ragan M. Callaway;Wendy M. Ridenour

  • Allelopathy and Exotic Plant Invasion: From Molecules and Genes to Species Interactions

    Harsh P. Bais;Ramarao Vepachedu;Simon Gilroy;Ragan M. Callaway

  • Refining the stress-gradient hypothesis for competition and facilitation in plant communities

    Fernando T. Maestre;Ragan M. Callaway;Fernando Valladares;Fernando Valladares;Christopher J. Lortie

  • Soil biota and exotic plant invasion.

    Ragan M. Callaway;Giles C. Thelen;Alex Rodriguez;William E. Holben

  • How plants communicate using the underground information superhighway.

    Harsh Pal Bais;Sang-Wook Park;Tiffany L Weir;Ragan M Callaway

  • A biogeographical approach to plant invasions: the importance of studying exotics in their introduced and native range

    José L. Hierro;John L. Maron;Ragan M. Callaway

  • Invasive Plant Suppresses the Growth of Native Tree Seedlings by Disrupting Belowground Mutualisms

    Kristina A Stinson;Stuart A Campbell;Jeff R Powell;Benjamin E Wolfe

  • Positive interactions and interdependence in plant communities

    Ragan M. Callaway

  • Soil biota and invasive plants

    Kurt O. Reinhart;Ragan M. Callaway

  • FACILITATION AND COMPETITION ON GRADIENTS IN ALPINE PLANT COMMUNITIES

    Philippe Choler;Richard Michalet;Ragan M. Callaway

  • Allelopathy and exotic plant invasion

    José L. Hierro;José L. Hierro;Ragan M. Callaway

  • Do biotic interactions shape both sides of the humped-back model of species richness in plant communities?

    Richard Michalet;Robin W. Brooker;Lohengrin A. Cavieres;Zaal Kikvidze

  • Salt Marsh Plant Zonation: The Relative Importance of Competition and Physical Factors

    Steven C. Pennings;Ragan M. Callaway

  • Rethinking plant community theory

    Christopher J. Lortie;Rob W. Brooker;Phillipe Choler;Zaal Kikvidze

  • PHENOTYPIC PLASTICITY AND INTERACTIONS AMONG PLANTS

    Ragan M. Callaway;Steven C. Pennings;Christina L. Richards

Frequent Co-Authors

Richard Michalet
Richard Michalet University of Bordeaux
Christopher J. Lortie
Christopher J. Lortie York University
Zaal Kikvidze
Zaal Kikvidze Ilia State University
John L. Maron
John L. Maron University of Montana
Francisco I. Pugnaire
Francisco I. Pugnaire Spanish National Research Council
Dean E. Pearson
Dean E. Pearson United States Department of Agriculture
Jorge M. Vivanco
Jorge M. Vivanco Colorado State University
Leslie A. Weston
Leslie A. Weston Charles Sturt University
Lohengrin A. Cavieres
Lohengrin A. Cavieres University of Concepción
Rob W. Brooker
Rob W. Brooker James Hutton Institute

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