R
Ragan M. Callaway
Researcher at University of Montana
Publications - 310
Citations - 44979
Ragan M. Callaway is an academic researcher from University of Montana. The author has contributed to research in topics: Introduced species & Competition (biology). The author has an hindex of 95, co-authored 290 publications receiving 41012 citations. Previous affiliations of Ragan M. Callaway include National University of La Pampa.
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Journal ArticleDOI
Diversity Increases Indirect Interactions, Attenuates the Intensity of Competition, and Promotes Coexistence
TL;DR: In a field experiment, it is found that competition among native perennial plants in multispecies assemblages was far weaker than competition between those same species in pairwise arrangements and that indirect interactions appeared to weaken direct competitive effects.
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Negative plant‐soil feedbacks increase with plant abundance, and are unchanged by competition
John L. Maron,Alyssa Laney Smith,Alyssa Laney Smith,Yvette K. Ortega,Dean E. Pearson,Dean E. Pearson,Ragan M. Callaway +6 more
TL;DR: The results suggest that abundant plants accrue species-specific soil pathogens to a greater extent than rare species, and negative feedbacks may be critical for preventing abundant species from becoming even more abundant thanRare species.
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Facilitation in the conceptual melting pot
Rob W. Brooker,Ragan M. Callaway +1 more
TL;DR: It is believed that establishing facilitation as an independent concept has driven substantial progress towards a clearer understanding of how ecological systems work and this field will continue to make rapid progress and aid ecological understanding in general.
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Identification and localization of bioactive naphthoquinones in the roots and rhizosphere of Paterson's curse (Echium plantagineum), a noxious invader
Xiaocheng Zhu,Dominik Skoneczny,Jeffrey D. Weidenhamer,James M Mwendwa,Paul A. Weston,Geoff M. Gurr,Ragan M. Callaway,Leslie A. Weston +7 more
TL;DR: Napthoquinones, antimicrobial and phytotoxic metabolites that are involved in plant defence, are produced and released into the rhizosphere by root hairs and root periderm tissue of Echium plantagineum.
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Exotic invasive plants increase productivity, abundance of ammonia-oxidizing bacteria and nitrogen availability in intermountain grasslands
Morgan Luce McLeod,Cory C. Cleveland,Ylva Lekberg,John L. Maron,Laurent Philippot,David Bru,Ragan M. Callaway +6 more
TL;DR: This research presents a probabilistic analysis of the response of Yellowstone grizzly bears to the presence of infectious disease and its effects on their numbers and habits.