Research Topics
| Ragan M CallawaySummaryAffiliation: University of Montana Country: USA Publications
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Publications
What have exotic plant invasions taught us over the past 20 years?Ragan M Callaway
Division of Biological Sciences, University of Montana, Missoula, MT 59812, USA
Trends Ecol Evol 21:369-74. 2006..Most importantly, the study of invasions has resulted in significant intellectual shifts in the way that old paradigms are perceived by ecologists and have led us into new and uncharted territory...- Novel weapons: invasive plant suppresses fungal mutualists in America but not in its native EuropeRagan M Callaway
Division of Biological Sciences, University of Montana, Missoula, Montana 59812, USA
Ecology 89:1043-55. 2008..These results indicate that phytochemicals, benign to resistant mycorrhizal symbionts in the home range, may be lethal to naïve native mutualists in the introduced range and indirectly suppress the plants that rely on them... - Escape from competition: neighbors reduce Centaurea stoebe performance at home but not awayRagan M Callaway
Division of Biological Sciences, University of Montana, Missoula, Montana 59812, USA
Ecology 92:2208-13. 2011..stoebe in parts of North America... 
Plant neighbor identity influences plant biochemistry and physiology related to defenseAmanda K Broz
Department of Horticulture and Landscape Architecture and Center for Rhizosphere Biology, Colorado State University, Fort Collins, CO 80523, USA
BMC Plant Biol 10:115. 2010..Here we tested whether or not individuals of the invasive exotic weed, Centaurea maculosa, would modulate their defensive strategy in response to different plant neighbors...- Soil biota and exotic plant invasionRagan M Callaway
Division of Biological Sciences, The University of Montana, Missoula, Montana 59812, USA
Nature 427:731-3. 2004..But in soils from North America, Centaurea cultivates soil biota with increasingly positive effects on itself, which may contribute to the success of this exotic species in North America... - Biotic resistance via granivory: establishment by invasive, naturalized, and native asters reflects generalist preferenceDean E Pearson
Rocky Mountain Research Station, U S D A Forest Service, Missoula, Montana 59801, USA
Ecology 92:1748-57. 2011.... - Fungal endophytes directly increase the competitive effects of an invasive forbErik T Aschehoug
Department of Biology HS104, University of Montana, 32 Campus Drive, Missoula, Montana 59812, USA
Ecology 93:3-8. 2012..However, our results are the first to demonstrate such effects of a fungal endophyte infecting an invasive forb, and one of the few to show that endophyte effects on competition do not have to be mediated through herbivory... - Weed-biocontrol insects reduce native-plant recruitment through second-order apparent competitionDean E Pearson
Rocky Mountain Research Station, USDA Forest Service, 800 E Beckwith Avenue, Missoula, Montana 59801, USA
Ecol Appl 18:1489-500. 2008.... - Invasion through quantitative effects: intense shade drives native decline and invasive successKurt O Reinhart
The University of Montana, Division of Biological Sciences, Missoula 59812, USA
Ecol Appl 16:1821-31. 2006..Further research is necessary to determine whether the effect of nonnative plant-driven changes on light quantity and quality is a widespread mechanism negatively affecting resident species and facilitating invasion by nonnatives... - Effects of soil biota from different ranges on Robinia invasion: acquiring mutualists and escaping pathogensRagan M Callaway
Division of Biological Sciences, University of Montana, Missoula, Montana 59812, USA
Ecology 92:1027-35. 2011.... 
Plant behavioural ecology: dynamic plasticity in secondary metabolitesKerry L Metlen
Division of Biological Sciences, The University of Montana, 32 Campus Drive DBS HS 104, Missoula, MT 59812, USA
Plant Cell Environ 32:641-53. 2009..Biochemical behaviours extend beyond the plant kingdom; however, they clearly illustrate the capacity for plants to behave in ways that closely mirror the classic definitions and research approaches applied to behaviour in animals...- Positive interactions among alpine plants increase with stressRagan M Callaway
Division of Biological Sciences, University of Montana, Missoula, Montana 59812, USA
Nature 417:844-8. 2002..Furthermore, across all high and low sites positive interactions are more important at sites with low temperatures in the early summer, but competition prevails at warmer sites... - Facilitation by Pinus flexilis during succession: a hierarchy of mechanisms benefits other plant speciesDayna Baumeister
Division of Biological Sciences, University of Montana, Missoula, Montana 59812, USA
Ecology 87:1816-30. 2006..If the effects of positive or competitive mechanisms are often hierarchical, then studies of isolated mechanisms may not accurately assess their importance in nature... - Allocating nitrogen away from a herbivore: a novel compensatory response to root herbivoryBeth A Newingham
Division of Biological Sciences, University of Montana, Missoula, MT 59812, USA
Oecologia 153:913-20. 2007..To our knowledge, shifting N allocation away from a root herbivore has not been reported and provides a plausible mechanism for the host plant to overcome an otherwise devastating effect of a root herbivore-induced N deficit... - Neo-allopatry and rapid reproductive isolationDaniel Montesinos
Division of Biological Sciences, University of Montana, Missoula, Montana 59812, USA
Am Nat 180:529-33. 2012..Whether reproductive isolation has evolved following the introduction of other species is unknown, but additional cases are likely, considering the large number of neo-allopatric species... - Disturbance facilitates invasion: the effects are stronger abroad than at homeJos L Hierro
Division of Biological Sciences, University of Montana, Missoula, MT 59812, USA
Am Nat 168:144-56. 2006..solstitialis plants, while Californian and Argentinean soil biota did not. We suggest that escape from soil pathogens may contribute to the disproportionately powerful effect of disturbance in introduced regions... - Can plant biochemistry contribute to understanding of invasion ecology?- Inderjit
Centre for Environmental Management of Degraded Ecosystems CEMDE, University of Delhi, Delhi 110007, India
Trends Plant Sci 11:574-80. 2006..In this Opinion article, we revise and expand this biochemical hypothesis and discuss experimental and conceptual advances and limitations... - Allelopathy and exotic plant invasion: from molecules and genes to species interactionsHarsh P Bais
Department of Horticulture and Landscape Architecture, Cell and Molecular Biology Program, and Graduate Degree Program in Ecology, Colorado State University, Fort Collins, CO 80523, USA
Science 301:1377-80. 2003..Our results support a "novel weapons hypothesis" for invasive success... - Invasive plant suppresses the growth of native tree seedlings by disrupting belowground mutualismsKristina A Stinson
Harvard Forest, Harvard University, Petersham, Massachusetts, USA
PLoS Biol 4:e140. 2006..Our results elucidate an indirect mechanism by which invasive plants can impact native flora, and may help explain how this plant successfully invades relatively undisturbed forest habitat... - Soil biota and invasive plantsKurt O Reinhart
Department of Biology, Indiana University, Jordan Hall Room 127, 1001 East 3rd Street, Bloomington, IN 47405 3700, USA
New Phytol 170:445-57. 2006.... - Do biotic interactions shape both sides of the humped-back model of species richness in plant communities?Richard Michalet
Community Ecology Group, UMR INRA 1202 BIOGECO, University Bordeaux 1, 33405 Talence, France
Ecol Lett 9:767-73. 2006..It is clear that explicit consideration of concurrent changes in stress-tolerant and competitive species enhances our capacity to explain and interpret patterns in plant community diversity with respect to environmental severity... - Modern Quaternary plant lineages promote diversity through facilitation of ancient Tertiary lineagesAlfonso Valiente-Banuet
Departamento de Ecologia de la Biodiversidad, Instituto de Ecologia, Universidad Nacional Autonoma de Mexico, A P 70 275, C P 04510 Mexico D F, Mexico
Proc Natl Acad Sci U S A 103:16812-7. 2006.... - [Selectivity and environmental variations in herbivory by Orthoptera]Emmanuel Corcket
Laboratoire écosystèmes et changements environnementaux, Centre de Biologie Alpine, Universite Joseph Fourier, BP 53, 38041 Grenoble, France
C R Biol 325:155-64. 2002..The coexistence of different hypothesis of herbivory control may depend on the studied system and specifically on the type of herbivore involved... - Phytotoxic effects of (+/-)-catechin in vitro, in soil, and in the field- Inderjit
Centre for Environmental Management of Degraded Ecosystems, University of Delhi, Delhi, India
PLoS ONE 3:e2536. 2008.... - Biological control agents elevate hantavirus by subsidizing deer mouse populationsDean E Pearson
Ecol Lett 9:443-50. 2006..Host specificity alone does not ensure safe biological control. To minimize indirect risks to non-target species, biological control agents must suppress pest populations enough to reduce their own numbers... - Plant ecology: family rootsRagan M Callaway
Nature 448:145-7. 2007 - Oxalate contributes to the resistance of Gaillardia grandiflora and Lupinus sericeus to a phytotoxin produced by Centaurea maculosaTiffany L Weir
Department of Horticulture and Landscape Architecture, Graduate Program in Cell and Molecular Biology, Colorado State University, Fort Collins, 80523, USA
Planta 223:785-95. 2006..Heynh grown in vitro alleviated the phytotoxic effects of catechin, supporting the field experiments and suggesting that root-secreted oxalate may also act as a chemical facilitator for plant species that do not secrete the compound... - How plants communicate using the underground information superhighwayHarsh Pal Bais
Department of Horticulture and Landscape Architecture, Colorado State University, Fort Collins, CO 80523 1173, USA
Trends Plant Sci 9:26-32. 2004....