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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
environmental science
Predicting invasion in grassland ecosystems: Is exotic dominance the real embarrassment of richness?
Global Change Biology, Volume 19, No. 12, Year 2013
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Description
Invasions have increased the size of regional species pools, but are typically assumed to reduce native diversity. However, global-scale tests of this assumption have been elusive because of the focus on exotic species richness, rather than relative abundance. This is problematic because low invader richness can indicate invasion resistance by the native community or, alternatively, dominance by a single exotic species. Here, we used a globally replicated study to quantify relationships between exotic richness and abundance in grass-dominated ecosystems in 13 countries on six continents, ranging from salt marshes to alpine tundra. We tested effects of human land use, native community diversity, herbivore pressure, and nutrient limitation on exotic plant dominance. Despite its widespread use, exotic richness was a poor proxy for exotic dominance at low exotic richness, because sites that contained few exotic species ranged from relatively pristine (low exotic richness and cover) to almost completely exotic-dominated ones (low exotic richness but high exotic cover). Both exotic cover and richness were predicted by native plant diversity (native grass richness) and land use (distance to cultivation). Although climate was important for predicting both exotic cover and richness, climatic factors predicting cover (precipitation variability) differed from those predicting richness (maximum temperature and mean temperature in the wettest quarter). Herbivory and nutrient limitation did not predict exotic richness or cover. Exotic dominance was greatest in areas with low native grass richness at the site- or regional-scale. Although this could reflect native grass displacement, a lack of biotic resistance is a more likely explanation, given that grasses comprise the most aggressive invaders. These findings underscore the need to move beyond richness as a surrogate for the extent of invasion, because this metric confounds monodominance with invasion resistance. Monitoring species' relative abundance will more rapidly advance our understanding of invasions. © 2013 John Wiley & Sons Ltd.
Authors & Co-Authors
Seabloom, Eric W.
United States, Minneapolis
University of Minnesota Twin Cities
Borer, Elizabeth T.
United States, Minneapolis
University of Minnesota Twin Cities
Buckley, Yvonne M.
Australia, Brisbane
The University of Queensland
Cleland, Elsa E.
United States, La Jolla
University of California, San Diego
Davies, Kendi F.
United States, Boulder
University of Colorado Boulder
Firn, Jennifer L.
Australia, Brisbane
Queensland University of Technology
Harpole, William Stanley
United States, Ames
Iowa State University
Hautier, Yann
United States, Minneapolis
University of Minnesota Twin Cities
Switzerland, Zurich
Universität Zürich
Lind, Eric M.
United States, Minneapolis
University of Minnesota Twin Cities
MacDougall, Andrew S.
Canada, Guelph
University of Guelph
Orrock, John L.
United States, Madison
University of Wisconsin-madison
Prober, Suzanne Mary
Australia, Perth
Csiro Ecosystem Sciences
Adler, Peter B.
United States, Logan
Utah State University
Alberti, Juan
Argentina, Buenos Aires
Consejo Nacional de Investigaciones Científicas y Técnicas
Anderson, Todd M.
United States, Winston Salem
Wake Forest University
Bakker, Jonathan D.
United States, Seattle
University of Washington
Biederman, Lori A.
United States, Ames
Iowa State University
Blumenthal, Dana M.
United States, Washington, D.c.
Usda Agricultural Research Service
Brown, Cynthia S.
United States, Fort Collins
Colorado State University
Brudvig, Lars A.
United States, East Lansing
Michigan State University
Caldeira, Maria C.
Portugal, Lisbon
Instituto Superior de Agronomia, Universidade de Lisboa
Chu, Chengjin Jin
China, Lanzhou
Lanzhou University
Crawley, Michael J.
United Kingdom, London
Imperial College London
Daleo, Pedro
Argentina, Buenos Aires
Consejo Nacional de Investigaciones Científicas y Técnicas
Damschen, Ellen I.
United States, Madison
University of Wisconsin-madison
D'Antonio, Carla M.
United States, Santa Barbara
University of California, Santa Barbara
Decrappeo, Nicole M.
United States, Corvallis
Usgs Forest and Rangeland Ecosystem Science Center
Dickman, Chris R.
Australia, Sydney
The University of Sydney
Du, Guozhen
China, Lanzhou
Lanzhou University
Fay, Philip A.
United States, Washington, D.c.
United States Department of Agriculture
Frater, Paul
United States, Ames
Iowa State University
Gruner, Daniel S.
United States, College Park
University of Maryland, College Park
Hagenah, Nicole
South Africa, Durban
University of Kwazulu-natal
United States, New Haven
Yale University
Hector, Andy
Switzerland, Zurich
Universität Zürich
Helm, Aveliina
Estonia, Tartu
Ökoloogia ja Maateaduste Instituut
Hillebrand, Helmut
Germany, Oldenburg
Universität Oldenburg
Hofmockel, Kirsten S.
United States, Ames
Iowa State University
Humphries, Hope C.
United States, Boulder
University of Colorado Boulder
Iribarne, Oscar Osvaldo
Argentina, Buenos Aires
Consejo Nacional de Investigaciones Científicas y Técnicas
Jin, Virginia L.
United States, Lincoln
Usda Agricultural Research Service - Lincoln, Nebraska
Kay, Adam
United States, Saint Paul
University of St. Thomas, Minnesota
Kirkman, Kevin P.
South Africa, Durban
University of Kwazulu-natal
Klein, Julia A.
United States, Fort Collins
Colorado State University
Knops, Johannes M.H.
United States, Lincoln
School of Biological Sciences
la Pierre, Kimberly J.
United States, New Haven
Yale University
Ladwig, Laura M.
United States, Albuquerque
The University of new Mexico
Lambrinos, John G.
United States, Corvallis
Oregon State University
Leakey, Andrew D.B.
United States, Urbana
University of Illinois Urbana-champaign
Li, Qi
China, Xining
Northwest Institute of Plateau Biology
Li, Wei
China, Kunming
Southwest Forestry University
McCulley, Rebecca L.
United States, Lexington
University of Kentucky College of Agriculture, Food and Environment
Melbourne, Brett
United States, Boulder
University of Colorado Boulder
Mitchell, Charles E.
United States, Chapel Hill
The University of North Carolina at Chapel Hill
Moore, Joslin L.
Australia, Melbourne
University of Melbourne
Morgan, John W.
Australia, Melbourne
La Trobe University
Mortensen, Brent
United States, Ames
Iowa State University
O'Halloran, Lydia R.
United States, Corvallis
Oregon State University
Pärtel, Meelis
Estonia, Tartu
Ökoloogia ja Maateaduste Instituut
Pascual, Jesús
Argentina, Buenos Aires
Consejo Nacional de Investigaciones Científicas y Técnicas
Pyke, David A.
United States, Corvallis
Usgs Forest and Rangeland Ecosystem Science Center
Risch, Anita C.
Switzerland, Birmensdorf
Eidgenössische Forschungsanstalt Für Wald, Schnee Und Landschaft Wsl
Salguero-Gómez, Roberto
Australia, Brisbane
The University of Queensland
Sankaran, Mahesh
India, Bengaluru
National Centre for Biological Sciences
Schuetz, Martin
Switzerland, Birmensdorf
Eidgenössische Forschungsanstalt Für Wald, Schnee Und Landschaft Wsl
Simonsen, Anna
Canada, Toronto
University of Toronto
Smith, Melinda D.
United States, Fort Collins
Colorado State University
Stevens, Carly J.
United Kingdom, Lancaster
Lancaster Environment Centre
Sullivan, Lauren
United States, Ames
Iowa State University
Wardle, Glenda M.
Australia, Sydney
The University of Sydney
Wolkovich, E. M.
Canada, Vancouver
The University of British Columbia
Wragg, P. D.
United States, Minneapolis
University of Minnesota Twin Cities
Wright, Justin P.
United States, Durham
Duke University
Yang, Louie
United States, Davis
University of California, Davis
Statistics
Citations: 85
Authors: 73
Affiliations: 48
Identifiers
Doi:
10.1111/gcb.12370
ISSN:
13541013
e-ISSN:
13652486
Research Areas
Environmental