Predicting invasion in grassland ecosystems: is exotic dominance the real embarrassment of richness?

Authors
Seabloom, Eric W.; Borer, Elizabeth T.; Buckley, Yvonne; Cleland, Elsa E.; Kendi, Davies; Firn, Jennifer; Hartpole, Stanley W.; Hautier, Yann; Lind, Eric; MacDougall, Andrew; Orrock, John L.; Prober, Suzanne M.; Adler, Peter; Alberti, Juan; Anderson, T. Michael; Bakker, Jonathan D.; Biederman, Lori A.; Blumenthal, Dana; Browns, Cynthia S.; Brudvig, Lars A.; Caldeira, Maria; Chu, Chengjin; Crawley, Michel; Daleo, Pedro; Damschen, Ellen I.; D'antonio, Carla; Decrappeo, Nicole; Dickman, Chris; Du, Guozhen; Fay, Philip; Frater, Paul; Gruner, Daniel S.; Hagenah, Nicole; Hector, Andrew; Helm, Avellina; Hillebrand, Helmut; Hofmockel, Kirsten; Humphries, Hope; Iribarne, Oscar Osvaldo; Jin, Virginia L.; Kay, Adam; Kirkman, Kevin; Klein, Julia; Knops, Johannes M. H.; La Pierre, Kimberly; Ladwig, Laura M.; Lambrinos, John G.; Leakey, Andrew; Li, Qi; Li, Wei; McCulley, Rebecca; Melbourne, Brett; Mitchell, Charles; Moore, Joslin; Morgan, John; Mortensen, Brent; O'Halloran, Lydia; Pärtel, Meelis; Pascual, Jesus Maria; Pyke, David A.; Risch, Anita; Salguero Goméz, Roberto; Sankaran, Mahesh; Schuetz, Martin; Simonsen, Anna; Smith, Melinda; Stevens, Carly; Sullivan, Lauren; Wardle, Glenda M.; Wolkovich, Elizabeth M.; Wragg, Peter D.; Wright, Justin; Yang, Louie
Publication Year
2013
Language
English
Format
article
Status
Published version
Description
Invasions have increased the size of regional species pools, but are typically assumed to reduce native diversity. 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.
Fil: Seabloom, Eric W.. University of Minnesota; Estados Unidos
Fil: Borer, Elizabeth T.. University of Minnesota; Estados Unidos
Fil: Buckley, Yvonne. The University Of Queensland; Australia
Fil: Cleland, Elsa E.. University of California, San Diego; Estados Unidos
Fil: Kendi, Davies. State University of Colorado Boulder; Estados Unidos
Fil: Firn, Jennifer. Queensland University of Technology. Brisbane; Australia
Fil: Hartpole, Stanley W.. Iowa State University; Estados Unidos
Fil: Hautier, Yann. University of Zurich; Suiza
Fil: Lind, Eric. Universidad de Minnesota; Estados Unidos
Fil: MacDougall, Andrew. University of Guelph; Canadá
Fil: Orrock, John L.. University of Wisconsin; Estados Unidos
Fil: Prober, Suzanne M.. CSIRO Ecosystem Sciences; Australia
Fil: Adler, Peter. Utah State University; Estados Unidos
Fil: Alberti, Juan. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencia Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina
Fil: Anderson, T. Michael. Wake Forest University; Estados Unidos
Fil: Bakker, Jonathan D.. University of Washington; Estados Unidos
Fil: Biederman, Lori A.. Iowa State University; Estados Unidos
Fil: Blumenthal, Dana. Rangeland Resources Research Unit; Estados Unidos
Fil: Browns, Cynthia S.. State University of Colorado - Fort Collins; Estados Unidos
Fil: Brudvig, Lars A.. Michigan State University; Estados Unidos
Fil: Caldeira, Maria. Technical University of Lisbon; Portugal
Fil: Chu, Chengjin. Lanzhou University; China
Fil: Crawley, Michel. Imperial College London; Reino Unido
Fil: Daleo, Pedro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencia Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina
Fil: Damschen, Ellen I.. University of Wisconsin; Estados Unidos
Fil: D'antonio, Carla. University of California; Estados Unidos
Fil: Decrappeo, Nicole. Geological Survey Forest and Rangeland Ecosystem Science Center; Estados Unidos
Fil: Dickman, Chris. University of Sydney; Australia
Fil: Du, Guozhen. Lanzhou University; China
Fil: Fay, Philip. Grassland Soil and Water Research Lab; Estados Unidos
Fil: Frater, Paul. Iowa State University; Estados Unidos
Fil: Gruner, Daniel S.. University of Queensland; Australia
Fil: Hagenah, Nicole. University of KwaZulu-Natal; Sudáfrica
Fil: Hector, Andrew. University of Zurich; Suiza
Fil: Helm, Avellina. University Of Tartu.; Estonia
Fil: Hillebrand, Helmut. Carl-von-Ossietzky University; Alemania
Fil: Hofmockel, Kirsten. Iowa State University; Estados Unidos
Fil: Humphries, Hope. State University of Colorado - Fort Collins; Estados Unidos
Fil: Iribarne, Oscar Osvaldo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencia Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina
Fil: Jin, Virginia L.. Agroecosystem Management Research Unit; Estados Unidos
Fil: Kay, Adam. University of St. Thomas; Estados Unidos
Fil: Kirkman, Kevin. University of KwaZulu-Natal; Estonia
Fil: Klein, Julia. State University of Colorado - Fort Collins; Estados Unidos
Fil: Knops, Johannes M. H.. University Of Nebraska; Estados Unidos
Fil: La Pierre, Kimberly. Yale University; Estados Unidos
Fil: Ladwig, Laura M.. University Of New Mexico; Estados Unidos
Fil: Lambrinos, John G.. Oregon State University; Estados Unidos
Fil: Leakey, Andrew. University of Illinois at Urbana-Champaign; Estados Unidos
Fil: Li, Qi. Northwest Institute of Plateau Biology, Chinese Academy of Sciences; China
Fil: Li, Wei. Southwest Forestry University; China
Fil: McCulley, Rebecca. University Of Kentucky; Estados Unidos
Fil: Melbourne, Brett. State University of Colorado Boulder; Estados Unidos
Fil: Mitchell, Charles. University of North Carolina; Estados Unidos
Fil: Moore, Joslin. Australian Research Centre for Urban Ecology; Australia
Fil: Morgan, John. La Trobe University; Australia
Fil: Mortensen, Brent. Iowa State University; Estados Unidos
Fil: O'Halloran, Lydia. Oregon State University; Estados Unidos
Fil: Pärtel, Meelis. University Of Tartu.; Estonia
Fil: Pascual, Jesus Maria. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencia Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina
Fil: Pyke, David A.. University of California; Estados Unidos
Fil: Risch, Anita. Swiss Federal Institute For Forest, Snow And Landscape Research; Suiza
Fil: Salguero Goméz, Roberto. The University Of Queensland; Australia
Fil: Sankaran, Mahesh. National Centre for Biological Sciences; India
Fil: Schuetz, Martin. Swiss Federal Institute For Forest, Snow And Landscape Research; Suiza
Fil: Simonsen, Anna. University of Toronto; Canadá
Fil: Smith, Melinda. State University of Colorado - Fort Collins; Estados Unidos
Fil: Stevens, Carly. Lancaster Environment Center; Canadá
Fil: Sullivan, Lauren. Iowa State University; Estados Unidos
Fil: Wardle, Glenda M.. University of Sydney; Australia
Fil: Wolkovich, Elizabeth M.. University of British Columbia; Canadá
Fil: Wragg, Peter D.. The University Of Queensland; Australia
Fil: Wright, Justin. University of Duke; Estados Unidos
Fil: Yang, Louie. University of California; Estados Unidos
Subject
INVASION
GRASSLANDS
Bioquímica y Biología Molecular
Ciencias Biológicas
CIENCIAS NATURALES Y EXACTAS
Access level
Restricted access
License
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repository
CONICET Digital (CONICET)
Institution
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identifier
oai:ri.conicet.gov.ar:11336/29305