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Diverse perennial crop mixtures sustain higher productivity over time based on ecological complementarity

Published online by Cambridge University Press:  19 April 2011

Valentín D. Picasso ,
E. Charles Brummer ,
Matt Liebman ,
Philip M. Dixon  and
Brian J. Wilsey
Valentín D. Picasso*
Affiliation:
Departamento de Producción Animal y Pasturas, Facultad de Agronomía, Universidad de la República, Garzón 780, Montevideo 12900, Uruguay.
E. Charles Brummer
Affiliation:
The Samuel Roberts Noble Foundation, 2510 Sam Noble Parkway, Ardmore, OK 73401, USA.
Matt Liebman
Affiliation:
Department of Agronomy, Iowa State University, Ames, IA 50011, USA.
Philip M. Dixon
Affiliation:
Department of Statistics, Iowa State University, Ames, IA 50011, USA.
Brian J. Wilsey
Affiliation:
Department of Ecology, Organismal and Evolutionary Biology, Iowa State University, Ames, IA 50011, USA.
*
*Corresponding author: [email protected]
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Abstract

Cropping systems that rely on renewable energy and resources and are based on ecological principles could be more stable and productive into the future than current monoculture systems with serious unintended environmental consequences such as soil erosion and water pollution. In nonagricultural systems, communities with higher species diversity have higher productivity and provide other ecosystem services. However, communities of well-adapted crop species selected for biomass production may respond differently to increasing diversity. Diversity effects may be due to complementarity among species (complementary resource use and facilitative interactions) or positive selection effects (e.g., species with higher productivity dominate the mixture), and these effects may change over time or across environments. Our goal was to identify the ecological mechanisms causing diversity effects in a biodiversity experiment using agriculturally relevant species, and evaluate the implications for the design of sustainable cropping systems. We seeded seven perennial forage species in a replicated field experiment at two locations in Iowa, USA, and evaluated biomass productivity of monocultures and two- to six-species mixtures over 3 years after the establishment year under management systems of contrasting intensity: one or three harvests per year. Productivity increased with seeded species richness in all environments, and the positive relationship did not change over time. Polyculture overyielding was due to complementarity among species in the community rather than to selection effects of individual species. Complementarity increased as a log-linear function of species richness in all environments, and this trend was consistent across years. Legume–grass facilitation may explain much of this complementarity effect. Although individual species with high biomass production had a major effect on productivity of mixtures, the species producing the highest biomass in monoculture changed over the years in most environments. Furthermore, transgressive overyielding was observed and was more prevalent in later years, in some environments. We conclude that choosing a single well-adapted species for maximizing productivity may not be the best alternative over the long term and that high levels of species diversity should be included in the design of productive and ecologically sound agricultural systems.

Keywords

monoculturepolyculturerichnessoveryieldingtransgressive overyieldinglegumegrass
Type
Research Papers
Information
Renewable Agriculture and Food Systems , Volume 26 , Issue 4 , December 2011 , pp. 317 - 327
Copyright
Copyright © Cambridge University Press 2011

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References

1Francis, C. and Doran, J. 2010. Editorial: ‘food for life’: looking beyond the horizon. Renewable Agriculture and Food Systems 25:1–2.CrossRefGoogle Scholar
2Liebman, M. 1995. Polyculture cropping systems. In: Altieri, M. (ed.). Agroecology: the Science of Sustainable Agriculture. 2nd ed.Westview Press, Boulder, CO. p. 205–218.Google Scholar
3Jackson, W. 2002. Natural systems agriculture: a truly radical alternative. Agriculture Ecosystems and Environment 88:111–117.Google Scholar
4Schulte, L.A., Liebman, M., Asbjornsen, H. and Crow, T.R. 2006. Agroecosystem restoration through strategic integration of perennials. Journal of Soil and Water Conservation 61:164A–169A.Google Scholar
5Cox, T.S., Glover, J.D., Van Tassel, D.L., Cox, C.M. and DeHaan, L.R. 2006. Prospects for developing perennial-grain crops. Bioscience 56:649–659.CrossRefGoogle Scholar
6Glover, J.D., Reganold, J.P., Bell, L.W., Borevitz, J., Brummer, E.C., Buckler, E.S., Cox, C.M., Cox, T.S., Crews, T.E., Culman, S.W., DeHaan, L.R., Eriksson, D., Gill, B.S., Holland, J., Hu, F., Hulke, B.S., Ibrahim, A.M.H., Jackson, W., Jones, S.S., Murray, S.C., Paterson, A.H., Ploschuk, E., Sacks, E.J., Snapp, S., Tao, D., Van Tassel, D.L., Wade, L.J., Wyse, D.L. and Xu, Y. 2010. Increased food and ecosystem security via perennial grains. Science 328:1638–1639.Google Scholar
7Loreau, M., Naeem, S., Inchausti, P., Bengtsson, J., Grime, J.P., Hector, A., Hooper, D.U., Huston, M.A., Raffaelli, D., Schmid, B., Tilman, D. and Wardle, D.A. 2001. Biodiversity and ecosystem functioning: current knowledge and future challenges. Science 294:804–808.Google Scholar
8Fargione, J., Tilman, D., Dybzinski, R., Lambers, J.H.R., Clark, C., Harpole, W.S., Knops, J.M.H., Reich, P.B. and Loreau, M. 2007. From selection to complementarity: shifts in the causes of biodiversity-productivity relationships in a long-term biodiversity experiment. Proceedings of the Royal Society B: Biological Sciences 274:871–876.CrossRefGoogle Scholar
9Hille-Ris Lambers, J., Harpole, S., Tilman, D., Knops, J. and Reich, P.B. 2004. Mechanisms responsible for the positivediversity – productivity relationship in Minnesota grasslands. Ecology Letters 7:661–668.CrossRefGoogle Scholar
10Loreau, M. and Hector, A. 2001. Partitioning selection and complementarity in biodiversity experiments. Nature 412:72–76.Google Scholar
11Tilman, D., Reich, P.B. and Knops, J.M.H. 2006. Biodiversity and ecosystem stability in a decade-long grassland experiment. Nature 441:629–632.CrossRefGoogle Scholar
12Hector, A., Schmid, B., Beierkuhnlein, C., Caldeira, M.C., Diemer, M., Dimitrakopoulos, P.G., Finn, J.A., Freitas, H., Giller, P.S., Good, J., Harris, J., Hogberg, P., Huss-Danell, K., Joshi, J., Jumpponen, A., Korner, C., Leadley, P.W., Loreau, M., Minns, A., Mulder, C.P.H., O'Donnovan, G., Otway, S.J., Pereira, J.S., Prinz, A., Read, D.J., Scherer-Lorenzen, M., Schulze, E.-D., Siamantziouras, A.S.D., Spehn, E.M., Terry, A.C., Troumbis, A.Y., Woodward, F.I., Yachi, S. and Lawton, J.H. 1999. Plant diversity and productivity experiments in European grasslands. Science 286:1123–1127.CrossRefGoogle ScholarPubMed
13Hooper, D.U., Chapin, F.S., Ewel, J.J., Hector, A., Inchausti, P., Lavorel, S., Lawton, J.H., Lodge, D.M., Loreau, M., Naeem, S., Schmid, B., Setala, H., Symstad, A.J., Vandermeer, J., and Wardle, D.A. 2005. Effects of biodiversity on ecosystem functioning: a consensus of current knowledge. Ecological Monographs 75:3–35.Google Scholar
14Srivastava, D.S. and Vellend, M. 2005. Biodiversity-ecosystem function research: is it relevant to conservation? Annual Review of Ecology Evolution and Systematics 36:267–294.Google Scholar
15Picasso, V.D., Brummer, E.C., Liebman, M., Dixon, P.M., and Wilsey, B.J. 2008. Crop species diversity affects productivity and weed suppression in perennial polycultures under two management strategies. Crop Science 48:331–342.Google Scholar
16DeHaan, L., Wesiberg, S., Tilman, D., and Fornara, D. 2010. Harvested perennial grasslands: ecological models for farming's perennial future. Agriculture, Ecosystems and Environment 137:33–38.Google Scholar
17Cardinale, B., Wright, J., Cadotte, M., Carroll, I., Hector, A., Srivastava, D., Loreau, M., and Weis, J.J. 2007. Impacts of plant diversity on biomass production increase through time because of species complementarity. Proceedings of the National Academy of Sciences 104:18123–18128.CrossRefGoogle ScholarPubMed
18Hector, A., Joshi, J., Scherer-Lorenzen, M., Schmid, B., Spehn, E., Wacker, L., Weilenmann, M., Bazeley-White, E., Beierkuhnlein, C., Caldeira, M.C., Dimitrakopoulos, P.G., Finn, J.A., Huss-Danell, K., Jumpponen, A., Leadley, P.W., Loreau, M., Mulder, C.P.H., Neßhöver, C., Palmborg, C., Read, D.J., Siamantziouras, A.S.D., Terry, A.C., and Troumbis, A.Y. 2007. Biodiversity and ecosystem functioning: reconciling the results of experimental and observational studies. Functional Ecology 21:998–1002.Google Scholar
19Spehn, E.M., Scherer-Lorenzen, M., Schmid, B., Hector, A., Caldeira, M.C., Dimitrakopoulos, P.G., Finn, J.A., Jumpponen, A., O'Donnovan, G., Pereira, J.S., Schulze, E.-D., Troumbis, A.Y., and Korner, C. 2002. The role of legumes as a component of biodiversity in a cross-European study of grassland biomass nitrogen. Oikos 98:205–218.Google Scholar
20Barnhart, S. 1999. Selecting Forage Species. ISU Extension Publication Pm 1792. Iowa State University, Ames, IA.Google Scholar
21Piper, J. and Pimm, S. 2002. The creation of diverse prairie-like communities. Community Ecology 3:205–216.CrossRefGoogle Scholar
22Jolliffe, P.A. 2000. The replacement series. Journal of Ecology 88:371–385.Google Scholar
23Littell, R., Milliken, G., Stroup, W., and Wolfinger, R. 1996. SAS System for Mixed Models. SAS Institute Inc., Cary, NC.Google Scholar
24Federer, W.T. 1993. Statistical Design and Analysis for Intercropping Experiments. Springer-Verlag, New York, NY.Google Scholar
25SAS-Institute-Inc. 2003. SAS Software 9.1.3 for Windows. SAS Institute Inc., Cary, NC.Google Scholar
26Polley, H.W., Wilsey, B.J., and Derner, J.D. 2003. Do species evenness and plant density influence the magnitude of selection and complementarity effects in annual plant species mixtures? Ecology Letters 6:248–256.CrossRefGoogle Scholar
27Isbell, F.I., Polley, H.W., and Wilsey, B.J. 2009. Species interaction mechanisms maintain grassland plant species diversity. Ecology 90:1821–1830.Google Scholar
28Roscher, C., Schumacher, J., Weisser, W., Schmid, B., and Schulze, E-D. 2007. Detecting the role of individual species for overyielding in experimental grassland communities composed of potentially dominant species. Oecologia 154:535–549.Google Scholar
29Sanderson, M.A., Skinner, R.H., Barker, D.J., Edwards, G.R., Tracy, B.F., and Wedin, D.A. 2004. Plant species diversity and management of temperate forage and grazing land ecosystems. Crop Science 44:1132–1144.CrossRefGoogle Scholar
30Hector, A. and Bagchi, R. 2007. Biodiversity and ecosystem multifunctionality. Nature 448:188–190.Google Scholar