Reconciling crop productivity and biodiversity maintenance is one of the main challenges of agriculture worldwide. Moreover, the importance of weed diversity in mitigating yield losses has been identified as one of the top five research priorities in weed science. We tested the hypotheses that (1) not all weed communities generate yield losses and (2) that more diversified weed communities can mitigate yield losses. The study is based on three years of observations of weed densities, weed biomass and crop biomass at four critical growth stages of winter cereals across 54 zones (36 unweeded and 18 weeded). Out of the six communities identified, only four generated significant yield losses in unweeded zones, ranging from 19% to 56%. The number of ears per plant and the number of grains per ear were systematically affected. Only one weed community was capable of reducing 1,000-kernel weight. Weed biomass decreased by 83% over the gradient of weed community evenness, whereas crop productivity increased by 23%. Diversified weed communities limited the negative effect of competitive and dominant species on crop productivity while potentially promoting ecosystem services provided by subordinate species.
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The data that support the findings of this study are available from the corresponding author upon request.
The code used to analyse the data and produce the figures is available from the corresponding author upon request.
Milberg, P. & Hallgren, E. Yield loss due to weeds in cereals and its large-scale variability in Sweden. Field Crops Res. 86, 199–209 (2004).
Oerke, E. C. Crop losses to pests. J. Agric. Sci. 144, 31–43 (2006).
Foley, J. A. et al. Solutions for a cultivated planet. Nature 478, 337–342 (2011).
Heap, I. in Integrated Pest Management: Pesticide Problems Vol. 3 (eds Pimentel, D. & Peshin, R.) 281–301 (Springer, 2014).
Storkey, J. & Neve, P. What good is weed diversity? Weed Res. 58, 239–243 (2018).
Malik, N. & Vanden Born, W. H. The biology of canadian weeds. 86. Galium aparine L. and Galium spurium L. Can. J. Plant Sci. 68, 481–499 (1988).
Naylor, R. E. L. Aspects of the population dynamics of the weed Alopecurus myosuroides Huds. in winter cereal crops. J. Appl. Ecol. 9, 127–139 (1972).
Jordan, N. & Vatovec, C. in Weed Biology and Management (ed. Inderjit, S.) 137–158 (Springer, 2004).
Marshall, E. J. P. et al. The role of weeds in supporting biological diversity within crop fields. Weed Res. 43, 77–89 (2003).
Neve, P. et al. Reviewing research priorities in weed ecology, evolution and management: a horizon scan. Weed Res. 58, 250–258 (2018).
Guglielmini, A., Verdú, A. & Satorre, E. Competitive ability of five common weed species in competition with soybean. Int. J. Pest Manag. 63, 30–36 (2017).
Pollnac, F. W., Maxwell, B. D. & Menalled, F. D. Weed community characteristics and crop performance: a neighbourhood approach. Weed Res. 49, 242–250 (2009).
Davis, A. S., Renner, K. A. & Gross, K. L. Weed seedbank and community shifts in a long-term cropping systems experiment. Weed Sci. 53, 296–306 (2005).
Clements, D. R., Weise, S. F. & Swanton, C. J. Integrated weed management and weed species diversity. Phytoprotection 75, 1–18 (1994).
Aschehoug, E. T. & Callaway, R. M. Diversity increases indirect interactions, attenuates the intensity of competition, and promotes coexistence. Am. Nat. 186, 452–459 (2015).
Weigelt, A. et al. Identifying mechanisms of competition in multi-species communities. J. Ecol. 95, 53–64 (2007).
Ali, A., Streibig, J. C. & Andreasen, C. Yield loss prediction models based on early estimation of weed pressure. Crop Prot. 53, 125–131 (2013).
Freckleton, R. & Watkinson, A. R. Asymmetric competition between plant species. Funct. Ecol. 15, 615–623 (2001).
Swinton, S. M., Buhler, D. D., Forcella, F., Gunsolus, J. L. & King, R. P. Estimation of crop yield loss due to interference by multiple weed species. Weed Sci. 42, 103–109 (1994).
Poggio, S. L. & Ghersa, C. M. Species richness and evenness as a function of biomass in arable plant communities. Weed Res. 51, 241–249 (2011).
Navas, M.-L. Trait-based approaches to unravelling the assembly of weed communities and their impact on agro-ecosystem functioning. Weed Res. 52, 479–488 (2012).
Bennett, J. A., Riibak, K., Tamme, R., Lewis, R. J. & Pärtel, M. The reciprocal relationship between competition and intraspecific trait variation. J. Ecol. 104, 1410–1420 (2016).
Gibson, D. J., Young, B. G. & Wood, A. J. Can weeds enhance profitability? Integrating ecological concepts to address crop-weed competition and yield quality. J. Ecol. 105, 900–904 (2017).
Cierjacks, A., Pommeranz, M., Schulz, K. & Almeida-Cortez, J. Is crop yield related to weed species diversity and biomass in coconut and banana fields of northeastern Brazil? Agric. Ecosyst. Environ. 220, 175–183 (2016).
Ferrero, R., Lima, M., Davis, A. S. & Gonzalez-Andujar, J. L. Weed diversity affects soybean and maize yield in a long term experiment in Michigan, USA. Front. Plant Sci. 8, 236 (2017).
Syswerda, S. P. & Robertson, G. P. Ecosystem services along a management gradient in Michigan (USA) cropping systems. Agric. Ecosyst. Environ. 189, 28–35 (2014).
Mariotte, P. Do subordinate species punch above their weight? Evidence from above- and below-ground. New Phytol. 203, 16–21 (2014).
Wilson, B. & Wright, K. Predicting the growth and competitive effects of annual weeds in wheat. Weed Res. 30, 201–211 (1990).
MacArthur, R. & Levins, R. The limiting similarity, convergence, and divergence of coexisting species. Am. Nat. 101, 377–385 (1967).
Smith, R. G., Mortensen, D. A. & Ryan, M. R. A new hypothesis for the functional role of diversity in mediating resource pools and weed–crop competition in agroecosystems. Weed Res. 50, 37–48 (2010).
Funk, J. L. & Wolf, A. A. Testing the trait-based community framework: do functional traits predict competitive outcomes? Ecology 97, 2206–2211 (2016).
Satorre, E. H. & Slafer, G. A. Wheat: Ecology and Physiology of Yield Determination (CRC Press, 1999).
Angonin, C., Caussanel, J. P. & Meynard, J. M. Competition between winter wheat and Veronica hederifolia: influence of weed density and the amount and timing of nitrogen application. Weed Res. 36, 175–187 (1996).
Aschehoug, E. T., Brooker, R., Atwater, D. Z., Maron, J. L. & Callaway, R. M. The mechanisms and consequences of interspecific competition among plants. Annu. Rev. Ecol. Evol. Syst. 47, 263–281 (2016).
Gherekhloo, J. et al. Multispecies weed competition and their economic threshold on the wheat crop. Planta Daninha 28, 239–246 (2010).
Zimdahl, R. L. Weed-Crop Competition: A Review (John Wiley & Sons, 2007).
Welsh, J., Bulson, H., Stopes, C., Froud-Williams, R. & Murdoch, A. The critical weed-free period in organically-grown winter wheat. Ann. Appl. Biol. 134, 315–320 (1999).
Bauer, G. et al. Always on the bright side: the climbing mechanism of Galium aparine. Proc. R. Soc. B 278, 2233–2239 (2010).
Magurran, A. E. & McGill, B. J. (eds) Biological Diversity: Frontiers in Measurement and Assessment (Oxford Univ. Press, 2011).
Taylor, K. Galium aparine L. J. Ecol. 87, 713–730 (1999).
Storkey, J. & Westbury, D. B. Managing arable weeds for biodiversity. Pest Manag. Sci. 63, 517–523 (2007).
Palmer, M. W. & Maurer, T. A. Does diversity beget diversity? A case study of crops and weeds. J. Veg. Sci. 8, 235–240 (1997).
Booth, B. D. & Swanton, C. J. Assembly theory applied to weed communities. Weed Sci. 50, 2–13 (2002).
Armengot, L., José-María, L., Chamorro, L. & Sans, F. X. Avena sterilis and Lolium rigidum infestations hamper the recovery of diverse arable weed communities. Weed Res. 57, 278–286 (2017).
Adeux, G. et al. Diversified grain-based cropping systems provide long term weed control while limiting herbicide use and yield losses. Agron. Sustain. Dev. 39, 42 (2019).
Botta-Dukát, Z. Rao’s quadratic entropy as a measure of functional diversity based on multiple traits. J. Veg. Sci. 16, 533–540 (2005).
Westoby, M. A leaf-height-seed (LHS) plant ecology strategy scheme. Plant Soil 199, 213–227 (1998).
Kleyer, M. et al. The LEDA Traitbase: a database of life-history traits of the Northwest European flora. J. Ecol. 96, 1266–1274 (2008).
R Core Team R: A Language and Environment for Statistical Computing (R Foundation for Statistical Computing, 2016).
We thank (1) P. Chamoy, B. Pouilly and P. Farcy of the INRA experimental station in Bretenière, France, who carried out this field experiment, (2) all who participated in field work (D. Meunier, G. Louviot, M. Abgrall, J. Degenmann and the team Grenier with A. Baudron, L. Grall, M. Schwartz and M. Angaud) and (3) N. Colbach and D. Moreau for their scientific input. G.A. was funded by the International PhD Programme in Agrobiodiversity of the Scuola Superiore Sant’Anna, Pisa, Italy, and hosted by the Institut National de la Recherche Agronomique in Dijon. We acknowledge financial support from the French project CoSAC (ANR-15-CE18-0007), the European Union’s Horizon 2020 research and innovation programme under grant agreement no. 727321 (IWM PRAISE), the French ‘Investissement d’Avenir’ programme and the project ISITE-BFC ‘Agroecology in BFC’ (contract ANR-15-IDEX-03).
The authors declare no competing interests.
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Adeux, G., Vieren, E., Carlesi, S. et al. Mitigating crop yield losses through weed diversity. Nat Sustain 2, 1018–1026 (2019). https://doi.org/10.1038/s41893-019-0415-y
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