Response and effect traits of arable weeds in agro‐ecosystems: a review of current knowledge
Gaba, S | Perronne, R | Fried, G | Gardarin, A | Bretagnolle, F | Biju‐Duval, L | Colbach, N | Cordeau, S | Fernández‐Aparicio, M | Gauvrit, C | Gibot‐Leclerc, S | Guillemin, J‐P | Moreau, D. | Munier‐Jolain, N | Strbik, F | Reboud, X
Integrating principles of ecological intensification into weed management strategies requires an understanding of the many relationships among weeds, crops and other organisms of agro‐ecosystems in a changing context. Extensively used during the last two decades in weed science, trait‐based approaches have provided general insights into weed community response to agricultural practices, and recently to understanding the effect of weeds on agro‐ecosystem functioning. In this review, we provide a holistic synthesis of the current knowledge on weed response and effect functional traits. Based on the literature and recent advances in weed science, we review current knowledge on (i) weed functional groups and ecological strategies, (ii) weed functional response traits to cropping systems and (iii) weed functional effect traits affecting agro‐ecosystem functioning. For each functional trait, we explicitly present the assumptions and evidence on the linkage between trait values and ecological functions, in response to either management practices, for example tillage, sowing and herbicides, or biotic interactions, for example crop–weed competition and pollination. Finally, we address and discuss major research avenues that may significantly improve the use of traits and the knowledge of functional diversity in weed science for the future, especially to design and implement more environmentally sustainable weed management strategies.
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