How Management Factors Influence Weed Communities of Cereals, Their Diversity and Endangered Weed Species in Central Europe

Matthias Schumacher, Simon Ohnmacht, Ronja Rosenstein and Roland Gerhards
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Matthias Schumacher: Department of Weed Science, Institute of Phytomedicine, University of Hohenheim, 70599 Stuttgart, Germany
Simon Ohnmacht: Department of Weed Science, Institute of Phytomedicine, University of Hohenheim, 70599 Stuttgart, Germany
Ronja Rosenstein: Department of Weed Science, Institute of Phytomedicine, University of Hohenheim, 70599 Stuttgart, Germany
Roland Gerhards: Department of Weed Science, Institute of Phytomedicine, University of Hohenheim, 70599 Stuttgart, Germany

Agriculture, 2018, vol. 8, issue 11, 1-13

Abstract: The loss of weed biodiversity in agricultural fields is a global issue that needs to be counteracted to preserve their supported ecosystem services and food webs. Many short-term efforts are undertaken to conserve weed species, especially already endangered ones, but several years after expiration, eventually result in species-poor communities. Understanding drivers of community composition is key to prevent biodiversity loss. To understand the factors that shape weed communities and influence weed diversity and endangered weed species, we monitored conventional and organic cereal fields in two regions of southwestern Germany. A redundancy analysis was performed on vegetation recordings and data from a farmer survey. Crop species, herbicide use, farming system, nitrogen, and light availability had the strongest impact on weed diversity. The weed communities were dominated by Alopecurus myosuroides , Galium aparine , Viola arvensis , Polygonum convolvulus , and Veronica persica , and were mainly shaped by crop species, tillage, location in the field, and timing of herbicide application. Bromus grossus and Bromus secalinus , two endangered weed species, survived in conventional field margins as a result of the use of herbicides with gaps for Bromus species. Conservation efforts are not restricted to organic farming and should consider the major drivers of weed communities. Precision farming techniques are available to create networks of habitats for endangered and common weed species and subsequently increase agro-biodiversity per se.

Keywords: Bromus grossus; Bromus secalinus; rare arable weed species; redundancy analysis (RDA); species conservation; weed community; weed diversity (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2018
References: View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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