center for synthesis
and analysis of biodiversity

A centre created and developed by the FRB
DISCO-WEEDSmallPix
Disentangling the role of anthropic DISturbances and eCological processes on weed community assembly


Coordinator:
 Sabrina Gaba - INRA (Dijon, France)

Postdoctorate: Bérenger Bourgeois

11 participants: Laura Armengot ; Florent Bonneu - Université d'Avignon (France) ; Vincent Bretagnolle - CNRS (France) ; Jacques Caneill - INRA (Dijon, France) ; Joël Chadoeuf - INRA (Avignon, France) ; Guillaume Fried - ANSES (France) ; Santiago Poggio - Facultad de Agronomía (Buenos Aires, Argentine) ; Lucie Mahault ; François Munoz - CIRAD (France) ; Marie-Laure Navas - SupAgro, INRA (Montpellier, France) ; Jonathan Storkey - Rothamsted Research (UK) 
 

Discover the project on YouTube 


 


 


Summary:
Designing cropping systems that maintain or increase yields while reducing the reliance on agro-chemical inputs is the main challenge that agriculture is facing today. Herbicides represent the majority of pesticides used in annual crops in many countries, making weed management one of the main obstacles to meeting this challenge. It is imperative, therefore, that the consequences of agricultural management on weed diversity/abundance and crop production are investigated in contrasting situations. However, despite an extensive literature, weed species assembly in agroecosystems remains to be fully understood.

Weed community assembly results from interactions between various ecological processes across a range of spatial and temporal scales and management through disturbances regimes and resources (e.g. nitrogen and water) levels at the field scale. DISCO-WEED aims to provide a conceptual framework based on ecology and agronomy to quantify both the relative contribution of agricultural and ecological processes in weed species assembly and their impact on weed-crop interactions. Our consortium partners combine expertise in agronomy, ecology, and spatial statistics. DISCO-WEED will use a large number of databases, spanning several countries and weed species pools, gathering data on weed flora, agricultural practices and for some crop yield, collected at all spatial scales from 1m² to the national scale over nearly 4,000 agricultural fields these last 15 years.

Keywords:
Weed, agroecosystem, community, metacommunity, plant functional traits, competition, spatial dispersion, seed persistence, disturbances, assembly rules