Spatial patterns of weeds along a gradient of landscape complexity |
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| Authors: | Audrey Alignier Vincent Bretagnolle Sandrine Petit |
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| Affiliation: | 1. Institut National de la Recherche Agronomique (INRA), UMR 1347 Agroécologie, 17, rue Sully, BP 86510, F-21065 Dijon Cedex, France;2. Centre d’Etudes Biologiques de Chizé (CEBC), CNRS, UPR 1934, F-79360 Beauvoir sur Niort, France;1. Department of Agricultural Technology, Technological Educational Institute of Thessaly, 411 10 Larissa, Greece;2. Department of Agricultural Development, Democritus University of Thrace, 682 00 Orestiada, Greece;1. INRA, UMR1347 Agroécologie, BP 86510, F-21000 Dijon, France;2. AgroSup Dijon, UMR1347 Agroécologie, BP 86510, F-21000 Dijon, France;1. Agri-Science Queensland, Department of Agriculture and Fisheries, Toowoomba, Queensland 4350, Australia;2. Queensland Alliance for Agriculture and Food Innovation (QAAFI), The University of Queensland, Toowoomba, Queensland 4350, Australia;1. Institute of Sustainable Agriculture (CSIC), Avda. Menendez Pidal s/n, 14004, Córdoba, Spain;2. Department of Applied Physics, University of Cordoba, Campus Rabanales, Cordoba, Spain;3. Global Change and Photosynthesis Research Unit, Agricultural Research Service (USDA), Urbana, IL, USA;4. Instituto Madrileño de Investigación y Desarrollo Rural, Agrario y Alimentario (IMIDRA), Finca El Encín, Alcalá de Henares, Madrid, Spain;1. School of Agriculture and Food Sciences, The University of Queensland, Gatton, Queensland 4343, Australia;2. The Centre for Plant Science, Queensland Alliance for Agriculture and Food Innovation, The University of Queensland, Gatton/Toowoomba, Queensland 4343/4350, Australia;3. The University of Sydney, Narrabri, NSW 2390, Australia;1. Laboratory of Agronomy, Faculty of Crop Science, Agricultural University of Athens, GR 11855, Greece;2. Polytechnic Institute of Beja, School of Agriculture, Beja, Portugal;3. Center for Renewable Energy Sources and Saving-CRES, Athens, Greece |
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| Abstract: | ![]()
Processes that drive spatial patterning among plant species are of ongoing interest, mostly because these patterns have implications for the structure and function of plant communities. We investigated the spatial strategies of weeds focusing on how spatial patterns of weeds are mediated by agricultural landscape complexity and species life-history attributes. We quantified the spatial distribution of 110 weed species using data collected in ten landscapes in central western France along a gradient of landscape complexity, from structurally complex (numerous small fields) to structurally simple (few large fields). We then related differences observed in species’ distribution patterns to ecological attributes of species for resource exploitation and dispersion. Our study reveals that weeds were spatially aggregated at the landscape scale. Their spatial patterns are related to the frequency of occurrence of weeds but surprisingly not directly to the seed dispersal type, nor to the degree of habitat specialization. We show that landscape complexity had no direct effect on the spatial patterning of weeds but through interactions with species attributes. Our results point to the importance of interactions between landscape complexity and species attributes in the spatial patterning of weed species even in intensively managed fields. These patterns appear to be a consequence of the spatial arrangement of landscape elements as well as the result of landscape filtering on species attributes. |
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