Weed communities of rain-fed lowland rice vary with infestation by Rhamphicarpa fistulosa |
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| Institution: | 1. Agroécologie, AgroSup Dijon, INRA, Univ. Bourgogne Franche-Comté, F-21000, Dijon, France;2. ITRA/CRAL, BP 1163, Lomé, Togo;3. Ecologie Systématique Evolution, CNRS, Univ. Paris-Sud, AgroParisTech, Université Paris-Saclay, 91400, Orsay, France;1. Faculty of Biology, University of Salamanca, C. U. Miguel de Unamuno, E-37007 Salamanca, Spain;2. Department of Geography, University of Bergen, PB 7802, N-5020 Bergen, Norway;1. Centro de Estudos Florestais, Instituto Superior de Agronomia, Universidade Técnica de Lisboa, Tapada da Ajuda, 1349-017 Lisbon, Portugal;2. Ecosystem Physiology, University Freiburg, Georges-Köhler-Allee 54, 79110 Freiburg, Germany;3. Thünen Institute of Climate-Smart Agriculture, Bundesallee 50, 38116 Braunschweig, Germany;1. Geological-Paleontological Department, Natural History Museum Vienna, Burgring 7, AT-1010 Wien, Austria;2. University Museum of Bergen, PO Box 7800, NO-5020 Bergen, Norway;3. Natural History Museum of Crete, University of Crete, Knossos Avenue, GR-71409 Heraklion, Crete, Greece;1. Departamento de Ciências Naturais, Herbário FURB, Universidade Regional de Blumenau – FURB, Rua Antônio da Veiga, 140, Bairro Victor Konder, 89012-900, Blumenau, SC, Brazil;2. Embrapa Florestas, Estrada da Ribeira, km 111, 83411-000, Colombo, PR, Brazil;3. Programa de Pós-graduação em Ecologia e Evolução, Laboratório de Ecologia Teórica e Síntese, Instituto de Ciências Biológicas, Universidade Federal de Goiás, Campus Samambaia, Caixa Postal 131, 74690-900, Goiânia, GO, Brazil;4. Departamento de Engenharia Florestal, Universidade Regional de Blumenau – FURB, Rua São Paulo, 3250, 89030-000, Blumenau, SC, Brazil;1. Department of Plant Ecology and Environmental Conservation, Biological and Chemical Research Centre, Faculty of Biology, University of Warsaw, ul. ?wirki i Wigury 101, 02-089 Warsaw, Poland;2. Department of Botany, Kherson State University, ul. Universytetska 27, 73000 Kherson, Ukraine |
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| Abstract: | The facultative hemiparasitic plant Rhamphicarpa fistulosa (Orobanchaceae) thrives in seasonally wet soils in sub-Saharan Africa, mainly in marginal lowland rice growing environments where weeds are already a major constraint for rice production. Because lowland rice production is increasing in tropical Africa, it is important to ascertain the influence of R. fistulosa on weed plant communities in these rice-growing habitats. We investigated weed plant community richness and composition at four different levels of R. fistulosa infestation across two years of surveys from lowland rice fields in northern Togo (West Africa). Despite a lack of significant differences in community richness among sites with different R. fistulosa infestation levels, there were significant differences in community composition, both when estimated from presence-absence data and from relative abundance data, after controlling statistically for geographic proximity among sites. Rhamphicarpa fistulosa infestation, therefore, may influence the competitive balance between rice and its weeds and shape weed community structure. However, experimental studies are required to elucidate the weed host range of R. fistulosa and the direct and indirect effects of this hemiparasite in rice fields in order to predict its net impact on rice and its weed species. |
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| Keywords: | Agroecology Hemiparasite Parasitic plant Species diversity Sub-Saharan Africa Weed plant community structure |
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