Weeds of tropical rainfed cropping systems: are there patterns at a global level of perception?

The objective of this study was to investigate the effect of general factors such as crop, regional climate or country on the weed flora and weed abundance in rainfed crops in tropical regions. For this purpose, we used 24 weed survey datasets from 4 climates, 11 crops and 11 countries in the tropics. These datasets are available in public access on the CIRAD Amatrop dataverse. This represents a set of 6 069 weed surveys, covering a total of 1 388 taxa. The data were analysed using different complementary approaches, including infestation diagrams, species correlation and co-occurrence matrices, corrected ecological profiles, and PCAIV. The results show that in the tropics there is a background of fairly common and ubiquitous species that are found in varying abundance in almost all situations. Ageratum conyzoides is the only Major general species, while Rottboellia cochinchinensis, Digitaria horizontalis, Bidens pilosa, Cyperus rotundus, Commelina benghalensis, Euphorbia heterophylla, Eleusine indica, Euphorbia hirta and Tridax procumbens are General species, present in more than 15% of the records. The climate factor, depending on rainfall and altitude, which influences temperature, selects certain indicator species for different situations. The crop factor does not have a particular selective effect and the country highlights local flora. Crops are themselves dependent on climate. It is nevertheless possible to know which species are most likely to be found in a plot of a crop, under a given climate and in a given country. However, it seems that it is the combination of the edaphic and climatic nature of the plot that most accurately determines the floristic composition of the weed flora, although we were unable to analyse this due to the lack of complete information on these factors for all the datasets used. Finally, out of the 1 388 taxa taken into account, only about 300 species constitute the core of the weeds of tropical rainfed crops, because of their frequency, their abundance or their character as indicators of particular agro-ecological conditions.

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Main Authors: Le Bourgeois, Thomas, Marnotte, Pascal, Fayolle, Benjamin
Format: monograph biblioteca
Language:eng
Published: CIRAD
Online Access:http://agritrop.cirad.fr/597919/
http://agritrop.cirad.fr/597919/1/Weeds%20of%20tropical%20rainfed%20cropping%20systems.pdf
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spelling dig-cirad-fr-5979192021-03-19T07:50:15Z http://agritrop.cirad.fr/597919/ http://agritrop.cirad.fr/597919/ Weeds of tropical rainfed cropping systems: are there patterns at a global level of perception? Le Bourgeois Thomas, Marnotte Pascal, Fayolle Benjamin. 2021. Montpellier : CIRAD, 80 p. Researchers Weeds of tropical rainfed cropping systems: are there patterns at a global level of perception? Le Bourgeois, Thomas Marnotte, Pascal Fayolle, Benjamin eng 2021 CIRAD The objective of this study was to investigate the effect of general factors such as crop, regional climate or country on the weed flora and weed abundance in rainfed crops in tropical regions. For this purpose, we used 24 weed survey datasets from 4 climates, 11 crops and 11 countries in the tropics. These datasets are available in public access on the CIRAD Amatrop dataverse. This represents a set of 6 069 weed surveys, covering a total of 1 388 taxa. The data were analysed using different complementary approaches, including infestation diagrams, species correlation and co-occurrence matrices, corrected ecological profiles, and PCAIV. The results show that in the tropics there is a background of fairly common and ubiquitous species that are found in varying abundance in almost all situations. Ageratum conyzoides is the only Major general species, while Rottboellia cochinchinensis, Digitaria horizontalis, Bidens pilosa, Cyperus rotundus, Commelina benghalensis, Euphorbia heterophylla, Eleusine indica, Euphorbia hirta and Tridax procumbens are General species, present in more than 15% of the records. The climate factor, depending on rainfall and altitude, which influences temperature, selects certain indicator species for different situations. The crop factor does not have a particular selective effect and the country highlights local flora. Crops are themselves dependent on climate. It is nevertheless possible to know which species are most likely to be found in a plot of a crop, under a given climate and in a given country. However, it seems that it is the combination of the edaphic and climatic nature of the plot that most accurately determines the floristic composition of the weed flora, although we were unable to analyse this due to the lack of complete information on these factors for all the datasets used. Finally, out of the 1 388 taxa taken into account, only about 300 species constitute the core of the weeds of tropical rainfed crops, because of their frequency, their abundance or their character as indicators of particular agro-ecological conditions. monograph info:eu-repo/semantics/report Report info:eu-repo/semantics/publishedVersion http://agritrop.cirad.fr/597919/1/Weeds%20of%20tropical%20rainfed%20cropping%20systems.pdf text Cirad license info:eu-repo/semantics/openAccess https://agritrop.cirad.fr/mention_legale.html
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country Francia
countrycode FR
component Bibliográfico
access En linea
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region Europa del Oeste
libraryname Biblioteca del CIRAD Francia
language eng
description The objective of this study was to investigate the effect of general factors such as crop, regional climate or country on the weed flora and weed abundance in rainfed crops in tropical regions. For this purpose, we used 24 weed survey datasets from 4 climates, 11 crops and 11 countries in the tropics. These datasets are available in public access on the CIRAD Amatrop dataverse. This represents a set of 6 069 weed surveys, covering a total of 1 388 taxa. The data were analysed using different complementary approaches, including infestation diagrams, species correlation and co-occurrence matrices, corrected ecological profiles, and PCAIV. The results show that in the tropics there is a background of fairly common and ubiquitous species that are found in varying abundance in almost all situations. Ageratum conyzoides is the only Major general species, while Rottboellia cochinchinensis, Digitaria horizontalis, Bidens pilosa, Cyperus rotundus, Commelina benghalensis, Euphorbia heterophylla, Eleusine indica, Euphorbia hirta and Tridax procumbens are General species, present in more than 15% of the records. The climate factor, depending on rainfall and altitude, which influences temperature, selects certain indicator species for different situations. The crop factor does not have a particular selective effect and the country highlights local flora. Crops are themselves dependent on climate. It is nevertheless possible to know which species are most likely to be found in a plot of a crop, under a given climate and in a given country. However, it seems that it is the combination of the edaphic and climatic nature of the plot that most accurately determines the floristic composition of the weed flora, although we were unable to analyse this due to the lack of complete information on these factors for all the datasets used. Finally, out of the 1 388 taxa taken into account, only about 300 species constitute the core of the weeds of tropical rainfed crops, because of their frequency, their abundance or their character as indicators of particular agro-ecological conditions.
format monograph
author Le Bourgeois, Thomas
Marnotte, Pascal
Fayolle, Benjamin
spellingShingle Le Bourgeois, Thomas
Marnotte, Pascal
Fayolle, Benjamin
Weeds of tropical rainfed cropping systems: are there patterns at a global level of perception?
author_facet Le Bourgeois, Thomas
Marnotte, Pascal
Fayolle, Benjamin
author_sort Le Bourgeois, Thomas
title Weeds of tropical rainfed cropping systems: are there patterns at a global level of perception?
title_short Weeds of tropical rainfed cropping systems: are there patterns at a global level of perception?
title_full Weeds of tropical rainfed cropping systems: are there patterns at a global level of perception?
title_fullStr Weeds of tropical rainfed cropping systems: are there patterns at a global level of perception?
title_full_unstemmed Weeds of tropical rainfed cropping systems: are there patterns at a global level of perception?
title_sort weeds of tropical rainfed cropping systems: are there patterns at a global level of perception?
publisher CIRAD
url http://agritrop.cirad.fr/597919/
http://agritrop.cirad.fr/597919/1/Weeds%20of%20tropical%20rainfed%20cropping%20systems.pdf
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AT fayollebenjamin weedsoftropicalrainfedcroppingsystemsaretherepatternsatagloballevelofperception
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