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- W1994572176 abstract "Because tropical forests face serious threats and are usually situated in developing countries, cheap and easy Rapid Biodiversity Assessment (RBA) seems an ideal strategy for documenting changes in habitat quality and setting conservation priorities. Fruit-feeding butterflies are often used as focal taxa to document biodiversity trends in tropical forests. However, the choice of inappropriate sampling strategies may nullify its value. More extensive data sets that sample multiple months and seasons and incorporate the vertical dimension are needed as a baseline for designing reliable sampling regimes. Therefore, we performed a butterfly trapping study in Ghana, using both understorey and canopy traps, and sampling seven periods covering dry and wet seasons. Both individual numbers and species richness were on average three to four times higher in the understorey than in the canopy traps with strikingly different species composition (only 11% overlap in species). The number of species and individual abundance recorded in a month varied extensively. This study underlined the importance of taking into account temporal variation and vertical stratification when designing RBAs of fruit-feeding butterflies in West African forests. We recommend the use of both understorey and canopy traps and inclusion of both ‘wet’ and ‘dry’ seasons into RBA sampling regimes. Comme les forêts tropicales font face à des menaces graves et qu'elles sont en général situées dans des pays en développement, une évaluation rapide de la biodiversité (RBA) semble une stratégie idéale pour documenter les changements de qualité de l'habitat et établir des priorités de conservation. On se sert souvent des papillons frugivores comme taxons focaux pour documenter les tendances de la biodiversité dans des forêts tropicales. Cependant, le choix de stratégies d’échantillonnage inappropriées risque d'annuler leur valeur. Il faut des ensembles de données plus complets, qui échantillonnent sur des mois et des saisons et qui intègrent une dimension verticale pour établir la base de référence permettant de concevoir des régimes d’échantillonnage fiables. C'est pourquoi nous avons fait une étude de piégeage des papillons au Ghana, en utilisant des pièges en sous-bois et dans la canopée, et en couvrant sept périodes comptant des saisons sèches et des saisons des pluies. Aussi bien les chiffres individuels que la richesse en espèces étaient en moyenne 3 à 4 fois supérieurs dans les pièges placés en sous-bois que dans la canopée, avec une composition des espèces remarquablement différente (seulement 11% de recouvrement des espèces). Le nombre d'espèces et l'abondance individuelle enregistrés en un mois variaient énormément. Cette étude souligne qu'il est important de prendre en compte la variation temporelle et la stratification verticale lorsque l'on prépare une RBA de papillons frugivores dans des forêts d'Afrique de l'Ouest. Nous recommandons l'emploi de pièges en sous-bois et dans la canopée et l'inclusion de saisons « sèches » et « humides » dans les régimes d’échantillonnages d'une RBA. As a service to our authors and readers, this journal provides supporting information supplied by the authors. Such materials are peer-reviewed and may be re-organized for online delivery, but are not copy-edited or typeset. Technical support issues arising from supporting information (other than missing files) should be addressed to the authors. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article." @default.
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- W1994572176 date "2012-05-01" @default.
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- W1994572176 title "Spatial and temporal variation in butterfly biodiversity in a West African forest: lessons for establishing efficient rapid monitoring programmes" @default.
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- W1994572176 doi "https://doi.org/10.1111/j.1365-2028.2012.01328.x" @default.
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