Malaise trap sampling efficiency for bees (Hymenoptera: Apoidea) in a restored tallgrass prairie
Keywords:
insect monitoring, spatial variation, species richness, trapping effortAbstract
Effective assessment of bee (Hymenoptera: Apoidea) diversity is essential for informed bee conservation policies. In this study, the effectiveness of Malaise traps in assessing bee species richness in a westcentral Illinois restored prairie was examined using the Chao1 nonparametric richness estimator. Individual traps varied greatly in abundance and species richness of bees collected, and substantially greater trapping effort would have been needed to achieve Chao1 estimates. Malaise traps provide a potentially effective means of augmenting bowl trap inventories, but more studies on Malaise trap performance and comparisons with bowl traps are needed, particularly in heterogeneous environments.
Sumario
La evaluación eficaz de la diversidad de abejas (Hymenoptera: Apoidea) es esencial para ser informado de las políticas de conservación de abejas. En este estudio, se examinó la eficacia de trampas Malaise en la evaluación de la riqueza de especies de abejas en una pradera restaurada de centro-oeste del estado de Illinois utilizando el estimador de riqueza Chao1 no paramétrico. Las trampas individuales variaron en gran medida en la abundancia y riqueza de especies de abejas recolectadas, y se habrían necesitado sustancialmente mayor esfuerzo de captura para lograr estimaciones Chao1. Las trampas Malaise proveen un medio potencialmente eficaz para aumentar el inventario en las trampas cuencos, pero se necesitan más estudios sobre el rendimiento de las trampas Malaise y las comparaciones con trampas cuencos, sobre todo en ambientes heterogéneos.
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