Panama Canal Amplification: Making the best of a clearcut situation

In Neotropical moist forests the transformation of wood biomass into animal biomass is initially mediated by wood-boring beetles. When trees are first cut, beetles are among the earliest visitors. Adults typically meet and mate on a selected host plant; the females then lay eggs that hatch into larvae. The larvae create feeding galleries in the wood, and deposit microbe-laden frass. Because the beetles create openings in the bark and jump-start the decomposition of wood, they facilitate colonization by other insects (including predators and parasites) and fungi. The host plant associations of wood-boring beetles, which reveal information about both insect microhabitat and diet, are poorly known. Data are especially difficult to acquire for wood-boring insects associated with tropical trees. The amplification of the Panama Canal will lead to partial inundation of several forested islands within, and banks along, the manmade Lago Gatún. Prior to inundation the forests are being clear-cut, and this provides an unparalleled opportunity to investigate the wood-boring beetles associated with a diverse group of trees, along with their predators and parasites.

En los bosques húmedos Neotropicales la transformación de la biomasa de madera en biomasa animal es mediada principalmente por escarabajos xilófagos. En areas de árboles que han sido taladas recientemente, los escarabajos adultos son los primeros en llegar. Despues de seleccionar una planta para hospedarse, los escarabajos se aparean y las hembras depositan huevos que generan larvas. Debido a que estos escarabajos crear aperturas a través de la corteza e inician el desglose de la madera, ellos facilitan la colonización por otros insectos (incluendo depredadores y parásitos) y hongos que descomponen la madera. Las plantas hospederas, que revelan información sobre los micro-hábitats de los insectos y su alimentación, han sido muy poco estudiadas. Los datos son especialmente difíciles de obtener para los insectos barrenadores de madera asociados a los árboles tropicales. La tala de árboles previa a la ampliación del Canal de Panamá ofrece una oportunidad sin igual para estudiar una diversa poblacion de árboles incluyendo las faunas de escarabajos xilófagos, y de otros organismos asociados.

29 June 2010

Introducing Sara Pinzón-Navarro:

Sara takes over the rearing cages!

Sara recently received her Ph.D. through the Natural History Museum and the Imperial College (UK). She has already published the results of pioneering studies on Neotropical weevils: she used DNA sequences to identify the immature stages of seed-feeding weevils, and she used chloroplast primers to amplify plant DNA from trap-collected weevils to provide information about their host plant associations. 
Here is Sara in Spain, showing off the exit hole made by Curculio sp. in an acorn! Now that she is in charge of the rearing, I expect to see a lot more weevils....
But I also like her snapshot of Neoclytus cf columbianus, waiting to get out of the cage...

1 comment:

  1. On behalf of bug bloggers everywhere, I would like to extend a warm welcome to Sara and am sure the weevils and Neoclytus of columbianus will be well cared for.