Tullgren funnel

Tullgren funnel

a piece of apparatus for extracting animals from soil or litter. The soil litter is supported on a gauze, heated from above by a light bulb, and organisms are collected in a container when they fall through the funnel as they move down the heat/desiccation gradient.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
References in periodicals archive ?
A modification is called the Tullgren funnel, which includes a light bulb above the funnel to accelerate the drying of the material and to force the specimens towards the vial at the bottom.
Two known predators of springtails, spiders and pseudoscorpions, were collected in litter samples and extracted using modified Tullgren funnel techniques.
Mites were extracted from the soil with Tullgren funnels. Mite specimens were collected by means of a stereomicroscope (SZX10, Olympus(R), Japan).
These samples were placed in Tullgren funnels and exposed to a light and heat source for 7 days as outlined by Sutherland (1996) and New (1998).