The Effect of Microhabitat and Trophic Conditions on the Colonization Density of Cambio- and Xylophagous Insects in Fir Stumps (Abies alba Mill.) in Selected Stands of the Swietokrzyskie Mountains (Poland)

1996

S. 186-189

12 Lit. Ang.

Unselbständiges Werk

200044468

In the Swietokrzyskie Mountains there were carried out studies to estimate the colonization density of cambio- and xylophages in fir stumps and to determine the effect of selected microhabitat and trophic factors on insect numbers. Most of the investigated fir stumps (79%), aged 2-4 years after tree cutting, were occupied by cambio- and xylophagous insects (on average 32 individuals per 1 stump). There were identified 2 cambiophages: Rhagium inquisitor L. and Rhagium mordax Deg., 1 cambio-xylophagous species Pissodes piceae Ill. and 5 xylophages: Hylecoetus dermestoides L., Trypodendron lineatum Ol., Serropalpus barbatus Schall., Urocerus gigas L. and Xeris spectrum L. Colonization density of these insects in fir stumps was influenced by microhabitat and trophic conditions. The highest density was found in fir stumps without mosses and lichens cover, moderately decomposed and wet, situated in partly insolated places. To limitate numbers of secondary and technical invaders of wood, developing in fir stumps, it would be advisable to leave as lowest and possible and strictly debarked stumps, especially in partly insolated and humid places.