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This study deals with leaf beetles inhabiting tree canopies and the herb layer in mature pine forests. The research was conducted in four large forest areas in northern and eastern Poland in 1986-1987. A total of 51 Chrysomelidae species were found in all the forest stands. 24 species were found in pine canopies, and 40 in the herb layer. Two species - Cryptacephalus pint and Calomlcrus pinlcola - were associated with pine. A large number of species were registered in both vegetation layers, Aphthona euphorbiae and Galerucella. llneola being the most abundant of them. Species composition and abundance of chrysomelid communities were different in each area. The differences were partly due to floristic composition and geographical location of the stands.
Volcanism has both positive and negative effects. The limitation of the latter ones is admittedly difficult, however, depending on the strength and frequency of events and opportunities for the communities living in these areas is real, and the steps undertaken by them are varied. Despite the risks of inhabiting the regions of active volcanism these areas are densely populated. In the endangered areas the authorities, supported by scientists, are responsible for the effective management of risk and preparation of evacuation plans, which reduces material losses, and saves the life of the inhabitants. Thus, the question is whether and how the island society living in areas directly threatened by volcanic activity can counteract its negative effects? The article makes reference to the eruptions of located on the islands volcanoes Mont Pelée (Martinique), Soufrière Hills (Montserrat), Pinatubo (Luzon) and Helgafell (Heimaey), Ruapehu (New Zealand) and Santa Barbara (Terceira).
A two-year study of two sites of oak-hornbeam forest on Mt. Biała Góra in the Cracow- Wieluń Uplands in southern Poland yielded a total of 43 leaf beetle species, with 42 species registered from the herb layer and 15, from the shrub layer. Each community has been described in terms of species composition, abundance, the structure of dominance and zoogeography. The results have been compared relevant data from bibliography concerning other regions of Poland.
In the material collected from 1986 to 1988 In Roztocze (SE Poland) 212 species of Chrysomelidae were recorded (these constitute 45% of the Polish chrysomelid fauna). 22 of these were for the first time recorded from this region. The characteristics of the chrysomelid communities of 11 plant associations studied (8 forests and 3 open habitats) and a zoogeographlcal analysis are presented.
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