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Effect of Different Management Practices on Ground Beetle (Coleoptera : Carabidae) Assemblages of Uphill Grasslands

Twardowski J. P., Pastuszko K., Hurej M., Gruss I.

Polish Journal of Ecology

2017

Vol. 65, nr 3

400--409

Grasslands, especially those under ecological management (i.e. mowing, and grazing without fertilizers and chemicals), have significant importance for many arthropods, including ground beetles. We studied the abundance and species diversity of Carabidae of four uphill grasslands (West Sudety Mountains, Poland) under different management intensity: cattle grazing (one or four times per year), mowing, and alternatively managed (grazing/mowing). Beetles were collected using pitfall traps during three whole grazing seasons, i.e. from April to October in 2007-2009. The most frequent species of beetles, on each of the plots, were predators Poecilus cupreus, Calathus fuscipes and Nebria brevicollis. Sixtyfour ground beetle species were found altogether. Species richness ranged from 42 to 47, with the mean number of individuals per trap day-1 from 0.006 to 0.018. In the years of the study the number of ground beetles and their species diversity were higher on meadows mown once per year and alternatively managed grasslands as compared with grazed sites. Therefore, the simplified, organic way of agricultural production with reduced mowing or moving combined with grazing can be considered as appropriate in preserving the biodiversity of the grasslands in mountainous regions.

Siedliska brzeżne w agrocenozie pszenicy ozimej jako rezerwuary pożytecznych biegaczowatych (Col., Carabidae)

Twardowski J. P., Pastuszko K.

Journal of Research and Applications in Agricultural Engineering

2008

Vol. 53, nr 4

123-127

Celem badań było określenie różnic w liczebności i składzie gatunkowym biegaczowatych, na plantacji pszenicy ozimej oraz siedlisku przyległym, nieużytkowanym rolniczo. Do realizacji celu badań, wykorzystano pułapki glebowe Barbera. W badaniach wykazano, że chrząszcze Carabidae istotnie liczniej występowały na polu uprawnym. W siedlisku brzeżnym odnotowano zdecydowanie wyższe bogactwo gatunkowe tych pożytecznych owadów. Duża liczba gatunków oznaczonych w obu siedliskach, wskazuje, że drapieżce te, mogą migrować z siedliska brzeżnego na plantację pszenicy. Mogą tam, zatem, skuteczniej przyczynić się do ograniczenia występowania szkodników.

The aim of the study was to determine the differences between ground beetle abundance and their species structure on winter wheat field and adjacent uncultivated habitat. To realize this, Barber's pitfall traps were used. It was shown that adults of Carabidae were significantly abundant on arable field. But, in case of field margin much higher level of species diversity of this beneficial group was recorded. Higher number of species recognized in both biotopes indicates possibility of ground beetles for migration from boundary to wheat field. Thus, they can act as effective agents of biocontrol.