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The impact of extensive sheep grazing on the population and individual traits of Trollius altissimus Crantz

100%

Kostrakiewicz-Gieralt K., Kozak M., Kozlowska-Kozak K.

Polish Journal of Ecology

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2015

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tom 63

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nr 4

The montane glades in the Polish Carpathians were created centuries ago and have lasted mainly as a result of mowing and grazing. The observed abandonment of traditional methods of tillage in the last century led to adverse changes in vegetation cover, including a decrease in floristic diversity and the disappearance of many plant species and associations. One of a rare mountain taxa in Poland is the alpine globeflower Trollius altissimus Crantz. The investigations were carried out between June and September 2014 in the Hala Długa glade (Gorce Mts.) at two 36 m² plots: extensively grazed (P1) and unmanaged (P2). Light intensity, abundance and density of individuals and ramet clusters were significantly greater in the extensively grazed plot, whereas height of plant canopy, length of basal leaf petioles, width of leaf lamina, number and length of generative stems, number of flowers and follicles achieved higher values in the unmanaged plot. The structure of developmental stages and number of basal leaves did not differ remarkably between the studied sites. Also, the soil properties in both plots were very similar. The studies show that extensive sheep grazing has a positive influence on Trollius altissimus. In the studied locality such management contributes to the gradual spreading of this species. However, too intensive pasturage might eliminate this species as it has never been observed in any of the permanently grazed patches in the vicinity.

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Remarks on slug occurrence, harmfulness and activity connected with penetration of ground

100%

Kozlowska M., Kozlowski J.

Journal of Plant Protection Research

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2004

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tom 44

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nr 4

The intensity of Arion lusitanicus occurrence and the damage degree of 31 crop species have been estimated. It has been found that the slug damaged lettuce and cabbage plants very heavily (Lactuca sativa L. var. capitata L., Brassica oleracea L. var. capitata L. f. alba) and many species of other vegetables (Cucumis sativus L., Phaseolus vulgaris L., Raphanus sativus L. subvar. radicula Pers.). Plant damages in the edge strips were also observed on rape and barley plantations attacked by this slug. The moving activity of particular individuals of Arion lusitanicus was varying. Planning of the experiments in a nested block design has made it possible to statistically determine tendencies of the slug movement. It was observed that when some individuals remained at the point where they were initially placed, others, 2 hours after, moved over 7 m away. The mean weighed length of pathway covered by a single individual and the mean movement rate of one were estimated for each of 9 observation dates. It has been found that slugs penetrating the site surface under observation displayed their tendencies to move towards more moist places and towards food sources.

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Wplyw systemu utrzymania i zywienia na behawior rosnacych swin

51%

Kozera W., Karpiesiuk K., Falkowski J.

Acta Scientiarum Polonorum. Zootechnica

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2009

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tom 08

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nr 4

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Ograniczanie wyników

1 Acta Scientiarum Polonorum. Zootechnica

1 Journal of Plant Protection Research

1 Polish Journal of Ecology

1 Falkowski J.

1 Karpiesiuk K.

1 Kostrakiewicz-Gieralt K.

1 Kozak M.

1 Kozera W.

1 Kozlowska M.

1 Kozlowska-Kozak K.

1 Kozlowski J.

1 2015

1 2009

1 2004

The impact of extensive sheep grazing on the population and individual traits of Trollius altissimus Crantz

Remarks on slug occurrence, harmfulness and activity connected with penetration of ground

Wplyw systemu utrzymania i zywienia na behawior rosnacych swin