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Wpływ dżdżownic na zespoły skoczogonek (Collembola) w uprawach trawiastych jedno i wielogatunkowych

100%
Olejniczak I., Makulec G.
Studia Ecologiae et Bioethicae
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2014
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vol. 12
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issue 3
83-97
EN
In 2004-2005 a lysimetric experiment was designed to determine whether and how plant diversity and earthworms could influence diversity and densities of collembolan communities. We compared two grass cultures: monoculture of Festuca rubra L. and a polyculture, the mixture of grasses (8 species) commonly used in agriculture. In addition to two plant communities of different diversity, we used in our experiments an engineering species of earthworm – Aporrectodea caliginosa (Sav.). The experiment was initiated in May 2004, when the lysimeters were sown with F. rubra or with a mixture of grasses. The following year, in May 2005, we introduced 6 individuals (that correspond with average densities of 200 ind.m-2 in natural environment ) of A. caliginosa to half of the lysimeters. In experiments we used plastic lysimeters, 450 cm2 in area and 20 cm high, filled with alluvial coarse sandy soil. The same soil was used in environment of the lysimeters. Soil samples were taken at the depths of 0-5cm, 5-10cm, 10-15cm and 15-20cm, before introducing earthworms and after 60, 120 and 180 days from introducing earthworms. On each occasion, samples were taken from six or ten lysimeters in each variant of the experiment. Soil samples were taken from central parts of lysimeter to avoid the edge effect. Springtails were extracted in the Tullgren’s apparatus and then were determined basing on Stach’s (1955) and Fjellberg’s (1998, 2007) keys and taxonomic paper of Rusek (1982). For statistical analysis we used nonparametric tests. Species diversity of Collembola communities was calculated according to Shannon-Wiener equation using logarithms at a base of 2 (Shannon and Wiener 1963). Hutcheson’s test was used to determine the statistical significance of differences between the H indices (Hutcheson 1970). Three ecological groups were distinguished among collembolans basing on their preference to soil layer: epigeic, hemiedaphic and euedaphic (Christiansen 1964). We found that soil layer (Kruskal-Wallis test: N = 432, H=18,25, P=0,0004), biodiversity of grass culture (N=432, H=14,59, P=0,0001) and the period of the season (N=432, H=24,24, P=,00000) had an important effect on densities of collembolan communities independently of earthworms presence (N=432, H=1,99, P=0,16). We found 18 species of springtails and the number of species decreased with soil layer. The most abundant were Cryptopygus bipunctatus and Isotomodes productus.
2
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Reakcja mezofauny (Collembola and Acarina) zamieszkująca łąki na mineralnych i organicznych glebach, na wiosenne doświadczalne pożary

81%
Olejniczak I., Russel S., Prędecka A.
Studia Ecologiae et Bioethicae
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2014
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vol. 12
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issue 3
121-134
EN
The impact of spring experimental fires on collembolan and mite communities was studied in this field experiment. In April 2008, experimental plots of 1m2 in size were chosen and burnt. Samples were taken just after fire, and 3, 7 and 12 months following the fire, in burnt plots, at the border of burnt plots and in surroundings (control). The impact of spring experimental fire on mesofauna was ambiguous. But it seems that effects of spring fires were more severe in the case of springtails than for mites.
3
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Springtails (Collembola, Hexapoda) inhabiting algae with different degrees of waste product contamination

81%
Olejniczak I., Boniecki P., Kaliszewicz A., Panteleeva N.
Studia Ecologiae et Bioethicae
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2015
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vol. 13
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issue 4
135-142
EN
The study was carried out in July 2009 in Murmansk (68°57’ N; 33°03’E) and involved algae that had washed up at the edge of the intertidal zone of Kola Bay. Two areas of algae were selected for this study: uncontaminated (algae I) and algae contaminated with waste products (algae II). The material was collected using a frame with an area of 100 cm2. A total of 40 samples were taken. The abundance of the springtails was almost three times lower in the contaminated algae than in the uncontaminated algae, whereas the species diversity of the springtail communities was much higher in the contaminated algae. The littoral species Hypogastrura viatica was the dominant species in the uncontaminated algae, and that in the contaminated algae was the cosmopolitan species Folsomia quadriuculata. It appears that the contamination of the algae with waste products can promote the intensification of competition among springtails and between springtails and other saprophagous invertebrates
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