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Changes in soil nematode community structure following warming and drought manipulations in a grassland mesocosm experiment

Ilieva-Makulec K., De Boeck H. J.

Polish Journal of Ecology

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2013

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Vol. 61, nr 1

157--163

EN

The response of soil nematodes to simulated in spring, summer and autumn periods of warming and drought were studied in a grassland mesocosm experiment. The abundance, diversity and some community parameters of nematodes were analysed at different times after the end of the extreme events – 170 days after the spring treatment, 90 days after the summer treatment and 22 days after the autumn treatment. Among studied parameters the abundance of nematode trophic groups, taxonomic richness and diversity were found to be sensitive to changes in the soil system caused by extremes. Our results showed that warming and drought did not cause predictable shifts in nematode communities. Moreover the extremes’ after-effect was not unidirectional with time. The periods of warming and drought induced a positive or negative long lasting influence on nematodes, and the outcome seems to depend on season, the nematode trophic group or even the nematode taxon.

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Response of soil nematodes to climate-induced melting of antarctic glaciers

Ilieva-Makulec K., Gryziak G.

Polish Journal of Ecology

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2009

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Vol. 57, nr 4

811-816

EN

Nematode colonization and establishment of nematode communities on icefree areas created by the recession of Antarctic glaciers were studied on the Antarctic Specially Protected Area (ASPA) No. 128 (Western coast of Admiralty Bay, King George Island, South Shetlands Islands). Soil samples were taken along three transects marked between sea shore and Ecology Glacier, Baranowski Glacier and Windy Glacier and assigned to four age-class intervals: 0-7, >7-29, >29-52 and >52 years after the retreat of the glaciers. Changes in nematode communities, in terms of abundance, diversity and trophic structure were related to the duration of the ice-free period. The abundance of nematodes increased with the age of ice-free areas. The highest numbers of nematodes were found on the sites free of ice for more than 52 years. Taxonomic and trophic diversity of nematodes on these sites was also significantly higher in comparison to the rest sites. Nematode communities on the sites from the first three age-class intervals were poor in genera (up to 6 genera) while on the oldest sites in total 16 genera of nematodes were found. A trend of increasing the number of nematode trophic groups along the age classes was also apparent - from community of nematodes belonging to only two trophic groups (bacterial and fungal feeders) on younger ice-free sites to more complex community of nematodes (belonging to five trophic groups), at the oldest sites.

3

Wpływ metali ciężkich zawartych w odpadach z huty ołowiu na zespoły nicieni glebowych

Ilieva-Makulec K., Dmowska E.

Chemia i Inżynieria Ekologiczna

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1998

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Vol. 5, nr 8-9

707-711

PL

Badano działanie następcze metali ciężkich Cd, Zn i Pb na nicienie glebowe po wapnowaniu. Badania prowadzono na poletkach doświadczalnych wapnowanych trzykrotnie wapnem z kopalni węgla brunatnego w dawce dwa razy większej niż hydrolityczna kwasowość gleby (2Hh), wapnowanych dwukrotnie i trzykrotnie odpadami z huty ołowiu (2h) oraz niewapnowanych. Analiza gleby przeprowadzona w roku pobierania prób, tj. wiosną 1996 r., wykazała różnice w zawartości metali ciężkich w glebie badanych poletek. W glebie wapnowanej trzykrotnie odpadami z huty ołowiu, najbardziej skażonej metalami ciężkimi, zawartość Cd i Zn po czterech latach po wapnowaniu była bliska ilości przewidzianej dla gleb o podwyższonym stopniu skażenia. W glebie tej stwierdzono istotnie niższą liczebność nicieni bakteriożernych, grzybożernych i roślinożernych oraz mniejszą różnorodność rodzajową nicieni niż w pozostałych glebach.

EN

The effect of heavy metals Cd, Zn and Pb on soil nematodes was investigated after liming. Some of the experimental fields were treated three times with lime (2Hh) from the brown coal mine or twice or three times treated with lime waste (2Hh) from lead-works and other were untreated. Chemical analysis of soil from the test fields in the year of sampling, spring 1996 showed some differences in heavy metal contains. In soil with the highest content of Cd, Pb and Zn (three times repeated usage of lime waste from lead-works) the abundance of bacterial-feeding, fungal-feeding and plant-feeding and also genera diversity were significant lower then in the other soils.