Subtitle:

The influence of acid rain on soil Nematode communities

Contributor:

Polska Akademia Nauk. Instytut Ekologii

Publisher:

Oficyna Wydawnicza Instytutu Ekologii PAN

Place of publishing:

Dziekanów Leśny

Description:

Pages 73-110 : illustrations ; 24 cm ; Bibliographical references (pages 104-110) ; Abstract in Polish

Type of object:

Journal/Article

Abstract:

Taxonomic and trophic structure were described – along with indices of diversity and maturity – for nematode communities at six sites influenced by acid rain in the chain of the Karkonosze Mountains and at Hala Izerska (both in south-west Poland). The sites in question were spruce (Picea abies) forest with clear or else relatively limited signs of degradation, with the intensity of this phenomenon being determined in relation to the incidence of treefall, young spruce stands, and grass-herb communities. lntensified degradation was found to reduce the diversity and maturity of nematode communities and to increase the numerical representation of fungivorous species. Dry conditions intensified these changes. The nematode communities of the aforementioned mountainous areas contaminated by acid rain were then compared with those studied by author about 20 years previously in other parts of Poland and considered uncontaminated. Communities from the contaminated areas were not found to have lower total numbers of nematodes, but did differ in the higher representation of fungivores and obligate plant parasites as well as in the absence of predators. A shift in the direction of feeding on fungi was noted among species feeding on reducers. Aspects unique to these communities which were noted on the scale of trophic differentiation were the loss of characteristic K-strategists (specially predators), and also loss of bacterivorous r-strategists in favour of more K-strategic bacterivores.

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Ekologia Polska

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44

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1-2

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73

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110

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eng

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pol

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