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Short-term effects of forest disturbances on soil nematode communities in European mountain spruce forests

Published online by Cambridge University Press:  10 October 2012

A. Čerevková*
Affiliation:
Institute of Parasitology SAS, Hlinková 3, 040 01, Košice, Slovak Republic
M. Renčo
Affiliation:
Institute of Parasitology SAS, Hlinková 3, 040 01, Košice, Slovak Republic
L. Cagáň
Affiliation:
Slovak Agricultural University, A. Hlinku 2, 94 976, Nitra, Slovak Republic
*
* E-mail: cerev@saske.sk

Abstract

The nematode communities in spruce forests were compared with the short-term effects of forest damage, caused by windstorm, wildfire and management practices of forest soils. Soil samples were collected in June and October from 2006 to 2008 in four different sites: (1) forest unaffected by the wind (REF); (2) storm-felled forest with salvaged timber (EXT); (3) modified forest affected by timber salvage (wood removal) and forest fire (FIR); and (4) storm-felled forest where timber had been left unsalvaged (NEX). Nematode analysis showed that the dominant species in all four investigated sites were Acrobeloides nanus and Eudorylaimus silvaticus. An increase of A. nanus (35% of the total nematode abundance) in the first year in the FIR site led to the highest total abundance of nematodes compared with other sites, where nematode abundance reached the same level in the third year. In the FIR site bacterial feeders appeared to be the most representative trophic group, although in the second and third year, after disturbance, the abundance of this trophic group gradually decreased. In the NEX site, the number of nematode species, population densities and Maturity Index were similar to that recorded for the FIR site. In EXT and NEX sites, the other dominant species was the plant parasitic nematode Paratylenchus microdorus. Analyses of nematodes extracted from different forest soil samples showed that the highest number of species and diversity index for species (H'spp) were in the REF site. Differences between the nematode fauna in REF and other localities were clearly depicted by cluster analysis. The greatest Structure Index and Enrichment Index values were also in REF. In the EXT site, the number of nematode species, their abundance, H'spp and Maturity Index were not significantly different from those recorded in the reference site.

Type
Research Papers
Copyright
Copyright © Cambridge University Press 2012 

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