Data/hora: 02/06/2024 12:37:07

Biblioteca(s): 	Embrapa Florestas.	
Data corrente: 	02/10/2008	
Data da última atualização: 	02/10/2008	
Autoria: 	TAJOVSKÝ, K.; PI?L, V.; HÁNÌL, L.; STARÝ, J.; FROUZ, J.; AUROVÁ, K.; KALÈÍK, J.	
Título: 	Do high ungulate densities stress soil fauna in temperate forest ecosystems?	
Ano de publicação: 	2008	
Fonte/Imprenta: 	In: INTERNATIONAL COLLOQUIUM ON SOIL ZOOLOGY, 15; INTERNATIONAL COLLOQUIUM ON APTERYGOTA, 12., 2008, Curitiba. Biodiversity, conservation and sustainabele management of soil animal: abstracts. Colombo: Embrapa Florestas. Editors: George Gardner Brown; Klaus Dieter Sautter; Renato Marques; Amarildo Pasini. 1 CD-ROM.	
Idioma: 	Inglês	
Conteúdo: 	The effects of ungulate grazing on vegetation structure and composition in forest ecosystems
as well as its influence on small mammals, birds and/or aboveground invertebrates have been
frequently studied and analysed. Little is however known about the impact of ungulates on soil
fauna. In temperate woodlands, indirect effects are mainly expected, mediated through the
changes in aboveground vegetation, amount and quality of litter, and changes in microhabitat
structures and microclimate conditions at the surface and in upper layers of soil.
The research was carried out at three sites (beech, xerothermic oak and oak-hornbeam forests)
located in the Køivoklátsko Biosphere Reserve, Czech Republic. Permanent plots were
established and fenced at each site in 1993, primarily for the long-term monitoring of vegetation.
Soil sampling was performed in 1994-1995 to analyse the communities of nematodes,
earthworms, oribatid mites, centipedes, millipedes and terrestrial isopods. The same sampling
pattern was repeatedly used in 2006-2007, both inside and outside fenced plots to assess
long-term changes of soil fauna in ungulates-free forests and to evaluate the impact of ungulate
activities.
During the last decade, densities of earthworms and millipedes significantly decreased at
unaffected plots which could be at least partly explained by the decline of annual precipitations
and partial desiccation of forests. On the other hand, densities of nematodes, oribatid mites
and terrestrial isopods increased.
The comparison of soil fauna communities at fenced and open plots showed the positive effects
of ungulate elimination on the density of terrestrial isopods (in all forest types), earthworms (in
beech and xerothermic oak forests), oribatid mites (in oak-hornbeam forest) and millipedes (in
beech forest). Nevertheless, no marked differences in the structure of their communities were
observed except for higher proportion of stress-tolerant oribatid mites at open plots. On the
contrary, communities of soil nematodes were denser at open than at fenced plots, where
significantly lower proportions of mycophagous and phyto-mycophagous nematodes were
recorded.
The results indicate that long-term browsing and grazing activities of ungulates may represent
important factors influencing the persistence and development of soil invertebrate communities
in temperate forests.
The research was supported by the Czech Science Foundation, project No. 526/06/1348, and
by the Academy of Sciences of the Czech Republic, Research Plan No. AV0Z60660521	
Categoria do assunto: 	--	
Registro original: 	Embrapa Florestas (CNPF)	
Exemplares: 	CNPF - (43782-1) - UPE - PL - -- - CD0305 -  -  - DIS