Data/hora: 11/06/2024 13:38:37

Biblioteca(s): | Embrapa Florestas.
Data corrente: | 08/10/2008
Data da última atualização: | 08/10/2008
Autoria: | PI?L, V.; ZEITHAML, J.; SKLENIÈKA, P.
Título: | Earthworm assemblages in a forest-arable field ecotone and their relations with soil properties.
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:

Earthworm assemblages and their relationships with selected physical and chemical parameters
of soil were assessed at five sites representing forest-field ecotone. The sites were located in
Central Bohemia, Czech Republic and they differed in the type of crop rotation used. At each
site, earthworm sampling were carried out in seven parallel rows perpendicular to the transect
from the oak forest to the centre of the field in spring and autumn 2001-2003. Individual rows
were located: in the forest (5 m from the edge), in the forest edge, and in the field in distances of
5, 10, 25, 50 and 100 m from the edge of the forest. Six samples (each 625 cm2 of area and 30
cm in depth) were taken in each row. Digging and hand sorting of soil samples, followed by
formalin application was used for the extraction of earthworms.
Per site means of density and biomass ranged from 46.8 - 86.9 ind.m-2 and 23.38 - 43.50 g.m-
2 respectively. The position within the transect affected significantly the density and biomass of
earthworm populations. In general, both parameters were the lowest in forest interior, increased
markedly in the forest edge, decreased again in the distance of 5 and/or 10 metres from the
forest edge and then continuously increased with increasing distance from the field boundary.
The same pattern was observed at all sites and years of the study.
Eleven species and subspecies of earthworms were identified, among which Aporrectodea
caliginosa predominated (85%). Per site species number varied from 7 to 10. The highest
number of species was found in the forest edge and in the field boundary. There were differences
between individual species in their distribution across the transect: endogeic Aporrectodea
caliginosa and Proctodrilus antipai preferred arable soil, while epigeic (Dendrobaena octaedra,
Lumbricus rubellus) and anecic (Lumbricus terrestris) earthworms showed strong affinity to the
forest edge.
Both density and biomass of earthworms were strongly correlated with soil organic matter content
and with the porosity of soil and water infiltration rate.

Categoria do assunto: | --
Registro original: | Embrapa Florestas (CNPF)
Exemplares: | CNPF - (43868-1) - UPE - PL - -- - CD0305 -  -  - DIS