Data/hora: 01/06/2024 04:40:16

Biblioteca(s): | Embrapa Florestas.
Data corrente: | 18/09/2008
Data da última atualização: | 18/09/2008
Autoria: | MONDINO, E. A.; OLIVEIRA, C. P. de; SOUZA, N. B. de; TAVARES, O. C. H.; BERBARA, R. L. L.
Título: | The nematodes communities associated to different vegetable formations in the Restinga of Marambaia RJ, Brazil.
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:

Restingas are a group of the vegetable communities, with different physiognomies, under sea
and fluvio influence. These communities, distributed in mosaic, are found in areas of great
ecological diversity being considered edafics communities as they depend more on the nature
of the soil than that of the climate. The nematodes community?s structure offers an important and
efficient instrument for biological evaluation of the quality and functionality of the soils. Soil
nematodes not only reflect the soil processes but also influence it. Nematodes community?s
indexes can be used to monitor the ecological conditions of the soil. The Objective of this work
was to evaluate the nematode?s community in relation to the different vegetable formations in
the Restinga da Marambaia. The nematologic fauna was monitored in the Restinga, coast
south of the state of Rio de Janeiro. The samples were taken in July of 2006 (scarce rains in the
winter) in three vegetable physiognomies: (A) herbaceous vegetation of sandy string
(homogeneous habitat), (B) Shrublayer open non swamp and (C) forest of sandy string
(heterogeneous habitats). The composed sample was collected at 20 cm of depth in zig-zag,
with six points from representative vegetable areas. For nematodes extraction it was used the
flotation-centrifugation. The identification was done under microscope, up to the gender category,
being used of the vast literature on the theme. The Abundance was Calculated (number ind. /
100 ml soil), it Structures Trophic and the indexes: Shannon (H?), Simpson (D) and evenness
(J´), maturity (MI), enrichment (MI2-5) and parasitism (PPI). Ten genus and one family were
identified. 6 genus were described in A and B and 5 in C, and the density of the nematodes was
of 20, 26, 49 ind.100ml-1 of soil respectively. There were more individuals plant feeders in the
most heterogeneous environment (C) than in A and B (100, 90 and 89%). It was determined in
the most homogeneous environment the largest presence of Hemycicliophora (70%) in A,
Dolichodorus (32%), Criconemela (26%) and Dorylaimellus (21%) in B, and Criconema (50%)
in the most heterogeneous environment (C). B presented H? 1,56; J (0,87) and D (0,21). The
area C presented larger D (0,86) due to the high presence of Criconema, and the environment
A presented intermediate values of the indexes. MIs were larger for A and B. In the case of C MI
it was zero, for only to present nematodes plant feeders, being larger IPP. Shrublayer open non
swamp (B) was determined as the more stable environment by presenting larger diversity,
evenness and index of maturity modified (ÓMI).

Categoria do assunto: | --
Registro original: | Embrapa Florestas (CNPF)
Exemplares: | CNPF - (43629-1) - UPE - PL - -- - CD0305 -  -  - DIS