Data/hora: 18/06/2024 13:19:05

Biblioteca(s): | Embrapa Florestas.
Data corrente: | 16/09/2008
Data da última atualização: | 16/09/2008
Autoria: | DUBS, F.; DECAËNS, T.; HEDDE, M.; GEOFFROY, J. J.; BOUTH, M. le; GARNIER, A.; BOGUCKI, C.; LANGLOIS, E.; BUREAU, F.; MARGERIE, P.; AUBERT, M.; LAVELLE, P.
Título: | Surrounding landscape effects on local community of soil macrofauna detritivore.
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:

While habitat quality is known to influence species occurrence at a focal site, local diversity
within habitat patches also depends on the structure of the surrounding landscape and the
associated constraints on species dispersion. Thus, it is quite obvious that habitat constraints
are not enough to explain variability in local species composition between patches with different
land uses, and that we need to consider landscape context to improve the power of explanatory
environmental factors. In this study, we assessed the importance of ?neighbouring or matrix
effect? on the structure of soil fauna detritivore communities (diplopods, isopods and earthworms)
from a data set collected in 5 landscape 1 km2 windows replicated in 2 regions in France and
representing a gradient of 5 levels of landscape intensification. In each window, we identified 16
points regularly distributed 200m apart from each other as follow and, on each of them, was
sampled fauna with a combination of hand sorting and formaldehyde extraction on 3 replicates
of 25 ? 25 cm. Invertebrates were identified to species and counted. We used canonical
correspondence analysis and partial canonical ordination to assess the respective impact of
surrounding landscape vs. habitat constraints. Hypothetical driving factors were categorised as
follows: habitat quality by soil, habitat and management types and surrounding landscape by
composition and configuration of habitat around the sampling point.
We found that the surrounding landscape composition (proportion and diversity of different habitat
types) and configuration (shape and dispersion of habitats) had significant effects on the structure
of soil macrofauna detritivore communities with different local communities in 1) forested
surrounding landscape, 2) heterogeneous surrounding landscape, 3) grassland surrounding
landscape and 4) crop surrounding landscape. Habitat quality also dramatically influenced the
diversity and abundance of detritivore macroinvertebrates. Significant differences were found
between: 1) habitat with mowing, organic, permanent grassland, 2) habitat with changing land
uses, fertilised crops and grazing pastures, and 3) managed forest habitats. The variance
partitioning between the three sets of environmental variables showed that habitat quality factors
were the most influencing, followed by surrounding landscape composition and surrounding
landscape structure.

Categoria do assunto: | --
Registro original: | Embrapa Florestas (CNPF)
Exemplares: | CNPF - (43587-1) - UPE - PL - -- - CD0305 -  -  - DIS