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Registro Completo |
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
25/09/2008 |
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Data da última atualização: |
25/09/2008 |
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Autoria: |
JIMÉNEZ, J. -J.; DECAENS, T. |
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Título: |
Species co-occurrence and spatial pattern of earthworm community related to soil heterogeneity in a Neotropical gallery forest. |
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Ano de publicação: |
2008 |
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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. |
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Idioma: |
Inglês |
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Conteúdo: |
Competitive interactions and environmental factors act as filters and both determine community
assembly at different scales. The description of species co-occurrence patterns through relevant
null-model analysis has been seldom addressed for soil animals in the scientific literature. In
this study, we assessed the spatial distributional features of an earthworm community and
selected soil properties in a gallery forest of the Colombian ?Llanos?. Non-parametric statistical
tools, namely Spatial Analysis Distance IndicEs (SADIE), Null-model (Co-occurrence) analysis,
and Partial Mantel test combined with multivariate analyses (correspondence and Co-Inertia
analyses) were used. Our hypotheses were: i) species of the gallery forest co-occur at shortscale
by occupying different areas of varying physico-chemical properties, and ii) the species
co-occurrence pattern is not structured by competition.
At the local scale of our study (tens of meters) earthworm species co-occurred more frequently
than expected by chance (EBC), and the C-score was significantly different to the observed
value only for one algorithm (fixed-proportional). The SADIE analyses confirmed the presence
of small patches and gaps of varying size. The number of clusters (i.e. patches or gaps) ranged
from a minimum of 2 to a maximum of 7. SADIE analysis also confirmed the randomness pattern
of the spatial distribution of species. A significant species association and dissociation was
observed for different pair of species.
The Co-Inertia analysis showed the correlation between earthworms and soil variables, and the
Partial Mantel test revealed which soil variable was significantly linked to the spatial distribution
of species, which seemed to be species-specific. Compared to other studies conducted in the
area, and where a clear opposite spatial pattern was detected for two species, there was no
significant spatial exclusion in the gallery forest. This might be an indication of no resource use
limitation in this ecosystem, although this hypothesis needs to be tested further. In conclusion
the earthworm community of the gallery forest was not structured by interspecific competition,
although species showed a patchy distribution in space. MenosCompetitive interactions and environmental factors act as filters and both determine community
assembly at different scales. The description of species co-occurrence patterns through relevant
null-model analysis has been seldom addressed for soil animals in the scientific literature. In
this study, we assessed the spatial distributional features of an earthworm community and
selected soil properties in a gallery forest of the Colombian ?Llanos?. Non-parametric statistical
tools, namely Spatial Analysis Distance IndicEs (SADIE), Null-model (Co-occurrence) analysis,
and Partial Mantel test combined with multivariate analyses (correspondence and Co-Inertia
analyses) were used. Our hypotheses were: i) species of the gallery forest co-occur at shortscale
by occupying different areas of varying physico-chemical properties, and ii) the species
co-occurrence pattern is not structured by competition.
At the local scale of our study (tens of meters) earthworm species co-occurred more frequently
than expected by chance (EBC), and the C-score was significantly different to the observed
value only for one algorithm (fixed-proportional). The SADIE analyses confirmed the presence
of small patches and gaps of varying size. The number of clusters (i.e. patches or gaps) ranged
from a minimum of 2 to a maximum of 7. SADIE analysis also confirmed the randomness pattern
of the spatial distribution of species. A significant species association and dissociation was
observed for different pair of s... Mostrar Tudo |
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Categoria do assunto: |
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Marc: |
LEADER 02932naa a2200133 a 4500
001 1314945
005 2008-09-25
008 2008 bl uuuu u00u1 u #d
100 1 $aJIMÉNEZ, J. -J.
245 $aSpecies co-occurrence and spatial pattern of earthworm community related to soil heterogeneity in a Neotropical gallery forest.
260 $c2008
520 $aCompetitive interactions and environmental factors act as filters and both determine community assembly at different scales. The description of species co-occurrence patterns through relevant null-model analysis has been seldom addressed for soil animals in the scientific literature. In this study, we assessed the spatial distributional features of an earthworm community and selected soil properties in a gallery forest of the Colombian ?Llanos?. Non-parametric statistical tools, namely Spatial Analysis Distance IndicEs (SADIE), Null-model (Co-occurrence) analysis, and Partial Mantel test combined with multivariate analyses (correspondence and Co-Inertia analyses) were used. Our hypotheses were: i) species of the gallery forest co-occur at shortscale by occupying different areas of varying physico-chemical properties, and ii) the species co-occurrence pattern is not structured by competition. At the local scale of our study (tens of meters) earthworm species co-occurred more frequently than expected by chance (EBC), and the C-score was significantly different to the observed value only for one algorithm (fixed-proportional). The SADIE analyses confirmed the presence of small patches and gaps of varying size. The number of clusters (i.e. patches or gaps) ranged from a minimum of 2 to a maximum of 7. SADIE analysis also confirmed the randomness pattern of the spatial distribution of species. A significant species association and dissociation was observed for different pair of species. The Co-Inertia analysis showed the correlation between earthworms and soil variables, and the Partial Mantel test revealed which soil variable was significantly linked to the spatial distribution of species, which seemed to be species-specific. Compared to other studies conducted in the area, and where a clear opposite spatial pattern was detected for two species, there was no significant spatial exclusion in the gallery forest. This might be an indication of no resource use limitation in this ecosystem, although this hypothesis needs to be tested further. In conclusion the earthworm community of the gallery forest was not structured by interspecific competition, although species showed a patchy distribution in space.
700 1 $aDECAENS, T.
773 $tIn: 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.
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Registro original: |
Embrapa Florestas (CNPF) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Cerrados. Para informações adicionais entre em contato com cpac.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Cerrados. |
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Data corrente: |
15/07/2008 |
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Data da última atualização: |
15/07/2008 |
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Tipo da produção científica: |
Artigo de Divulgação na Mídia |
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Autoria: |
SANO, S. M.; MELO, J. T. de. |
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Afiliação: |
Sueli Matiko Sano, CPAC; José Teodoro de Melo, CPAC. |
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Título: |
Curiosidades sobre sementes do Cerrado. |
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Ano de publicação: |
2007 |
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Fonte/Imprenta: |
In: GAMA, L. C. (Org.). Artigos publicados na mídia: coletânea 2007. [Planaltina, DF: s.n.], 2007. |
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Idioma: |
Português |
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Notas: |
Publicado no Agrosoft Brasil em 11 jun. 2007. |
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Palavras-Chave: |
Fruta nativa. |
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Thesagro: |
Cerrado; Semente. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 00514naa a2200169 a 4500
001 1570730
005 2008-07-15
008 2007 bl uuuu u00u1 u #d
100 1 $aSANO, S. M.
245 $aCuriosidades sobre sementes do Cerrado.
260 $c2007
500 $aPublicado no Agrosoft Brasil em 11 jun. 2007.
650 $aCerrado
650 $aSemente
653 $aFruta nativa
700 1 $aMELO, J. T. de
773 $tIn: GAMA, L. C. (Org.). Artigos publicados na mídia: coletânea 2007. [Planaltina, DF: s.n.], 2007.
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