English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/56365
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE
Exportar a otros formatos:


Short-range spatial variability of soil physico-chemical variables related to earthworm clustering in a neotropical gallery forest

AuthorsJiménez, Juan J. ; Decaëns, Thibaud; Amézquita, Edgard; Rao, Idupulapati; Thomas, Richard J.; Lavelle, Patrick
Spatial distribution
Mantel test
Soil fauna
Community assembly
Gallery forest
Issue DateMay-2011
CitationSoil Biology and Biochemistry 43(5) :1071–1080 (2011)
Abstract[EN] In this study, we investigated the spatial distribution of an earthworm community together with the heterogeneity of selected soil properties in a gallery forest (GF) of the Colombian “Llanos”. We performed fine-scale spatial variability by intensively sampling 100 points distributed in the nodes of a regular grid with 5 m inter-sample distance. Non-parametric statistics were used and included SADIE analysis and partial Mantel test, in addition to geostatistics (semi-variograms) and correlogram computation. Our results indicated that the spatial distribution of earthworms was characterized by areas of presence (patches) and absence (gaps), although the general pattern was random at the scale of this study (<5 m), while soil physico-chemical characteristics showed a clumped spatial distribution. Contrary to previous results reported for the nearby savanna, a significant spatial association was found for two competing endogeic species Andiodrilus sp. and Glossodrilus sp. in the GF. Semi-variograms of soil environmental factors were adjusted to model families most commonly used (spherical and linear), and correlograms for earthworms showed significant positive and negative spatial autocorrelation for lag distances <15 m and >30 m, respectively. Partial Mantel test revealed specific significant relationships between soil variables and some species. The earthworm community of the GF displayed a random structure in a spatially clumped soil environment, and our results suggested that spatial distribution observed for some species could be the result of preferential selection of soil environmental factors. In other words, soil heterogeneity contributed to the formation of population patches for some earthworm species. The variability of suitable sites (resource availability patchiness) exerted an influence in the spatial distribution of earthworms at the scale used in this study, and we identified the spatial scale at which both environmental heterogeneity could influence and express earthworm impact on soil properties.
Description41 páginas, 6 tablas, 2 figuras
Publisher version (URL)http://dx.doi.org/10.1016/j.soilbio.2011.01.028
Appears in Collections:(IPE) Artículos
Files in This Item:
File Description SizeFormat 
Jimenez_etal_FinallyAccepted_31Jan2011.pdf1,01 MBAdobe PDFThumbnail
Show full item record
Review this work

Related articles:

WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.