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Soil does not explain monodominance in a Central African tropical forest

Soil does not explain monodominance in a Central African tropical forest
Soil does not explain monodominance in a Central African tropical forest
Background: Soil characteristics have been hypothesised as one of the possible mechanisms leading to monodominance of Gilbertiodendron dewerei in some areas of Central Africa where higher-diversity forest would be expected. However, the differences in soil characteristics between the G. dewevrei-dominated forest and its adjacent mixed forest are still poorly understood. Here we present the soil characteristics of the G. dewevrei forest and quantify whether soil physical and chemical properties in this monodominant forest are significantly different from the adjacent mixed forest.

Methodology/Principal Findings: We sampled top soil (0–5, 5–10, 10–20, 20–30 cm) and subsoil (150–200 cm) using an augur in 6 × 1 ha areas of intact central Africa forest in SE Cameroon, three independent patches of G. dewevrei-dominated forest and three adjacent areas (450–800 m apart), all chosen to be topographically homogeneous. Analysis – subjected to Bonferroni correction procedure – revealed no significant differences between the monodominant and mixed forests in terms of soil texture, median particle size, bulk density, pH, carbon (C) content, nitrogen (N) content, C:N ratio, C:total NaOH-extractable P ratio and concentrations of labile phosphorous (P), inorganic NaOH-extractable P, total NaOH-extractable P, aluminium, barium, calcium, copper, iron, magnesium, manganese, molybdenum, nickel, potassium, selenium, silicon, sodium and zinc. Prior to Bonferroni correction procedure, there was a significant lower level of silicon concentration found in the monodominant than mixed forest deep soil; and a significant lower level of nickel concentration in the monodominant than mixed forest top soil. Nevertheless, these were likely to be the results of multiple tests of significance.

Conclusions/Significance: Our results do not provide clear evidence of soil mediation for the location of monodominant forests in relation to adjacent mixed forests. It is also likely that G. dewevrei does not influence soil chemistry in the monodominant forests.
1932-6203
e16996
Peh, Kelvin S.-H.
0bd60207-dad8-43fb-a84a-a15e09b024cc
Sonké, Bonaventure
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Lloyd, Jon
e0fc723c-e3bd-49e1-8f60-14f34090ae34
Quesada, Carlos A.
4473e39a-cd8a-4313-9483-5f71c5c96dd9
Lewis, Simon L.
0442a91d-93f1-48ee-aca3-1a4757f0c7fa
Peh, Kelvin S.-H.
0bd60207-dad8-43fb-a84a-a15e09b024cc
Sonké, Bonaventure
7b0779d1-888b-465b-99d9-11695ab93ccd
Lloyd, Jon
e0fc723c-e3bd-49e1-8f60-14f34090ae34
Quesada, Carlos A.
4473e39a-cd8a-4313-9483-5f71c5c96dd9
Lewis, Simon L.
0442a91d-93f1-48ee-aca3-1a4757f0c7fa

Peh, Kelvin S.-H., Sonké, Bonaventure, Lloyd, Jon, Quesada, Carlos A. and Lewis, Simon L. (2011) Soil does not explain monodominance in a Central African tropical forest. PLoS ONE, 6 (2), e16996. (doi:10.1371/journal.pone.0016996).

Record type: Article

Abstract

Background: Soil characteristics have been hypothesised as one of the possible mechanisms leading to monodominance of Gilbertiodendron dewerei in some areas of Central Africa where higher-diversity forest would be expected. However, the differences in soil characteristics between the G. dewevrei-dominated forest and its adjacent mixed forest are still poorly understood. Here we present the soil characteristics of the G. dewevrei forest and quantify whether soil physical and chemical properties in this monodominant forest are significantly different from the adjacent mixed forest.

Methodology/Principal Findings: We sampled top soil (0–5, 5–10, 10–20, 20–30 cm) and subsoil (150–200 cm) using an augur in 6 × 1 ha areas of intact central Africa forest in SE Cameroon, three independent patches of G. dewevrei-dominated forest and three adjacent areas (450–800 m apart), all chosen to be topographically homogeneous. Analysis – subjected to Bonferroni correction procedure – revealed no significant differences between the monodominant and mixed forests in terms of soil texture, median particle size, bulk density, pH, carbon (C) content, nitrogen (N) content, C:N ratio, C:total NaOH-extractable P ratio and concentrations of labile phosphorous (P), inorganic NaOH-extractable P, total NaOH-extractable P, aluminium, barium, calcium, copper, iron, magnesium, manganese, molybdenum, nickel, potassium, selenium, silicon, sodium and zinc. Prior to Bonferroni correction procedure, there was a significant lower level of silicon concentration found in the monodominant than mixed forest deep soil; and a significant lower level of nickel concentration in the monodominant than mixed forest top soil. Nevertheless, these were likely to be the results of multiple tests of significance.

Conclusions/Significance: Our results do not provide clear evidence of soil mediation for the location of monodominant forests in relation to adjacent mixed forests. It is also likely that G. dewevrei does not influence soil chemistry in the monodominant forests.

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Published date: 10 February 2011
Organisations: Centre for Biological Sciences

Identifiers

Local EPrints ID: 352977
URI: http://eprints.soton.ac.uk/id/eprint/352977
ISSN: 1932-6203
PURE UUID: b0606e45-f117-4dc0-be89-02660434a542
ORCID for Kelvin S.-H. Peh: ORCID iD orcid.org/0000-0002-2921-1341

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Date deposited: 22 May 2013 12:25
Last modified: 10 Dec 2019 01:36

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