Tree roots can penetrate deeply in African semi-deciduous rain forests: evidence from two common soil types
Despite the important functional role of deep roots in withdrawing water during drought, direct measurements of root distribution are very rare in tropical rain forests. The aim of this study was to investigate the root distribution of Entandrophragma cylindricum, a common tree species in the Central African semi-deciduous rain forest, in Ferralsols and Arenosols. We dug two pits to a depth of 6 m in Ferralsols and two pits to a depth of 3 m in Arenosols, close to E. cylindricum trees. The vertical soil profiles were divided into 10 × 10-cm grid cells and the roots counted were distributed in three diameter classes. We fitted a root distribution model to our dataset. We found that vertical root distribution was shallower in Arenosols than in Ferralsols. Root penetration was not stopped even by a Ferralsol with high gravel content in its subsoil. Overall, our measurements showed that 95% of all roots were distributed to depths of between 258 and 564 cm from the soil surface, which is much deeper than the 95 cm depth previously reported in the literature for tropical rain forests. As sampling depth could explain this discrepancy, we recommend a sampling depth of at least 3¿5 m to accurately estimate root distribution. The drier the dry season, the deeper the sampling depth should be. Our results are consistent with global models of root distribution in forest ecosystems, which are driven by climate variables. We thus suggest that deep rooting could be common in rain forests with a marked dry season.
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Language: | eng |
Subjects: | K01 - Foresterie - Considérations générales, F62 - Physiologie végétale - Croissance et développement, P33 - Chimie et physique du sol, forêt tropicale humide, racine, enracinement, profil du sol, écologie forestière, ferralsol, aérosol, saison sèche, sécheresse, http://aims.fao.org/aos/agrovoc/c_7976, http://aims.fao.org/aos/agrovoc/c_6651, http://aims.fao.org/aos/agrovoc/c_6649, http://aims.fao.org/aos/agrovoc/c_14402, http://aims.fao.org/aos/agrovoc/c_3044, http://aims.fao.org/aos/agrovoc/c_2858, http://aims.fao.org/aos/agrovoc/c_158, http://aims.fao.org/aos/agrovoc/c_2400, http://aims.fao.org/aos/agrovoc/c_2391, http://aims.fao.org/aos/agrovoc/c_1432, |
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dig-cirad-fr-5745692024-01-28T22:20:37Z http://agritrop.cirad.fr/574569/ http://agritrop.cirad.fr/574569/ Tree roots can penetrate deeply in African semi-deciduous rain forests: evidence from two common soil types. Freycon Vincent, Wonkam Christelle Joëlle, Fayolle Adeline, Laclau Jean-Paul, Lucot Eric, Jourdan Christophe, Cornu Guillaume, Gourlet-Fleury Sylvie. 2015. Journal of Tropical Ecology, 31 (1) : 13-23.https://doi.org/10.1017/S0266467414000595 <https://doi.org/10.1017/S0266467414000595> Tree roots can penetrate deeply in African semi-deciduous rain forests: evidence from two common soil types Freycon, Vincent Wonkam, Christelle Joëlle Fayolle, Adeline Laclau, Jean-Paul Lucot, Eric Jourdan, Christophe Cornu, Guillaume Gourlet-Fleury, Sylvie eng 2015 Journal of Tropical Ecology K01 - Foresterie - Considérations générales F62 - Physiologie végétale - Croissance et développement P33 - Chimie et physique du sol forêt tropicale humide racine enracinement profil du sol écologie forestière ferralsol aérosol saison sèche sécheresse http://aims.fao.org/aos/agrovoc/c_7976 http://aims.fao.org/aos/agrovoc/c_6651 http://aims.fao.org/aos/agrovoc/c_6649 http://aims.fao.org/aos/agrovoc/c_14402 http://aims.fao.org/aos/agrovoc/c_3044 http://aims.fao.org/aos/agrovoc/c_2858 http://aims.fao.org/aos/agrovoc/c_158 http://aims.fao.org/aos/agrovoc/c_2400 http://aims.fao.org/aos/agrovoc/c_2391 Afrique centrale http://aims.fao.org/aos/agrovoc/c_1432 Despite the important functional role of deep roots in withdrawing water during drought, direct measurements of root distribution are very rare in tropical rain forests. The aim of this study was to investigate the root distribution of Entandrophragma cylindricum, a common tree species in the Central African semi-deciduous rain forest, in Ferralsols and Arenosols. We dug two pits to a depth of 6 m in Ferralsols and two pits to a depth of 3 m in Arenosols, close to E. cylindricum trees. The vertical soil profiles were divided into 10 × 10-cm grid cells and the roots counted were distributed in three diameter classes. We fitted a root distribution model to our dataset. We found that vertical root distribution was shallower in Arenosols than in Ferralsols. Root penetration was not stopped even by a Ferralsol with high gravel content in its subsoil. Overall, our measurements showed that 95% of all roots were distributed to depths of between 258 and 564 cm from the soil surface, which is much deeper than the 95 cm depth previously reported in the literature for tropical rain forests. As sampling depth could explain this discrepancy, we recommend a sampling depth of at least 3¿5 m to accurately estimate root distribution. The drier the dry season, the deeper the sampling depth should be. Our results are consistent with global models of root distribution in forest ecosystems, which are driven by climate variables. We thus suggest that deep rooting could be common in rain forests with a marked dry season. article info:eu-repo/semantics/article Journal Article info:eu-repo/semantics/publishedVersion http://agritrop.cirad.fr/574569/1/document_574569.pdf application/pdf Cirad license info:eu-repo/semantics/restrictedAccess https://agritrop.cirad.fr/mention_legale.html https://doi.org/10.1017/S0266467414000595 10.1017/S0266467414000595 info:eu-repo/semantics/altIdentifier/doi/10.1017/S0266467414000595 info:eu-repo/semantics/altIdentifier/purl/https://doi.org/10.1017/S0266467414000595 |
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K01 - Foresterie - Considérations générales F62 - Physiologie végétale - Croissance et développement P33 - Chimie et physique du sol forêt tropicale humide racine enracinement profil du sol écologie forestière ferralsol aérosol saison sèche sécheresse http://aims.fao.org/aos/agrovoc/c_7976 http://aims.fao.org/aos/agrovoc/c_6651 http://aims.fao.org/aos/agrovoc/c_6649 http://aims.fao.org/aos/agrovoc/c_14402 http://aims.fao.org/aos/agrovoc/c_3044 http://aims.fao.org/aos/agrovoc/c_2858 http://aims.fao.org/aos/agrovoc/c_158 http://aims.fao.org/aos/agrovoc/c_2400 http://aims.fao.org/aos/agrovoc/c_2391 http://aims.fao.org/aos/agrovoc/c_1432 K01 - Foresterie - Considérations générales F62 - Physiologie végétale - Croissance et développement P33 - Chimie et physique du sol forêt tropicale humide racine enracinement profil du sol écologie forestière ferralsol aérosol saison sèche sécheresse http://aims.fao.org/aos/agrovoc/c_7976 http://aims.fao.org/aos/agrovoc/c_6651 http://aims.fao.org/aos/agrovoc/c_6649 http://aims.fao.org/aos/agrovoc/c_14402 http://aims.fao.org/aos/agrovoc/c_3044 http://aims.fao.org/aos/agrovoc/c_2858 http://aims.fao.org/aos/agrovoc/c_158 http://aims.fao.org/aos/agrovoc/c_2400 http://aims.fao.org/aos/agrovoc/c_2391 http://aims.fao.org/aos/agrovoc/c_1432 |
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K01 - Foresterie - Considérations générales F62 - Physiologie végétale - Croissance et développement P33 - Chimie et physique du sol forêt tropicale humide racine enracinement profil du sol écologie forestière ferralsol aérosol saison sèche sécheresse http://aims.fao.org/aos/agrovoc/c_7976 http://aims.fao.org/aos/agrovoc/c_6651 http://aims.fao.org/aos/agrovoc/c_6649 http://aims.fao.org/aos/agrovoc/c_14402 http://aims.fao.org/aos/agrovoc/c_3044 http://aims.fao.org/aos/agrovoc/c_2858 http://aims.fao.org/aos/agrovoc/c_158 http://aims.fao.org/aos/agrovoc/c_2400 http://aims.fao.org/aos/agrovoc/c_2391 http://aims.fao.org/aos/agrovoc/c_1432 K01 - Foresterie - Considérations générales F62 - Physiologie végétale - Croissance et développement P33 - Chimie et physique du sol forêt tropicale humide racine enracinement profil du sol écologie forestière ferralsol aérosol saison sèche sécheresse http://aims.fao.org/aos/agrovoc/c_7976 http://aims.fao.org/aos/agrovoc/c_6651 http://aims.fao.org/aos/agrovoc/c_6649 http://aims.fao.org/aos/agrovoc/c_14402 http://aims.fao.org/aos/agrovoc/c_3044 http://aims.fao.org/aos/agrovoc/c_2858 http://aims.fao.org/aos/agrovoc/c_158 http://aims.fao.org/aos/agrovoc/c_2400 http://aims.fao.org/aos/agrovoc/c_2391 http://aims.fao.org/aos/agrovoc/c_1432 Freycon, Vincent Wonkam, Christelle Joëlle Fayolle, Adeline Laclau, Jean-Paul Lucot, Eric Jourdan, Christophe Cornu, Guillaume Gourlet-Fleury, Sylvie Tree roots can penetrate deeply in African semi-deciduous rain forests: evidence from two common soil types |
description |
Despite the important functional role of deep roots in withdrawing water during drought, direct measurements of root distribution are very rare in tropical rain forests. The aim of this study was to investigate the root distribution of Entandrophragma cylindricum, a common tree species in the Central African semi-deciduous rain forest, in Ferralsols and Arenosols. We dug two pits to a depth of 6 m in Ferralsols and two pits to a depth of 3 m in Arenosols, close to E. cylindricum trees. The vertical soil profiles were divided into 10 × 10-cm grid cells and the roots counted were distributed in three diameter classes. We fitted a root distribution model to our dataset. We found that vertical root distribution was shallower in Arenosols than in Ferralsols. Root penetration was not stopped even by a Ferralsol with high gravel content in its subsoil. Overall, our measurements showed that 95% of all roots were distributed to depths of between 258 and 564 cm from the soil surface, which is much deeper than the 95 cm depth previously reported in the literature for tropical rain forests. As sampling depth could explain this discrepancy, we recommend a sampling depth of at least 3¿5 m to accurately estimate root distribution. The drier the dry season, the deeper the sampling depth should be. Our results are consistent with global models of root distribution in forest ecosystems, which are driven by climate variables. We thus suggest that deep rooting could be common in rain forests with a marked dry season. |
format |
article |
topic_facet |
K01 - Foresterie - Considérations générales F62 - Physiologie végétale - Croissance et développement P33 - Chimie et physique du sol forêt tropicale humide racine enracinement profil du sol écologie forestière ferralsol aérosol saison sèche sécheresse http://aims.fao.org/aos/agrovoc/c_7976 http://aims.fao.org/aos/agrovoc/c_6651 http://aims.fao.org/aos/agrovoc/c_6649 http://aims.fao.org/aos/agrovoc/c_14402 http://aims.fao.org/aos/agrovoc/c_3044 http://aims.fao.org/aos/agrovoc/c_2858 http://aims.fao.org/aos/agrovoc/c_158 http://aims.fao.org/aos/agrovoc/c_2400 http://aims.fao.org/aos/agrovoc/c_2391 http://aims.fao.org/aos/agrovoc/c_1432 |
author |
Freycon, Vincent Wonkam, Christelle Joëlle Fayolle, Adeline Laclau, Jean-Paul Lucot, Eric Jourdan, Christophe Cornu, Guillaume Gourlet-Fleury, Sylvie |
author_facet |
Freycon, Vincent Wonkam, Christelle Joëlle Fayolle, Adeline Laclau, Jean-Paul Lucot, Eric Jourdan, Christophe Cornu, Guillaume Gourlet-Fleury, Sylvie |
author_sort |
Freycon, Vincent |
title |
Tree roots can penetrate deeply in African semi-deciduous rain forests: evidence from two common soil types |
title_short |
Tree roots can penetrate deeply in African semi-deciduous rain forests: evidence from two common soil types |
title_full |
Tree roots can penetrate deeply in African semi-deciduous rain forests: evidence from two common soil types |
title_fullStr |
Tree roots can penetrate deeply in African semi-deciduous rain forests: evidence from two common soil types |
title_full_unstemmed |
Tree roots can penetrate deeply in African semi-deciduous rain forests: evidence from two common soil types |
title_sort |
tree roots can penetrate deeply in african semi-deciduous rain forests: evidence from two common soil types |
url |
http://agritrop.cirad.fr/574569/ http://agritrop.cirad.fr/574569/1/document_574569.pdf |
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