Reduced density due to logging and its consequences on mating system and pollen flow in the African mahogany Entandrophragma cylindricum
In tropical forests, selective logging removes large trees that are often the main contributors to pollination. We studied pollination patterns of the African mahogany, Entandrophragma cylindricum (Sapelli). We investigated two plots in Cameroon corresponding to three tree densities: unlogged forest (Ndama 2002), a mildly logged forest 1 year after logging (Ndama 2003) and a severely logged forest 30 years after logging (Dimako). We used four microsatellite markers to perform paternity analysis. Selfing remained below 2% in all treatments. Pollen flow was mainly long distance but with some proximity effects. Average observed within-plot pollination distances were 338, 266 and 385 m, and pollination by trees outside the plots was 70% (Ndama 2002), 74% (Ndama 2003) and 66% (Dimako). Despite sampling a limited number of seeds from a limited number of mother trees, we obtained seeds sired by 35.6-38.3% of the potential within-plot pollen donors. While trees 20cm in diameter contributed to pollination, results in Dimako suggest that individual larger trees contribute more to pollination than small ones. This effect was not detected in the other treatments. The results suggest extensive pollen flow in Sapelli. Hence, in Sapelli, the main limiting factor for regeneration after logging may be a reduction in the number of trees capable of producing seeds rather genetic effects due to limits to pollen dispersal.
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Subjects: | F63 - Physiologie végétale - Reproduction, F40 - Écologie végétale, K10 - Production forestière, Entandrophragma, forêt tropicale, http://aims.fao.org/aos/agrovoc/c_2579, http://aims.fao.org/aos/agrovoc/c_24904, http://aims.fao.org/aos/agrovoc/c_1229, |
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dig-cirad-fr-5423492023-06-26T12:01:42Z http://agritrop.cirad.fr/542349/ http://agritrop.cirad.fr/542349/ Reduced density due to logging and its consequences on mating system and pollen flow in the African mahogany Entandrophragma cylindricum. Lourmas Mathieu, Kjellberg Finn, Dessard Hélène, Joly Hélène, Chevallier Marie-Hélène. 2007. Heredity, 99 (2) : 151-160.https://doi.org/10.1038/sj.hdy.6800976 <https://doi.org/10.1038/sj.hdy.6800976> Researchers Reduced density due to logging and its consequences on mating system and pollen flow in the African mahogany Entandrophragma cylindricum Lourmas, Mathieu Kjellberg, Finn Dessard, Hélène Joly, Hélène Chevallier, Marie-Hélène eng 2007 Heredity F63 - Physiologie végétale - Reproduction F40 - Écologie végétale K10 - Production forestière Entandrophragma forêt tropicale http://aims.fao.org/aos/agrovoc/c_2579 http://aims.fao.org/aos/agrovoc/c_24904 Cameroun http://aims.fao.org/aos/agrovoc/c_1229 In tropical forests, selective logging removes large trees that are often the main contributors to pollination. We studied pollination patterns of the African mahogany, Entandrophragma cylindricum (Sapelli). We investigated two plots in Cameroon corresponding to three tree densities: unlogged forest (Ndama 2002), a mildly logged forest 1 year after logging (Ndama 2003) and a severely logged forest 30 years after logging (Dimako). We used four microsatellite markers to perform paternity analysis. Selfing remained below 2% in all treatments. Pollen flow was mainly long distance but with some proximity effects. Average observed within-plot pollination distances were 338, 266 and 385 m, and pollination by trees outside the plots was 70% (Ndama 2002), 74% (Ndama 2003) and 66% (Dimako). Despite sampling a limited number of seeds from a limited number of mother trees, we obtained seeds sired by 35.6-38.3% of the potential within-plot pollen donors. While trees 20cm in diameter contributed to pollination, results in Dimako suggest that individual larger trees contribute more to pollination than small ones. This effect was not detected in the other treatments. The results suggest extensive pollen flow in Sapelli. Hence, in Sapelli, the main limiting factor for regeneration after logging may be a reduction in the number of trees capable of producing seeds rather genetic effects due to limits to pollen dispersal. article info:eu-repo/semantics/article Journal Article info:eu-repo/semantics/publishedVersion http://agritrop.cirad.fr/542349/1/542349.pdf text Cirad license info:eu-repo/semantics/restrictedAccess https://agritrop.cirad.fr/mention_legale.html https://doi.org/10.1038/sj.hdy.6800976 10.1038/sj.hdy.6800976 http://catalogue-bibliotheques.cirad.fr/cgi-bin/koha/opac-detail.pl?biblionumber=193763 info:eu-repo/semantics/altIdentifier/doi/10.1038/sj.hdy.6800976 info:eu-repo/semantics/altIdentifier/purl/https://doi.org/10.1038/sj.hdy.6800976 |
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F63 - Physiologie végétale - Reproduction F40 - Écologie végétale K10 - Production forestière Entandrophragma forêt tropicale http://aims.fao.org/aos/agrovoc/c_2579 http://aims.fao.org/aos/agrovoc/c_24904 http://aims.fao.org/aos/agrovoc/c_1229 F63 - Physiologie végétale - Reproduction F40 - Écologie végétale K10 - Production forestière Entandrophragma forêt tropicale http://aims.fao.org/aos/agrovoc/c_2579 http://aims.fao.org/aos/agrovoc/c_24904 http://aims.fao.org/aos/agrovoc/c_1229 |
spellingShingle |
F63 - Physiologie végétale - Reproduction F40 - Écologie végétale K10 - Production forestière Entandrophragma forêt tropicale http://aims.fao.org/aos/agrovoc/c_2579 http://aims.fao.org/aos/agrovoc/c_24904 http://aims.fao.org/aos/agrovoc/c_1229 F63 - Physiologie végétale - Reproduction F40 - Écologie végétale K10 - Production forestière Entandrophragma forêt tropicale http://aims.fao.org/aos/agrovoc/c_2579 http://aims.fao.org/aos/agrovoc/c_24904 http://aims.fao.org/aos/agrovoc/c_1229 Lourmas, Mathieu Kjellberg, Finn Dessard, Hélène Joly, Hélène Chevallier, Marie-Hélène Reduced density due to logging and its consequences on mating system and pollen flow in the African mahogany Entandrophragma cylindricum |
description |
In tropical forests, selective logging removes large trees that are often the main contributors to pollination. We studied pollination patterns of the African mahogany, Entandrophragma cylindricum (Sapelli). We investigated two plots in Cameroon corresponding to three tree densities: unlogged forest (Ndama 2002), a mildly logged forest 1 year after logging (Ndama 2003) and a severely logged forest 30 years after logging (Dimako). We used four microsatellite markers to perform paternity analysis. Selfing remained below 2% in all treatments. Pollen flow was mainly long distance but with some proximity effects. Average observed within-plot pollination distances were 338, 266 and 385 m, and pollination by trees outside the plots was 70% (Ndama 2002), 74% (Ndama 2003) and 66% (Dimako). Despite sampling a limited number of seeds from a limited number of mother trees, we obtained seeds sired by 35.6-38.3% of the potential within-plot pollen donors. While trees 20cm in diameter contributed to pollination, results in Dimako suggest that individual larger trees contribute more to pollination than small ones. This effect was not detected in the other treatments. The results suggest extensive pollen flow in Sapelli. Hence, in Sapelli, the main limiting factor for regeneration after logging may be a reduction in the number of trees capable of producing seeds rather genetic effects due to limits to pollen dispersal. |
format |
article |
topic_facet |
F63 - Physiologie végétale - Reproduction F40 - Écologie végétale K10 - Production forestière Entandrophragma forêt tropicale http://aims.fao.org/aos/agrovoc/c_2579 http://aims.fao.org/aos/agrovoc/c_24904 http://aims.fao.org/aos/agrovoc/c_1229 |
author |
Lourmas, Mathieu Kjellberg, Finn Dessard, Hélène Joly, Hélène Chevallier, Marie-Hélène |
author_facet |
Lourmas, Mathieu Kjellberg, Finn Dessard, Hélène Joly, Hélène Chevallier, Marie-Hélène |
author_sort |
Lourmas, Mathieu |
title |
Reduced density due to logging and its consequences on mating system and pollen flow in the African mahogany Entandrophragma cylindricum |
title_short |
Reduced density due to logging and its consequences on mating system and pollen flow in the African mahogany Entandrophragma cylindricum |
title_full |
Reduced density due to logging and its consequences on mating system and pollen flow in the African mahogany Entandrophragma cylindricum |
title_fullStr |
Reduced density due to logging and its consequences on mating system and pollen flow in the African mahogany Entandrophragma cylindricum |
title_full_unstemmed |
Reduced density due to logging and its consequences on mating system and pollen flow in the African mahogany Entandrophragma cylindricum |
title_sort |
reduced density due to logging and its consequences on mating system and pollen flow in the african mahogany entandrophragma cylindricum |
url |
http://agritrop.cirad.fr/542349/ http://agritrop.cirad.fr/542349/1/542349.pdf |
work_keys_str_mv |
AT lourmasmathieu reduceddensityduetologginganditsconsequencesonmatingsystemandpollenflowintheafricanmahoganyentandrophragmacylindricum AT kjellbergfinn reduceddensityduetologginganditsconsequencesonmatingsystemandpollenflowintheafricanmahoganyentandrophragmacylindricum AT dessardhelene reduceddensityduetologginganditsconsequencesonmatingsystemandpollenflowintheafricanmahoganyentandrophragmacylindricum AT jolyhelene reduceddensityduetologginganditsconsequencesonmatingsystemandpollenflowintheafricanmahoganyentandrophragmacylindricum AT chevalliermariehelene reduceddensityduetologginganditsconsequencesonmatingsystemandpollenflowintheafricanmahoganyentandrophragmacylindricum |
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1770192453365661696 |