Dispositif de Nelder; Afrormosia; densité; génétique; accroissement; modélisation; forêt; Afrique
Abstract :
[en] Description of the subject. Pericopsis elata (Fabaceae) is a long-lived light-demanding tree from African rain forests that produces timber of high economic value. Natural populations suffer from overexploitation and a deficit of natural regeneration. Plantations could increase its production and limit the pressure on natural forests. However, we lack knowledge on the influence of spacing and seed tree origin on tree growth to optimize plantation protocols.
Objectives. This study evaluated the impact of sapling density and seed tree origin on the growth in diameter and height of P. elata plants, 20 months after plantation.
Method. Seeds were collected on 19 mother trees in a 400 ha natural stand near Kisangani (DRC). In October 2017, seedlings were transplanted in a Nelder design plantation with three replicates, to compare sapling growth at 10 contrasting plant densities under full sun. Diameter and height increments of 540 plants were analyzed according to local competition and maternal origin using generalized additive models.
Results. Twenty months after planting, height growth peaked at an intermediate density of 47,000 stems·ha-1 (165.6 ± 39.2 cm·year-1), while diameter growth peaked at a lower density of 4,200 stems·ha-1 (24.6 ± 8.3 mm·year-1). The maternal origin of saplings affected their growth, the coefficients of variation among mother trees reaching 7.6% and 6.4% for diameter and height increments, respectively. The initial diameter affected positively diameter growth while the initial height did not influence height growth.
Conclusions. The Nelder design proved useful to assess how plant growth depends both on spacing and genetic factors.
Ligot, Gauthier ; Université de Liège - ULiège > Département GxABT > Laboratoire de Foresterie des régions trop. et subtropicales
Assumani, Dieu-Merci
Ndjele, Léopold
Bourland, Nils
Language :
English
Title :
Influence of spacing and seed trees on the growth of Pericopsis elata saplings during the first twenty months of a planting trial
Alternative titles :
[fr] Influence de l’écartement et du semencier sur la croissance des plants de pericopsis elata durant les vingt premiers mois d’un essai de plantation
Publication date :
05 February 2021
Journal title :
Biotechnologie, Agronomie, Société et Environnement
ISSN :
1370-6233
eISSN :
1780-4507
Publisher :
Presses Agronomiques de Gembloux, Gembloux, Belgium
Addo-Danso S. et al., 2012. Survival and growth of Nauclea diderrichii and Pericopsis elata in monoculture and mixed-species plots in Ghana. J. Trop. Ecol., 24(1), 37-45.
Beckage B. & Clark J.S., 2003. Seedling survival and growth of three forest tree species: the role of spacial heterogeneity. Ecology, 84(7), 1849-1861, doi. org/10.1890/0012-9658(2003)084[1849:SSAGOT]2.0. CO;2
Bourbier L. et al., 2013. Large-scale estimation of forest canopy opening using remote sensing in Central Africa. Bois For. Trop., 315(1), 3-9.
Bourland N. et al., 2012a. Ecology of Pericopsis elata (Fabaceae), an endangered timber species in Southeastern Cameroon. Biotropica, 44(6), 840-847, doi.org/10.1111/j.1744-7429.2012.00874.x
Bourland N. et al., 2012b. Ecology and management of Pericopsis elata (Harms) Meeuwen (Fabaceae) populations: a review. Biotechnol. Agron. Soc. Environ, 16(4), 486-498.
Brunner A. & Nigh G., 2000. Light absorption and bole volume growth of individual douglas-fir trees. Tree Physiol., 20(5-6), 323-332, doi.org/10.1093/treephys/20.5-6.323
Colombaroli D. et al., 2016. Stable carbon and oxygen isotopes in tree rings show physiological responses of Pericopsis elata to precipitation in the Congo Basin. J. Trop. Ecol., 32(3), 213-225, doi.org/10.1017/S0266467416000134
De Ridder M. et al., 2014. Dendrochronological potential in a semi-deciduous rainforest: the case of Pericopsis elata in Central Africa. Forests, 5(12), 3087-3106, doi. org/10.3390/f5123087
Doucet J.L. et al., 2016. Enrichment of Central African logged forests with high-value tree species: testing a new approach to regenerating degraded forests. Int. J. Biodivers. Sci. Ecosyst. Serv. Manage., 12(1), 83-95, doi.org/10.1080/21513732.2016.1168868
Dudu A., 1991. Étude du peuplement d’insectivores et de rongeurs de la forêt ombrophile de basse altitude du Zaïre (Kisangani, Masako). Thèse de doctorat: Universiteit Antwerpen (Belgique).
Fayolle A. et al., 2015. Differential performance between two timber species in forest logging gaps and in plantations in Central Africa. Forests, 6(2), 380-394, doi.org/10.3390/f6020380
Fétéké F. et al., 2015. Modéliser la croissance de quatre essences pour améliorer la gestion forestière au Cameroun. Bois For. Trop., 325(3), 5-20, doi. org/10.19182/bft2015.325.a31269
Gond V. et al., 2013. Vegetation structure and greenness in Central Africa from Modis multi-temporal data. Phil. Trans. R. Soc., 368(1625), 1-8, doi.org/10.1098/rstb.2012.0309
Gourlet-Fleury S., 1998. Indices de compétition en forêt dense tropicale humide: étude de cas sur le dispositif sylvicole expérimental de Paracou (Guyane française). Ann. For. Sci., 55(6), 623-654, doi.org/10.1051/forest:19980601
Halpin C.R. & Lorimer C.G., 2017. A demographic approach to evaluating tree population sustainability. Forests, 8(46), 1-26, doi.org/10.3390/f8020046
Hedrick P.W., Hellsten U. & Grattapaglia D., 2015. Examining the cause of high inbreeding depression: analysis of whole-genome sequence data in 28 selfed progeny of Eucalyptus grandis. New Phytol., 209, 600-611, doi.org/10.1111/nph.13639
Hegyi F., 1974. A simulation model for managing Jack-pine stands. In: Fries J., ed. Growth models for tree and stand simulation. Research Note No. 30. Stockholm: Royal College of Forestry, Department of Forest Yield Research, 74-90.
Kearsley E. et al., 2017. Functional community structure of African monodominant Gilbertiodendron dewevrei forest influenced by local environmental filtering. Ecol. Evol., 7(1), 295-304, doi.org/10.1002/ece3.2589
Koskela J. et al., 2014. Utilization and transfer of forest genetic resources: a global review. For. Ecol. Manage., 333, 22-34, doi.org/10.1016/j.foreco.2014.07.017
Kuehne C., Kublin E., Pyttel P. & Bauhus J., 2013. Growth and form of Quercus robur and Fraxinus excelsior respond distinctly different to initial growing space: results from 24-year-old Nelder experiments. J. For. Res., 24(1), 1-14, doi.org/10.1007/s11676-013-0320-6
Lemoine B. & Sartolou A., 1980. Densité de peuplement, concurrence et coopération chez le pin maritime. Ann. Sci. For., 37(3), 217-237.
León N. et al., 2017. Expected genetic gain and genotype by environment interaction in almond (Dipteryx panamensis (Pittier) Rec. and Mell) in Costa Rica. Silvae Genet., 66(1), 9-13, doi.org/10.1515/sg-2017-0002
Ligot G. et al., 2019. Growth determinants of timber species Triplochiton scleroxylon and implications for forest management in Central Africa. For. Ecol. Manage., 437, 211-221, doi.org/10.1016/j.foreco.2019.01.042
Luechanimitchit P. et al., 2017. Genetic parameter estimates for growth, stem-form and branching traits of Casuarina junghuhniana clones grown in Thailand. For. Ecol. Manage., 404, 251-257, doi.org/10.1016/j. foreco.2017.08.030
Makana J.R. et al., 2011. Demography and biomass change in monodominant and mixed old-growth forest of the Congo. J. Trop. Ecol., 27(5), 447-461, doi.org/10.1017/S0266467411000265
Micheneau C. et al., 2011. Development and characterization of microsatellite loci in Pericopsis elata (Fabaceae) using a cost-efficient approach. Am. J. Bot., 98(10), e268–e270, doi.org/10.3732/ajb.1100070
Mosango M., 1983. Une estimation du niveau d’accumulation des diaspores dans les sols des groupements herbacés à Portulaca quadrifida L. et à Talinum triangulare (Jacq.) Willd. à Kisangani (Zaïre). Bull. Soc. R. Bot. Belg., 116(1), 55-61.
Nanson A., 2004. Génétique et amélioration des arbres forestiers. Gembloux, Belgique: Les Presses agronomiques de Gembloux.
Nelder J.A., 1962. New kinds of systematic devices for spacing experiments. Biometrics, 18(3), 283-307, doi: 10.2307/2527473
Ngueguim J.R. et al., 2010. Diversité floristique sous canopée en plantation forestière de Mangombe-Edea (Cameroun). Biotechnol. Agron. Soc. Environ., 14(1), 167-176.
Ngueguim J.R. et al., 2012. Growth and productivity of Pericopsis elata (Harms) Meeuwen in some forest plantations of Cameroon. For. Sci. Technol., 8(1), 1-10, doi.org/10.1080/21580103.2012.658234
Obiang N.L.E. et al., 2010. Spatial pattern of Central African rainforests can be predicted from average tree size. Oikos, 119(10), 1643-1653, doi.org/10.1111/j.1600-0706.2010.18440.x
Ouédraogo D.Y. et al., 2014. Enrichment of logging gaps with a high conservation value species (Pericopsis elata) in Central African moist forest. Forests, 5(12), 3031-3047, doi.org/10.3390/f5123031
Parrott D.L., Joshua S.B. & Lhotka J.M., 2012. Designing Nelder wheel plots for tree density experiments. New For., 43, 245-254, doi.org/10.1007/s11056-011-9278-4
Pérez R.M. et al., 2005. Logging in the Congo Basin: a multi-country characterization of timber companies. For. Ecol. Manage., 214, 221-236, doi.org/10.1016/j. foreco.2005.04.020
Petrokofsky G. et al., 2015. Comparative effectiveness of silvicultural interventions for increasing timber production and sustaining conservation values in natural tropical production forests. A systematic review protocol. Environ. Evidence, 4(8), 1-7, doi.org/10.1186/s13750-015-0034-7
R Core Team, 2018. A language and environment for statistical computing. Vienna: R Foundation for Statistical Computing.
Rio D.M., Schütze G. & Pretzsch H., 2014. Temporal variation of competition and facilitation in mixed species forests in Central Europe. Plant Biol., 16(1), 166-176, doi.org/10.1111/plb.12029
Sawitri et al., 2020. Potential of genome-wide association studies and genomic selection to improve productivity and quality of commercial timber species in tropical rainforest, a case study of Shorea platyclados. Forests, 11(2), 239, doi.org/10.3390/f11020239
Sotelo C., Hernández R.E., Beaulieu J. & Weber J.C., 2008. Genetic variation in wood color and its correlations with tree growth and wood density of Calycophyllum spruceanum at an early age in the Peruvian Amazon. New For., 35(1), 57-73, doi.org/10.1007/s11056-007-9060-9
Tieguhong J.C. et al., 2017. Beyond timber: balancing demands for tree resources between concessionaires and villagers. Int. For. Rev., 19(S2), 1-14, doi. org/10.1505/146554817822295966
Toledo M. et al., 2011. Climate is a stronger driver of tree and forest growth rates than soil and disturbance. J. Ecol., 99(1), 254-264, doi.org/10.1111/j.1365-2745.2010.01741.x
Uhl E. et al., 2015. Analysing the effect of stand density and site conditions on structure and growth of oak species using Nelder trials along an environmental gradient: experimental device, evaluation methods, and results. For. Ecosyst., 2(17), 1-19, doi.org/10.1186/s40663-015-0041-8
Vanclay J.K., Lamb D., Erskine P.D. & Cameron D.M., 2013. Spatially explicit competition in a mixed planting of Araucaria cunninghamii and Flindersia brayleyana. Ann. For. Sci., 70, 611-619, doi.org/10.1007/s13595-013-0304-x
Vlam M. et al., 2014. Understanding recruitment failure in tropical tree species: insights from a tree-ring study. For. Ecol. Manage., 312, 108-116, doi.org/10.1016/j. foreco.2013.10.016
Wood S.N., 2011. Fast stable restricted maximum likelihood and marginal likelihood estimation of semiparametric generalized linear models. J. R. Stat. Soc., 73(1), 3-36, doi.org/10.1111/j.1467-9868.2010.00749.x
Zuur A.F. et al., 2009. Mixed effects models and extensions in ecology with R. New York, USA: Springer, doi: 10.1007/978-0-387-87458-6
