气候变化领域集成服务门户(CCPortal): Growth determinants of timber species Triplochiton scleroxylon and implications for forest management in central Africa

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DOI	10.1016/j.foreco.2019.01.042
	Growth determinants of timber species Triplochiton scleroxylon and implications for forest management in central Africa
	Ligot G.; Fayolle A.; Gourlet-Fleury S.; Dainou K.; Gillet J.-F.; De Ridder M.; Drouet T.; Groenendijk P.; Doucet J.-L.
发表日期	2019
ISSN	0378-1127
起始页码	211
结束页码	221
卷号	437
英文摘要	The sustainability of the polycyclic logging system in tropical forests has been increasingly questioned for a variety of reasons, and particularly in central Africa as commercial species, mostly light-demanding long-lived pioneer species, usually fail to recover a stable number of large trees after exploitation. Several factors are known to affect tropical tree demographic processes, like tree growth, survival and recruitment. Tree growth has particularly been showed to depend on ecological conditions, tree genetics, and competition with surrounding vegetation, as well as tree size or ontogeny. Yet, due to the paucity of available data, the importance of such factors is unclear and usually ignored when estimating future timber yields. To fill this gap, we chose to evaluate the variability in growth of one African long-lived pioneer and commercially very important species: Triplochiton scleroxylon K. Schum, gathering a broad dataset composed of tree ring data recorded in one site in Cameroon and periodic field inventory data recorded in seven sites across central Africa. In total, we analyzed 13,225 records of annual tree diameter increments recorded over 920 trees from seven sites in Cameroon, Republic of the Congo and Central African Republic. We evaluated (i) to what extent the average growth of trees that reach harvestable dimensions differs from population average and (ii) to what extent past perturbations influence the growth of remaining trees. We found the diameter growth of T. scleroxylon to be remarkably variable and this study provided an unprecedented quantification of the magnitude of some key growth determinants. In unlogged forests, the diameter increment of T. scleroxylon ranged between 0.40 cm year −1 in Southern Cameroon and 0.83 cm year −1 in South-Eastern Cameroon. The diameter increment was weakly related to tree size but increased twofold from unlogged to logged forests. Perturbation caused by logging stimulates growth of T. scleroxylon for at least 10–15 years. Finally, harvestable timber stock of large-sized T. scleroxylon was found to be constituted by trees that grew in average twice faster than trees of the entire extant population. As more and more inventory data become available, quantifying these effects could be replicated for other timber species and in other sites, to improve the accuracy of future timber resource estimates and improve forest management guidelines. © 2019 Elsevier B.V.
英文关键词	Ayous; Juvenile selection effect; Light-demanding species; Logging; Obeche; Persistent fast growth; Stock recovery rate; Tree-ring analysis
语种	英语
scopus关键词	Information management; Logging (forestry); Timber; Tropics; Ayous; Fast growths; Juvenile selection effect; Obeche; Recovery rate; Tree-ring analysis; Population statistics; commercial species; forest inventory; forest management; forest resource; growth; logging (timber); recruitment (population dynamics); survival; sustainability; tree ring; tropical forest; Cameroon; Central African Republic; Data; Diameter; Growth; Trees; Triplochiton; Tropics; Cameroon; Central African Republic; Congo; Triplochiton scleroxylon
来源期刊	Forest Ecology and Management
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/156145
作者单位	Université de Liège – Gembloux Agro-Bio Tech, Passage des Déportés 2, 5030 Gembloux, Belgium; UPR Forêts et Sociétés, CIRAD, Montpellier, France; Royal Museum for Central Africa, Leuvensesteenweg 13, 3080 Tervuren, Belgium; Université Libre de Bruxelles, Laboratoire d'Ecologie végétale et Biogéochimie (EvB), boulevard du Triomphe CP244Bruxelles 050, Belgium; Department of Plant Biology, Institute of Biology, University of Campinas – UNICAMP, P.O. Box 6109, 13083-970 CampinasSP, Brazil
推荐引用方式 GB/T 7714	Ligot G.,Fayolle A.,Gourlet-Fleury S.,et al. Growth determinants of timber species Triplochiton scleroxylon and implications for forest management in central Africa[J],2019,437.
APA	Ligot G..,Fayolle A..,Gourlet-Fleury S..,Dainou K..,Gillet J.-F..,...&Doucet J.-L..(2019).Growth determinants of timber species Triplochiton scleroxylon and implications for forest management in central Africa.Forest Ecology and Management,437.
MLA	Ligot G.,et al."Growth determinants of timber species Triplochiton scleroxylon and implications for forest management in central Africa".Forest Ecology and Management 437(2019).