气候变化领域集成服务门户(CCPortal): Above-ground carbon stocks and timber value of old timber plantations, secondary and primary forests in southern Ghana

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DOI	10.1016/j.foreco.2020.118236
	Above-ground carbon stocks and timber value of old timber plantations, secondary and primary forests in southern Ghana
	Brown H.C.A.; Berninger F.A.; Larjavaara M.; Appiah M.
发表日期	2020
ISSN	0378-1127
卷号	472
英文摘要	High deforestation rates, especially in the tropics, currently result in the annual emission of large amounts of carbon, contributing to global climate change. There is therefore an urgent need to take actions to mitigate climate change both by slowing down deforestation and by initiating new sinks. Tropical forest plantations are generally thought to sequester carbon rapidly during the initial years but there is limited knowledge on their long-term potential. In this study, we assessed the carbon sequestration in old (42–47 years) timber plantations of Aucoumea klaineana, Cedrela odorata, Tarrietia utilis, and Terminalia ivorensis, and secondary forests of similar ages, by comparing their basal areas and above-ground carbon stocks (AGC) to that of nearby primary forests. Additionally, we estimated and compared timber volume and stumpage value in the three forest types. Systematic random sampling of ninety-three 20 m × 20 m plots in eleven forest sites (2 secondary forests, 2 primary forests, and 7 timber plantations) was undertaken to determine the effect of forest type on AGC, basal area, timber volume, and stumpage value. After 42 years of growth, mean AGC of the timber plantations (159.7 ± 14.3 Mg ha−1) was similar to that of primary forests (173.0 ± 25.1 Mg ha−1) and both were significantly higher than the mean AGC of the secondary forests (103.6 ± 12.3 Mg ha−1). Mean basal area and timber volume of the timber plantations and secondary forests were similar to that of the primary forests, though in each case the timber plantations had significantly higher values compared to the secondary forests. Mean timber value of the plantations ($8577 ha−1) was significantly higher than both secondary ($1870 ha−1) and primary forests ($3112 ha−1). Contrary to our expectations, naturally regenerated trees (woody recruits) within the timber plantations had similar AGC levels, basal area, timber volume, and value compared to the secondary forests. Long-rotation tropical forest plantations under low-intensity management could achieve higher AGC levels and thus have higher climate change mitigation potential and timber values compared to naturally regenerated secondary forests, and are able to reach values similar to primary forests. Monoculture timber plantations could facilitate the successful colonization of their understoreys by native woody recruits that contribute considerably to stand AGC and timber values. Long-rotation forest plantations in the tropics therefore have a critical role to play in forest rehabilitation and climate change mitigation while having the potential to provide modest financial returns to landowners through selective harvesting of timber and/or payments for carbon sequestration. © 2020 The Authors
英文关键词	Above-ground biomass; Above-ground carbon stocks; Climate change mitigation; Primary forest; Reforestation; Secondary forest; Timber plantations; Timber stumpage value; Woody recruits
语种	英语
scopus关键词	Carbon; Climate change; Deforestation; Timber; Tropics; Above-ground carbons; Carbon sequestration; Climate change mitigation; Financial returns; Forest rehabilitation; Global climate changes; Long-term potential; Selective harvesting; Reforestation; aboveground biomass; basal area; carbon cycle; carbon emission; carbon sequestration; colonization; deforestation; plantation forestry; secondary forest; timber; timber harvesting; understory; Averages; Carbon; Deforestation; Forests; Plantations; Reforestation; Tropics; Volume; Ghana; Cedrela odorata; Terminalia ivorensis
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/155202
作者单位	University of Helsinki, Department of Forest Science, Helsinki, 00790, Finland; Forestry Commission, Ghana, P.O. Box MB 434, Accra, Ghana; University of Eastern Finland, Department of Environmental and Biological Sciences, PL 111, Joensuu, 80101, Finland; Institute of Ecology and Key Laboratory for Earth Surface Processes of the Ministry of Education, College of Urban and Environmental Sciences, Peking University, Beijing, 100871, China; CSIR – Forestry Research Institute of Ghana, P.O. Box UP 63, Kumasi, Ghana; CSIR – College of Science and Technology, Cantonments, Accra, Ghana
推荐引用方式 GB/T 7714	Brown H.C.A.,Berninger F.A.,Larjavaara M.,et al. Above-ground carbon stocks and timber value of old timber plantations, secondary and primary forests in southern Ghana[J],2020,472.
APA	Brown H.C.A.,Berninger F.A.,Larjavaara M.,&Appiah M..(2020).Above-ground carbon stocks and timber value of old timber plantations, secondary and primary forests in southern Ghana.Forest Ecology and Management,472.
MLA	Brown H.C.A.,et al."Above-ground carbon stocks and timber value of old timber plantations, secondary and primary forests in southern Ghana".Forest Ecology and Management 472(2020).