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Biodiversity and carbon sequestration potential in two types of tropical rainforest, Cameroon
Acta Oecologica ( IF 1.8 ) Pub Date : 2020-04-21 , DOI: 10.1016/j.actao.2020.103562
Louis-Paul-Roger Kabelong Banoho , Louis Zapfack , Robert Bertrand Weladji , Cedric Chimi Djomo , Melanie Chichi Nyako , Julliete Mancho Nasang , Nadège Madountsap Tagnang , Roger Bruno Tabue Mbobda

Implementing Mechanisms for Reducing Emissions from Deforestation and Forest Degradation (REDD +) requires knowledge of the carbon storage potential in different forest types and different key reservoirs. We investigated the relationship between tree diversity and carbon stock in two forest types in Cameroon, an evergreen forest (EGF) in the South and a semi-deciduous forest (SDF) in the East. We aimed to characterize the two forest types, evaluate carbon stocks in five forest carbon reservoirs, and assess the relationship between the carbon stocks of the three pools (living carbon, dead carbon and soil carbon) studied and the diversity of the trees. An inventory of tree species with dbh ≥5 cm was made, covering 84 quadrats (25 m × 25 m), along 7 transects. Total woody biomass and dead wood were determined by allometric equations. We found that the EGF was more diverse in tree composition than the SDF. Absolute density and basal area were significantly higher in SDF than in EGF. There was a significant difference between living carbon of 327.35 t C.ha−1 in EGF and 369.77 t C.ha−1 in SDF. The contribution of dead wood in carbon storage varied on average from 8.40 t C.ha−1 in the EGF to 11.19 t C.ha−1 in the SDF. Similarly, trees of 5 cm ≤ dbh up to 10 cm dbh varied on average from 6.17 t C.ha−1 and 5.02 tC.ha−1 respectively for EGF and SDF. There was a positive but weak correlation between total carbon and tree species richness and a positive and moderate correlation between total carbon and biological types in both forest types. The results of this study highlight the need to take into account the assessment of carbon stocks of all reservoirs, and types of forests for a successful implementation of REDD + in the Congo Basin.



中文翻译:

两种热带雨林喀麦隆的生物多样性和碳固存潜力

减少森林砍伐和森林退化造成的排放的实施机制(REDD +)需要了解不同森林类型和不同主要储层的碳储存潜力。我们调查了喀麦隆的两种森林类型,南部的常绿森林(EGF)和东部的半落叶森林(SDF)的树木多样性与碳储量之间的关系。我们旨在表征这两种森林类型,评估五个森林碳库中的碳储量,并评估研究的三个库(生活碳,死碳和土壤碳)的碳储量与树木多样性之间的关系。沿7个样点对dbh≥5 cm的树木物种进行了清点,覆盖了84个样方(25 m×25 m)。木质总生物量和死木通过异速方程确定。我们发现,EGF的树组成比SDF更多样化。SDF中的绝对密度和基底面积显着高于EGF。活性炭之间的差异为327.35 t C.ha-1在EGF和369.77吨C.ha -1在SDF。死木在碳储存中的贡献平均从EGF的8.40 t C.ha -1到SDF的11.19 t C.ha -1。同样,EGF和SDF的5 cm≤dbh到10 cm dbh的树平均分别从6.17 t C.ha -1和5.02 tC.ha -1变化。在这两种森林类型中,总碳与树木物种丰富度之间存在正相关但弱相关,而总碳与生物类型之间存在正相关且中等相关。这项研究的结果突显了需要考虑所有储集层碳储量以及森林类型的评估,以便在刚果盆地成功实施REDD +。

更新日期:2020-04-21
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