干旱区生态环境知识资源中心(Arid): Aboveground tree carbon stocks in West African semi-arid ecosystems: Dominance patterns, size class allocation and structural drivers

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DOI	10.1016/j.gecco.2020.e01331
	Aboveground tree carbon stocks in West African semi-arid ecosystems: Dominance patterns, size class allocation and structural drivers
	Mensah, Sylvanus; Noulekoun, Florent; Ago, Expedit E.
通讯作者	Mensah, S (corresponding author), Univ Abomey Calavi, Lab Biomath & Estimat Forestieres, Cotonou, Benin.
来源期刊	GLOBAL ECOLOGY AND CONSERVATION
ISSN	2351-9894
出版年	2020
卷号	24
英文摘要	The importance of terrestrial ecosystems for carbon sequestration and climate regulation is acknowledged globally. However, the underlying structural drivers are still not well understood, particularly across distinct tropical forest ecosystems where trees species have different growth habits and potential to reach different maximal size. In particular, how important are different tree size classes in contributing to stand aboveground carbon (AGC) remains unclear across forest ecosystems. Here, we hypothesized that (i) tree size classes would contribute differently to stand AGC across forest ecosystems; and (ii) few species, possibly dominant, would determine most of stand AGC. We tested these hypotheses using a 17-ha sampled inventory data from gallery forests, woodlands and savannahs in the Republic of Benin. We examined (i) how AGC stocks vary among small(<20 cm), medium- (20-40 cm) and large-size (>40 cm diameter at breast height - dbh) trees; (ii) how the large size class and its individual species contribute to AGC; and (iii) how size class-based taxonomic and structural variables influence AGC? Stand AGC was 23 +/- 5, 30 +/- 8 and 42 +/- 12 MgC ha(-1) in savannah, woodland and gallery forest, respectively. There were significant main and interaction effects of vegetation types and size classes. As expected, medium and large-size classes contained more of the AGC, irrespective of the vegetation type. However, gallery forests had the lowest AGC in the <20 cm dbh class, but higher values in medium- and large-size classes as compared to woodlands and savannahs. The top 10 species contributed 82%, 89% and 91% of AGC in gallery forests, woodlands and savannahs, respectively. In addition, five of the top 10 dominant species were shared by the three vegetation types and alone contributed 70-76% of AGC. Tree basal area was the most constant structural attribute influencing AGC; however, its influence shifted with vegetation type and size class, with greater effects of large-size tree basal area in gallery forests, and of medium trees and small trees' basal area in woodlands and savannahs, respectively. The study shows that (i) AGC allocation to size class varied across vegetation types, and (ii) small and medium trees are also important in predicting AGC, especially in semi-arid environments dominated by high densities of small-size trees (e.g. woodlands and savannahs). It also highlights the importance of few dominant species in contributing a large proportion of AGC stocks. The conservation of these dominant species is essential to avoid substantial decline of AGC stock. (C) 2020 The Authors. Published by Elsevier B.V.
英文关键词	Benin Tree biomass Dominant species Large-size trees Savannah Stand structure
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000608479300021
WOS关键词	TROPICAL FORESTS ; VEGETATION TYPES ; DIVERSITY ; BIOMASS ; STORAGE ; COMPLEMENTARITY ; BENIN
WOS类目	Biodiversity Conservation ; Ecology
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/369199
作者单位	[Mensah, Sylvanus] Univ Abomey Calavi, Lab Biomath & Estimat Forestieres, Cotonou, Benin; [Noulekoun, Florent] Korea Univ, Dept Environm Sci & Ecol Engn, 145 Anamro, Seoul 02841, South Korea; [Ago, Expedit E.] Univ Abomey Calavi, Lab Ecol Appl, Cotonou, Benin; [Ago, Expedit E.] Univ Liege, Biodivers & Paysage, Gembloux Agro Bio Tech, 27 Ave Marechal Juin, B-5030 Gembloux, Belgium
推荐引用方式 GB/T 7714	Mensah, Sylvanus,Noulekoun, Florent,Ago, Expedit E.. Aboveground tree carbon stocks in West African semi-arid ecosystems: Dominance patterns, size class allocation and structural drivers[J],2020,24.
APA	Mensah, Sylvanus,Noulekoun, Florent,&Ago, Expedit E..(2020).Aboveground tree carbon stocks in West African semi-arid ecosystems: Dominance patterns, size class allocation and structural drivers.GLOBAL ECOLOGY AND CONSERVATION,24.
MLA	Mensah, Sylvanus,et al."Aboveground tree carbon stocks in West African semi-arid ecosystems: Dominance patterns, size class allocation and structural drivers".GLOBAL ECOLOGY AND CONSERVATION 24(2020).