干旱区生态环境知识资源中心(Arid): Life-span growth dynamics and xylem anatomical patterns of diffuse-porous Afzelia africana Sm. (Fabaceae) in different ecological zones in Burkina Faso

Arid

DOI	10.1016/j.dendro.2020.125752
	Life-span growth dynamics and xylem anatomical patterns of diffuse-porous Afzelia africana Sm. (Fabaceae) in different ecological zones in Burkina Faso
	Balima, Larba Hubert; Gebrekirstos, Aster; Kouame, Francois N'Guessan; Nacoulma, Blandine Marie Ivette; Thiombiano, Adjima; Braeuning, Achim
通讯作者	Balima, LH (corresponding author), Univ Felix Houphouet Boigny, WASCAL Grad Res Program Climate Change & Biodiver, BP 165, Abidjan 31, Cote Ivoire.
来源期刊	DENDROCHRONOLOGIA
ISSN	1125-7865
EISSN	1612-0051
出版年	2020
卷号	64
英文摘要	Tropical West African savannas are exposed to high climatic variability with potential impacts on tree growth, forest dynamics and ecosystem productivity. In such context, understanding the long-term ecological responses of savanna trees to changing environmental conditions is of great relevance for taking appropriate conservation actions. We conducted the first study on tree-ring analysis and quantitative wood anatomy on Afzelia africana Sm. in Burkina Faso, to investigate the life-span growth trajectories and wood anatomical adjustment to site and to climate variations. A total of 24 stem discs was collected in four protected forests along the Sudano-sahelian and the Sudanian climatic zones. Wood samples were analyzed using standard dendrochronological methods and quantitative wood anatomy. The mean annual growth rates varied from 1.002 (+/- 0.249) mm. year-1 in the Sudanian zone to 1.128 (+/- 0.436) mm. year-1 in the Sudano-sahelian zone. Analysis of growth trajectories showed high variations within sites and between climatic zones. Wood anatomical traits significantly varied between sites. Principal Component Analysis revealed strong relationships between ring width, wood density and vessel traits, with 82.81 % of the total variance explained. Vessel size significantly increased from the pith to the bark, highlighting the ontogenetic effects on xylem anatomical variations. Inverse relationships were found between vessel size and vessel density across the driest site and the wettest site, suggesting that the higher the rainfall, the taller the tree, the larger vessel size, but the lower vessel density. By contrast, more arid conditions and high evapotranspiration lead to smaller vessel sizes and higher vessel density. Such anatomical adjustments highlight the trade-offs between water conductance efficiency and hydraulic safety, and emphasize physiological responses to climate variability. These variations on the long-term dynamics and xylem anatomical patterns underline complex interactions between ontogenetic effects and contrasting environmental factors that affect the eco-physiological functioning of A. africana throughout the Sudanian region.
英文关键词	Afzelia africana Growth trajectory Wood anatomy Vessel adjustment Tropical dendroecology Sudanian savannas
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000596530500002
WOS关键词	CLIMATE-CHANGE MITIGATION ; BEECH FAGUS-ORIENTALIS ; TREE-RING ANALYSIS ; TROPICAL FOREST ; PTEROCARPUS-ANGOLENSIS ; CARBON-DIOXIDE ; WEST-AFRICA ; DEFORESTATION ; PRECIPITATION ; DENDROCHRONOLOGY
WOS类目	Forestry ; Geography, Physical
WOS研究方向	Forestry ; Physical Geography
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/369211
作者单位	[Balima, Larba Hubert; Kouame, Francois N'Guessan] Univ Felix Houphouet Boigny, WASCAL Grad Res Program Climate Change & Biodiver, BP 165, Abidjan 31, Cote Ivoire; [Balima, Larba Hubert; Nacoulma, Blandine Marie Ivette; Thiombiano, Adjima] Univ Joseph KI ZERBO, Lab Plant Biol & Ecol, 03 BP 7021, Ouagadougou 03, Burkina Faso; [Gebrekirstos, Aster] World Agroforestry Ctr, Nairobi 30677, Kenya; [Gebrekirstos, Aster; Braeuning, Achim] Friedrich Alexander Univ Erlangen Nurnberg FAU, Inst Geog, D-91058 Erlangen, Germany
推荐引用方式 GB/T 7714	Balima, Larba Hubert,Gebrekirstos, Aster,Kouame, Francois N'Guessan,et al. Life-span growth dynamics and xylem anatomical patterns of diffuse-porous Afzelia africana Sm. (Fabaceae) in different ecological zones in Burkina Faso[J],2020,64.
APA	Balima, Larba Hubert,Gebrekirstos, Aster,Kouame, Francois N'Guessan,Nacoulma, Blandine Marie Ivette,Thiombiano, Adjima,&Braeuning, Achim.(2020).Life-span growth dynamics and xylem anatomical patterns of diffuse-porous Afzelia africana Sm. (Fabaceae) in different ecological zones in Burkina Faso.DENDROCHRONOLOGIA,64.
MLA	Balima, Larba Hubert,et al."Life-span growth dynamics and xylem anatomical patterns of diffuse-porous Afzelia africana Sm. (Fabaceae) in different ecological zones in Burkina Faso".DENDROCHRONOLOGIA 64(2020).