Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1007/s00468-008-0221-z |
Climate-growth relationships of the dominant tree species from semi-arid savanna woodland in Ethiopia | |
Gebrekirstos, Aster1; Mitloehner, Ralph1; Teketay, Demel2; Worbes, Martin3 | |
通讯作者 | Gebrekirstos, Aster |
来源期刊 | TREES-STRUCTURE AND FUNCTION
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ISSN | 0931-1890 |
出版年 | 2008 |
卷号 | 22期号:5页码:631-641 |
英文摘要 | Long-term climate-growth relationships, were examined in tree rings of four co-occurring tree species from semi-arid Acacia savanna woodlands in Ethiopia. The main purpose of the study was to prove the presence of annual tree rings, evaluate the relationship between radial growth and climate parameters, and evaluate the association of El Nino and drought years in Ethiopia. The results showed that all species studied form distinct growth boundaries, though differences in distinctiveness were revealed among the species. Tree rings of the evergreen Balanites aegyptiaca were separated by vessels surrounding a thin parenchyma band and the growth boundary of the deciduous acacias was characterized by thin parenchyma bands. The mean annual diameter increment ranged from 3.6 to 5.0 mm. Acacia senegal and Acacia seyal showed more enhanced growth than Acacia tortilis and B. aegyptiaca. High positive correlations were found between the tree-ring width chronologies and precipitation data, and all species showed similar response to external climate forcing, which supports the formation of one tree-ring per year. Strong declines in tree-ring width correlated remarkably well with past El Nino Southern Oscillation (ENSO) events and drought/famine periods in Ethiopia. Spectral analysis of the master tree-ring chronology indicated occurrences of periodic drought events, which fall within the spectral peak equivalent to 2-8 years. Our results proved the strong linkage between tree-ring chronologies and climate, which sheds light on the potential of dendrochronological studies developing in Ethiopia. The outcome of this study has important implications for paleoclimatic reconstructions and in restoration of degraded lands. |
英文关键词 | tree-ring width Acacia species Balanities aegyptiaca climate change dendrochronology |
类型 | Article |
语种 | 英语 |
国家 | Germany ; Ghana |
收录类别 | SCI-E |
WOS记录号 | WOS:000259258900004 |
WOS关键词 | PTEROCARPUS-ANGOLENSIS ; TROPICAL TREES ; RIFT-VALLEY ; EL-NINO ; RINGS ; FOREST ; ACACIA ; FAMINE ; VARIABILITY ; PERIODICITY |
WOS类目 | Forestry |
WOS研究方向 | Forestry |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/159319 |
作者单位 | 1.Univ Gottingen, Sect Trop Silviculture 2, Inst Silviculture, D-37077 Gottingen, Germany; 2.African Reg Off, Forest Stewardship Council, Kumasi, Ghana; 3.Univ Gottingen, Inst Agron Trop, D-37077 Gottingen, Germany |
推荐引用方式 GB/T 7714 | Gebrekirstos, Aster,Mitloehner, Ralph,Teketay, Demel,et al. Climate-growth relationships of the dominant tree species from semi-arid savanna woodland in Ethiopia[J],2008,22(5):631-641. |
APA | Gebrekirstos, Aster,Mitloehner, Ralph,Teketay, Demel,&Worbes, Martin.(2008).Climate-growth relationships of the dominant tree species from semi-arid savanna woodland in Ethiopia.TREES-STRUCTURE AND FUNCTION,22(5),631-641. |
MLA | Gebrekirstos, Aster,et al."Climate-growth relationships of the dominant tree species from semi-arid savanna woodland in Ethiopia".TREES-STRUCTURE AND FUNCTION 22.5(2008):631-641. |
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