干旱区生态环境知识资源中心(Arid): Growth ring formation of Dichrostachys cinerea and Senegalia mellifera in arid environments in Namibia

Arid

DOI	10.1016/j.dendro.2019.125661
	Growth ring formation of Dichrostachys cinerea and Senegalia mellifera in arid environments in Namibia
	Shikangalah, R.1; Mapani, B.2; Mapaure, I 3; Herzschuh, U.4; Musimba, A.3; Tabares, X.4
通讯作者	Shikangalah, R.
来源期刊	DENDROCHRONOLOGIA
ISSN	1125-7865
EISSN	1612-0051
出版年	2020
卷号	59
英文摘要	Dichrostachys cinerea and Senegalia mellifera trees are the most widespread invasive encroacher species in Namibia. Understanding their growth performance under arid conditions is key to understanding and managing the arid ecosystems of Namibia. To determine their utility in dendrochronology, we analyzed the formation of growth rings for two species from three sites in Namibia. We applied cross-dating techniques to 69 tree discs, the analysis of which confirmed the formation of annual growth rings. The rings are characterised by alternating layers of low and high vessel density and are separated by bands of marginal parenchyma. D. cinerea shows a well-defined pattern of growth rings, whereas the ring patterns of S. mellifera are more complex. Because aging trees tend to display narrower rings toward the outside of the stem, we applied both ring-width index and basal area increment methods in developing ring-width chronologies for the two species. Descriptive statistics for the chronologies indicate that the average ring chronologies are of good quality and that the trees are responding to common environmental signals. The basal area increment methodology produced better statistics than the ring-width index for these two species. Furthermore, statistical characteristics of the chronologies indicate that D. cinerea has a higher mean sensitivity (MS), expressed population signal (EPS), and signal-to-noise ratio (SNR) than S. mellifera. Thus, we find that both species are suitable for dendrochronological study, with D. cinerea being better than S. mellifera.
英文关键词	Dichrostachys cinerea Senegalia mellifera Dendrochronology Growth ring Ring chronology Namibia
类型	Article
语种	英语
国家	Namibia ; Germany
收录类别	SCI-E
WOS记录号	WOS:000510466700004
WOS关键词	TREE-RING ; AGE-DETERMINATION ; CLIMATIC SIGNALS ; TROPICAL TREES ; DENDROCLIMATOLOGY ; PRECIPITATION ; GRADIENT ; DECLINE ; WIDTH
WOS类目	Forestry ; Geography, Physical
WOS研究方向	Forestry ; Physical Geography
EI主题词	2020-02-01
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/312795
作者单位	1.Univ Namibia, Fac Humanities & Social Sci, Dept Geog, Private Bag 13301, Windhoek, Namibia; 2.Univ Namibia, Fac Sci, Dept Geol, Private Bag 13301, Windhoek, Namibia; 3.Univ Namibia, Fac Sci, Dept Biol Sci, Private Bag 13301, Windhoek, Namibia; 4.Alfred Wegner Inst Polar Res, Potsdam, Germany
推荐引用方式 GB/T 7714	Shikangalah, R.,Mapani, B.,Mapaure, I,et al. Growth ring formation of Dichrostachys cinerea and Senegalia mellifera in arid environments in Namibia[J],2020,59.
APA	Shikangalah, R.,Mapani, B.,Mapaure, I,Herzschuh, U.,Musimba, A.,&Tabares, X..(2020).Growth ring formation of Dichrostachys cinerea and Senegalia mellifera in arid environments in Namibia.DENDROCHRONOLOGIA,59.
MLA	Shikangalah, R.,et al."Growth ring formation of Dichrostachys cinerea and Senegalia mellifera in arid environments in Namibia".DENDROCHRONOLOGIA 59(2020).