Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1111/j.1654-1103.2006.tb02468.x |
Long-term mortality patterns of the deep-rooted Acacia erioloba: The middle class shall die! | |
Moustakas, Aristides; Guenther, Matthias; Wiegand, Kerstin; Mueller, Karl-Heinz; Ward, David; Meyer, Katrin M.; Jeltsch, Florian | |
通讯作者 | Moustakas, Aristides |
来源期刊 | JOURNAL OF VEGETATION SCIENCE |
ISSN | 1100-9233 |
出版年 | 2006 |
卷号 | 17期号:4页码:473-480 |
英文摘要 | Question: Is there a relationship between size and death in the Iona-lived, deep-rooted tree, Acacia erioloba, in a semi-arid savanna? What is the size-class distribution of A. erioloba mortality? Does the mortality distribution differ from total tree size distribution? Does A. erioloba mortality distribution match the mortality distributions recorded thus far in other environments? Location: Dronfield Ranch, near Kimberley, Kalahari, South Africa. Methods: A combination of aerial photographs and a satellite image covering 61 year was used to provide long-term spatial data on mortality. We used aerial photographs of the study area from 1940, 1964, 1984, 1993 and a satellite image from 2001 to follow three plots covering 510 ha. We were able to identify and individually follow ca. 3000 individual trees from 1940 till 2001. Results: The total number of trees increased over time. No relationship between total number of trees and mean tree size was detected. There were no trends over time in total number of deaths per plot or in size distributions of dead trees. Kolmogorov-Smirnov tests showed no differences in size class distributions for living trees through time. The size distribution of dead trees was significantly different from the size distribution of all trees present on the plots. Overall, the number of dead trees was low in small size classes, reached a peak value when canopy area was 20 - 30 m(2), and declined in lamer size-classes. Mortality as a ratio of dead vs. total trees peaked at intermediate canopy sizes too. Conclusion: A. erioloba mortality was size-dependent, peaking at intermediate sizes. The mortality distribution differs from all other tree mortality distributions recorded thus far. We suggest that a possible mechanism for this unusual mortality distribution is intraspecific competition for water in this semi-arid environment. |
英文关键词 | competition long-term data remote sensing savanna size dependent mortality size distribution tree death |
类型 | Article |
语种 | 英语 |
国家 | Germany ; South Africa |
收录类别 | SCI-E |
WOS记录号 | WOS:000241092700008 |
WOS关键词 | POPULATION-DYNAMICS ; SEMIARID SAVANNAS ; SIMULATION-MODEL ; NEGEV DESERT ; ARID SAVANNA ; TREES ; GROWTH ; SIZE ; AGE ; DISTRIBUTIONS |
WOS类目 | Plant Sciences ; Ecology ; Forestry |
WOS研究方向 | Plant Sciences ; Environmental Sciences & Ecology ; Forestry |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/152408 |
作者单位 | (1)Univ Jena, Inst Ecol, DE-07743 Jena, Germany;(2)Univ Marburg, Dept Geog, Res Lab GIS & Remote Sensing, DE-35037 Marburg, Germany;(3)Univ KwaZulu Natal, Sch Biol & Conservat Sci, ZA-3209 Scottsville, South Africa;(4)Univ Potsdam, DE-14469 Potsdam, Germany |
推荐引用方式 GB/T 7714 | Moustakas, Aristides,Guenther, Matthias,Wiegand, Kerstin,et al. Long-term mortality patterns of the deep-rooted Acacia erioloba: The middle class shall die![J],2006,17(4):473-480. |
APA | Moustakas, Aristides.,Guenther, Matthias.,Wiegand, Kerstin.,Mueller, Karl-Heinz.,Ward, David.,...&Jeltsch, Florian.(2006).Long-term mortality patterns of the deep-rooted Acacia erioloba: The middle class shall die!.JOURNAL OF VEGETATION SCIENCE,17(4),473-480. |
MLA | Moustakas, Aristides,et al."Long-term mortality patterns of the deep-rooted Acacia erioloba: The middle class shall die!".JOURNAL OF VEGETATION SCIENCE 17.4(2006):473-480. |
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