刚果民主共和国加丹加Tenke-Fungurume金属生态系统土壤化学性质变化因素

Q4 Environmental Science Tropicultura Pub Date : 2019-01-01 DOI:10.25518/2295-8010.250
Donato Kaya Muyumba, E. I. W. Ilunga, M. Faucon, G. Mahy, A. Liénard, M. Séleck, Michel Ngongo Luhembwe, G. Colinet
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引用次数: 2

摘要

我们的研究旨在加深我们对刚果民主共和国Tenke-Fungurume金属生态系统中土壤性质与植被分布之间关系的理解。第一个问题是主要植被单元土壤之间的异同,并通过多变量分析总结了土壤性质的4个变化因子。它们都与岩性有关,对解释植被单元的分布有重要贡献。研究结果表明,不同植被单元(石质草原稀树草原、草地、坡上或登波上的草原稀树草原)土壤性质的变化部分归因于不同地点间岩石地球化学组成的差异,但主要的变异源是在每个山丘内部。土壤中Cu和Co的污染来源于岩石的风化作用,除了场地效应和岩石的地形分布外,一个植被单元内土壤性质的变异性可能是由于土壤母质的变异性,而不仅仅是由于侵蚀。第二个问题涉及小距离土壤性质的变化。从相邻植被单元之间的样条研究了度量变化。我们的研究结果表明,在野外明确识别的植被单元突变都可以通过与岩性相关的一种或多种性质的变化来真正解释。重点是铜的生物利用度。
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Factors of Variation of Soil Chemical Properties in Metalliferous Ecosystems of Tenke-Fungurume, Katanga, Democratic Republic of the Congo
Our study aimed at deepen our understanding of relationships between soil properties and vegetation distribution in metalliferous ecosystems of Tenke-Fungurume in the Democratic Republic of Congo. The first question concerned the differences and similarities between soils of the main vegetation units and four variation factors of soil properties were summarized by multivariate analysis. They were all linked to lithology and significantly contributed to explain the distribution of vegetation units. Our result suggest that the variation of soil properties which is observed within the various vegetation units (rocky steppe savanna, sward, and steppe savannas on slope or on Dembo) should partially be attributed to differences of geochemical composition of rocks between sites but the main source of variability is to be found inside each hill. The soil contamination in Cu and Co originates from rock weathering and besides site effect and topographic distribution of the rocks, the variability of soil properties within one vegetation unit may be due to variability of soil parent material and not only to erosion. The second question dealt with the changes of soil properties at small distances. Metric variation was studied from transects between adjacent vegetation units. Our results showed that the abrupt changes of vegetation units which were clearly identified on the field were all truly explained by the variations of one or more properties linked to lithology. The key point being the Cu bioavailability.
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来源期刊
Tropicultura
Tropicultura Agricultural and Biological Sciences-Agricultural and Biological Sciences (all)
CiteScore
0.70
自引率
0.00%
发文量
3
审稿时长
30 weeks
期刊介绍: Tropicultura is a multi‐disciplinary journal, which publishes original articles, research and summary notes, overviews of books and essays, announcements and reports on films / audio‐visual resources concerning all fields linked to rural development, as well as sustainable management of the environment in overseas countries.
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