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Study of Soil Seed Banks in Antaibao Opencast Mine

Journal of China University of Mining and Technology 2006年第3期16卷 333-337页

作者： HAN Li-jun BAI Zhong-ke LI Jin-chuan College of resource ＆ Environmental Science Shanxi Agricultural University Taigu Shanxi 030801 China Department of Land Science Technique China University ofGeosciences Beijing 100083 China Institute of Biology in Shanxi Taiyuan Shanxi 030006 China

A seed germinating method was used to study soil seed banks in dump sites of the Antaibao opencast mine for soil reclamation and ecological rehabilitation. Based on a richness index, a diversity index and an evenness index, the diversity of species of soil seed banks was studied. As well, the progress of vegetation succession in this thoroughly destroyed ecosystem is discussed and the self-renewal ability of the soil seed banks is analyzed. The results indicate that 1） there are 17 plant species belonging to five families with annuals as the dominant species; 2） the soil seed banks at the dump site show great temporal and spatial heterogeneity and 3） the model of Robinia pseudoacacia x Pinus tabulaeformis × Caragana korshinskii in the anaphase is the best among several reclamation models studied. Therefore, with the extension of reclamation time, the correct choice of a reclamation model is quite helpful for the improvement of the self-renewal ability of soil seed banks and for the stability of the ecosystem, which is very important for land reclamation and ecological rehabilitation of the dump sites of the ATB opencast coal mine.

关键词： dump of Antaibao opencast mine re-vegetation soil seed bank species diversity

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Effects of artificial vegetation arrangement and structure on the colonization and development of biological soil crusts

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research in Cold and Arid regions 2016年第4期8卷 343-349页

作者： Yang Zhao Peng Zhang YiGang Hu Lei Huang Shapotou Desert research and Experiment Station Cold and Arid Regions Environmental and Engineering Research Institute Chinese Academy of Sciences

The colonization and development of biological soil crusts （BSCs） are rarely discussed when investigating vegetation restoration with difference arrangement and structure of anthropogenically damaged areas in semi-arid regions. The present study analyzes the relationships among coverage, height and density of woody vegetation and coverage and thickness of BSCs on the surface mine dumpsite in Heidaigou, China. results showed that PR （Prunus sibirica L.）, PT （Pinus tabulaeformis Carr.） and PPr （P. tabulaeformis Carr., P. sibirica L.） types had the highest coverage of total BSCs, which were 76.8%, 75.9% and 78.9%, respectively and PR showed the thickest BSCs of 4.41 mm. There was a significant correlation between coverage and thickness of BSCs and coverage and height of woody vegetation as a unimodal curve. Our findings suggest that a single woody plant species and low level coverage and height （no more than 30% and 300 cm, respectively） of woody plants may be able to create suitable conditions for facilitating BSCs restoration on the surface of mine dumpsites. The effects of vegetation arrangement and structure on BSCs colonization and development should be considered in reconstructing and managing woody vegetation in disturbed environments, such as surface mine dumpsites in semi-arid areas.

关键词： vegetation coverage mine dumping site re-vegetation woody vegetation

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Microbiomes of Top and Sub-Layers of Semi-Arid Soils in North-Eastern Nigeria Are Rich in Firmicutes and Proteobacteria with Surprisingly High Diversity of Rare Species

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Advances in Microbiology 2019年第1期9卷 102-118页

作者： Mwajim Bukar Oluwole Sodipo Karim Dawkins Roberto Ramirez Jummai T. Kaldapa Martha Tarfa Nwadiuto Esiobu North-East Zonal Biotechnology Centre of Excellence University of Maiduguri Maiduguri Nigeria Biochemistry Department Faculty of Science University of Maiduguri Maiduguri Nigeria Biological Sciences Department Microbial Biotech Laboratory Florida Atlantic University Boca Raton FL USA

Borno state is the second largest state in Nigeria with over 70,000 square kilometers of diverse ecosystems including parts of the fertile Lake Chad basin. However, more than 2/3 of this landmass is threatened with drought, advancing desertification and degraded soils. Most restoration efforts involve revegetation, which in the past has met with limited success. Microbial communities of soils play a pivotal role in soil fertility and plant cover. We conducted the first metagenomic amplicon sequencing study, comparing two soil depths to determine whether soil bacteria abundance and diversity in the harsh bare soils were sufficient to sustain greening efforts. The goal was to glean insights to guide microbial inoculant formulation needed in the region. Samples from top (0 - 15 cm) and sub (16 - 65 cm) soils were collected from five strategic locations in the state. Using next generation Illumina sequencing protocols, total DNA extracted directly from the soils was sequenced and analyzed by QIIME. Metadata collected from site showed scorching temperatures of over 46?C, near zero moisture level and a pH of about 6 for top soil. At 65 cm depth, the temperature averaged 32?C with a pH of 5 and significantly higher soil moisture of 0.1%. The bacterial community structure was unexpectedly very diverse at both soil depths samples, recording a ChaO1 index ranging from 909 to 4296 and a Shannon diversity range of 3.54 to 6.33. The most abundant phyla in both soil depths were the Firmicutes and Proteobacteria;however the relative abundance of composite lower taxa was strikingly different. Operational taxonomic units and diversity indices were highest for top soils and were dominated by members of resilient groups of Actinobacteria, Firmucutes, Acidobacteria and numerous other less well-known taxa whose individual relative abundance did not exceed 3% of total population. The high diversity and richness of Proteobacteria (at 65 cm depth), some of which are key to soil fertility,

关键词： Microbiomes Semi-Arid Soils Microbial Community Structure Soil Bacteria Soil Fertility Top-Soil re-vegetation Proteobacteria Firmicutes Sub-Surface OTU

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Performance of Tree Species Growing on Tailings Dam Soils in Zambia： A Basis for Selection of Species for re-vegetating Tailings Dams

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Journal of Environmental Science and Engineering(B) 2012年第7期1卷 827-831页

作者： Martin K. Kambing'a Stephen Syampungani Department of Forest resource Management School of Natural Resources The Copperbelt University Kitwe 21692 Zambia

To facilitate the development of the basis for the selection of plants for re-vegetating tailings in Zambia, an as sessment of the performance of tree species growing on tailings dams was conducted. The performance of species was determined in terms of relative density, frequency and importance value for each species. The study reveals variations in performance of species; for example in terms of importance values, Acacia polyacantha （33.5%）, Toona ciliata （21.4%）, Acacia sieberana （9.9%）, Bauhinia thonningii （9.1%） and Peltophorum africanum （8.3%） were the most dominant species. The dominance of these species on tailings dams demonstrates tolerance to railings dams conditions. The study recommends that emphasis must be placed on these species in re-vegetating tailings dams.

关键词： Tailings tree performance re-vegetation importance values.

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