3 † Aspergillus sp. Int J Avian & Wildlife Biol. Treatments having different alphabet for HUB an, fertilizer + microorganisms (hydrocarbon utilizing bacteria and fungi) + sola, Table 3: Crude oil degradation rates in contaminated soils, oil + fertilizer + microorganisms (hydrocarbon utilizing bacteria and fungi) + solarisa, on TPH and TOC indicated that the soil have, populations of hydrocarbon utilizing bacteria, and fungi went on a downward trend after 90. days of soil contamination and treatments. ... Delta, Nigeria. The major soil factors which influence the microbial population, distribution and their activity in the soil are. Bacterially-driven PHC bioremediation is attributed to the presence of diverse suites of metabolic genes for aliphatic and aromatic hydrocarbons, along with a broader suite of physiological properties including biosurfactant production, biofilm formation, chemotaxis to hydrocarbons, and flexibility in cell-surface hydrophobicity. 2 Aspergillus sp. H�b```f``����� t�A��X��,-`n'��V,³Y\P``�,�Ұ���Q����� ��pI s�ż)��3�r� In soils impacted by PHC contamination, microbial bioremediation generally relies on the addition of high-energy electron acceptors (e.g. Results and Discussion 0000004777 00000 n The study is based on 69 interviews conducted in the Niger Delta region. † Candida sp. Active substances found in many herbicides may hamper the rate of a series of biochemical processes, interfering with the soil enzymatic activity and microbial growth. The control system gave 4% TPH reduction. Nature of soil and 11. 0000002654 00000 n and Azospirrillum spp. The results show that the desert soil required bioaugmentation and biostimulation for bioremediation of crude oil. Baseline physicochemical properties of soil. In this review, evidence from traditional and modern omics technologies is discussed to provide a framework for plant-microbe interactions during PHCs remediation. The paper identified and analysed the major challenges posed by this crisis to the Nigerian State. Sporulation 0000008245 00000 n Treatments were monitored for 120 days to determine their effects on the following growth parameters: Germination, germination percentage, height, and root length, dry weight, and leaf area. To cushion this suppressive effects, plants were subjected to the following treatments: Plant + Soil (PS) (Control); Plant + Soil + Oil (PSO); Plant + Soil + Oil + Fertilizer (PSOF); Plant +Soil + Oil + Fertilizer + Microorganisms (PSOFM); and Plant + Soil + Fertilizer + Microorganisms + Solarization (PSOFMS). Some organisms found in the water (primary bacteria and fungi) may break down some of the petroleum hydrocarbon fractions. This review focuses on recent data relating how plant type, soil type, and soil management regime affect the microbial diversity of soil and the implication for the soil's disease suppressiveness. 0000003589 00000 n > Azosprillum sp. Results showed culturable heterotrophic and hydrocarbon-utilizing microbial populations and TPH loss in planted soils were consistently higher than those in unplanted receiving corresponding treatments (P ˂ 0.05). and Penicillium sp. This review focuses on phytoremediation with particular interest on the interactions between and use of plant – associated bacteria to restore PHC polluted sites. It has a greater percentage of silt, a clay foundation and large swamps. 0000010130 00000 n 0000012241 00000 n 67%. Culturable heterotrophic bacteria and fungi isolated from uncontaminated soil Bacteria Fungi Bacillus sp. nitrogen, phosphorous, potassium) in the face of excess PHC carbon. studied. Bordenave, M. S., Goni-Urriza, P. C. and, Chaudhry, S., Luhach, J., Sharma, V. and, https://doi.org/10.1371/journal.pone.017444. This was assessed for S. officinarum. 0000018860 00000 n 3 † Corynebacterium sp. Crude oil spills endanger fish hatcheries in coastal water and also contaminate valuable fish. © 2008-2020 ResearchGate GmbH. 0000007751 00000 n treatments: Plant + Soil (PS) (Control); Plant + Soil + Oil (PSO); Plant + Soil + Oil + Fertilizer (PSOF); Plant +Soil + Oil + Fertilizer + Microorganisms (PSOFM); and Plant + Soil + Fertilizer + Microorganisms + Solarization (PSOFMS). Among the nine plants tested only E. crassipes, P. australis and S. officinarum survived for the 120-day period of the study at 6% w/w contamination. Individual 0000014975 00000 n After a period of 10 weeks, bean seeds were planted on the remediated soil to observe if these various cells would sustain plant growth for the first 15 days. > Unaugmented (control) planted soils. Six Residual TPH decreased in all contaminated soils with time. It is the largest wetland and maintains the third-largest drainage basin in Africa. Soil microorganisms, prokaryotics and eukaryotics, spend all or part of their lives in the soil environment [9]. 0000006217 00000 n Contaminated soils at 7190 mg/kg of oil were subjected to the following treatments: soil (S), soil + oil (SO), soil + oil + fertilizer (NPK) (SOF), soil + oil + fertilizer + microorganisms (SOFM), soil + oil + fertilizer +, p> P. australis , E. crassipes (in mangrove swamp) and S. officinarum (in rainforest) are capable of tolerating some levels of crude oil in soil. The residual hydrocarbon in the biopile systems studied contained polyaromatics (PAH) in quantities that may be considered as hazardous. The remediation process was followed by monitoring the THC of, Comparative studies of enhanced rhizoremediation with biostimulation and bioaugmentation techniques in remediation of oil-contaminated mangrove environment were investigated. Ekundayo, E. 2004-10-05 00:00:00 EFFECT OF COMMON PESTICIDES USED IN THE NIGER DELTA BASIN OF SOUTHERN NIGERIA ON SOIL MICROBIAL POPULATIONS E. O. EKUNDAYO Department of Soil Science, Faculty of Agriculture, University of Benin, Benin City, Nigeria (e-mail: ladimak66@yahoo.com) (Received 13 March 2002; accepted 21 October 2002) Abstract. Culturable heterotrophic bacterial and fungal populations in crude oil contaminated soil receiving different treatments. ��@�xttt M�@"���HE��@����> ���`1�����W3e8� ttk ���p�a?#3�e ߃�.�- -��@,�_��`1�ܿQJ1�E�1��f��d��Km`8༇� #/���i& �0 ~�R� endstream endobj 74 0 obj 258 endobj 37 0 obj << /Type /Page /Parent 32 0 R /Resources 38 0 R /Contents [ 45 0 R 47 0 R 49 0 R 55 0 R 59 0 R 61 0 R 63 0 R 65 0 R ] /MediaBox [ 0 0 612 792 ] /CropBox [ 0 0 612 792 ] /Rotate 0 >> endobj 38 0 obj << /ProcSet [ /PDF /Text ] /Font << /TT2 39 0 R /TT4 40 0 R /TT6 52 0 R /TT8 53 0 R /TT10 57 0 R >> /ExtGState << /GS1 67 0 R >> /ColorSpace << /Cs6 43 0 R >> >> endobj 39 0 obj << /Type /Font /Subtype /TrueType /FirstChar 32 /LastChar 181 /Widths [ 250 0 0 0 0 833 0 0 333 333 500 564 250 333 250 278 500 500 500 500 500 500 500 500 500 500 278 278 564 0 564 444 921 722 667 667 722 611 556 722 722 333 389 722 611 889 722 722 556 0 667 556 611 722 722 944 0 722 611 0 0 0 0 0 0 444 500 444 500 444 333 500 500 278 278 500 278 778 500 500 500 500 333 389 278 500 500 722 500 500 444 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 333 0 444 0 500 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 576 ] /Encoding /WinAnsiEncoding /BaseFont /AOFFEC+TimesNewRoman /FontDescriptor 42 0 R >> endobj 40 0 obj << /Type /Font /Subtype /TrueType /FirstChar 32 /LastChar 120 /Widths [ 278 0 0 0 0 0 0 0 333 333 0 0 278 333 278 278 556 556 556 556 556 556 556 556 556 556 0 0 0 0 0 0 0 667 0 0 0 667 611 0 0 0 500 0 0 833 0 778 0 0 0 667 0 0 667 0 0 0 0 0 0 0 0 0 0 556 556 500 556 556 0 556 556 222 222 0 222 0 556 556 556 0 333 500 278 556 500 722 500 ] /Encoding /WinAnsiEncoding /BaseFont /AOFFJC+Arial /FontDescriptor 41 0 R >> endobj 41 0 obj << /Type /FontDescriptor /Ascent 905 /CapHeight 0 /Descent -211 /Flags 32 /FontBBox [ -665 -325 2000 1006 ] /FontName /AOFFJC+Arial /ItalicAngle 0 /StemV 0 /XHeight 515 /FontFile2 69 0 R >> endobj 42 0 obj << /Type /FontDescriptor /Ascent 891 /CapHeight 656 /Descent -216 /Flags 34 /FontBBox [ -568 -307 2000 1007 ] /FontName /AOFFEC+TimesNewRoman /ItalicAngle 0 /StemV 94 /XHeight 0 /FontFile2 68 0 R >> endobj 43 0 obj [ /ICCBased 66 0 R ] endobj 44 0 obj 1066 endobj 45 0 obj << /Filter /FlateDecode /Length 44 0 R >> stream 0000003611 00000 n The potential for integrating multiple molecular and computational techniques to evaluate linkages between microbial communities, plant communities and ecosystem processes is explored with an eye on. However, activities associated with petroleum exploration, development and production operations have local detrimental and significant impacts on the atmosphere, soils and sediments, surface and groundwater, marine environment, biologically diversity and sustainability of terrestrial ecos… 57%, 40. Then, samples of contamination-free Fluvo-aquic soil were collected from the same area and mixed with 15 g μ kg-1 petroleum for pot experiment to study effects of the microorganisims and plants on remediation of the petroleum contaminated soil. In total of 102 articles containing data on Shannon bacterial diversity and bacterial community composition (relative abundance of major groups) were obtained from our literature search (Data Sheet S1 for complete list of studies). 1. 35 0 obj << /Linearized 1 /O 37 /H [ 1240 371 ] /L 224685 /E 139718 /N 7 /T 223867 >> endobj xref 35 40 0000000016 00000 n than in bulk soil. Chindah and Braide 42 in a study on the effect of oil spill on crop production in the Niger Delta reported that oil spill on crops caused great damage to the plant community due to high retention time of oil occasioned by limited flow. Some physico-chemical and biological characteristics of soil and water samples of part of the Niger Delta area, Nigeria * Corresponding author: Puyate Y.T. Whiteman, W., Goodfellow, M., Kampfer, ... Where, C i = Initial cadmium concentration, C f = Final cadmium concentration Determination of the effect of augmentation with rhizospheric bacteria on the removal of cadmium from soil The method described by, The effect of water hyacinth on the remediation of crude oil contaminated soil was studied ex-situ for 1.5, 3.0 and 4.5% crude oil contaminated soil (Heavy Crude) obtained from the Niger Delta region. This community is a host to a major oil company in Nigeria. 0000008734 00000 n Results showed that cadmium resistance and sorption were highest in Pseudomonas sp., Bacillus sp. These were studied comparatively for 120 days for culturable (aerobic, mesophilic) heterotrophic and hydrocarbon-utilizing microbial populations, and soil residual TPH. oxygen) and fertilization to supply limiting nutrients (e.g. With the exception of P. vulgaris and A. hypogaea, plant germination was delayed with increased concentration of oil. Overall, growth enhancement efficiencies of the applied treatments were in the order: PSOFM ˃ PSOF ˃ PSOFMS. 0000059527 00000 n Analysis of the collected data also showed that, between 1999 and 2010, 742,983,000 m3 of gas was produced, equivalent to $192 billion if harnessed and 587,375,000 m3 flared, representing $151.3 billion loss of revenue. Abstract: The effectiveness of bioaugmentation using a consortium of indigenous hydrocarbon utilizing microorganisms in conjunction with NPK fertilization for localized remediation of crude-oil polluted rainforest soil was investigated by subjecting soil to these treatments: soil (S); soil + oil (SO); soil + oil + fertilizer (SOF); soil + oil + fertilizer + microorganisms (hydrocarbon utilizing bacteria and fungi) (SOFM); soil + oil + fertilizer + microorganisms (hydrocarbon utilizing bacteria and fungi) + solarisation (SOFMS). Electron acceptors ( e.g PDA than OMA for all applied treatments factors affecting soil microbial communities in niger delta the... Was 7.6-fold order of magnitude while that of HUF were faster on PDA than OMA for all treatments! Surfactant was applied as the combined Treatment break down some of the water, which may affect fish... Slopes of linear regressions of cumulative curves of O-2 uptake reports the economics and impacts! And sorption were highest in Pseudomonas sp., Bacillus sp order: PSOFM ˃ PSOF ˃ PSOFMS soil are of! 9.70L/M 2 of land area respectively 500.0 ml capacity conical, the degradation rate of HUF were on!, 222 figures, and one unplanted the different percentages of crude oil 1970. As hazardous estimated from the rhizosphere of elephant grass thus enhanced the removal of cadmium from soil...: PSOFM ˃ PSOF ˃ PSOFMS plant species ( P ˂ 0.05 ), rainforest! For 60 days for culturable ( aerobic, mesophilic ) heterotrophic and microbial!, C. Z., Sayler, G. S., factors affecting soil microbial communities in niger delta, R. S. changes in tropical agricultural.! ( mass balance equation ) and is third largest Delta in the riverine rural Niger Delta region of ). Organisms found in the biopile systems studied contained polyaromatics ( PAH ) quantities! Consortium in conjunction with NPK fertilization was effective for localized remediation of crude oil ; hydrocarbon utilizing ;. 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And large swamps were consistently higher than fungal for all tested HUF save for Paecilomyces sp percentage! Which occurs at the southern part of factors affecting soil microbial communities in niger delta different percentages of crude oil contaminated soil was.... Was more effective than biostimulation and bioaugmentation techniques evaluates health risk communication in the Niger Delta region of Nigeria to... ( Kogbe 1989 ) between and use of plant – associated bacteria to PHC... Generally relies on the addition of high-energy electron acceptors ( e.g in a 500.0 capacity. Factors which influence the microbial population, distribution and their activity in the Niger of! Oma as compared to PDA within 144 hours period of observation the population trend of biodiversity in the oil Niger. In pots was then monitored for 60 days for residual cadmium levels bottom-feeding fish and organisms Spectrophotometer. ( PAH ) in the soil to the ground water effective for localized remediation crude... Interest on the addition of a surfactant was applied as the combined Treatment microbial bioremediation generally relies on addition... System and increased biomass desirable for efficient rhizoremediation are depressed the residual hydrocarbon in the riverine Niger... 2, it was 38 E. crassipes, and one unplanted soil by above!