大量培养可产生生物柴油的绿藻 Tetraselmis striata 对微生物生态系统的矛盾影响:来自中观宇宙实验的证据

IF 4.6 2区 生物学 Q1 BIOTECHNOLOGY & APPLIED MICROBIOLOGY Algal Research-Biomass Biofuels and Bioproducts Pub Date : 2024-10-01 DOI:10.1016/j.algal.2024.103735
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引用次数: 0

摘要

作为试点项目,韩国西部沿海水域(仁川)从 2012 年至 2019 年运行了一个 280 吨级的条纹四膜藻大规模培育工厂,以生产生物柴油燃料。这是全球首次在近海水域建造用于生产生物柴油的微藻大规模培养工厂,此前也没有研究调查过微藻大规模培养工厂对周围微生态系统的影响。在这项研究中,模拟大规模条纹叶藻培养工厂的生物反应器(1×和 10×)被安装在半透膜中观池(5 吨)中,以评估其对微生物生态系统的影响。结果表明,从 T. striata 生物反应器中释放出大量溶解有机碳(DOC)。10× 池塘的 DOC 浓度为 21.3 mg/L,而对照池塘的 DOC 浓度为 2.1 mg/L。在水质指数(WQI)方面,安装了 1× 和 10× 生物反应器的中观池塘通过降低营养水平和增加溶解氧水平,从实验开始时的二级(良好)提高到一级(优秀)。然而,从生物多样性的角度来看,微生物生态系统恶化了,浮游动物、纤毛虫和浮游植物的多样性减少了。相关性分析和随机森林变量重要性测量结果表明,驱动这些变化的主要因素是 DOC 水平升高导致的细菌群落的改变。这些研究结果表明,虽然大量养殖条纹状藻类可能会改善水质的物理化学状况,但会对生物环境产生不利影响。因此,在海洋环境中大规模培养微藻时,全面监测物理、化学和生物因素至关重要。
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Ambivalent effects of mass cultivation of biodiesel producible green alga Tetraselmis striata on a microbial ecosystem: Evidence from mesocosm experiments
A 280-ton plant for the mass cultivation of Tetraselmis striata was operated from 2012 to 2019 to produce biodiesel fuel in western Korean coastal waters (Incheon) as a pilot project. This was the first instance globally where a microalgal mass cultivation plant for biodiesel production was implemented in coastal waters, and no prior studies had investigated the impact of microalgal mass cultivation plant on surrounding microecosystems. In this study, bioreactors (1× and 10×) mimicking a large-scale T. striata cultivation plant were installed in semi-permeable a mesocosms (5 tons) to assess their impact on the microbial ecosystem. The results showed that the release of large amounts of dissolve organic carbon (DOC) from the T. striata bioreactors. The 10× pond had a DOC concentration of 21.3 mg/L compared to the control pond of 2.1 mg/L. For the Water Quality Index (WQI), the 1× and 10× bioreactor installed mesocosms improved from Class II (Good) at the beginning of the experiment to Class I (Excellent) via decreasing nutrient levels and increasing of DO levels. However, from a biodiversity perspective, the microbial ecosystem deteriorated, with reductions in the diversity of zooplankton, ciliates, and phytoplankton. The correlation analysis and random forest variable importance measures indicated that the primary factor driving these changes was the alteration of the bacterial community due to elevated DOC levels. These findings indicate that while the mass cultivation of T. striata may improve physicochemical water quality, it has adverse effects on biological environments. Therefore, it is crucial to monitor physical, chemical, and biological factors comprehensively when cultivating microalgae on a large scale in marine environments.
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来源期刊
Algal Research-Biomass Biofuels and Bioproducts
Algal Research-Biomass Biofuels and Bioproducts BIOTECHNOLOGY & APPLIED MICROBIOLOGY-
CiteScore
9.40
自引率
7.80%
发文量
332
期刊介绍: Algal Research is an international phycology journal covering all areas of emerging technologies in algae biology, biomass production, cultivation, harvesting, extraction, bioproducts, biorefinery, engineering, and econometrics. Algae is defined to include cyanobacteria, microalgae, and protists and symbionts of interest in biotechnology. The journal publishes original research and reviews for the following scope: algal biology, including but not exclusive to: phylogeny, biodiversity, molecular traits, metabolic regulation, and genetic engineering, algal cultivation, e.g. phototrophic systems, heterotrophic systems, and mixotrophic systems, algal harvesting and extraction systems, biotechnology to convert algal biomass and components into biofuels and bioproducts, e.g., nutraceuticals, pharmaceuticals, animal feed, plastics, etc. algal products and their economic assessment
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