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Responses of Bacterial Taxonomical Diversity Indicators to Pollutant Loadings in Experimental Wetland Microcosms. WATER 2022. [DOI: 10.3390/w14020251] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Urbanization results in higher stormwater loadings of pollutants such as metals and nutrients into surface waters. This directly impacts organisms in aquatic ecosystems, including microbes. Sediment microbes are known for pollution reduction in the face of contamination, making bacterial communities an important area for bioindicator research. This study explores the pattern of bacterial responses to metal and nutrient pollution loading and seeks to evaluate whether bacterial indicators can be effective as a biomonitoring risk assessment tool for wetland ecosystems. Microcosms were built containing sediments collected from wetlands in the urbanizing Pike River watershed in southeastern Wisconsin, USA, with metals and nutrients added at 7 day intervals. Bacterial DNA was extracted from the microcosm sediments, and taxonomical profiles of bacterial communities were identified up to the genera level by sequencing 16S bacterial rRNA gene (V3–V4 region). Reduction of metals (example: 90% for Pb) and nutrients (example: 98% for NO3−) added in water were observed. The study found correlations between diversity indices of genera with metal and nutrient pollution as well as identified specific genera (including Fusibacter, Aeromonas, Arthrobacter, Bacillus, Bdellovibrio, and Chlorobium) as predictive bioindicators for ecological risk assessment for metal pollution.
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Palm ER, Guidi Nissim W, Adamcová D, Podlasek A, Jakimiuk A, Vaverková MD. Sinapis alba L. and Triticum aestivum L. as biotest model species for evaluating municipal solid waste leachate toxicity. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 302:114012. [PMID: 34731708 DOI: 10.1016/j.jenvman.2021.114012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Revised: 10/11/2021] [Accepted: 10/24/2021] [Indexed: 06/13/2023]
Abstract
The volume of municipal solid waste (MSW) inputs is rapidly increasing with a growing human population, and its composition is changing due an increased diversity of materials being deposited. There is an associated increase in leachate, a common toxic byproduct of MSW facilities that must be collected and treated prior to its release into the environment. There is growing interest in plant-based methods that are economical and efficient for leachate toxicity assessment such as biological tests that use indicator species. In the present study, the tolerance thresholds of two herbaceous species, Sinapis alba L. (mustard) and Triticum aestivum L. (wheat) to increasing shares of leachate sourced from an MSW facility in the Czech Republic were assessed through a variety of physiological parameters. Soil-based biotests showed a stimulation in the shoot biomass, leaf expansion, primary root elongation and carbon assimilation rate of the selected plant species to leachate concentrations between 20 and 50 %. Higher leachate concentrations led to reductions in most physiological parameters, especially the elongation of seedling roots when growth solutions with >50 % leachate were applied. While S. alba was more sensitive to increasing proportions of leachate in terms of growth parameters of the shoot tissues, photosystem II efficiency and chlorophyll pigment concentrations were more responsive in T. aestivum, indicating species-dependent differences. The present biotests provide further support for the use of both Sinapis alba L and Triticum aestivum L. as indicator species of phytotoxicity.
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Affiliation(s)
- Emily Rose Palm
- Department of Agriculture, Food, Environment and Forestry (DAGRI), University of Florence, Viale delle idee, 30, 50019, Sesto Fiorentino, FI, Italy
| | - Werther Guidi Nissim
- Department of Agriculture, Food, Environment and Forestry (DAGRI), University of Florence, Viale delle idee, 30, 50019, Sesto Fiorentino, FI, Italy; PNAT s.r.l, via delle Cascine, 33/35, 50144, Firenze, Italy.
| | - Dana Adamcová
- Department of Applied and Landscape Ecology, Faculty of AgriSciences, Mendel University in Brno, Zemědělská 1, 613 00, Brno, Czech Republic
| | - Anna Podlasek
- Institute of Civil Engineering, Warsaw University of Life Sciences - SGGW, Nowoursynowska 159, 02 776, Warsaw, Poland
| | - Aleksandra Jakimiuk
- Institute of Civil Engineering, Warsaw University of Life Sciences - SGGW, Nowoursynowska 159, 02 776, Warsaw, Poland
| | - Magdalena Daria Vaverková
- Department of Applied and Landscape Ecology, Faculty of AgriSciences, Mendel University in Brno, Zemědělská 1, 613 00, Brno, Czech Republic; Institute of Civil Engineering, Warsaw University of Life Sciences - SGGW, Nowoursynowska 159, 02 776, Warsaw, Poland
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