scholarly journals A Comparison of Different Natural Groundwaters from Repository Sites—Corrosivity, Chemistry and Microbial Community

2021 ◽  
Vol 2 (4) ◽  
pp. 603-624
Author(s):  
Mervi Somervuori ◽  
Elisa Isotahdon ◽  
Maija Nuppunen-Puputti ◽  
Malin Bomberg ◽  
Leena Carpén ◽  
...  
Keyword(s):  
Microbial Community ◽  
Local Environment ◽  
Water Origin ◽  
Steel Grades ◽  
Steel Aisi ◽  
Simulated Groundwater ◽  
Abundance And Diversity ◽  
Reference Measurements ◽  
Intermediate Level Radioactive Waste

In Finland, the repositories for low and intermediate-level radioactive waste (LLW and ILW) will be situated at three different geographical locations in about 60 to 100 m deep granite bedrock where the waste and waste containers can be subjected to anoxic groundwater containing microbes. The composition of groundwater varies in terms of chemistry and microbial activity in different locations. In this study, groundwater from the three repository areas was analyzed in respect to chemistry and microbial community. Corrosion tendency of three steel grades, carbon steel AISI/SAE 1005 and stainless steels AISI 304 and 316L, was studied in these groundwater environments using electrochemical methods. As a reference, measurements were also performed in simulated groundwater without microbes. The measurements show that corrosivity of the water and thus the steels’ performance differs depending on water origin. In addition, the groundwater differed remarkably in their chemical composition as well as abundance and diversity of microbial community between the sites. Consequently, the local environment has to be considered when evaluating the long-term evolution of disposal concepts.

scholarly journals Biodiversity of butterflies in endosulfan-affected areas of Kerala, India

2020 ◽  
Vol 81 (1) ◽  
Author(s):  
K. N. Raghavendra ◽  
Kumar Arvind ◽  
G. K. Anushree ◽  
Tony Grace
Keyword(s):  
Monsoon Season ◽  
Winter Season ◽  
Wiener Index ◽  
Long Term Effects ◽  
Affected Area ◽  
Butterfly Assemblages ◽  
Abundance And Diversity ◽  
The One ◽  
One Way Anova

Abstract Background Butterflies are considered as bio-indicators of a healthy and diversified ecosystem. Endosulfan was sprayed indiscriminately in large plantations of Kasaragod district, Kerala which had caused serious threats to the ecosystem. In this study, we surveyed the butterflies for their abundance and diversity in three differentially endosulfan-affected areas viz., Enmakaje—highly affected area, Periye—moderately affected area, Padanakkad—unaffected area, carried out between the end of the monsoon season and the start of the winter season, lasting approximately 100 days. Seven variables viz., butterfly abundance (N), species richness (S), Simpson’s reciprocal index (D), the Shannon–Wiener index (H′), the exponential of the Shannon–Wiener index (expH′), Pielou’s evenness (J) and species evenness (D/S), related to species diversity were estimated, followed by the one-way ANOVA (F = 25.01, p < 0.001) and the Kruskal-Wallis test (H = 22.59, p < 0.001). Results A population of three different butterfly assemblages comprised of 2300 butterflies which represented 61 species were encountered. Our results showed that Enmakaje displayed significantly lower butterfly diversity and abundance, compared to the other two communities. Conclusion So far, this is the first study concerning the effect of endosulfan on the biodiversity of butterfly in the affected areas of Kasaragod, Kerala, India. This study may present an indirect assessment of the persisting effects of endosulfan in the affected areas, suggesting its long-term effects on the ecosystem.

scholarly journals Changes in Bacterial and Fungal Soil Communities in Long-Term Organic Cropping Systems

Agriculture ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 445
Author(s):  
Jessica Cuartero ◽  
Onurcan Özbolat ◽  
Virginia Sánchez-Navarro ◽  
Marcos Egea-Cortines ◽  
Raúl Zornoza ◽  
...  
Keyword(s):  
Microbial Community ◽  
Crop Yield ◽  
Soil Microbial Community ◽  
Cropping Systems ◽  
Sequencing Analysis ◽  
Soil Microbial Community Structure ◽  
Soil Microbial ◽  
Network Analyses ◽  
Organic Cultivation

Long-term organic farming aims to reduce synthetic fertilizer and pesticide use in order to sustainably produce and improve soil quality. To do this, there is a need for more information about the soil microbial community, which plays a key role in a sustainable agriculture. In this paper, we assessed the long-term effects of two organic and one conventional cropping systems on the soil microbial community structure using high-throughput sequencing analysis, as well as the link between these communities and the changes in the soil properties and crop yield. The results showed that the crop yield was similar among the three cropping systems. The microbial community changed according to cropping system. Organic cultivation with manure compost and compost tea (Org_C) showed a change in the bacterial community associated with an improved soil carbon and nutrient content. A linear discriminant analysis effect size showed different bacteria and fungi as key microorganisms for each of the three different cropping systems, for conventional systems (Conv), different microorganisms such as Nesterenkonia, Galbibacter, Gramella, Limnobacter, Pseudoalteromonas, Pantoe, and Sporobolomyces were associated with pesticides, while for Org_C and organic cultivation with manure (Org_M), other types of microorganisms were associated with organic amendments with different functions, which, in some cases, reduce soil borne pathogens. However, further investigations such as functional approaches or network analyses are need to better understand the mechanisms behind this behavior.

Tropical‐based EBPR Process: The Long‐Term Stability, Microbial Community and Its Response Towards Temperature Stress

2021 ◽  
Author(s):  
Phiak Kim Poh ◽  
Ying Hui Ong ◽  
Krithika Arumugam ◽  
Tadashi Nittami ◽  
Hak Koon Yeoh ◽  
...  
Keyword(s):  
Microbial Community ◽  
Temperature Stress ◽  
Term Stability ◽  
Long Term Stability

scholarly journals Assessing the Microbial Community and Functional Genes in a Vertical Soil Profile with Long-Term Arsenic Contamination

PLoS ONE ◽  
2012 ◽  
Vol 7 (11) ◽  
pp. e50507 ◽  
Author(s):  
Jinbo Xiong ◽  
Zhili He ◽  
Joy D. Van Nostrand ◽  
Guosheng Luo ◽  
Shuxin Tu ◽  
...  
Keyword(s):  
Microbial Community ◽  
Soil Profile ◽  
Arsenic Contamination ◽  
Functional Genes

The Resource Development of Yulin Energy and Heavy Chemical Industry Base and Re-Thinking Sustainable City Development

2012 ◽  
Vol 524-527 ◽  
pp. 3264-3268 ◽  
Author(s):  
Zhao Feng Lei ◽  
Bang Yan Li ◽  
Xu Li Lei ◽  
Lun He
Keyword(s):  
Sustainable Development ◽  
Local Environment ◽  
Living Environment ◽  
Energy Resources ◽  
City Development ◽  
Development Mode ◽  
Sustainable City ◽  
The Sustainable Development ◽  
Yulin City

Yulin City, which is rich in energy, is one of the national energy and chemical bases. But with the process of exploitation of resources, it causes serious ecological damage and has grim living environment situation in the local environment. It is in long-term about the sustainable development of city very urgent. This paper analyzes the reputation, ruin and its treatment of the development of energy resources in Yulin City, trying to explore the sustainable development mode which is suit in resource-dependent of area.

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