Microbial response and adaption to thallium contamination in soil profiles

Construction Means of Soil Microbial Synusiologic Network Based on ANN

“…Yu suggested that the atmospheric environmental quality evaluation model based on the BP network should be established, and the model should be used for atmospheric environmental quality evaluation, and the evaluation results were compared with those of fuzzy mathematics evaluation means, which showed that BP ANN was universal, reasonable, and practical [ 19 ]. She suggested that, based on regional land cover, synusiologic evaluation, wildlife protection, and other objectives, corridors and networks should be regarded as the framework of the green space synusiologic network for overall planning, and important patches should be selected as synusiologic nodes through node weight analysis, and seven different network schemes should be formed after synusiologic corridors are connected, then the network structure index of each scheme should be calculated, and finally the best scheme can be obtained by analyzing and comparing them [ 20 ]. Li suggested using the BP network model to evaluate the atmospheric environmental quality of a city and compared the evaluation results of this means with fuzzy decision, grey clustering, and comprehensive evaluation means, which proved the superiority of the BP network model in atmospheric environmental quality evaluation [ 21 ].…”

Toxic Effects of Thallium on Biological Indicators of Haplic Chernozem Health: A Case Study

“…It seems promising to continue studies of the toxic effects of Tl on the ecological state of soils in the following directions: an intensive assessment of the ecotoxicity of different doses of Tl in soils from the background concentration up to 20,000 mg/kg; to determine the toxicity of different chemical forms of Tl for soil; to study changes in soil properties under Tl pollution with dynamics (from 10 to 360 days); to study a wider range of biological indicators of soil contamination with Tl; and to investigate the joint effect of Tl polluted with complicated other pollutants in order to identify synergistic and antagonistic effects in relation to soil properties. The relationships between Tl and microbial communities in soil with different Tl-contamination levels were noted [56]. The toxic effects of Tl on soil biological properties and its accumulation in plant tissues were also observed by several researchers [16,57,58].…”

Legacy copper/nickel mine tailings potentially harbor novel iron/sulfur cycling microorganisms within highly variable communities

“…For example, calcium ( i.e., Ca in Figure 3) concentration was strongly correlated with alkalinity (measured in mg/L CaCO 3 ) (R=0.79). However, it is possible that selection for resistance to Tl and V toxicity may influence community composition (She et al, 2022; Zhang et al, 2019), as these elements are highly toxic at trace concentrations. In particular, vanadium concentrations in several samples from ML25 and ML34 far exceed the recommended safe limit for drinking water (0.05 mg/L) (Environment and Climate Change Canada, 2016) so selection for vanadium resistance mechanisms such as the reduction of V V to V IV would be relevant in these communities.…”