Synthesis of dynamic and eco-screening approaches in modeling for ecological risk assessment

2019 ◽  
pp. 68-81 ◽  
Author(s):  
Natalia V. Solovjova
Keyword(s):  
Ecological Risk ◽  
Dynamic Models ◽  
Climatic Factors ◽  
Main Idea ◽  
Ecological Systems ◽  
Risk Assessments ◽  
Annual Variations ◽  
Combined Action ◽  
Ecosystem State ◽  
Screening Approaches

The paper proposes a method of mathematical modeling and assessment of ecological risk for marine ecological systems under the combined action of natural, anthropogenic and climatic factors. The method is based on the use of observational data, dynamic models of ecosystem state and probabilistic ecoscreening risk assessments. The main idea and novelty of the method is to take into account the annual variations of ecological risk and substantiates the primacy of determining the magnitude of the allowable risk of ecological systems, and then the allowable intensity of anthropogenic impact. Calculations using the proposed method makes it possible to get answers to questions about the principle of the admissibility of accidents of certain scales. The use of the proposed method for specific ecosystems will help to harmonize ecological and economic requirements to ensure the ecological safety of the development of shelf resources.

Ecological risk assessment for the ecosystem of the Caspian shelf on the basis of modeling

2020 ◽  
pp. 21-37
Author(s):  
Natalia V. Solovjova
Keyword(s):  
Ecological Risk ◽  
Environmental Risk ◽  
Anthropogenic Impacts ◽  
Water Area ◽  
Risk Assessments ◽  
Anthropogenic Pressure ◽  
Oil Resources ◽  
Caspian Water ◽  
Combined Action ◽  
Acceptable Probability

Based on ecoscreening models, results of dynamic (ecosystem) modeling and field observations, environmental risk assessments for the Northern Caspian ecosystem were calculated. The proposed method is effective in assessing the risk from the combined action of natural, anthropogenic, and invasive factors in the development of oil resources in offshore waters. Calculations of ecological risk and the acceptable probability of impact for the ecosystem were carried out for three frequency ranges of anthropogenic impacts such as "technical system accidents" during the spring phytoplankton outbreak, taking into account the natural and low illumination of the Northern Caspian water area. The results obtained for spring and summer-autumn maxima of phytoplankton biomass of various durations revealed ranges of practically safe, with a probability of acceptable impact from 80 to 100%, ecosystem conditions, and extremely dangerous, with a probability of acceptable impact less than 5%. The results obtained showed that conclusions about ecosystem vulnerability in conditions of intense anthropogenic pressure are not trivial and that it is necessary first to calculate the environmental risk and then evaluate the acceptable probability of impact. The proposed approach is important for overcoming difficulties in the practical harmonization of environmental and economic requirements for the safe development of shelf resources.

scholarly journals Ecological risk assessments of endocrine disrupting organotin compounds using marine neogastropods in Hong Kong

Chemosphere ◽  
2006 ◽  
Vol 65 (6) ◽  
pp. 922-938 ◽  
Author(s):  
Kenneth M.Y. Leung ◽  
Rita P.Y. Kwong ◽  
W.C. Ng ◽  
Toshihiro Horiguchi ◽  
J.W. Qiu ◽  
...  
Keyword(s):  
Hong Kong ◽  
Ecological Risk ◽  
Organotin Compounds ◽  
Risk Assessments ◽  
Endocrine Disrupting ◽  
Ecological Risk Assessments

scholarly journals Selecting Bioassay Test Species at the Screening Level of Soil Ecological Risk Assessments

2021 ◽  
Vol 11 (9) ◽  
pp. 4314
Author(s):  
Dokyung Kim ◽  
Tae-Yang Lee ◽  
Lia Kim ◽  
Rongxue Cui ◽  
Jin Il Kwak ◽  
...  
Keyword(s):  
Ecological Risk ◽  
Risk Index ◽  
Correlation Coefficients ◽  
Economic Cost ◽  
Risk Assessments ◽  
Test Species ◽  
Representative Species ◽  
Field Soils ◽  
Bioassay Test ◽  
Ecological Risk Assessments

For site-specific soil ecological risk assessments (SERAs), an integrated chemical, ecotoxicological, and ecological analysis needs to be performed. The SERA guidelines of international institutions and countries recommend that a SERA be initiated at the screening level to save time and social economic cost; however, they provide no unified test species for this screening level. This study performed SERAs for field soils and confirmed the importance of selecting bioassay test species that reflect the ecotoxicity of field soils at the screening level. To confirm test species that reflect the ecological risk of field soils, correlation analysis was performed on the results of each bioassay with the integrated ecotoxicological risk index (EtoxRI). Our results showed that soil algae, nematodes, and plants were the most representative species in soil assays, with high correlation coefficients with EtoxRI. The results imply the importance of selecting test species that represent ecological risk for the screening level of SERAs. Based on these findings, when using SERAs, species sensitivity, ecological relevance, and economic aspects should be considered when selecting the bioassay test species.

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