Earthquake, floods and changing land use history: A 200-year overview of environmental changes in Selenga River basin as indicated by n-alkanes and related proxies in sediments from shallow lakes

Martins, César C.; Adams, John; Yang, Handong; Shchetnikov, Alexander A.; Domênico, Maikon Di; Rose, Neil L.; Mackay, Anson W.

doi:10.1016/j.scitotenv.2023.162245

Cited by 7 publications

(4 citation statements)

References 79 publications

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“…The areas without desertification are mainly concentrated in the upper reaches of the Selenga River Basin, where the vegetation is dominated by forests. From 2015 to 2020, the ecological environment of the Selenga River Basin showed an improvement trend, and its land use type was primarily grassland, but its ecosystem was relatively fragile and extremely vulnerable to degradation due to climate and human activities [41]. The species richness and biomass of plants along the floodplain in the Selenga River Basin also have not fully recovered [42].…”

Section: Spatio-temporal Changes In Land Usementioning

confidence: 99%

Landscape Ecological Risk Assessment and Analysis of Influencing Factors in Selenga River Basin

Li,

Lin,

Hao

et al. 2023

Remote Sensing

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Land degradation under the influence of global warming and ecological environmental destruction due to poor land management is the main challenge facing the Mongolian Plateau, and its future ecological risk change trends and drivers are also unclear. Therefore, to address the context relevant to this challenge, planning based on measured information from land use patterns is required. Based on land use and land cover (LULC), this study evaluates the landscape ecological risk (LER) of the Selenga River Basin by calculating the landscape pattern index. The spatiotemporal pattern and influencing factors of landscape ecological risk in the Selenga River Basin from 1990 to 2040 were analyzed. According to the results of LULC analysis, forest and grassland were the primary land use types in the Selenga River Basin. The built area, forest, and cropland showed an increasing trend, while the grassland area showed a fluctuating decreasing trend. From 1990 to 2010, the comprehensive land use dynamic degree showed a trend of rising first and then falling, specifically from 0.13% in 1990 to 0.29% in 2010, and will drop to 0.06% by 2040, indicating that the range of land use change is becoming more and more stable. The landscape ecological risk assessment shows a distribution pattern of “low at the edge and high in the middle”. The landscape ecological risk index (LER) first increases and then decreases, with the peak value in 2010 (0.085). By calculating the spatial aggregation of LER and the partial correlation with climate, we found that the Moran’s I index showed an “anti-V”-shaped change trend from 1990 to 2040, and the average landscape ecological risk presents positive spatial correlation, primarily with high-value aggregation, and peaked in 2010. Precipitation had a negative correlation with landscape ecological risk controlling for temperature, while there was a positive relationship between temperature and landscape ecological risk under the influence of controlling precipitation. This study provides a scientific basis for LULC planning in the Selenga River Basin, and is of great significance for maintaining the ecological security of the Mongolian Plateau.

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Section: Spatio-temporal Changes In Land Usementioning

confidence: 99%

Landscape Ecological Risk Assessment and Analysis of Influencing Factors in Selenga River Basin

Li,

Lin,

Hao

et al. 2023

Remote Sensing

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“…Physical, chemical, and ecological processes determine and regulate the structure and function of lake ecosystems, resulting in temporal and geographical alterations in lake sediment proxies (Mills et al., 2017; Williamson et al., 2009). Previous studies focused on the temporal variability of single types of environmental proxies, such as organic matter (Martins et al., 2023), diatoms (Zhang, et al., 2018), and sediment fluxes (Kenney et al., 2022). The contents of the 11 sediment proxies in Dongting Lake demonstrated three different patterns over the past century: stability, cyclical fluctuation, and temporal increases (Figure S3).…”

Section: Discussionmentioning

confidence: 99%

“…Pulsed mutations in lake sediments are theoretically feasible rather than a hypothesis for the recording and identification of events; thus, they could offer valuable opportunities to reconstruct the magnitude, frequency, and mechanisms of past event‐related deposits (Batt et al., 2017). Research on lake sediment proxies has highlighted the timely or lagged recording of catchment natural‐dominated abrupt events (such as extreme floods, earthquakes, and fires) and their quantitative reconstruction (Gilli et al., 2013; Martins et al., 2023). Large‐scale events caused by human activities, officially documented as dam construction and afforestation, have frequently been described via sediment records (Dearing et al., 2012; Simon et al., 2023).…”

Section: Introductionmentioning

confidence: 99%

“…al., 2017;Williamson et al, 2009). Previous studies focused on the temporal variability of single types of environmental proxies, such as organic matter(Martins et al, 2023), diatoms, and sediment fluxes(Kenney et al, 2022). The contents of the 11 sedi-ment proxies in Dongting Lake demonstrated three different patterns over the past century: stability, cyclical fluctuation, and temporal F I G U R E 6 Results of RDA analysis for sediment proxies and catchment eco-environmental variables.…”

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Driver–response relationships in a large shallow lake since the Anthropocene: Short‐term abrupt perturbations versus long‐term sustainable pressures

Ran,

Wang,

Nie

et al. 2024

Global Change Biology

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Lakes, as integral social‐ecological systems, are hotspots for exploring climatic and anthropogenic impacts, with crucial pathways revealed by continuous sediment records. However, the response of multi‐proxies in large shallow lakes to typical abrupt events and sustained drivers since the Anthropocene remains unclear. Here, we explored the driver‐identification relationships between multi‐proxy peaks and natural and anthropogenic events as well as the attribution of short‐term perturbations and long‐term pressures. To this end, sediment core records, socio‐ecological data, and documented events from official records were integrated into a large shallow lake (Dongting Lake, China). Significant causal cascades and path effects (goodness‐of‐fit: 0.488; total effect: −1.10; p < .001) were observed among catchment environmental proxies, lake biogenic proxies, and mixed‐source proxies. The peak‐event identification rate (PEIR) and event‐peak driving rate were proposed, and values of 28.57%–46.43% and 50%–81.25% were obtained, respectively. The incomplete accuracy of depicting event perturbations using sediment proxies was caused by various information filters both inside and outside the lake. PEIRs for compound events were 1.41 (±0.72) and 1.09 (±0.46) times greater than those for anthropogenic‐dominated and natural‐dominated events, respectively. Furthermore, socio‐economic activity, hydrologic dynamics, land‐use changes, and agriculture exerted significant and persistent pressures, cumulatively contributing 55.3%–80.9% to alterations in sediment proxies. Relatively synergistic or antagonistic trends in temporal contributions of these forces were observed after 2000, which were primarily attributed to the “Grain for Green” project and the Three Gorges Dam. This study represents one of the few investigations to distinguish the driver–response relationship of multiple proxies in large shallow lakes under typical event perturbations and long‐term sustained pressures since the Anthropocene. The findings will help policymakers and managers address ecological perturbations triggered by climate change and human activities over long‐term periods.

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The impacts of earthquakes on air pollution and strategies for mitigation: a case study of Turkey

Zanoletti,

Bontempi

2024

Environ Sci Pollut Res

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This study delves into the repercussions of the 2023 earthquake in Turkey, particularity its impact on air pollution. A year post-event, it is evident that scientific literature has paid limited attention to monitoring the situation. However, the release of hazardous substances, such as asbestos, lead, and other toxins, from damaged structures poses a significant threat by contaminating nearby air, soil, and water sources, thereby jeopardizing ecosystems and public well-being. The improper disposal of waste post-earthquake and the presence of mining and oil refinery sites in the region contribute to potential air pollutants. These circumstances create challenging environments conducive to the spread of respiratory diseases, with potential long-term health and social consequences. Unfortunately, existing data gaps hinder a comprehensive understanding of the situation. This paper pioneers the reporting and analysis of data regarding potential sources of air pollution resulting from the earthquake in Turkey. It also pinpoints gaps in knowledge, outlining areas that demand further investigation. To effectively prevent and mitigate air pollution risks and associated health concerns linked to earthquakes, strategic recommendations are proposed. A key suggestion is the establishment of post-disaster air pollution monitoring systems capable of swiftly identifying emerging health issues, facilitating efficient responses, and curtailing potential long-term effects of the disaster. The paper underscores the necessity for continuous health monitoring of the affected population to mitigate possible adverse impacts on human health. These strategies play a pivotal role in reducing the likelihood of air pollution, supporting emergency response and recovery initiatives, and fostering new dedicated scientific studies.

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Earthquake, floods and changing land use history: A 200-year overview of environmental changes in Selenga River basin as indicated by n-alkanes and related proxies in sediments from shallow lakes

Cited by 7 publications

References 79 publications

Landscape Ecological Risk Assessment and Analysis of Influencing Factors in Selenga River Basin

Landscape Ecological Risk Assessment and Analysis of Influencing Factors in Selenga River Basin

Driver–response relationships in a large shallow lake since the Anthropocene: Short‐term abrupt perturbations versus long‐term sustainable pressures

The impacts of earthquakes on air pollution and strategies for mitigation: a case study of Turkey

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