Scholarlink

<p>Aquatic insects are useful bioindicators for measuring the ecological health of freshwater ecosystems because of their sensitivity to environmental changes and pollution levels. The present study was aimed at the seasonal distribution of aquatic entomofauna in Man Sagar Lake, Jaipur, Rajasthan, India, and their use in biomonitoring of water quality varying seasonal and climatic conditions. Sampling was conducted fortnightly for four months in each season (monsoon, winter, and summer) during 2021–2023 and recorded assemblages of entomofaunal orders, Odonata, Hemiptera, Coleoptera, and Diptera. Biological indicators including the Biological Monitoring Working Party (BMWP), Average Score Per Taxon (ASPT), and Family Biotic Index (FBI) were used to assess water quality and organic pollution levels. Multivariate analysis, including Principal Component Analysis (PCA), Canonical Correspondence Analysis (CCA), and Hierarchical Cluster Analysis (HCA), revealed significant seasonal shifts and correlations between environmental parameters (temperature, humidity, rainfall) and entomofaunal assemblages. PCA and CCA biplots showed monsoon clustering with high BMWP and ASPT values favoring pollution-sensitive taxa (Odonata), which are known to be sensitive to organic pollutants and anthropogenic disturbance, while winter was linked to high FBI scores and Diptera, suggesting ecological stress. Summer showed less distinct patterns, correlating with Hemiptera adapted to warmer, wind velocity and stagnant conditions. Correlation matrix analysis confirmed these associations where temperature showed strong positive correlation with Hemiptera (<i>r</i> = 0.92 to 1.00) and Coleoptera (<i>r</i> = 0.67 to 0.87), and strong negative correlation with Diptera (<i>r</i> = − 0.98 to − 0.99) affirming its seasonal influence. Rainfall was significantly correlated with BMWP (<i>r</i> = 1.00) and ASPT (<i>r</i> = 0.96), indicating higher scores and thus improved water quality during the monsoon season. Thus, study validated the use of aquatic entomofauna as reliable bioindicators of seasonal water quality variation of the studied artificial lake (Man Sagar Lake), emphasizing their significance in biological monitoring for the urban freshwater management. The findings supported incorporating insect-based bioassessment into ecological health monitoring and pollution reduction strategies.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Seasonal dynamics and biomonitoring role of aquatic entomofauna in an Indian artificial lake

  • 期刊论文

  • 发表日期：

    2026年1月27日

查看全文
  • Anamika,
  • Vinod Kumari,
  • Shashi Meena

摘要

Aquatic insects are useful bioindicators for measuring the ecological health of freshwater ecosystems because of their sensitivity to environmental changes and pollution levels. The present study was aimed at the seasonal distribution of aquatic entomofauna in Man Sagar Lake, Jaipur, Rajasthan, India, and their use in biomonitoring of water quality varying seasonal and climatic conditions. Sampling was conducted fortnightly for four months in each season (monsoon, winter, and summer) during 2021–2023 and recorded assemblages of entomofaunal orders, Odonata, Hemiptera, Coleoptera, and Diptera. Biological indicators including the Biological Monitoring Working Party (BMWP), Average Score Per Taxon (ASPT), and Family Biotic Index (FBI) were used to assess water quality and organic pollution levels. Multivariate analysis, including Principal Component Analysis (PCA), Canonical Correspondence Analysis (CCA), and Hierarchical Cluster Analysis (HCA), revealed significant seasonal shifts and correlations between environmental parameters (temperature, humidity, rainfall) and entomofaunal assemblages. PCA and CCA biplots showed monsoon clustering with high BMWP and ASPT values favoring pollution-sensitive taxa (Odonata), which are known to be sensitive to organic pollutants and anthropogenic disturbance, while winter was linked to high FBI scores and Diptera, suggesting ecological stress. Summer showed less distinct patterns, correlating with Hemiptera adapted to warmer, wind velocity and stagnant conditions. Correlation matrix analysis confirmed these associations where temperature showed strong positive correlation with Hemiptera (r = 0.92 to 1.00) and Coleoptera (r = 0.67 to 0.87), and strong negative correlation with Diptera (r = − 0.98 to − 0.99) affirming its seasonal influence. Rainfall was significantly correlated with BMWP (r = 1.00) and ASPT (r = 0.96), indicating higher scores and thus improved water quality during the monsoon season. Thus, study validated the use of aquatic entomofauna as reliable bioindicators of seasonal water quality variation of the studied artificial lake (Man Sagar Lake), emphasizing their significance in biological monitoring for the urban freshwater management. The findings supported incorporating insect-based bioassessment into ecological health monitoring and pollution reduction strategies.