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<p>The wetlands within the Kolkata Metropolitan Area (KMA) are vital components of the ecosystem, offering crucial benefits such as flood prevention, hydrological cycle maintenance, natural hazard protection, weather control, and ecological restoration. Deplorably, the haphazard development and human activities in the city pose a constant threat to the wetlands, endangering the reduction of ecosystem services (ESs). Therefore, this study aims to assess the economic valuation and perception of surrounding residents regarding wetland ESs in the Kolkata Metropolitan Area (KMA). Ecosystem service valuation (ESV) and importance-performance analysis (IPA) were employed to analyze the impact, and the data collected from land use land cover (LULC) studies and field surveys, which involved 384 randomly selected participants. Various statistical techniques were performed to evaluate the gathered information. The findings of the study indicated that water supply was the most significant contributor to ESs, followed by water regulation, waste treatment, disturbance regulation, and cultural services. The total value of ESs provided by the wetlands exhibited an overall reduction from $6,635,655 in 1996 to $4,353,921 in 2008, and further decreased to $3,469,167 in 2020, representing rates of change -34.38% and -20.32%, respectively. The IPA results revealed that the highest level of discrepancy was observed in water supply, followed by disturbance regulation, culture, and climate regulation, while the lowest level of discrepancy was found in raw materials, genetic resources, food production, and pollination. The study emphasized the high prioritizing water supply, climate regulation, disturbance regulation, habitat/refugia, and culture, with importance indices ranging from 0.756 to 0.878. Both the actual ESV and the residents' perceptions regarding the 17 ESs demonstrated almost similar outcomes. Therefore, this study provides a foundation for future research in similar geographic conditions, aiming to effectively manage the present and future wetland ecosystem services in a sustainable manner.</p>

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Assessing the Role of Wetlands in Ecosystem Services: A Valuation and Importance-Performance Analysis in Kolkata Metropolitan Area

  • 期刊论文

  • 发表日期：

    2025年12月12日

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  • Sk Mohibul,
  • Ahmed Ali Bindajam,
  • Hoang Thi Hang,
  • Md Nawaj Sarif,
  • Neha Parveen,
  • Lubna Siddiqui

摘要

The wetlands within the Kolkata Metropolitan Area (KMA) are vital components of the ecosystem, offering crucial benefits such as flood prevention, hydrological cycle maintenance, natural hazard protection, weather control, and ecological restoration. Deplorably, the haphazard development and human activities in the city pose a constant threat to the wetlands, endangering the reduction of ecosystem services (ESs). Therefore, this study aims to assess the economic valuation and perception of surrounding residents regarding wetland ESs in the Kolkata Metropolitan Area (KMA). Ecosystem service valuation (ESV) and importance-performance analysis (IPA) were employed to analyze the impact, and the data collected from land use land cover (LULC) studies and field surveys, which involved 384 randomly selected participants. Various statistical techniques were performed to evaluate the gathered information. The findings of the study indicated that water supply was the most significant contributor to ESs, followed by water regulation, waste treatment, disturbance regulation, and cultural services. The total value of ESs provided by the wetlands exhibited an overall reduction from $6,635,655 in 1996 to $4,353,921 in 2008, and further decreased to $3,469,167 in 2020, representing rates of change -34.38% and -20.32%, respectively. The IPA results revealed that the highest level of discrepancy was observed in water supply, followed by disturbance regulation, culture, and climate regulation, while the lowest level of discrepancy was found in raw materials, genetic resources, food production, and pollination. The study emphasized the high prioritizing water supply, climate regulation, disturbance regulation, habitat/refugia, and culture, with importance indices ranging from 0.756 to 0.878. Both the actual ESV and the residents' perceptions regarding the 17 ESs demonstrated almost similar outcomes. Therefore, this study provides a foundation for future research in similar geographic conditions, aiming to effectively manage the present and future wetland ecosystem services in a sustainable manner.