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Analysis of the Economic Value and Status of the Ecosystem Services Provided by the Ashtamudi Wetland Region, a Ramsar Site in Kerala
Journal of the Indian Society of Remote Sensing ( IF 2.2 ) Pub Date : 2020-11-21 , DOI: 10.1007/s12524-020-01263-9
Nayana Merin Joy , Saikat Kumar Paul

Wetlands provide critical services such as protection against flooding and wave action, water quality maintenance, habitat provision, food products, etc. Ashtamudi is the second-largest wetland ecosystem in Kerala state, and it provides numerous ecosystem services (ES). This study has analysed the economic value and current status of 11 important ES provided by this wetland. The considered services are fish production, clam production, shrimp/prawn larvae production, inland navigation, coir production, carbon sequestration and erosion prevention provided by mangroves, flood protection, cooling effect, tourism and future use-value. The total economic value of the wetland by considering the aforementioned services is 424 million US$ (in terms of 2017 International $ value), and every hundred square metres of the wetland provides an economic output of 820 US$ per year approximately. Even though the valuation of a few ES has been carried out in earlier studies, this particular study has incorporated more services in valuation and analysed the change in its value compared to previous years. This study also tried to analyse the status of ‘wetland features’ essential for the sustenance of ES, the spatial changes of the service providing habitats, and its impact on ES delivery. The study has been carried out in a GIS framework using inputs from various sources including remote sensing (RS) data. Landsat imageries and digital elevation model of the study area are used to understand the economic value and current status of certain services. Analysis, such as spatial change of service providing habitats, shoreline alterations, changes in NDVI of selected locations is carried out by utilizing the aforementioned RS data. Compared to the previous years, the value of supporting and regulating services is declining. At the same time, the value of certain provisioning and cultural services is improving. As the supporting and regulating services are the prerequisites for all other ES to sustain, the current trend indicates a collapse of the entire system shortly. While addressing this issue, more priority has to be given in restoring antecedent wetland condition, which will indeed lead to the improvement of supporting and regulating ES. Community-based institutional mechanisms have to be developed to ensure consistent monitoring and maintenance of the wetland.

中文翻译:

喀拉拉邦拉姆萨尔湿地阿什塔穆迪湿地地区提供的生态系统服务的经济价值和现状分析

湿地提供关键服务,例如防止洪水和波浪作用、维持水质、提供栖息地、提供食品等。 Ashtamudi 是喀拉拉邦第二大湿地生态系统,并提供众多生态系统服务 (ES)。本研究分析了该湿地提供的11个重要生态系统的经济价值和现状。考虑的服务是鱼类生产、蛤蜊生产、虾/虾幼虫生产、内陆航行、椰壳纤维生产、红树林提供的固碳和侵蚀预防、防洪、降温效果、旅游和未来使用价值。考虑到上述服务,湿地的总经济价值为 4.24 亿美元(以 2017 年国际美元价值计算),每百平方米湿地每年可提供约 820 美元的经济产出。尽管在早期的研究中已经对一些 ES 进行了估值,但这项特定的研究在估值中纳入了更多服务,并分析了其价值与前几年相比的变化。本研究还试图分析对 ES 维持必不可少的“湿地特征”的状态、提供服务的栖息地的空间变化及其对 ES 交付的影响。该研究是在 GIS 框架中进行的,使用来自各种来源的输入,包括遥感 (RS) 数据。研究区域的 Landsat 图像和数字高程模型用于了解某些服务的经济价值和现状。分析,例如提供服务的栖息地的空间变化,海岸线改变,选定位置的 NDVI 变化是通过利用上述 RS 数据进行的。与前几年相比,支持和调节服务的价值正在下降。与此同时,某些供给和文化服务的价值正在提高。由于支持和调节服务是所有其他 ES 维持的先决条件,目前的趋势表明整个系统很快就会崩溃。在解决这个问题的同时,必须更加重视恢复先行湿地条件,这确实会导致支持和调节生态系统的改善。必须发展以社区为基础的体制机制,以确保对湿地进行一致的监测和维护。与前几年相比,支持和调节服务的价值正在下降。与此同时,某些供给和文化服务的价值正在提高。由于支持和调节服务是所有其他 ES 维持的先决条件,目前的趋势表明整个系统很快就会崩溃。在解决这个问题的同时,必须更加重视恢复先行湿地条件,这确实会导致支持和调节生态系统的改善。必须发展以社区为基础的体制机制,以确保对湿地进行一致的监测和维护。与前几年相比,支持和调节服务的价值正在下降。与此同时,某些供给和文化服务的价值正在提高。由于支持和调节服务是所有其他 ES 维持的先决条件,目前的趋势表明整个系统很快就会崩溃。在解决这个问题的同时,必须更加重视恢复先行湿地条件,这确实会导致支持和调节生态系统的改善。必须发展以社区为基础的体制机制,以确保对湿地进行一致的监测和维护。由于支持和调节服务是所有其他 ES 维持的先决条件,目前的趋势表明整个系统很快就会崩溃。在解决这个问题的同时,必须更加重视恢复先行湿地条件,这确实会导致支持和调节生态系统的改善。必须发展以社区为基础的体制机制,以确保对湿地进行一致的监测和维护。由于支持和调节服务是所有其他 ES 维持的先决条件,目前的趋势表明整个系统很快就会崩溃。在解决这个问题的同时,必须更加重视恢复先行湿地条件,这确实会导致支持和调节生态系统的改善。必须发展以社区为基础的体制机制,以确保对湿地进行一致的监测和维护。
更新日期:2020-11-21
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