Ramihangihajason Tony A, Weber Jean-Louis, Rakotondraompiana Solofo, Roger Edmond, Faramalala Miadana H, Rakotoniaina Solofoarisoa
Institute and Observatory of Geophysics, Antananarivo (IOGA), University of Antananarivo, Antananarivo, Madagascar.
Department of Physics, Faculty of sciences. University of Antananarivo, Antananarivo, Madagascar.
PLoS One. 2025 May 9;20(5):e0321948. doi: 10.1371/journal.pone.0321948. eCollection 2025.
Ecosystem change affects the availability of resources and services provided by nature. Ecosystem Natural capital accounting helps track these changes and supports better decision-making for managing the environment. This approach aims to assess changes in the stocks and flows of natural resources and the possibility to integrate them into economic and political decisions. The protected area of Mahavavy-Kinkony Complex, in North-Western of Madagascar, was chosen to implement this approach due to its many types of ecosystems as well as important reserves of threatened birds. In five years (2013-2018), we have observed a reduction in woodland cover (forest and mangrove) due to both regulated and illegal logging, linked to urban expansion and increasing of human pressure. This loss of woodland compromises not only biodiversity but also the capacity of ecosystems to provide ecosystem services. At the same time, the silting up of surface waters is compromising water quality and the health of aquatic ecosystems. In addition, the increase in agricultural land at the expense of forested areas raises concerns about the continuing degradation of natural ecosystems. All of these changes can be observed inside local socio-ecological landscape type. Each socio-ecological landscape type shows the potential variation in the production of ecosystem services.
生态系统变化影响自然资源的可获取性以及自然提供的服务。生态系统自然资本核算有助于追踪这些变化，并为环境管理提供更好的决策支持。这种方法旨在评估自然资源存量和流量的变化，以及将其纳入经济和政治决策的可能性。马达加斯加西北部的马哈瓦维-金孔尼复合体保护区因其多种生态系统类型以及濒危鸟类的重要栖息地而被选为实施该方法的地点。在五年时间里（2013年至2018年），我们观察到由于与城市扩张和人类压力增加相关的合法和非法伐木，林地覆盖面积（森林和红树林）减少。林地的丧失不仅危及生物多样性，也损害了生态系统提供生态服务的能力。与此同时，地表水的淤积正在损害水质和水生生态系统的健康。此外，以森林地区为代价的农业用地增加引发了对自然生态系统持续退化的担忧。所有这些变化都可以在当地社会生态景观类型中观察到。每种社会生态景观类型都显示出生态系统服务生产的潜在差异。
