EVALUATION OF MANGROVE AND ITS ROLE IN THE ECONOMY AND STRATEGY TO CLIMATE CHANGE: CASE STUDY OF CUIARANA, PARÁ, IN THE BRAZILIAN AMAZON

ABSTRACT This research aimed to estimate the seasonal economic value of ecosystem goods and services from research on the use of mangroves in the Cuiarana community in the Eastern Amazon. The methodology of Total Economic Value was used, through interviews with 15 residents who extract products from the mangrove. For the ecosystem services, atmospheric carbon (measured by a micrometeorological tower), and organic carbon (monitored by soil sampling during 2017) were used. In determining product values, the quantities extracted at market prices and the value of services were estimated using carbon credits. The results indicate that the ecosystem produces 9 community assets, that generate R$ 75,033.50 (US$ 23,622.93 ha/year) and R$ 17,627.15 (US$ 5,549.58 ha/year) for capture and storage respectively. The VET value corresponded to R$ 986,132.50 (US$ 310,465.79). Ecosystem services and the economic values of atmospheric (p = 0.0278) and soil carbon credit (p = 0.0354) indicated higher importance in the rainy season due to the precipitation that favored an increase in the amount of carbon. This behavior was verified by the Principal Components Analysis (50.1%), which showed that in the less rainy season goods are more important when compared to the ecosystem services.

摘要 本研究旨在通过对亚马逊东部库阿拉纳（Cuiarana）社区红树林利用现状的调研，估算该生态系统产品与服务的季节经济价值。本研究采用总经济价值（Total Economic Value）分析框架，对15名红树林林产品采集居民开展访谈。在生态系统服务价值核算环节，本研究采用大气碳（通过微气象塔（micrometeorological tower）实测）与有机碳（2017年通过土壤采样监测）两类数据开展分析。在核算林产品价值时，研究人员以市场价格计算采集量，并通过碳信用（carbon credits）估算服务价值。研究结果显示，该生态系统可提供9项社区生态资产，其碳捕获与碳储存的年单位价值分别为75033.50雷亚尔（合23622.93美元/公顷）与17627.15雷亚尔（合5549.58美元/公顷）。本次研究的总经济价值（VET）达986132.50雷亚尔（合310465.79美元）。生态系统服务以及大气碳（p=0.0278）、土壤碳信用（p=0.0354）的经济价值分析结果均显示：受降水促进碳储量提升的影响，雨季时上述要素的重要性显著更高。主成分分析（Principal Components Analysis，方差解释率达50.1%）验证了这一规律：在降水偏少的季节，生态系统产品的重要性显著高于生态系统服务。