Abstract
The decline mangroves in the Districts of Lima Puluh Pesisir, Talawi, and Tanjung Tiram is caused by the lack of knowledge and understanding of the community about the importance of mangroves for life. This study aims to determine the condition of the mangrove ecosystem in the Batu Bara District. The data collection method was carried out by conducting a location survey to determine the sampling points used as research sites by using a quadratic transect. The results of the study was found 20 types of mangroves. Based on the results of satellite imagery in 2013, there are 3 districts with a total mangrove area of 1,323.5 ha. The highest important value index (INP) for trees at station 1, Lima Puluh Pesisir District, namely the Avicennia marina type of 17.77%, Important value index (INP) at station 2 Talawi District for the highest tree, namely the Bruguiera cylindrical type of 14.45% and The important value index (INP) at station 3 of Tanjung Tiram District for the highest tree was the Avicennia marina type of 20.51%.In 2013-2022 in the District of Lima Puluh Pesisir there has been a change in the area of mangroves, namely a reduction in area of 236.84 Ha.
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