Salinity distribution in the mangrove area of the Sungai Gemuruh, Koto XI Tarusan District, Pesisir Selatan Regency

Abstract

Mangroves have a very important role for the ecosystem, because mangroves can prevent sea water intrusion, erosion and coastal abrasion, retain or trap sediment and play a very important role in the lives of coastal communities in managing and utilizing mangroves. The Gemuruh River Mangrove Area is in direct contact with community activities such as fishermen, merchant activities, boat crossing activities and river baths. It is feared that this can affect the quality of the environment and reduce the ecological function of mangroves, so that it is necessary to study the distribution of salinity in the mangrove areas of the roaring river around the community's activities, because salinity is one of the supporting factors for mangrove life. The sampling technique for mangrove species and salinity was carried out by using a purposive random sampling method, where there were 8 sampling points with a distance between points of about 3-5 meters. The results showed 5 types of mangroves, namely Rhizophora apiculata, Rhizophora stylosa, Bruguiera cylindrica, Nypa fruticans, Acrostichum aureum and a salinity distribution ranging from 13 ppm to 19 ppm. based on these data illustrates the salinity value that still supports mangrove development.