Inventory of mangrove forest as part of management effort in the coastal area of Deli Serdang, North Sumatra

Abstract

Abstract. Ningsih SS, Widhiastuti R, Utomo B, Guslim. 2011. Inventory of mangrove forest as part of management effort in the coastal area of Deli Serdang, North Sumatra. Bonorowo Wetlands 1: 58-69. This research aims to describe and compare the condition and management of the mangroves at the Deli Serdang regency. The research study was conducted in 9 mangrove villages in the coastal region of the Deli Serdang regency. The methods used the square line with a line 10 m x 60 m sizes by vertical sea sideways for each village. The seedlings sub size 2 m x 2 m square, the saplings sub size 5 m x 5 m square, and trees level sub sizes 10 m x 10 m. The parameter analysis was important values index, diversities index, profile diagram, the mangrove thickness, and salinities. The result showed that mangrove vegetation was dominated by Avicennia marina (api-api hitam) and followed by Excoecaria agallocha (butabuta) and Avicennia alba (api-api putih). The diverse mangroves of the coastal region Deli Serdang regency are still low. The thickness and the thinness of mangrove forests were found in Paluh Kurau (500 m) and Rugemuk (20 m), respectively. The mangroves villages with the highest canopy wide were in Karang Gading (78,99%), Tanjung Rejo (63,76%), and the lowest ones were in Paluh Sibaji (20,58%) and Rugemuk (26,43%). The highest salinity was found at sub-districts of Labuhan Deli and Hamparan Perak, while middle salinity at sub-district of Percut Sei Tuan, while of the district of Pantai Labu the salinity was from low level to middle. Based on the analysis of the vegetation closeness and canopy width, the condition of the coastal region of Deli Serdang regency mangroves was destroyed.