Kondisi Ekologi Mangrove di Pantai Bali Desa Mesjid Lama Kecamatan Talawi Kabupaten Batu Bara Provinsi Sumatera Utara.

Abstract

Mangrove is the living plant community between the sea and the land that was influenced by the tides. Bali beach in Mesjid Lama village, Batu Bara Regency of North Sumatera had an area of mangrove forest about 635 Ha. Bali beach still had a natural mangrove ecosystem. But, the coastal has long been used by the local community as a source of livelihood especially mangrove forest logging. This research was aimed to know the ecological condition of mangrove forest and condition of the mangrove waters. This research was done in March 2014 till Mei 2014. This research was done with a purposive sampling method by taking and observation of biotic components which was mangrove vegetation and worm Nereis and the measurement of water quality parameters. Data analysis included analysis of mangrove vegetation, analysis of water quality, analysis of substrate and analysis of morfometri leaves. Mangrove species found at the research site as much as 10 kinds namely Aegiceras corniculatum, Avicennia lanata, Avicennia marina, Avicennia officinalis, Bruguiera cylindrica, Bruguiera sexangula, Ceriops tagal, Excoecaria agallocha, Rhizophora mucronata and Rhizophora stylosa. Based the decision of environmet minister number 201/2004, the mangrove density in all of the stations included in category medium and the mangrove cover included in category rarely. The condition of mangrove waters compared with the decision of environment minister number 51/2004. A kind of the substrate mangrove at the research was clay, clays and clays dusty. The highest content of tanin and nitrogen in Avicennia lanata leaves, the highest posfor contained in Rhizophora stylosa leaves. Nereis worm much found in station II. The biggest diversity index at station II.