Struktur dan Komposisi Vegetasi Mangrove di Dusun II Desa Pulau Sembilan Kecamatan Pangkalan Susu Kabupaten Langkat Sumatera Utara

Abstract

Mangrove forest ecosystem is a type of forest that are mostly located along the coast or a river that survival is affected by the tide. ecosystems mangrove in hamlet II of sembilan island has long used surrounding peoples for land aquaculture and for firewood. This research aims to determine the structure and composition of mangrove vegetation, water conditions, soil pH conditions along the substrate. This study was conducted in March 2016 to May 2016. The study was conducted with a purposive random sampling method by means of mangrove vegetation observation and measurement of water quality parameters, substrates and soil pH. Mangrove species found at the study site as many as 27 species of the A. ebracteus, A. ilicifolius A. aureum, A. cornilatum, A. floridum, A. alba, A. lanata, A.marina, A. officinalis, B. cylindrica, B. gymnorhyza, C. decandra, C.tagal, E. agallocha, L. littorea, L. racemosa, N. Fruticans, R. apiculata, R. stylosa, R. mucronata, S. hidrophidacae, S. portucastrum, S. alba, S. caseolaris, S. ovata, X. granatum, X. mollucensis. Based on ministerial decree of living environment No. 201 In 2004, the density of mangrove in Hamlet II of Sembilan Island Village included in the category of very dense (both categories). Mangrove substrate types in the study site is loam, clay, sandy clay loam clayey and sandy clay.