Abstract
The diversity of mangrove vegetation is a community that has different characteristics from other communities. Diversity is an important component in mangrove management, but so far the availability of data related to mangroves is still very minimal, including those related to the species diversity of mangrove forest vegetation in the region. This study aims to obtain data on species diversity of vegetation found in the mangrove forest area of Dusun Besar Village, Pulau Maya District, Kayong Utara Regency. Method used was a combination of path and plot method, and the determination of the location and research path location were carried out using purposive sampling. The results of observation and data analysis showed that the dominant vegetation species with the highest importance value index (INP) for seedlings, saplings and trees was the Avicennia marina, namely the INP value of seedlings 37.04%, the INP values of sapling 65.24%, and the value of INP a tree rate of 65. Based on the results of the most dominant analysis found the species of Avicennia marina with a value of C = 0.03430 for seedling, C = 0.04729 for sapling, and C = 0.04736 for tree level. The diversity of mangrove forest vegetation species in Dusun Besar Village for seedlings, saplings and trees is low because it has an H 'value <1, and the abundance of mangrove vegetation species was not evenly distributed in each forest area because it only has an e value <1.Keywords: Dusun Besar Village, Mangrove Forest, Species Diversity
Highlights
PENDAHULUAN Hutan mangrove merupakan tipe hutan yang tumbuh di daerah pasang surut yang komunitas vegetasinya bertoleransi terhadap kadar garam yang tinggi
Tingkat Pertumbuhan (Number of Mangrove Species that Found in Dusun Besar Village based on Growth Level)
Jurnal Biologi fakultas MIPA Universitas Sam Ratulangi Manado
Summary
Berdasarkan data yang tertuang pada Tabel 1, ditemukan famili yang memiliki 2 jenis antara lain famili Avicenniaceae dan Rhizophoraceae. Hal ini disebabkan famili tersebut dapat tumbuh dengan baik di tempat yang selalu dilalui pasang surut air laut, tanah berlumpur, dapat mentolerir salinitas air yang tinggi dan hempasan gelombang, selain itu famili Rhizophoraceae juga memiliki kecepatan tumbuh sangat tinggi dan daya adaptasinya sangat baik, serta jenis ini mempunyai sifat vivipar (biji sudah berkecambah pada buah yang masih menempel pada ranting). Famili yang lainnya hanya ditemukan 1 jenis saja, hal ini dikarenakan famili yang lain tidak dapat hidup dengan baik ditempat yang sering dilalui pasang surut sehingga menghambat proses pertumbuhan dan ada beberapa jenis yang dimanfaatkan masyarakat sekitar kawasan hutan mangrove, untuk jenis Bruguiera parviflora, Excoecaria agallocha, Nypa fruticans, dan Rhizophora apiculata lebih sering dimanfaatkan pohonnya, jenis Avicennia alba, Cerbera manghas, dan Sonneratia alba hidup dengan baik di pekarangan rumah warga dan pesisir sungai. Tingkat Pertumbuhan (Number of Mangrove Species that Found in Dusun Besar Village based on Growth Level)
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