KOMPOSISI JENIS DAN KERAPATAN MANGROVE DIKAWASAN HUTAN MANGROVE DESA SRIMINOSARI KECAMATAN LABUHAN MARINGGAIKABUPATEN LAMPUNG TIMUR

RISMA, YANTI (2021) KOMPOSISI JENIS DAN KERAPATAN MANGROVE DIKAWASAN HUTAN MANGROVE DESA SRIMINOSARI KECAMATAN LABUHAN MARINGGAIKABUPATEN LAMPUNG TIMUR. Undergraduate thesis, UIN Raden Intan Lampung.

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Abstract

ABSTRAK Mangrove merupakan spesies bakau yang sanggup berkembang serta tumbuh pada kawasan pasang surut tepi laut berlumpur sehingga mampu membentuk suatu komunitas vegetasi. Mangrove mempunyai kemampuan adaptasi yang khas yaitu kemampuan terhadap adaptasi kadaroksigen (O2) yang rendah menyebabkan sistem perakaran pada mangrove sperti cakar ayam dan termasuk dalam tipe penyangga. Hadirnya hutan mangrove memiliki peran penting dalam menjaga daerah bibir pantau dari abrasi gelombang air laut agar tetap stabil.Tujuan penelitian ini yaitu untuk mengetahui komposisi jenis dan kerapatan pada kawasan hutan mangrove Desa Sriminosari Kecamatan Labuhan Maringgai Kabupaten Lampung Timur. Penelitian ini dilakukan pada bulan Januari 2021 lokasi penelitian terletak di kawasan hutan mangrove Desa Sriminosari Kecamatan Labuhan Maringgai Kabupaten Lampung Timur. Perhitungan kerapatan mangrove dilakukan dengan menggunakan penentuan garis trasek kuadrat atau jalur bantu dengan stasiun pengamatan secara (purposive sampling) yang dianggap representative mewakili kerapatan mangrove yang ada dilokasi penelitian. Sedangkan keanekaragaman mangrove menggunakan metode deskriptif yaitu dengan cara mengidentifikasi jenis-jenis mangrove yang ditemukan di lokasi penelitian. Berdasarkan hasil keanekaragaman hutan mangrove Desa Sriminosari ditemukan 3 jenis spesies mangrove yaitu Avicennia marina, Avicennia alba dan Rhizophora apiculata. Kerapatan hutan mangrove maka diperoleh hasil dari spesies Avicennia marina yaitu nilai KR sebesar 75,5%, nilai FR 75,5% dan nilai DR 0,025%. Sedangkan spesies Rhizopora apiculata untuk nilai KR 0,05%, nilai FR 24,4% dan nilai DR 99,97%. Untuk nilai INP spesies Avicennia marina sebesar 151,13 sedangkan spesies Rhizopora apiculata nilai INP sebesar148,86. Untuk hasil H’ dalam perhitungan indeks nilai penting kawasan hutan mangrove Desa Sriminosari Kecamatan Labuhan Maringgai Kabupaten Lampung Timur sebesar 1,2 yang menunjukan bahwa keanekaragama tingkat mangrove tergolong dalam kategori sedang. Kata Kunci : Mangrove, Keanekaragaman Jenis, Kerapatan. iiABSTRACT Mangroves are mangrove species that can develop and grow in muddy seaside tidal areas so that they are able to form a vegetation community. Mangroves have a distinctive adaptability, namely the ability to adapt to low oxygen (O2) levels causing the root system in mangroves to look like chicken claws and is included in the buffer type. The presence of mangrove forests has an important role in keeping the monitoring lip area from abrasion of sea water waves in order to remain stable. The purpose of this study was to determine the species composition and density in the mangrove forest area of Sriminosari Village, Labuhan Maringgai District, East Lampung Regency. This research was conducted in January 2021, the research location is located in the mangrove forest area of Sriminosari Village, Labuhan Maringgai District, East Lampung Regency. The calculation of mangrove density is carried out using the determination of the quadratic track line or auxiliary line with purposive sampling stations which are considered representative of the mangrove density in the research location. While the diversity of mangroves uses a descriptive method, namely by identifying the types of mangroves found in the research location. Based on the results of the diversity of mangrove forests in Sriminosari Village, 3 types of mangrove species were found, namely Avicennia marina, Avicennia alba and Rhizophora apiculata. The density of mangrove forests is obtained from the Avicennia marina species, namely the KR value of 75.5%, the FR value of 75.5% and the DR value of 0.025%. While the Rhizopora apiculata species for 0.05% KR value, 24.4% FR value and 99.97% DR value. The INP value for Avicennia marina species is 151.13 while the INP value for Rhizopora apiculata is 148.86. For the results of H' in the calculation of the important value index of the mangrove forest area of Sriminosari Village, Labuhan Maringgai District, East Lampung Regency, 1.2 which indicates that the mangrove diversity is classified in the medium category. Keywords: Mangrove, Species Diversity, Density.

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