RAHMADANTI, KARLA LUTFIA (2023) ESTIMASI BIOMASSA DAN SIMPANAN KARBON PADA VEGETASI LAMUN DI PANTAI LEGON BAJAK PULAU KEMUJAN, TAMAN NASIONAL KARIMUNJAWA (23dik38). Undergraduate thesis, Fakultas Perikanan dan Ilmu Kelautan.

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Abstract

ABSTRAK
(Karla Lutfia Rahmadanti 26040118130190. Estimasi Biomassa dan
Simpanan Karbon pada Vegetasi Lamun di Pantai Legon Bajak Pulau Kemujan, Taman Nasional Karimunjawa.Gunawan Widi Santosa dan Rini Pramesti.)
Konsep karbon biru (blue carbon) diperkenalkan oleh The United Nations Environment Programme (UNEP), The Food and Agriulture Organization (FAO), dan United Nations Educational Scientific and Cultural Organiaztion (UNESCO) pada tahun 2009. Ekosistem pesisir dengan habitat bervegetasi seperti rawa asin, hutan mengrove dan padang lamun memiliki kemampuan menyerap dan menyimpan karbon yang dikenal dengan istilah karbon biru (blue carbon). Lamun merupakan produsen primer yang membutuhkan CO dalam proses fotosintesisnya. Vegetasi lamun berkontribusi dalam mitigasi dampak perubahan iklim. Penelitian ini berutujuan untuk mengetahui nilai biomassa lamun dan kandungan karbon pada vegetasi lamun di Pantai Legon Bajak, Taman Nasional Karimunjawa.
Penelitian dilakukan pada 28 November – 30 Desember 2021. Parameter yang diambil dalam penelitian ini adalah jenis, kerapatan, persentase penutupan, biomassa dan kandungan karbon lamun. Analisis vegetasi dilakukan menggunakan metode line transect quadrant, yang mengacu pada buku Panduan Monitoring Padang Lamun LIPI. Pengambilan sampel lamun dilakukan dengan mencuplik lamun dengan menggunakan seagrass core. Biomassa lamun terbagi menjadi bagian atas substrat (daun) dan bawah substrat (akar dan rhizoma). Nilai
biomassa lamun ditentukan melalui berat kering dari dengan cara pengeringan menggunakan oven. Nilai kandungan karbon pada lamun diperoleh melalui metode LOI (Loss of Ignition) atau pengabuan kering. Hasil penelitian diperoleh 5 jenis lamun, yaitu E. acoroides, T. hemprichii, C. rotundata, H. ovalis, dan H. uninervis . Nilai biomassa lamun bawah substrat diperoleh 2,13 – 150,95 g/m dan atas substrat adalah 2,29 – 129,63 g/m2. Nilai estimasi kandungan karbon lamun bawah substrat, yaitu 0,64 – 50,98 gC/m2 dan nilai estimasi karbon atas substrat adalah 0,93 – 42,28 gC/m2.
Kata Kunci : Karbon biru, Biomassa, Karbon, Lamun, Legon Bajak

ABSTRACT
(Karla Lutfia Rahmadanti 26040118130190. Estimation of Biomass and Carbon Storage in Seagrass Vegetation at Legon Bajak Beach, Kemujan Island, Karimunjawa National Park. Gunawan Widi Santosa dan Rini Pramesti.)
The concept of blue carbon was introduced by the United Nations
Environment Programme (UNEP), the Food and Agriculture Organization (FAO), and the United Nations Educational Scientific and Cultural Organization (UNESCO) in 2009. Coastal ecosystems with vegetated habitats such as salt marshes, mangrove forests and seagrass meadows have the ability to absorb and
store carbon, known as blue carbon. Seagrass as a primary producer requires CO in its photosynthesis. Seagrass vegetation contributes to mitigating the impacts of climate change. This study aims to determine the value of biomass and carbon content in seagrass vegetation at Legon Bajak Beach, Karimunjawa National Park. The research was conducted on November 28th - December 30th. Parameter that was collected in this study were seagrass species, density, percentage of cover, biomass and carbon content. Vegetation analysis was conducted by using the line transect quadrant method, which refers to the LIPI Seagrass Monitoring Guidebook. Seagrass sample was collected by using
seagrass core. Seagrass biomass is divided into upper substrate (leaves) and lower substrate (roots and rhizomes). The value of seagrass biomass was determined through dry weight by drying process in the oven. The value of carbon content in seagrasses is obtained through the LOI (Loss of Ignition) method or dry ignition. The results obtained 5 seagrass species, namely E. acoroides, T. hemprichii, C. rotundata, H. ovalis, and H. uninervis. The value of seagrass biomass under the substrate was 2.13 - 150.95 g/m2 and above the substrate was 2.29 - 129.63 g/m2. The estimated value of seagrass carbon content under the substrate was 0.64 - 50.98 gC/m2 and the estimated value of carbon on the substrate was 0.93 - 42.28 gC/m2
Keywords: Blue carbon, Biomass, Carbon, Seagrass, Legon Bajak

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