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ABSTRAK
NURUL ANDRIFA NASUTION. Hubungan Kerapatan Mangrove terhadap Kepadatan Moluska di Dusun II Desa Pulau Sembilan, Kecamatan Pangkalan Susu, Kabupaten Langkat, Provinsi Sumatera Utara. Di bawah bimbingan YUNASFI dan AHMAD M RANGKUTI.
Mangrove berperan sebagai habitat bagi organisme yang terdapat di dalamnya, salah satunya ialah Moluska. Kelimpahan dan keragaman Moluska, sangat bergantung pada daya toleransinya terhadap perubahan lingkungan. Penelitian ini bertujuan untuk menelaah kepadatan Moluska dan bagaimana hubungannya terhadap kerapatan mangrove yang terdapat di Pulau Sembilan. Penelitian ini dilakukan pada bulan Maret sampai Mei 2016. Penelitian menggunakan metode Purposive Random Sampling dengan cara pengambilan dan pengamatan vegetasi mangrove dan kepadatan Moluska, serta pengukuran parameter kualitas air. Analisis data meliputi, analisis vegetasi mangrove, analisis Moluska, analisis kualitas air dan analisis substrat. Ditemukan 9 spesies Moluska di lokasi penelitian yaitu N. balteata memiliki komposisi tertinggi sebesar 32%.
C. capucinus 25%, C. cingulata 24%, L. melanostoma 7%, L. scabra 4%. C.
obtusa dan T. telescopium memiliki komposisi yang sama yaitu sebesar 3%. N.
dorsatus 2% dan P. cochlidium 0%. Hubungan antara kerapatan spesies mangrove
terhadap kepadatan Moluska di Pulau Sembilan ditunjukkan dengan persamaan y = 0,022x - 59,77 dengan R2 sebesar 0,851 dan r = 0,922. Dari hasil analisis uji Anova diperoleh nilai F hitungnya sebesar 548,318 dan F Tabelnya sebesar 7,708 nilai signifikan sebesar 0,00001 (p < 0,05).
Kata Kunci : mangrove, Moluska, keragaman jenis
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ABSTRACT
NURUL ANDRIFA NASUTION. A Relationship between Density of Mangrove to Density of Molluscs in the Village of Pulau Sembilan District of Pangkalan Susu, Langkat, Province of North Sumatra. Under academic supervision by YUNASFI and AHMAD M RANGKUTI.
Mangroves serve as a habitat for organisms that are present in it, one of which is Molluscs. The abundance and diversity of molluscs are very dependent on the power of tolerance to environmental changes. This research was aimed to analyze density of Molluscs and how a relation with density of mangrove in the Village of Pulau Sembilan. This research is done in Maret to April 2016. The study used purposive random sampling method by taking and observation of mangrove vegetation and density of molluscs and measurement of water quality parameters. Data analysis included analysis of mangrove vegetation, analysis of Molluscs, analysis of water quality and analysis of the substrate. Found 9 species of Molluscs at the research site are Nerita balteata has the highest composition of 32%. Chicoreus capucinus 25%, Cerithideacingulata 24%, Littorina
melanostoma 7%, Littorina scabra 4%, Cerithidea obtusa and Telescopium
telescopium have the same compsition that is equal to 3%. Nassarius dorsatus
2% and Pugilina cochilidium 0%.The relationship between the density of mangrove species to the density of Molluscs in Pulau Sembilan indicated by the equation y = 0,022x - 59.77 with R 2 of 0.851 and r = 0.922.From the analysis ANOVA test counted the F value of 548.318 and F table is of significant value of 0.00001 7.708 (p <0.05).
Keywords: mangrove, Molluscs, diversity
