Update Artikelilmiah: 7317

BUDI MULYANA, S.Hut

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Abstrak (Bhs. Indonesia)

Alih fungsi hutan mangrove menjadi tambak mengalami peningkatan yang sangat tajam pada kurun waktu 1980-2000, sehinggarestorasi tambak yang terlantar perlu dilaksanakan melalui pendekatan sistemsilvofishery untuk memulihkan fungsi dari ekosistem mangrove.Penelitian bertujuan untuk mengetahui kadar logam berat Kadmium (Cd) di tambaksilvofishery dan non-silvofishery, struktur komunitas hutan mangrove, persepsi masyarakat dalam kegiatan restorasi, dan hubungan antarvariabel tersebut.Sampel kadar Cd yang diteliti berasal dari air, tanah, dan daunRhizophora mucronata kemudian dianalisis dengan menggunakan Atomic Absorption Spectrophotometer. Struktur komunitas hutan mangrove diperoleh melalui metode kuadrat untuk mengetahuikondisi jumlah jenis, kerapatan, dan pola distribusi. Responden untuk kuisioner persepsi masyarakat berjumlah 30 orang.Hasil penelitianmenunjukkan bahwa kondisi kadar Cd pada tambak silvofishery (0,063 ppb di air, 22,702 ppb di tanah, dan 16,586 ppb di daun) lebih rendah dibandingkan pada tambak non-silvofishery (0,210 ppb di air dan 129,376 ppb di tanah) karena tumbuhan mangrove dapat menyerap dan menyimpan Cd yang berada di lingkungan melalui proses ameliorasi.Jenis mangrove di tambak terdiri dari Rhizophora mucronata dan Bruguiera gymnorrhiza, dengan kerapatan Rhizophora mucronata lebih tinggi dibandingkan Bruguiera gymnorrhiza. Pola distribusi Rhizophora mucronata di tambak silvofishery adalah acak karena tambak silvofishery cenderung termasuk kategori normal. Sebaliknya, tambak non-silvofishery tidak memiliki tumbuhan mangrove. Persepsi masyarakat sekitar tambak penelitian dalam kegiatan restorasi tambak silvofishery termasuk baik-sangat baik karena masyarakat memahami dengan baik upaya restorasi ekosistem mangrove di tambak, sedangkan persepsi masyarakat tentang tambak non-silvofishery termasuk kurang baik. Secara umum, kadar Cd di tambak silvofishery rendah dengan kecenderungan menurun karena keberadaan proses akumulasi Cd dari air ke tanah kemudian daun, sehingga persepsi masyarakatnya termasuk baik-sangat baik, sedangkan kadar Cd di tambak non-silvofishery tinggi dan kecenderungannya meningkat, sehingga persepsi masyarakat termasuk kurang baik.

Abtrak (Bhs. Inggris)

The function of mangrove forests has changed into fishponds and the change increased rapidly in 1980-2000. Consequently, there are many abandoned fishponds that need for restoration by a silvofishery system to recover the mangrove ecosystem. This research is aimed at finding the concentration of Cadmium (Cd) in silvofishery and non-silvofishery ponds, analysis the community structure of the mangrove forest, analysis the society perception towards the restoration and to analysis the correlation between those variabels. The sample of Cd is taken from the water, soil, and Rhizophora mucronata leaves and then they are analysed by Atomic Absorption Spectrophotometer. On the other hand, the community structure of the mangrove forest is calculated by a squares method to know the species richness, the density, and the distribution pattern. In addition, there are 30 respondents who fill in the questionnaire of society perception. The result shows that the cocentration of Cd in silvofishery pond (0.063 ppb in the waters, 22.702 ppb in the soil, and 16.586 ppb in the leaves) is lower than the Cd concentration in non-silvofishery pond (0.210 ppb in the waters, 129.376 ppb in the soil). This is because mangrove can absorb and sink the Cd by the process of amelioration. The species richness are Rhizophora mucronata and Bruguiera gymnorrhiza, and the density of Rhizophora mucronata is higher than Bruguiera gymnorrhiza. Then, there is a random distribution pattern of Rhizophora mucronata in the silvofishery pond since the pond is in the category of normal, whereas the non-silvofishery pond has no mangroves. Next, there is a good to very good perception from the society who live around the silvofishery areas and this is because they understand that the restoration can save the mangrove ecosystem, whereas the people living in the non-silvofishery areas give less good perception. In general, the Cd concentration in the silvofishery pond is low and tends to get lower because there is a process of Cd accumulation from the water to the soil and the leaves, and thus the society perception is good to very good; and, conversely, the Cd concentration in the non-silvofishery pond is high and tends to be higher and this makes the society give less perception.

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