Performa Laju Sintasan dan Pertumbuhan Lamun Thalassia hemprichii dari Dua Metode Transplantasi

Abstract

Padang lamun berperan penting sebagai pendaur ulang zat hara di perairan, namun memiliki ancaman di habitatnya akibat berbagai faktor sehingga bisa hilang di suatu wilayah pesisir. Salah satu upaya untuk memulihkan padang lamun adalah transplantasi. Tujuan penelitian adalah menerapkan metode sprig anchor dan karung goni untuk transplantasi lamun Thalassia hemprichii serta mengukur laju sintasan dan pertumbuhan. Kegiatan transplantasi dilakukan pada bulan Maret-Juni di Pulau Pramuka, Kepulauan Seribu dengan dua metode yang masing-masing terdiri atas 40 bibit. Hasil persentase survival rate lamun dengan metode transplantasi sprig anchor lebih rendah (32.5%) dibandingkan metode karung goni (87.5%). Pertumbuhan panjang daun lamun T. hemprichii menggunakan metode transplantasi sprig anchor memiliki kisaran panjang 11.29 – 14.10 cm, sedangkan pada metode karung goni memiliki kisaran panjang 11.54 – 13.92 cm. Laju pertumbuhan lamun T.hemprichii menggunakan metode transplantasi sprig anchor memiliki kisaran nilai 0 - 0.58 cm/minggu, sedangkan pada metode karung goni memiliki kisaran nilai 0 - 1.14 cm/minggu.

Seagrass beds have an important role in maintaining the balance of the sea as a recycler of nutrients in the waters, but have threats to their habitat due to various factors so that they can be lost in a coastal area.. One of the efforts to restore the seagrass beds is by transplantation. The objective of this research was to apply two methods of seagrass transplantation for Thalassia hemprichii, namely sediment-free sprig anchor (sprig anchor) and sediment-filled hessian bags (hessian bags), also measure its survival and growth rate. Transplantation activities were carried out in March-June on Pramuka Island, Seribu Islands using two methods, each consisting of 40 seedlings. The percentage result of seagrass survival rate using sprig anchor transplantation method is lower (32.5%) than the burlap sack method (87.5%). The length growth of the leaves of T.hemprichii seagrass using the sprig anchor transplant method has a length range of 11.29 – 14.10 cm, while the hessian bags method has a length range of 11.54 – 13.92 cm. The growth rate of seagrass T. hemprichii using the sprig anchor transplant method has a value range of 0 - 0.58 cm/week, while the hessian bags method has a value range of 0 - 1.14 cm/week.