Morphometric Structure of Seagrass Halophila ovalis in Tongkeina, Bunaken Subdistrict, Manado City and Mokupa, Tombariri Subdistrict, Minahasa District Coastal Waters
Seagrass is vascular plant with rhizome roots system, trunk system and leafs that can be differenciated. Genesal characteristic of this family, amoy others, the leaf tend to have two branches, (and absent of) ligula as been found an Potamogetonaceae family, linier form af leaf, round, oval, sessile,...
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| Published in: | Jurnal Ilmiah Platax Vol. 4; no. 2; p. 67 |
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| Main Authors: | , , |
| Format: | Journal Article |
| Language: | English |
| Published: |
01-11-2016
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| Online Access: | Get full text |
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| Summary: | Seagrass is vascular plant with rhizome roots system, trunk system and leafs that can be differenciated. Genesal characteristic of this family, amoy others, the leaf tend to have two branches, (and absent of) ligula as been found an Potamogetonaceae family, linier form af leaf, round, oval, sessile, enlarge branch with paraleel vfinger like ciramferule connected wirb crossed lower duct or perpendicular. This study was conducted in two locations namely Tongkeina, Bunaken Subdistrict, Manado City and Mokupa, Tombariri Subdistrict, Minahasa District coastal waters. Until recently there is no study yet been done regarding the comparison on morphological size of H. ovalis based on different sample location (near mangroves, seagrass beds and coral reefs) and comparing the result of morphological measurement among the locations studied. Data collection was done by using exploratory survey method where samples are directly collected, washed with seawater and put it on plastic bag. The sampling site was determined by using GPS before collecting the sample of H. ovalis that consist of 20 individuals from each station. The samples that been washed and labeled were then put in the plastic bag with alcohol to avoid the damage on seagrass sample. The results show that H. ovalis from Mokupa village is smaller than from Tongkaina. This is possibly caused the pressure of villager in Mokupa usually having their main activity to catch fish along the coastal areas which is treatening also the life of seagrass. The discarded of both organic and non organic garbages remained from house holds and local tradiitional market also can hinder the growth of H. ovalis. Keyword : Morphometric, Halophila ovalis, Tongkaina, Mokupa Abstrak Lamun adalah tumbuhan vascular sejati, memiliki akar dengan sistem perakaran rhizoma, struktur batang dan daun yang dibedakan dengan jelas. Halophila ovalis termasuk dalam family Hydrocharitaceae. Ciri-ciri umum dari famili ini antara lain daun cenderung bercabang dua, daunnya tidak memiliki ligula seperti yang dimiliki oleh famili Potamogetonaceae, bentuk daun linier (lurus), membulat, oval, sessile atau bercabang membesar dengan jari-jari paralel yang dihubungkan dengan saluran silang menurun atau perpendikuler. Penelitian ini dilaksanakan di dua lokasi yaitu di Perairan Pantai Tongkaina Kecamatan Bunaken Kota Manado dan Pantai Desa Mokupa Kecamatan Tombariri Kabupaten Minahasa. Penelitian ini dilakukan karena belum ada data mengenai perbandingan morfometrik lamun Halophila ovalis di dua lokasi ini. Tujuan penelitian yaitu membandingkan ukuran morfologi Halophila ovalis berdasarkan stasiun pengambilan sampel (daerah dekat mangrove, Lamun, dan Terumbu Karang) dan membandingkan ukuran morfologi Halophila ovalis berdasarkan lokasi pengambilan sampel. Pengambilan data dilakukan dengan menggunakan metode survei jelajah, sampel langsung dikumpulkan, dicuci dengan air laut dan dimasukkan ke dalam kantung plastik sampel. Saat pengambilan sampel dilakukan, posisi diplot dengan menggunakan GPS dan dilanjutkan dengan pengambilan sampel lamun Halophila ovalis sebanyak 20 individu setiap stasiun, kemudian sampel lamun di cuci dan di masukan dalam plastik yang sudah di berikan lebel, dan diisi alkohol agar sampel lamun tidak rusak. Pada hasil yang di peroleh terlihat bahwa Spesies Halophila ovalis di desa Mokupa lebih kecil dibandingkan Halophila ovalis di Tongkaina. Hal ini disebabkan aktivitas masyarakat desa Mokupa dilakukan dipinggir pantai dan juga aktivitas pembuangan sampah organik. Kata Kunci : Morfrometrik, Halophila ovalis, Tongkaina, Mokupa 1Mahasiswa Manajemen Sumberdaya Perairan FPIK UNSRAT 2Staf pengajar Fakultas Perikanan dan Ilmu Kelautan Universitas Sam Ratulangi |
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| ISSN: | 2302-3589 2302-3589 |
| DOI: | 10.35800/jip.4.2.2016.14018 |