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Ekosistem Lamun sebagai Bioindikator Lingkungan di P. Lembeh, Bitung, Sulawesi Utara Rustam, Agustin; Kepel, Terry L.; Kusumaningtyas, Mariska A.; Ati, Restu Nur Afi; Daulat, August; Suryono, Devi D.; Sudirman, Nasir; Rahayu, Yusmiana P.; Mangindaan, Peter; Heriati, Aida; Hutahaean, Andreas A.
JURNAL BIOLOGI INDONESIA Vol 11, No 2 (2015): JURNAL BIOLOGI INDONESIA
Publisher : Perhimpunan Biologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jbi.v11i2.2197

Abstract

ABSTRACTSeagrass ecosystem has a function of spawning, nursery, and feeding ground. Besides, it could be used as a bio-indicator of environmental health. This study of seagrass ecosystem was done in 17- 22 May 2014 in Lembeh Island and Tanjung Merah, Bitung. The purpose of the study is to obtain existing condition of seagrass ecosystem and its role as environment bio-indicator. Purposive sampling method was used representing all study sites. Structure analysis of seagrass communities describes the existing condition, while scoring / weighting method estimate current condition of the seagrass. Results that show there are seven species of seagrass. In the stations opposite to Bitung mainland, 75% of the seagrass are Enhalus acoroides (10-50% covers). Importance value index of the seagrass species were Enhalus acoroides (231–300 %), Thalassia hemprichii ( 102–198 %) and Halophila ovalis (110 %) respectively. Based on the weighting method and environmental standard quality, seagrass ecosystem in Lembeh island opposite to Bitung mainland was in damage and unhealthy condition, while seagrass ecosystem opposite to the open sea was in a good and healthy condition. This was due to the domestic waste that is trapped in seagrass ecosystem in the study site. It is necessary to improve awareness to maintain quality of environmental.  Keywords: seagrass, existing, bioindicator, Lembeh Island 
Ekologi dan Struktur Komunitas Lamun di Teluk Ratatotok, Minahasa Tenggara, Sulawesi Utara Kusumaningtyas, Mariska A.; Rustam, Agustin; Kepel, Terry L.; Afi Ati, Restu Nur; Daulat, August; Mangindaan, Peter; Hutahaean, Andreas A.
Jurnal Segara Vol 12, No 1 (2016): April
Publisher : Pusat Riset Kelautan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1683.985 KB) | DOI: 10.15578/segara.v12i1.6451

Abstract

Penelitian mengenai ekologi dan struktur komunitas lamun ini dilakukan tanggal 10 – 15 Juni 2013 di perairan pesisir Teluk Ratatotok, Minahasa Tenggara. Metode penelitian dilakukan secara purposive sampling terkait dengan keberadaan lamun. Penelitian yang dilakukan meliputi pengukuran prosentase tutupan lamun, kerapatan, struktur komunitas, dan kondisi lingkungan di lokasi penelitian. Terdapat tujuh jenis lamun yang terdiri dari dua famili. Famili Hydrocharitaceae ditemukan tiga jenis lamun yaitu Enhalus acoroides (Ea), Thalassia hemprichii (Th) dan Halophila ovalis (Ho). Empat jenis lamun dari famili Cymodoceaceae yaitu Cymodocea serrulata (Cs), Cymodocea rotundata (Cr), Halodule pinifolia (Hp), dan Syringodium isoetifolium (Si). Kisaran prosentase penutupan rata-rata antara 22,5% - 89,5%. Kerapatan lamun perstasiun berkisar antara 17 – 473 ind/m2, dengan kerapatan tertinggi lamun jenis Ho sebesar 473 ind/m2 di stasiun 6. Nilai INP tertinggi pada lamun jenis Ea sebesar 128% diikuti berturut-turut oleh Si (41%), Th (36%), Ho (27%), Cs (26%), Cr (24%) dan Hp (17%). Berdasarkan kriteria status kondisi padang lamun (Kepmen LH no 200 tahun 2004), kondisi padang lamun di Teluk Ratatotok antara rusak/miskin sampai dengan baik/sehat. Stasiun 5 kondisi rusak/miskin, stasiun 3 dan 4 kondisi rusak/kurang sehat dan tiga stasiun kondisi baik/sehat yaitu stasiun 1, 2 dan 6. Secara keseluruhan kondisi lingkungaan Teluk Ratatotok masih mendukung pertumbuhan lamun.
EKOSISTEM LAMUN SEBAGAI BIOINDIKATOR LINGKUNGAN DI P. LEMBEH, BITUNG, SULAWESI UTARA Rustam, Agustin; Kepel, Terry L.; Kusumaningtyas, Mariska A.; Ati, Restu Nur Afi; Daulat, August; Suryono, Devi D.; Sudirman, Nasir; Rahayu, Yusmiana P.; Mangindaan, Peter; Heriati, Aida; Hutahaean, Andreas A.
JURNAL BIOLOGI INDONESIA Vol 11, No 2 (2015): JURNAL BIOLOGI INDONESIA
Publisher : Perhimpunan Biologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jbi.v11i2.2197

Abstract

ABSTRACTSeagrass ecosystem has a function of spawning, nursery, and feeding ground. Besides, it could be used as a bio-indicator of environmental health. This study of seagrass ecosystem was done in 17- 22 May 2014 in Lembeh Island and Tanjung Merah, Bitung. The purpose of the study is to obtain existing condition of seagrass ecosystem and its role as environment bio-indicator. Purposive sampling method was used representing all study sites. Structure analysis of seagrass communities describes the existing condition, while scoring / weighting method estimate current condition of the seagrass. Results that show there are seven species of seagrass. In the stations opposite to Bitung mainland, 75% of the seagrass are Enhalus acoroides (10-50% covers). Importance value index of the seagrass species were Enhalus acoroides (231?300 %), Thalassia hemprichii ( 102?198 %) and Halophila ovalis (110 %) respectively. Based on the weighting method and environmental standard quality, seagrass ecosystem in Lembeh island opposite to Bitung mainland was in damage and unhealthy condition, while seagrass ecosystem opposite to the open sea was in a good and healthy condition. This was due to the domestic waste that is trapped in seagrass ecosystem in the study site. It is necessary to improve awareness to maintain quality of environmental.  Keywords: seagrass, existing, bioindicator, Lembeh Island