Electronic Theses and Dissertation

Hama merupakan organisme yang menghambat pertumbuhan dan perkembangan pada mangrove, keberadaan jenis hama yang banyak dapat menurunkan kualitas dan kuantitas pada mangrove. wilayah rehabilitasi rhizophora sp yang telah di survei banyak mengalami kematian akibat hama, apabila dibiarkan secara terus menerus akan mereduksi keanekaragaman spesies tumbuhan yang memiliki peran dan fungsi utama secara ekologis dan potensial untuk dimanfaatkan secara ekonomi sehingga harus diperbaiki. tujuan penelitian ini adalah untuk menganalisis jenis-jenis hama dan struktur komunitas hama penyebab kerusakan pada vegetasi mangrove di wilayah aceh besar dan banda aceh. pengambilan data semai dan hama menggunakan transek kuadrat 4m x 2m. terdapat 4 jenis hama yang ditemukan yaitu balanus amphitrite, pangodiella sp., prociphilus tessellatus, dan littoraria scabra. struktur komunitas hama pada stasiun penelitian menunjukkan nilai keanekaragaman tergolong rendah, nilai keseragaman populasi sedang, dan dominansi mendekati 1 yang menunjukkan ada spesies yang mendominasi yaitu balanus amphitrite. persentase serangan hama terhadap vegetasi rhizophora sp. di ketiga stasiun dikategorikan ringan sedangkan intensitas serangan paling tinggi terdapat pada stasiun ii dengan kategori sedang. terdapat hubungan yang signifikan antara keong dengan kerapatan mangrove di stasiun ii dimana p sig < 0,05 dengan korelasi sangat kuat sebesar 0,998 artinya kerapatan atau kepadatan mangrove sangat berpengaruh akan keberadaan hama littoraria scabra. kata kunci : struktur komunitas hama, rhizopora sp., persentase serangan, intesitas serangan, aceh

Pests are organisms that inhibit the growth and development of mangroves, the presence of many types of pests can reduce the quality and quantity of mangroves. The Rhizophora sp. rehabilitation area which has been surveyed has experienced many deaths due to pests, if left continuously it will reduce the diversity of plant species which have major roles and functions ecologically and have the potential to be utilized economically so they must be repaired. The purpose of this study was to analyze the types of pests and the community structure of pests that cause damage to mangrove vegetation in Aceh Besar and Banda Aceh. Seedling and pest data were collected using a 4m x 2m quadratic transect. There were 4 types of pests found, namely Balanus amphitrite, Pangodiella sp., Prociphilus tessellatus, and Littoraria scabra. The structure of the pest community at the research station showed that the diversity value was low, the population uniformity value was moderate, and the dominance was close to 1 which indicated that there was a dominating species, namely Balanus amphitrite. Percentage of pest attacks on Rhizophora sp. in the three stations it is categorized as mild while the intensity of the attack is highest at station II with the moderate category. There is a significant relationship between snails and mangrove density at station II where P sig < 0.05 with a very strong correlation of 0.998 meaning that the density or density of mangroves greatly influences the existence of Littoraria scabra pests. Keywords: Pest Community Structure, Rhizopora sp., attack percentage, attack intensity, Aceh