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Mangrove merupakan varietas komunitas pantai tropik dan subtropik  yang mampu beradaptasi dengan salinitas tertentu. Jenis Avicennia marina dan Rhizophora mucronata merupakan tegakan alami dan hasil rehabilitasi. Kegiatan konservasi di lokasi ini belum dikelola baik sehingga struktur dan komposisi bervariasi. Hal ini dapat diatasi yang salah satunya dengan herbivori sebagai parameter tingkat kerusakan ekosistem mangrove. Daun merupakan salah satu bagian tumbuhan yang mengalami perubahan bentuk karena pemangsaan.  Tujuan penelitian ini untuk mengetahui tingkat herbivori daun A.marina dan R. mucronata berdasarkan perbedaan spesies, umur daun dan ketinggian pohon. Metode deskriptif digunakan dalam penelitin ini dan penentuan lokasi pengambilan sampel dengan metode purposive sampling. Sampel daun diambil dari tiga kategori ketinggian yang berbeda yaitu  1-3 m, &gt;3-5 m, masing-masing sebanyak 10 ulangan (pohon) untuk setiap kategori. Daun dipisahkan berdasarkan umur daun (tua atau muda) dan kondisi daun (utuh atau rusak) dan total daun diambil sebanyak 10%. Hasil penelitian menunjukan nilai rerata pada setiap jenis, umur daun dan ketinggian pohon diperoleh tingkat herbivori A. marina yaitu 4,66%  (0,16% - 8,93%) sampai 11,59% (2,14% - 21,97%) sedangkan R. mucronata yaitu 5,23% (0,31% - 9,94%) sampai 12,44% (3,50% - 23,81%).HERBIVORY LEVEL OF MANGROVE LEAVES Avicennia marina (FORSSK.) VIERH AND Rhizophora mucronata IN MANGROVE VEGETATION - TIMBULSLOKO, DEMAK. Mangroves are variety of tropical and subtropical coastal communities that adapt to certain salinity. Avicennia marina and Rhizophora mucronata were found in location. Conservation activities were not managed so the structure and composition varies. This can be overcome one of them with herbivory as a parameter of the level damage to mangrove ecosystems. The leaves are one part of the plant that changes shape due to predation. The purpose of this study was to determine herbivory level of A.marina and R. mucronata leaves based on differences in species, leaf of age and tree of height. Descriptive method is used in this study and the determination of the location sampling with the purposive sampling method. Leaf samples were taken from three different height categories namely   1-3 m,&gt; 3-5 m, each with 10 replications (trees) for each category. The leaves are separated based on the age of the leaves (old or young) and the condition of the leaves (whole or damaged) total leaves taken as much as 10%. The results showed the average value of each species, leaf age and height of the tree obtained A. marina herbivory level of 4.66% range (0.16% - 8.93%) to 11.59% range (2.14% - 21.97%) while R. mucronata is 5.23% range (0.31% - 9.94%) to 12.44% range (3.50% - 23.81%).

TINGKAT HERBIVORI DAUN Avicennia marina (FORSSK.) VIERH DAN Rhizophora mucronata DI VEGETASI MANGROVE – TIMBULSLOKO, DEMAK