Athallah, Faiz Purwa and Ir. Mulyanto, M. Si (2023) Struktur Komunitas Vegetasi Mangrove di Teluk Jor, Kecamatan Jerowaru, Kabupaten Lombok Timur. Sarjana thesis, Universitas Brawijaya.
Abstract
Wilayah pesisir adalah daerah peralihan antara ekosistem darat dan laut. Wilayah pesisir merupakan tempat tumbuh dan berkembangnya berbagai ekosistem alami seperti hutan mangrove, terumbu karang, padang lamun, dan estuaria. Hutan mangrove merupakan hutan yang terletak di daerah yang terpengaruhi oleh pasang surut air laut. Hutan mangrove memberikan perlindungan terhadap organisme darat dan laut. Kawasan mangrove yang telah rusak memerlukan upaya rehabilitasi kawasan untuk mengembalikan berbagai fungsi ekosistem mangrove. Upaya rehabilitasi dan konservasi memerlukan informasi terkait struktur komunitas dan faktor lingkungan hutan mangrove yang ada di kawasan agar apabila diadakan kegiatan rehabilitasi ataupun upaya konservasi kawasan mangrove dapat dilakukan secara tepat dan sesuai dengan kondisi lingkungan yang ada. Penelitian ini bertujuan untuk mengetahui struktur komunitas vegetasi mangrove, pola persebaran mangrove, dan hubungan antara kondisi lingkungan dengan pola persebaran mangrove di Teluk Jor, Kecamatan Jerowaru, Kabupaten Lombok Timur. Penelitian ini menggunakan metode survei dan penentuan lokasi sampling menggunakan metode purposive sampling dengan menggunakan transek kuadran berukuran 10x10 m2 untuk kategori pohon, 5x5 m2 untuk kategori pancang, dan 1x1 m2 untuk kategori semai yang diletakkan tegak lurus dari arah laut menuju daratan sebanyak 3 plot. Pengambilan sampel substrat dilakukan di 5 stasiun pengambilan sampel vegetasi mangrove agar diketahui karakteristik substrat di setiap lokasi. Parameter yang diambil untuk analisis adalah salinitas dan pasang surut kawasan mangrove. Setiap data dari stasiun dihitung indeks nilai penting, indeks keanekaragaman Shannon-Wiener, indeks dominansi Simpson, dan indeks persebaran Morisita. Struktur komunitas mangrove di Teluk Jor ditemukan sebanyak 8 spesies mangrove yang merupakan jenis pohon dan permudaannya. Jenis mangrove tersebut diantaranya adalah: Aegiceras floridum, Avicennia alba, Avicennia marina, Ceriops tagal, Rhizophora apiculata, Rhizophora mucronata, Rhizophora stylosa, dan Sonneratia alba. Indeks nilai penting mangrove di kawasan hutan mangrove Teluk Jor yang tertinggi adalah jenis Avicennia alba di stasiun 4 dengan nilai 161.26 dan yang terendah adalah jenis Avicennia alba di stasiun 5 dengan nilai 15.18. Indeks keanekaragaman tertinggi terdapat pada stasiun 2 dengan nilai 2.66 yang termasuk dalam kategori sedang (H’ 1 ≤ H’ ≤ 3) dan terendah terdapat pada stasiun 1 dengan nilai 0.77 yang termasuk dalam kategori rendah (H’ < 1). Indeks dominansi tertinggi terdapat pada stasiun 5 dengan nilai 0.56 yang termasuk dalam kategori dominansi sedang dan yang terendah pada stasiun 2 dengan nilai 0.30 yang termasuk dalam kategori dominansi rendah. Indeks persebaran Morisita tertinggi terdapat pada pola persebaran berkelompok pada jenis Rhizopora mucronata dengan nilai 1.777 dan yang terendah adalah Avicennia marina dengan nilai -0.069.
English Abstract
Coastal areas are transitional areas between terrestrial and marine ecosystems. The coastal area is a place for the growth and development of various natural ecosystems such as mangrove forests, coral reefs, seagrass beds and estuaries. Mangrove forest is a forest located in an area that is affected by tides. Mangrove forests provide protection against terrestrial and marine organisms. Mangrove areas that have been damaged require area rehabilitation efforts to restore the various functions of the mangrove ecosystem. Rehabilitation and conservation efforts require information related to community structure and environmental factors of existing mangrove forests in the area so that rehabilitation activities or efforts to conserve mangrove areas can be carried out appropriately and in accordance with existing environmental conditions. This study aims to determine the community structure of mangrove vegetation, mangrove distribution patterns, and the relationship between environmental conditions and mangrove distribution patterns in Jor Bay, Jerowaru District, East Lombok Regency. This study aims to determine the community structure of mangrove vegetation, mangrove distribution patterns, and the relationship between environmental conditions and mangrove distribution patterns in Jor Bay, Jerowaru District, East Lombok Regency. This study used a survey method and determined sampling locations using a purposive sampling method using quadrant transects measuring 10x10 m2 for the tree category, 5x5 m2 for the sapling category, and 1x1 m2 for the seedling category which were placed perpendicular from sea to land in 3 plots. Substrate sampling was carried out at 5 sampling stations of mangrove vegetation in order to know the characteristics of the substrate at each location. The parameters taken for the analysis are the salinity and tides of the mangrove area. Each data from the station calculated the importance value index, Shannon-Wiener diversity index, Simpson dominance index, and Morisita distribution index. The mangrove community structure in Jor Bay found as many as 8 mangrove species which are tree species and their regeneration. These types of mangroves include: Aegiceras floridum, Avicennia alba, Avicennia marina, Ceriops tagal, Rhizophora apiculata, Rhizophora mucronata, Rhizophora stylosa, and Sonneratia alba. The highest mangrove importance value index in the Jor Bay mangrove forest area was Avicennia alba at station 4 with a value of 161.26 and the lowest was Avicennia alba at station 5 with a value of 15.18. The highest diversity index is at station 2 with a value of 2.66 which is included in the medium category (H' 1 ≤ H' ≤ 3) and the lowest is at station 1 with a value of 0.77 which is included in the low category (H' < 1). The highest dominance index is at station 5 with a value of 0.56 which is included in the medium dominance category and the lowest is at station 2 with a value of 0.30 which is included in the low dominance category. The highest Morisita distribution index was found in the group distribution pattern of Rhizopora mucronata with a value of 1.777 and the lowest was Avicennia marina with a value of -0.069.
| Item Type: | Thesis (Sarjana) |
|---|---|
| Identification Number: | 0522080389 |
| Subjects: | 300 Social sciences > 333 Economics of land and energy > 333.9 Other natural resources > 333.95 Biological resources > 333.956 Fishes |
| Divisions: | Fakultas Perikanan dan Ilmu Kelautan > Manajemen Sumberdaya Perairan |
| Depositing User: | soegeng sugeng |
| Date Deposited: | 26 May 2023 07:06 |
| Last Modified: | 26 May 2023 07:06 |
| URI: | http://repository.ub.ac.id/id/eprint/200477 |
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