Tyas, Diani Estining
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PERBEDAAN JUMLAH BAKTERI DALAM SEDIMEN PADA KAWASAN BERMANGROVE DAN TIDAK BERMANGROVE DI PERAIRAN DESA BEDONO, DEMAK Tyas, Diani Estining; WIdyorini, Niniek; Solichin, Anhar
Management of Aquatic Resources Journal (MAQUARES) Vol 7, No 2 (2018): MAQUARES
Publisher : Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (643.687 KB) | DOI: 10.14710/marj.v7i2.22541

Abstract

Mangrove adalah salah satu ekosistem pesisir yang unik dan rawan serta termasuk tempat terjadinya proses dekomposisi. Bakteri sebagai dekomposer memiliki peran yang besar terhadap proses dekomposisi bahan – bahan organik sedimen. Oleh sebab itu total bakteri pada sedimen dapat dijadikan indikator kualitas lingkungan. Tujuan dari penelitian ini adalah untuk mengetahui total bakteri dalam sedimen pada kawasan bermangrove dan tidak bermangrove dan untuk mengetahui perbedaan total bakteri sedimen pada kedua kawasan tersebut. Penelitian ini dilaksanakan pada 8 – 22 November 2017 untuk pengambilan sampel sedimen di Perairan Desa Bedono, Demak dan analisis total bakteri sedimen dilaksanakan di Laboratorium Tropical Marine Biotechnology, Universitas Diponegoro selama November hingga Desember 2017. Metode yang digunakan pada penelitian ini adalah metode survei, isolasi bakteri dilakukan dengan metode pour plate dan metode yang digunakan dalam perhitungan total bakteri adalah Total Plate Count (TPC). Jumlah bakteri yang didapat pada kawasan bermangrove sebesar 0,26 x 104 hingga  0,80 x 104 CFU/gr. Pada area tidak bermagrove total bakteri yang didapat sebesar 0,84 x 104 hingga 1,35 x 104 CFU/gr. Kesimpulan penelitian ini adalah dengan uji Mann – Whitney diketahui adanya perbedaan jumlah bakteri sedimen pada kawasan bermangrove dan tidak bermangrove. Mangrove is one of the unique prone coastal ecosystems and it belongs to the place of the decomposition process. Bacteria as decomposers have a major role in the decomposition process of sedimentary organic materials. Therefore, the total bacteria in sediment can be used as an indicator of environmental quality. The purposes of this research are to know the total sedimentary bacteria  in mangrove and non-mangrove area and to know the differences of total sedimentary bacteria in both areas. The research was conducted from 8 to 22 November 2017 for the sampling of sediments in the waters of Bedono Village, Demak and total analysis of sediment bacteria was conducted in the Tropical Marine Biotechnology Laboratory, Diponegoro University during November to December 2017. The method used in this research was survey method, bacterial isolation was done by pour plate method and the method used in total calculation of bacteria was Total Plate Count (TPC). The total bacteria which gained in the mangrove area are 0.26 x 104 to 0.80 x 104 CFU / gr. While in the non-mangrove area the total bacteria which gained are 0.84 x 104 to 1.35 x 104 CFU / g. The conclusion of this research, by Mann - Whitney test, is known there are the differences of total sedimentary bacteria in the mangrove area and non-mangrove area.
THE EFFECTIVENESS OF COMMUNITY-BASED SEA TURTLE MONITORING SUPPORTS HATCHING SUCCESS ON BANDO ISLAND, PIEH ISLAND MARINE PROTECTED AREA Widhayanti, Arintika; Tyas, Diani Estining; Nugraha, Adiguna Rahmat; Jasilah, Nur; Hanif, Andriyatno; Hamdika, Wahyu; Irfansyah, Rahmat
Saintek Perikanan : Indonesian Journal of Fisheries Science and Technology Vol 20, No 3 (2024): SAINTEK PERIKANAN
Publisher : Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ijfst.20.3.110-116

Abstract

Bando Island is an important part of Pieh Island Marine Protected Area which is a sea turtle nesting habitat in West Sumatra Province. Sea turtle conservation is carried out collaboratively by community groups driving conservation, island customs, and the people of Padang Pariaman Regency. The community groups and the island owners' customary law conduct sea turtle conservation on Bando Island. The purpose of this study was to identify community involvement in sea turtle monitoring activities and analyze the hatching success as an indicator of the effectiveness of community-based sea turtle monitoring on Bando Island. Field surveys were conducted from January 2020 to August 2024. The method used in analyzing research data were quantitative method. The community involvement in sea turtle monitoring consisted of observation, data collection, and reporting. The sea turtle species that landed were green sea turtles (Chelonia mydas) and hawksbill turtles (Eretmochelys imbricata). The number of eggs moved to semi-natural relocated nests is 13.123 and the number of hatchlings released is 10.699 green hatchlings and 1.730 hawksbill hatchlings. The effectiveness of community-based sea turtle monitoring can be seen from the discovery of sea turtle tracks that have the potential to find egg nests, the percentage of egg hatching in semi-natural relocated nests was 91,72% indicating optimal hatching power, and hatching success reaching 90.64% which is included in the high category.