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Title: | Populasi Bakteri Nitrifikasi dan Denitrifikasi Terisolasi Pada Ekosistem Lamun di Pulau Pramuka, Jakarta |
Other Titles: | Isolated Populations of Nitrifying and Denitrifying Bacteria in Seagrass Ecosystems on Pramuka Island, Jakarta |
Authors: | Ismet, Meutia Samira Cakasana, Nadya Putra, Yan Tera Dhiyana |
Issue Date: | Aug-2023 |
Publisher: | IPB University |
Abstract: | Bakteri mengambil peran penting pada ekosistem lamun, salah satu contohnya
peran bakteri nitrifikasi dan denitrifikasi yang berperan dalam siklus nitrogen pada
ekosistem lamun. Nitrogen adalah nutrien esensial yang sangat dibutuhkan oleh
tanaman dan organisme hidup lainnya. Tujuan penelitian ini untuk mengisolasi
bakteri asosiasi sedimen lamun yang berperan dalam siklus nitrifikasi dan
denitrifikasi di ekosistem lamun Pulau Pramuka, Kepulauan Seribu, Jakarta.
Penelitian yang dilakukan meliputi isolasi bakteri menggunakan media spesifik
nitrifikasi dan denitrifikasi dari sampel sedimen lamun, karakterisasi bakteri secara
morfologi koloni, bentuk sel dan pewarnaan Gram, uji oksidatif/fermentatif,
katalase, oksidase, selulase, motilitas, serta dilakukan pengukuran kualitas perairan,
kualitas sedimen, dan komposisi lamun. Jenis lamun yang ditemukan pada lokasi
pengamatan yaitu, Thalassia hemprichii, Cymodocea rotundata, Halophila ovalis,
dan Enhalus acoroides. Jenis lamun Thalassia hemprichii mendominasi pada kedua
Stasiun penelitian. Isolat bakteri yang berhasil diisolasi menggunakan media
spesifik nitrifikasi berjumlah 16 isolat dan isolat bakteri yang berhasil diisolasi
menggunakan media denitrifikasi berjumlah 23 isolat. Karakteristik isolat bakteri
pada kedua Stasiun penelitian didominasi tepian licin, bentuk bundar, elevasi
cembung, pigmen putih, dan dominan masuk kedalam golongan Gram negatif
dengan bentuk basil. Uji oksidatif mendapatkan hasil 8 isolat oksidatif, oksidase
positif ditemukan pada 29 isolat, pengujian katalase ditemukan 39 isolat positif, dan
uji motilitas positif pada bakteri jenis nitrifikasi dan negatif pada bakteri jenis
denitrifikasi. Hasil dari uji terhadap seluruh isolat selanjutnya dilakukan identifikasi
dan memperoleh hasil 5 genus bakteri yaitu, Pseudomonas, Corynebacterium,
Achromobacter, Moraxella, dan Brucella. Jumlah isolat bakteri yang terisolasi
dikaitkan dengan kerapatan lamun perjenis dengan menggunakan analisis Pearson
Correlation yang menunjukkan hasil adanya hubungan isolat bakteri terhadap
kerapatan jenis lamun Bacteria play an important role in seagrass ecosystems, one example being the role of nitrifying and denitrifying bacteria in the nitrogen cycle of seagrass ecosystems. Nitrogen is an essential nutrien required by plants and other living organisms. The objective of this research is to isolate sediment-associated bacteria that play a role in the nitrification and denitrification cycles in the seagrass ecosystem of Pramuka Island, Thousand Islands, Jakarta. The research includes isolating bacteria using specific nitrification and denitrification media from seagrass sediment samples, characterizing bacteria based on colony morphology, cell shape and Gram staining, oxidative/fermentative tests, catalase, oxidase, cellulase, motility, as well as measuring water quality, sediment quality, and seagrass composition. The seagrass species found at the observation site are Thalassia hemprichii, Cymodocea rotundata, Halophila ovalis, and Enhalus acoroides. Thalassia hemprichii dominates at both research stations. A total of 16 bacterial isolates were successfully isolated using specific nitrification media, and 23 bacterial isolates were successfully isolated using denitrification media. The characteristics of the bacterial isolates at both research stations are predominantly smooth edges, round shape, convex elevation, white pigment, and predominantly fall into the Gram-negative group with bacillus shape. The oxidative test resulted in 8 oxidative isolates, positive oxidase was found in 29 isolates, catalase testing showed 39 positive isolates, and motility test was positive for nitrifying bacteria and negative for denitrifying bacteria. Further identification of all isolates resulted in the discovery of 5 bacterial genera: Pseudomonas, Corynebacterium, Achromobacter, Moraxella, and Brucella. The number of isolated bacteria is associated with the density of seagrass species, as indicated by Pearson Correlation analysis, showing a relationship between bacterial isolates and seagrass species density. |
URI: | http://repository.ipb.ac.id/handle/123456789/123039 |
Appears in Collections: | UT - Marine Science And Technology |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
Cover (2).pdf Restricted Access | Cover | 2.73 MB | Adobe PDF | View/Open |
Skripsi_Yan Tera Dhiyana Putra_C54160043 [FIX].pdf Restricted Access | Fullteks | 8.73 MB | Adobe PDF | View/Open |
Lampiran.pdf Restricted Access | Lampiran | 2.01 MB | Adobe PDF | View/Open |
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