Nirwani Soenardjo
Jurusan Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan Universitas Diponegoro
Articles
13
Documents
Aplikasi Budidaya Rumput Laut Eucheuma cottonii (Weber van Bosse) Dengan Metode Jaring Lepas Dasar (Net Bag) Model Cidaun

BULETIN OSEANOGRAFI MARINA Vol 1, No 1 (2011): Vol 1, No.1, Oktober 2011
Publisher : BULETIN OSEANOGRAFI MARINA

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Abstract

Abstract                 Eucheuma cottonii (Weber van Bosse) is a marine commodity, wich need several particuliarly treatment in the enviroment due to  their cultivation.  The floating cultivation model cidaun using the net for sea grass cultivation is the preference methods to protec the thallus.             The aim of the research is to find the specific growth rate of the Euheuma cottonii at the Bantarpanjang Nusakambangan Island. The eksperiment were done from April to Mei 2004. The research eksperiment based on the randomize with factorial approach 2 x2. The amount of seed (100 gr , 150 gr) and the seagrass distance ( 1,5 m , 2 m ) were aplied as the treatment with 5 replications. The research result show that the specific growth rate reach 4,4 %  , wich justified that the cidaun floating methode can be applied as the cultivation methode.   Key Words  : Eucheuma cottonii, Cultivation, Cidaun floating metode, specific growth rate

Pengaruh Kadar Abu Gosok Selama Perebusan Dan Lama Perendaman Air Terhadap Kadar Tanin Buah Dan Tepung Mangrove (Avicennia marina)

Journal of Marine Research Vol 1, No 2 (2012): Journal of Marine Research
Publisher : Journal of Marine Research

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Abstract

Mangrove fruit has the potential to be developed as a potential food source, but the presence of toxins in the fruit are considered harmful if consumed in the long run. Therefore, research needs to be done to eliminate or reduce the levels of toxins in the mangrove fruit, The poison in one of which is the fruit of mangrove tannins. One alternative to reduce the levels of toxins in the fruit of the mangrove scrub with ash and water immersion. This research used Completely Randomized Design, factorial pattern consisting of two factors with three replications, factor I was rubbing ash powder content (5%, 10%, and 15%), and factor II is long soaking water for 6 hours (with 4, 8, 12 times the turnover of water). The results showed that treatment with boiling some rubbing ash content (5%, 10%, and 15%) and long soaking water to give a significant influence (P <0.05) toward decreased levels of mangrove Avicennia marina fruit tannins. Treatment of boiling ash content of 15% gave the lowest reduction is 28.92% and the long soaking water for 6 hours with a change of water 12 times giving the low tannin levels decrease is 28.80%, as well as mangrove fruit flouring will A.marina lower levels of tannin by 28.44%.

Struktur dan Komposisi Vegetasi Mangrove di Kawasan Pesisir Pulau Sebatik, Kabupaten Nunukan, Kalimantan Timur

Journal of Marine Research Vol 1, No 2 (2012): Journal of Marine Research
Publisher : Journal of Marine Research

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Abstract

Sebatik Island is one of the main habitat of mangrove ecosystems in Indonesia. Based on the function, one of the mangrove forest resources with huge potential. Mangrove communities occupy the area between land and sea that have environmental conditions differ from one another. This is interesting because the management is still encountered some problems such as the conversion of mangrove forest as an area of fishpond, housing and other interests. The purpose of this study to determine the structure and composition of mangrove vegetation in Coastal Areas of Sebatik Island, Nunukan regency, East Kalimantan. The study was conducted at five locations on the island of Sebatik, the River Stake, Cape Coral, Balansiku, Setabu and Bambangan, each site is divided into 9 transects. Vegetation data retrieval done by the method of sampling survey. Each transect sampling plot made. Each individual tree (plot 10 m x 10 m) and Sapling (subplot 5 m x 5 m) were identified and measured diameter at breast height (± 1.3 m). While the calculated number of seedlings of each species and the percentage of closure (plots 1 mx 1 m). Mangrove area. The results indicate the presence of 19 species of mangrove species that fall into 14 families were found at the sites. In general, vegetation of mangrove tree is dominated by Sonneratia alba in Sebatik Island with Importance Value (IV) range from 86.83 - 171.43 % and density 500 ind/ha - 2000 ind/ha, except Bambangan which dominated by Rhizophora apiculata 86.52% and density 100 ind/ha. Sapling category, dominated by species of Sonneratia alba in Balansiku and Setabu with IV 136.65 % and 67.65 % with a density 3200 ind/ha and 1600 ind/ha. Sungai Pancang is dominated by species Avicennia alba with IV 81.64 % and density 2000 ind/ha, Tanjung Karang dominated by species Rhizopohora mucronata with IV 59.24% and density 1200 ind/ha, and Bambangan dominated by species Rhizopohora apiculata with IV 82.76% and density 2000 ind/ha. Seedling category, dominated by species of Sonneratia alba in the Sungai Pancang and Setabu with IV 107.15% and 72.79% with a density 30 000 ind/ha and 60 000 ind/ha, Tanjung Karang and Bambangan dominated by species of Rhizophora apiculata with IV 115.55 % and 136.53% and density 50 000 ind/ha and 150 000 ind/ha. species diversity and evenness was average.

Kajian Bioekologi dan Strategi Pengelolaan Ekosistem Mangrove : Studi Kasus di Teluk Awur Jepara

Journal of Marine Research Vol 2, No 1 (2013): Journal of Marine Research
Publisher : Journal of Marine Research

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Abstract

Mangrove ecosystem have an important role in the environment. The ecological values of mangrove Teluk Awur is a place for feeding, nursery and spawning ground mangrove organism. This environment also produce detritus that support the existence of organic matter in the waters around. The purpose of this research was to study the condition of mangroves bioecology and socio-economic conditions for integrated stakeholders strategy and management of mangrove Teluk Awur Jepara. Method used is case study, explorative and descriptive. Data were analyzed using SWOT analysis by weighting or scoring. The result showed Teluk Awur mangrove ecosystem in the categorized into good criteria because of it’s density > 1500 ind/ha. There are 27 mangrove species and various fauna depend their lives on to of Teluk Awur mangrove ecosystems. Management strategies are recommended as the first priority is providing mangrove rehabilitation activities involving the public directly (score 4.125). Second, environmental education and sustainable use of mangrove resources to local communities (score 2.887). Third, rulemaking and standard operating procedure (SOP) specifically management of Teluk Awur mangrove ecosystems by Diponegoro University: Marine Station (score 2.601).

Akumulasi Logam Berat Timbal (Pb) dan Pengaruhnya Terhadap Histologi Akar Mangrove Avicennia marina (Forssk). Vierh. di Perairan Mangunharjo Semarang

Journal of Marine Research Vol 3, No 1 (2014) : Journal of Marine Research
Publisher : Journal of Marine Research

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Abstract

Mangunharjo areas water is an area of coastal waters and the sea which close to the settlement industry and community activities. Where feared result of industrial waste were dumped around it that cause pollution. One form of pollution is the waste produced in the form of lead (Pb) heavy metals is a heavy metal element that can not be broken down by natural processes. The existence of Pb in nature have an impact on coastal vegetation is mangrove. Mangroves are coastal ecosystems which have an important role in estuarine areas. Other mangrove function is to absorb organic and non-organic materials. The purpose of this research was to study the accumulation of lead (Pb) heavy metals in Avicennia marina mangrove roots and influences the type of heavy metal accumulation of lead (Pb) to root tissue in Avicennia marina waters Mangunharjo. This research was conducted with descriptive analytic method. The results showed the amount of heavy metals on the roots of Avicennia marina Pb higher than the Pb content of heavy metals in sediment and water indicating that these plants are able to accumulate heavy metals in the roots to absorb these elements in sediments and water. Observations cell histology showed no change in root tissues of Avicennia marina.

Karakterisasi Bakteri yang Berasosiasi dengan Penyakit Pink-Blotchdi P. Sambangan, Karimunjawa

BULETIN OSEANOGRAFI MARINA Vol 2, No 1 (2013): Buletin Oseanografi Marina
Publisher : BULETIN OSEANOGRAFI MARINA

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Abstract

Sindrome penyakit blotch yang menyerang karang massive mengakibatkan kehancuran sistem ekologi terumbu karang. Penyebaran penyakit ini berjalan sangat cepat dibandingkan dengan laju pertumbuhan karang. Tujuan penelitian ini adalah mengisolasi dan mengidentifikasi bakteri yang berasosiasi dengan sindrom penyakit pink-blotch (PBS) pada karang. Pelaksanaan penelitian  meliputi sampling karang yang dilakukan dengan ScubaDiving pada kedalaman 3 dan 10 meter, identifikasi dan dokumentasi jenis karang yang terserang penyakit secara in situ dengan underwatercamera Nikonos, isolasi dan purifikasi bakteri yang berasosiasi dengan sindrome penyakit blotch, contagious coral experiments skala laboratoris,   postulat Koch’s experiment dilakukan di dalam laboratorium dan di lapangan dengan teknik syringe. Identifikasi bakteri yang berasosiasi dengan penyakit karang PBS secara mikrobiologis dilakukan untuk mengetahui genus agen penyebab penyakit. Hasil penelitian menunjukkan bahwa bakteri yang berasosiasi dengan sindrome penyakit pink-blotch adalah genus Erythrobacter sp.   Kata kunci: terumbu karang, pink-blotch, Erythrobacter sp

Pemangsaan daun Rhizophora stylosa Griff dan Avicennia marina (Forsk) Vierh

BULETIN OSEANOGRAFI MARINA Vol 2, No 2 (2013): Buletin Oseanografi Marina
Publisher : BULETIN OSEANOGRAFI MARINA

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Abstract

Komunitas mangrove di dusun Menco Demak didominasi oleh genus Bruguiera , Avicennia dan Rhizophora dan mengalami pemangsaan.   Penelitian ini dilakukan dengan tujuan untuk menganalisis tingkat pemangsaan daun Rhizophora stylosa Griff dan Avicennia marina (Forsk) Vierh, dan pengaruh umur serta tinggi tumbuhan terhadap pemangsaan. Tingkat pemangsaan daun terjadi pada daun tua dan muda kedua jenis mangrove .Hasil  penelitian menunjukkan adanya perbedaan tingkat pemangsaan daun antara Rhizophora stylosa dengan Avicennia marina. Tingkat pemangsaan pada daun Avicennia marina sebesar 7,92 % sedangkan Rhizophora stylosa 6,54%. Faktor umur  daun dan tinggi tumbuhan berpengaruh terhadap pemangsaan daun baik pada Rhizophora stylosa maupun Avicennia marina. Sedangkan faktor tinggi tumbuhan yang banyak terjadi pada ketinggian  <1m dan 2 - < 3 m untuk Rhizophora stylosa,  Avicennia marina pemangsaan daun  terjadi pada semua kategori ketinggian tumbuhan.   Kata kunci: mangrove, komunitas, pemangsaan,

KAJIAN KEBERADAAN KOMUNITAS MAKROZOOBENTHOS PADA KONDISI EKOSISTEM MANGROVE YANG BERBEDA DI PESISIR SEMARANG

Journal of Marine Research Vol 3, No 3 (2014): Journal of Marine Research
Publisher : Program Studi Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

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Abstract

Program penanaman mangrove merupakan salah satu upaya yang dilaksanakan untuk rehabilitasi kondisi ekosistem mangrove yang telah mengalami kerusakan.Namun program rehabilitasi dan penanaman mangrove di petakan tambak Kelurahan Karanganyar Pesisir Semarang mengalami kegagalan.Hal ini dikarenakan bibit mangrove tidak dapat tumbuh seperti yang diharapkan.Kondisi ekosistem mangrove yang terganggu ini, dikhawatirkan akan menimbulkan respon individu maupun komunitas biota didalamnya, yakni Makrozoobenthos. Makrozoobenthos ini menetap di dasar perairan dan memiliki pergerakan relatif lambat serta daur hidup relatif lama sehingga memiliki kemampuan merespon tekanan ekologis tersebut.Penelitian dilaksanakan pada bulan November– Desember 2013. Metode yang digunakan dalam penelitian ini adalah metode deskriptif. Pengambilan sampel makrozoobenthos dilakukan dengan metode kualitatif dan semi-kuantitatif.Hasil penelitian menemukan genera makrozoobenthos sebanyak 56.Keseluruhan genus terdiri dari 3 kelas, Gastropoda (11), Crustacea (14) dan Polychaeta (31).Rata-rata kelimpahan berkisar antara 268 – 670 Ind/m2.Dimana kelimpahan tertinggi ditemukan di Lokasi Karanganyar 2, sedangkan terendah adalah di Pantai Maron. Indeks Keanekaragaman (H’) termasuk dalam kategori sedang hingga tinggi (1,55 – 3,71). Indeks Keseragaman (e) termasuk dalam kategori sedang hingga tinggi (0,44 – 0,96). Dominansi (C) berkisar antara (0,04 – 0,56), ada dominansi spesies. Kondisi mangrove yang berbeda tidaklah mempengaruhi keberadaan makrozoobenthos, melainkan jenis substrat yang lebih mempengaruhinya.

Analisis Kondisi Lingkungan Pada Kawasan Rehabilitasi Mangrove Di Kota Semarang

977-2407769
Publisher : Program Studi Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

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Abstract

Keberadaan hutan mangrove, khususnya di Kota Semarang sangat rentan terhadap berbagai macam kerusakan yang ditimbulkan akibat erosi, abrasi dan konversi lahan, sehinga perlu dilakukan upaya rehabilitasi untuk memulihkan kembali kondisi hutan mangrove. Kegiatan rehabilitasi memang sudah dilakukan, tetapi tingkat keberhasilan di tiap kawasan memiliki perbedaan yang cukup bervariasi tergantung dari kondisi lingkungan setempat. Penelitian ini dilaksanakan pada bulan Oktober-Desember 2013 di kawasan rehabilitasi mangrove Kelurahan Karanganyar dan Pantai Maron Kelurahan Tambakharjo, Semarang. Metode yang digunakan dalam penelitian ini adalah studi kasus. Hasil dari penelitian ini menunjukkan bahwa kondisi lingkungan perairan di kawasan rehabilitasi mangrove Kelurahan Karanganyar dan Pantai Maron Kelurahan Tambakharjo, Semarang sesuai bagi kehidupan mangrove. Hal ini terlihat dari sebagian besar parameter lingkungan perairan yang masih berada dalam batas kisaran optimum bagi kehidupan mangrove

Produktivitas Dan Dekomposisi Serasah Daun Mangrove Di Kawasan Vegetasi Mangrove Pasar Banggi, Rembang - Jawa Tengah

977-2407769
Publisher : Program Studi Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

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Abstract

Produksi serasah mangrove merupakan bagian yang penting dalam transfer bahan organik, karena unsur hara yang dihasilkan dari proses dekomposisi serasah sangat penting dalam pertumbuhan mangrove dan sebagai sumber detritus bagi ekosistem laut dan estuari. Penelitian ini bertujuan untuk mengkaji tingkat produktivitas serasah dan kecepatan dekomposisi serasah daun mangrove di kawasan vegetasi mangrove Pasar Banggi. Hasil penelitian menunjukan bahwa rerata total produksi serasah sebesar 617,34 gr/100 m/2 minggu. Daun merupakan penyumbang terbanyak rerata total produksi serasah dan Rhizopora mucronata. lebih banyak menyumbangkan serasah dibandingkan dengan Soneratia alba. Sedangkan pada pengamatan proses R. mucronata terdekomposisi lebih cepat dibandingkan S. alba