Hasil Pencarian  ::  Simpan CSV :: Kembali

Abstrak :
Bay has an important role for regional development .Bay can be functioned as an economic "installation" such as harbor,marine industry,fishery, and tourism area but in other side it has a lot of problems.....

Abstrak :
ABSTRACT
Since the Jakarta Bay is economically important for various stake holders, then understanding the eutrophication processes, condition and its status, in the past, present time, and in the future through scientific research is inevitable. The objectives of this research are (1) To analyze the water quality parameters that can be used as an indicator of eutrophication phenomenon, (2) To develop monitoring tools for observing eutrophication process, and (3) To assess the tendency of eutrophication in the future using ASSETS (Assessment of Estuarine Trophic Status) model. The method used in this research is marine remote sensing techniques through the application of multi-temporal and multi-sensor of Landsat satellites data. Results from field sampling of water quality data indicated that the mean of water transparency were stable during 1970?s to 1990?s around 7.5 m, but sharply decreased to 3.8 m in 2000?s On the other hand, the mean chlorophyll-a concentration showed a reversal pattern from water transparency, that the concentration was rapidly increased from 1.71 to 7.8 g/m3 during 1970?s to 2000?s. Based on these data, eutrophication is occuring in the Jakarta Bay. Empirical model for predicting water transparency developed using multitemporal Landsat-7 ETM+ data and field data collected in 2004 indicated that the model was good and capable to predict water transparency. The model was applied to both old Landsat aquired in 1970?a (Landsat-1, 2 and 3 MSS), 1980?s (Landsat-4 and 5 MSS and TM), and 1990?s (Landsat-5 and 7, TM and ETM+), as well as the latest data of 2000?s (Landsat-7 ETM+). Maps of water transparency and Trophic State Indeks (TSI) derived from emprical predicting model indicated a decreasing tendency of water transparency from 7.5 to 4.0 m during the 1970?s to 2000?s with the higest decreasing rate from 1980?s to 2000?s, while the TSI showed an oligotrophic condition during 1970?s to 1980?s, but move to mesotrhopic condition in 1990, and decreasing to eutrophic and hypertrophic condition in 2000?s. Thus, all these facts proved that the eutrophication is still going from the past to the present time. Utilization of ASSETS model for knowing the eutrophication of Jakarta Bay in the future based on several input parameters showed that strong eutrophicatiom will be continued in the future in which caused worsen condition of the water quality.

Abstrak :
Telah dilakukan penelitian tentang komunitas Gammaridea di perairan pantai Sainpur—Marunda, Teluk Jakarta pada bulan September dan Oktober 1993. Penelitian bersifat deskriptif dan bertujuan mengetahni jenis, frekuensi kehadiran, keanekaragaman jenis, dan kepadatan individu Gammaridea dalam jarak 100 m dari garis pantai. Sampel diambil dengan Ekman grab sampler (15 cm x 15 cm) pada garis transek di lima stasiun, yaitu (I) Pantai Sampur; (II) Pantai Cilincing; (III) Muara Cakung Drain; (IV) Pantai Marunda; dan (V) Muara Surigai Blencong. Hasil yang diperoleh 7 jenis Gammaridea yang mewakili 7 suku. Jenis yang paling banyak jumlahnya dan paling Bering ditemukan adalah Lembos sp., sedangkan yang paling sedikit dan jarang ditemukan adalah Ampelisoa sp. Indeks keanekaragaman jenis tertinggi berada di Stasiun IV (H' = 1,929), sedangkan yang terendah di Stasiun I (H' = 0). Kepadatan rata-rata tertinggi dijumpai di Stasiun II (1238 indivdu/m^) dan yang terendah di Stasiun I (4 individu/m^). Dari hasil penelitian dapat disimpulkan bahwa kehadiran Gammaridea dipengaruhi oleh tipe sedimen dan kondisi perairan di setiap stasiun.

Abstrak :
ABSTRAK
Pantai merupakan daerah peralihan antara daratan dan lautan. Garis pantai dianggap satu bentuk yang mengalami proses paling dinamis, dan abrasi serta akresi adalah proses yang berlangsung terus menerus terhadap garis pantai. Masalah dalam penelitian ini adalah bagaimana dinamika abrasi dan akresi yang terjadi di pantai Teluk Banten dan hubungannya dengan faktor-faktor fisik daratan dan lautannya. Pengukuran abrasi dan akresi sangat penting sebagai pengetahuan terkini yang dapat mendukung tahapan awal dalam mitigasi bencana pesisir. Abrasi dan akresi didapatkan dengan overlay garis pantai tahun 1998 dengan 2014 hasil ekstrak dari peta RBI,citra Landsat OLI 8 dan citra resolusi tinggi Quickbird. Luas, laju, jarak perubahan, dan panjang garis pantai yang mengalami keduanya dianalisis berdasarkan segmen (segmen 1, 2, 3, dan 4). Variabel yang digunakan antara lain variabel fisik daratan yaitu topografi, geologi, penggunaan lahan, dan garis pantai, sedangkan variabel fisik lautan diantaranya gelombang, arus, pasang surut dan batimetri. Faktor daratan menjadi fokus analisis dalam penelitian ini tetapi tidak pula mengenyampingkan faktor-faktor dari lautan. Hasil penelitian menunjukan abrasi pantai Teluk Banten terjadi di desa Pamengkang sampai Terate dan desa Domas sampai Linduk dengan luas abrasi 259.36 Ha, laju 4.5 ? 41.8 m/thn, dan jarak abrasi 23 ? 628 m. Sedangkan akresi terjadi di desa Banten yaitu bagian Tengah Teluk dengan luas 26.24 Ha, laju 0.3 ? 11.4 m/th, dan jarak akresi 5-172 m. Dari hasil analisis didapatkan bahwa keseimbangan karakteristik fisik pantai (darat maupun laut) memberi pengaruh yang besar terhadap berlangsungnya proses abrasi dan akresi di pantai Teluk Banten.

---

ABSTRACT
The beach is a transition area between land and sea. The coastline is considered one form of that experienced the most dynamic processes, abrasion and accretion is a process that continuesly to the coastline. This study wanted to find out how erosion and accretion that occurred in the Gulf coast of Banten and its relationship to physical factors land and oceans. In this study, abrasion and accretion seen through changes in the coastline in 1998 with 2014 extracted from Rupa Bumi Indonesia map, Landsat OLI 8 and high resolution Quickbird imagery. Abrasion and accretion is calculated based on the area, rate, distance changes, and long coastline experienced both and segmented analysis (segment 1, 2, 3 and 4). Variables used among other physical variables that land topography, geology, land use and coastline, while the physical variables such ocean waves, currents, and tides. Factors of land became the focus of analysis in this study, but does not also rule out the factors of the ocean. Physical factors mainland have a considerable influence on the amount of abrasion and accretion process. The results showed the gulf coast of Banten has been experiencing abrasion and accretion, where abrasion occurs in Pamengkang until Terate and Domas until Linduk but dominated in Domas until Linduk with 259.36 ha, the rate of 4.5 - 41.8 m / yr, and abrasion distance 23-628 m, While the accretion occurs in Banten, namely Central part of the Gulf with an area of 26.24 ha, the rate of 0.3 - 11.4 m / year, and the distance accretion 5-172 m. In the first segment is any part of the Western Gulf coastal reclamation. From result analysis, it was found that the balance of characteristic of coast have the great effect to process abrasion and accretion going on nicely in the coastal of Banten Gulf.

Abstrak :
Penelitian mengenai kelimpahan dan keanekaragaman mikroalga epifit pada Halimeda di Teluk Hurun, Lampung telah dilakukan pada bulan September 2022. Tujuan dari penelitian adalah untuk mengidentifikasi keanekaragaman dan mengetahui kelimpahan jenis mikroalga epifit pada Halimeda di Teluk Hurun, Lampung. Mikroalga epifit diambil dari 10 titik sampling, penghitungan jumlah sel dan identifikasi mikroalga epifit dilakukan dengan metode subsampel di bawah mikroskop. Sepuluh (10) genus mikroalga epifit berasal dari dua kelas, yaitu Bacillariophyceae dan Cyanophyceae. Sepuluh genus tersebut meliputi Synedra, Nitzschia, Cocconeis, Licmophora, Amphipleura, Amphora, Diploneis, Aulacoseira, Cymbella, dan Trichodesmium. Hasil penelitian menunjukan kelimpahan total mikroalga epifit pada Halimeda berkisar antara 12000-39164 sel/mL. ......Research on the abundance and diversity of epiphytic microalgae on Halimeda in Hurun Bay, Lampung has been carried out in September 2022. The purpose of this study was to identify and determine the diversity and abundance of epiphytic microalgae in Halimeda at Hurun Bay, Lampung. Epiphytic microalgae were sampled from 10 sampling points. Cell counting was carried out using the subsample method. Identification of epiphytic microalgae was based on morphological character using a light microscope. The result of study showed that epiphytic microalgae found at Hurun Bay belonged to two classes, namely Bacillariophyceae and Cyanophyceae. Genera were identified, which were Synedra, Nitzschia, Cocconeis, Licmophora, Amphipleura, Amphora, Diploneis, Aulacoseira, Cymbella, and Trichodesmium. The total abundance of epiphytic microalgae in Halimeda ranged from 12000-39164 cells/mL.

Abstrak :
ABSTRAK
Telah dilakukan penelitian Mollusca bentik di perairan pantai Taman Impian Jaya Ancol (TIJA), Teluk Jakarta pada bulan September-Oktober 1993. Penelitian ini bersifat deskriptif dan bertujuan mengetahui jenis-jenis mollusca yang ada serta sebaranya dalam jarak 100m dari pantai.

Penelitian ini dilakukan dengan metode transek garis di lima stasiun, yaitu (1) Pantai Marina; (2) Pantai Indah; (3) Pantai Danau; (4) Pantai Binaria; (5) Pantai Bagus; Pada setiap stasiun ditentukan 10 substasiun berjarak antara 10m. Pengambilan sampel dilakukan 2 kali setiap substasiun dengan Ekman grab sampler (15x15 cm).

Dari penelitian ini diperoleh 30 Jenis Mollusca yang meliputi 28 Jenis dari kelas Pelecypoca dan 2 Jenis dari kelas Gastropoda. Keanekaragaman jenis ini tertinggi ditunjukan Stasiun 1 (H'=1, 567), sedangkan yang terendah di stasiun II (H'=0,442).

Sebaran Mollusca di perairan TIJA menunjukan pola merumpun. Dari hasil penelitian ini dapat disimpulkan bahwa (1) tipe dasaran perairan pantai TIJA sesuai untuk tempat hidup Mollusca, khususnya dari kelas Pelecypoda dan merupakan faktor penentu pola sebaran Mollusca; (2) Kegiatan reklamasai di perairan TIJA mengubah habitat sedemikian rupa, sehingga terdapat jenis yang diduga berasa dari tempat asal urukan.