PHOSPHATE AND NITRATE DISTRIBUTION IN INNER AMBON BAY DURING NORTHWEST AND SOUTHEAST MONSOON

This study has compared the distribution of nutrients phosphate and nitrate concentrations in the inner Ambon Bay during two different seasons: Northwest and Southeast monsoon. The result showed that the nutrient concentrations in the Southeast monsoon were higher than those in the Northwest monsoon, both for phosphate and nitrate. The ranges of phosphate concentrations on the surface and near the bottom of the bay during the Northwest monsoon were 0.0471-0.0549 mg/L and 0.0549–0.1176 mg/L, while the ranges of nitrate concentrations were from undetected to 0.0976 mg/L on the surface, and 0.0956–0.5870 mg/L near the bottom of the bay. Meanwhile, the phosphate and nitrate concentration on the surface during the Southeast monsoon were 0.0495–0.0676 mg/L and 0.0247–0.4019 mg/L, while near the bottom the concentrations were 0.0495–0.1802 mg/L and 0.0247– 0.7944 mg/L. These results indicated that phosphate and nitrate concentrations in the inner Ambon Bay have exceeded the marine water standard quality, which can be categorized as polluted. High concentrations of phosphate and nitrate during Northwest monsoon could be caused by run-off from the mainland area that enters the bay trough the river. On the other hand, the enrichment of nutrients in the inner Ambon Bay during the Southeast monsoon could be dominated by the “nutrient-rich water mass” from Banda Sea that enters the inner Ambon Bay

DIVERSITY, COMPOSITION AND UTILIZATION OF MOLLUSC IN SAPARUA ISLAND, CENTER MOLUCCA

Saparua Island is one of the islands in the Central Moluccas that has a complete ecosystem, unfortunately records on mollusk research is very limited. The aim of this research is to know the composition, diversity and utilization of mollusk. The objectives of the study are to determine the composition, diversity and utilization of mollusks using square transect and free collection method which conducted on April and September 2016. Water analysis is also done to determine the environmental hydrographic condition. Temperature and salinity indicate the presence of freshwater input through rivers, especially in St-2 2 (Waisisil). Concentrations of nutrients show a fairly high value, ranging from 0.001 to 0.114 mg L-1 for phosphate; 0.012 - 0.023 mg L -1 for nitrate and 0.140 - 0.443 mg L -1 for silicate. There are 641 individual mollusks of 107 species consisting of 85 species of Gastropoda and 22 species of Bivalves. Species found mostly by Littoraria scabra (Littorinidae), Cypraea annulus (Cypreidae), Terebralia sulcata (Potamididae); Clypeomorus battilariaeformis (Cerithiidae); and Nerita chamaeleon (Neritidae). The existing mollusk community has moderate and uniform diversity with low species dominance. There are at least 35 species of mollusks that can be utilized into various commodities such as food products, accessories/decorations and raw materials of drugs

Dissolved Cd, Cu, Zn, and Cu-binding organic ligands in the East China Sea

Concentrations of dissolved Cd, Cu, and Zn, and Cu-binding organic ligands in the waters of the Kuroshio region in the East China Sea were presented in this dataset. The samples were collected as part of the GEOTRACES-Japan project during KH-15-3 cruise (Principal Investigator: Jing Zhang, Toyama University, Japan) onboard R/V Hakuho Maru in October 2015 to understand trace element distributions and behaviors in the highly dynamic East China Sea. All sampling followed trace-metal clean techniques as stated in the GEOTRACES cookbook. Seawater samples were filtered through 0.2 μm filter and acidified for dissolved trace metal analysis or frozen for organic ligand analysis. Trace metal concentrations were measured using ICP-MS following pre-concentration by NOBIAS PA-1 chelating resin column, while the chemical speciation parameters of Cu were determined using competitive ligand exchange adsorptive cathodic stripping voltammetry with salicylaldoxime as the competing ligand. These data reveal the unique interaction between the continental shelf waters and Kuroshio waters in the East China Sea

STUDI KOMPARASI Ni-Zn LHS DAN Mg-Al LDH SEBAGAI ADSORBEN ZAT WARNA NAVY BLUE DAN YELLOW F3G

The adsorption of navy blue and yellow F3G dyes in waste water of dyeing fabric having ability for anti NIR detection device by Ni-Zn layered hydroxide salt (LHS) and Mg-Al layered double hydroxide (LDH) has been studied in this work. Ni-Zn LHS was synthesized by hydrolysis method using nickel acetate and zinc acetate salts as precursors. Mg-Al LDH was synthesized by coprecipitation method of magnesium nitrate and aluminum nitrate salts. Waste water of fabric dyeing for anti NIR detection device was obtain through hydrothermal process of mixed solution of navy blue and yellow F3G. To obtain optimum adsorption condition for each dye on each adsorbent, variation of acidity, concentration of dye and interaction time has been done. It has been also studied the ability of adsorbent to reused. The result showed that optimum adsorption condition of navy blue and yellow F3G on Ni-Zn LHS and Mg-Al LDH was at pH 3 and 4, respectively. The optimum interaction time for navy blue and yellow F3G on Ni-Zn LHS was 120 and 150 minutes, respectively, while that for navy blue and yellow F3G on Mg-Al LDH was 90 and 120 minutes. Adsorption of both disperse dyes by the two adsorbents followed Ho pseudo second order kinetics. Adsorption equilibrium of navy blue on both adsorbent followed Freundlich isotherm adsorption, while that of yellow F3G followed Langmuir isotherm adsorption. When applied to adsorb dyes in waste water, Ni-Zn LHS has better capability than Mg-Al LDH, as indicated by its adsorption capacity as high as 52.33 mg/g, while that of Mg-Al LDH was 30.54 mg/g. Calcination of the already used adsorbent increased the adsorption capacity of Mg-Al LDH to 84.75 mg/g, but decreased the adsorption capacity of the Ni-Zn LHS to 42.65 mg/g

Species richness, abundance and vertical distribution of Copepods in Banda Sea, Indonesia

The aims of this research were to investigate the species richness and abundance of Copepods. Copepods were sampled using rosette sampler (surface, 25 m and 75 m) on November 21st – 30th, 2013, from the Banda Sea. A total of 21 taxa of Copepods belonging to three orders were identified. Calanoid was identified as the most richness order, followed by Cyclopoid and Harpacticoid. The highest value of total abundance in the surface water is 121 ind/6L, in the 25 m of depth is 221 ind/6 L, and in the 75 m of depth is 96 ind/6L. Acrocalanus longicornis is the most abundant taxa of Copepods, followed by Acartia bispinosa, and Subeucalanus mucronatus. The most predominant taxa of Acartia bispinosa, and Subeucalanus mucronatus showed a remarkable peak at 25 m layers

Species richness, abundance and vertical distribution of Copepods in Banda Sea, Indonesia

The aims of this research were to investigate the species richness and abundance of Copepods. Copepods were sampled using rosette sampler (surface, 25 m and 75 m) on November 21st – 30th, 2013, from the Banda Sea. A total of 21 taxa of Copepods belonging to three orders were identified. Calanoid was identified as the most richness order, followed by Cyclopoid and Harpacticoid. The highest value of total abundance in the surface water is 121 ind/6L, in the 25 m of depth is 221 ind/6 L, and in the 75 m of depth is 96 ind/6L. Acrocalanus longicornis is the most abundant taxa of Copepods, followed by Acartia bispinosa, and Subeucalanus mucronatus. The most predominant taxa of Acartia bispinosa, and Subeucalanus mucronatus showed a remarkable peak at 25 m layers