<![CDATA[Desa Sungai Nibung is a Coastal Waters and Small Islands Conservation Area (KKPP3K) in Kabupatem Kubu Raya. This village has abundant natural resources with high diversity, including crab, fish, shrimp, squid, octopus, and finless dolphins. This natural biota is supported by fertility and good water quality. Water fertility reflects high nutrient content and reports phytoplankton as primary producers. Nutrients in water are available in the form of nitrates and phosphates. These nutrients are needed by phytoplankton and aquatic organisms for their survival. The fertility of waters can also be determined by the chlorophyll-a content, which is the dominant pigment of phytoplankton. This pigment plays a role in photosynthesis. The fertility of the waters of Desa Sungai Nibung in the sea (Station I and II), estuary (Station III), and river (Station IV and V) has been determined. The nitrate and phosphate content in air samples is described in accordance with SNI 06-2480-1991 and SNI 06-6989.31.2005, respectively. The chlorophyll-a was analyzed using the trichromatic method using a UV-Vis spectrophotometer at 664, 647, and 630 nm wavelengths. The nitrate and phosphate content of the waters of Sungai Nibung Village are 0.9-1.5 mg/L and 2.06-2.19 mg/L respectively. Chlorophyll-a in the waters of Sungai Nibung Village is 2-5 μg/L, which is included in the mesotrophic category.]]>
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