STRUKTUR KELIMPAHAN PLANKTON BERDASARKAN PASANG SURUT DI PERAIRAN TANJUNG JUMLAI PENAJAM PASER UTARA KALIMANTAN TIMUR

Penajam Paser Utara Regency is one of the districts that uses natural products from the sea, especially in the Tanjung Jumlai area. Seeing the large number of community activities in the coastal areas of Tanjung Jumlai such as fishing, transportation, industry, mining and others, results in various types of substances entering which can affect aquatic ecosystems. Activities that have a negative impact can cause pollution to the waters such as decreasing the diversity of species of living things, decreasing productivity in these waters, changing the quality of water in the waters. This study aims to determine the structure of plankton abundance based on tides and to know the diversity, uniformity and dominance of plankton in Tanjung Jumlai Penajam Paser North East Kalimantan waters. The time of the study was carried out from February to April 2018. Determination of stations based on purposive sampling technique. The results obtained were analyzed and compared with the t-test level of 5%. Water quality parameters based on physical and chemical properties measured for Tanjung Jumlai Penajam Paser Utara waters are still in good condition. Plankton species found during tides obtained 44 species of phytoplankton and 11 species of zooplankton. Abundance characteristics at tides range from 126 - 7,560 ind / L, diversity index ranges from 2,160 - 2,842, uniformity index ranges from 0,893 - 0,965 and dominance index ranges from 0,085 - 0,219. It was also stated that there was a significant difference after the t-test level of 5%