ECOLOGICAL CHARACTERISTICS AND PRESENCE OF HABs IN DRY SEASON AT ESTUARY OF TALLO MAKASSAR, SOUTH SULAWESI

Rahmadi Tambaru, Andi Iqbal Burhanuddin, Arniati Massinai, Muhammad Anshar Amran

Abstract


Research on the ecological characteristics and presence of HABs in the dry season at the estuary of Tallo Makassar has been conducted from May to July 2020. Measurement of environmental parameters such as temperature, pH, salinity, current, and dissolved oxygen is carried out on three sampling points T1, T2, and T3. Similarly, water sampling to detect the presence of phytoplankton types. The measurement of other environmental parameters such as turbidity, nitrate, nitrite, ammonia, orthophosphate, and silicate is analyzed in a laboratory. Phytoplankton identification is also carried out in the laboratory. Characteristic analysis of ecology used PCA. To calculate the abundance of phytoplankton cells is used census method. The results showed that the ecological characteristics of Estuarial Tallo on T1 were characterized by dissolved oxygen, turbidity, and nutrients (nitrate, nitrite, ammonia, orthophosphate, and silicate). T2 is characterized by pH and temperature. The environmental characteristics in T3 are inverse to T1. HABs were detected in five species, namely Ceratium furca, Ceratium fusus, Gonyaulax sp, Prorocentrum sp, dan Protoperidinium sp. The percentage of non-HABs is higher when compared to HABs. The availability of orthophosphate influences the suitability of ecological factors with the development of Non-HABs. Otherwise, HABs are compatible with nitrate, nitrite, ammonia, and silicate.


Keywords


ecological characteristics, estuary, presence of HABs.

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