Ecological risk assessment of mercury contaminant has a means to analyze the ecological risk aspect of ecosystem using the potential impact of mercury pollution in soil, water and organism. The ecological risk assessment in a coastal area can be shown by mangrove zonation, clustering and interpolation of mercury accumulation. This research aims to analyze ecological risk assessment of potential mercury (including bioaccumulation and translocation) using indicators of species distribution, clustering, zonation and interpolation of mercury accumulation. The results showed that the Segara Anakan had a high risk of mercury pollution, using indicators like as the potential of mercury contaminant in water body was 0137±0.0137 ppm, substrate and sediment were 0.0134±0.0212 ppm. To reduce the impact of mercury pollution could be conducted by mangrove planting, following the ability of mercury accumulation in stem and bark between 0.011 and 0.064 ppm, in mangrove roots between 0.0260 and 0.0690 ppm and in mangrove leaves between 0.0020 and 0.0120 ppm,. The second indicator of mangrove ability to reduce the impact of mercury contaminant used the indicator of bioaccumulation factors, which had a range between 0.0210 and 0.4751, and the translocation factors were between 0.0459 and 1.0547. The results also showed that: Avicennia marina, Sonneratia alba, Rhizophora apiculate, Rhizophora mucronata and Nypa frutican had a good ability to accumulate and reduce the impact of mercury contamination.
Abstract. Hilmi E, Prayogo NA, Junaidi T, Mahdiana A, Fikriyya N. 2023. Adaptive pattern of mangrove species and the mangrove landscaping in the heavy metal polluted area of Eastern Segara Anakan Lagoon, Indonesia. Biodiversitas 24: 2927-2937. The mangrove species have specific adaptations to exclude, accumulate, translocate, and exert heavy metal contaminants. Mangrove species' adaptation to Cadmium (Cd) and Zinc (Zn) pollution are shown by their ability to reduce the negative impact of Cd and Zn pollution. This research aimed to analyze the adaptive pattern and mangrove landscaping in Cd and Zn contaminant areas of Eastern Segara Anakan (E-SAL), Indonesia. Cd and Zn content in different tissues (stem, leaves, and root) of 15 mangrove species were analyzed using Atomic Absorption Spectrometric method. Adaptive pattern and mangrove landscaping were assessed using bioaccumulation factor (BAF) and translocation factor (TF). The results showed that the Cd accumulation varied between 0.0610-0.2300 ppm in the stem, 0.0140-0.0480 ppm in leaves, 0.1501-0.3100 ppm in roots, whereas Zn accumulation varied between 5.7781-37.3409 ppm in the stem, 2.3973-32.2859 ppm in leaves, 10.8380-35.842 ppm in roots. Relatively Cd and Zn accumulation was highest in root than other parts. BAF scores of Cd and Zn varied between 0.0111-0.1760 and 0.1936-0.9017, respectively. TF score of Cd and Zn varied between 0.0642-0.9414 and 0.3419-1.3057, respectively. Based on the adaptation pattern, the mangrove landscape showed that Avicennia marina (Forssk.) Vierh., Rhizophora mucronata Lam., and Rhizophora apiculata Blume were the best accumulator of Cd contaminants. At the same time, A. marina, R. apiculata, and X. granatum were the best accumulator of Zn contaminant. The conclusion explains that mangrove species significantly adapt to life and grow in Zn and Cd-polluted areas. Therefore, mangrove landscaping can be developed to reduce the impact of Zn and Cd pollution.
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