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All Journal BIOTROPIA - The Southeast Asian Journal of Tropical Biology Jurnal Biologi Tropis
Rizki, Anis Syakiratur
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Immunology & microbiology Veterinary

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Bioaccumulation of the Heavy Metal Mercury (Hg) and Proximate Content of Gracilaria sp. on Lombok Island Ghazali, Mursal; Adhawati, Laela; Pazila, Baiq Dinda Aluh Putri; Artiningrum, Novitaa Tri; Candri, Dining Aidil; Rizki, Anis Syakiratur; Lestari, Dinda Propita; Hasanto, Rizki Primaditya; Nurhayati, Nurhayati
Jurnal Biologi Tropis Vol. 25 No. 3 (2025): Juli-September
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v25i3.9953

Abstract

One of the dangerous heavy metals that can build up in aquatic biota is mercury (Hg). The purpose of this study was to evaluate the environmental health condition in possibly polluted areas near Pelangan Village, Sekotong Subdistrict, West Lombok, and to ascertain the heavy metal level in Gracilaria sp. Using samples taken from Pelangan, Elak-Elak, and Mentigi, the Atomic Absorption Spectrophotometer (AAS) method was used to analyze non-essential heavy metal pollution in Gracilaria sp. According to the findings, Gracilaria samples taken from the Sekotong Subdistrict's coastline area had the greatest levels of mercury pollution, with 0.05 mg/kg in Elak-Elak and 0.14 mg/kg in Pelangan. On the other hand, samples of Gracilaria sp. from the Mentigi coast in North Lombok did not exhibit any mercury contamination (0.00 mg/kg). The levels of mercury accumulation in Gracilaria sp. are classified as dangerous since they surpass the 0.03 mg/kg maximum permissible limit for mercury in consumable products established by the Indonesian National Standard (SNI 7387:2009). Additionally, Gracilaria substrate samples from Pelangan had a mercury contamination level of 0.05 mg/kg, greater than that of Mentigi and Elak-Elak (both at 0.00 mg/kg). The proximate content of Graciaria sp was influenced by the sampling location but was not influenced by mercury contamination.
POTENTIAL OF CARBON SINK IN MANGROVE SUBSTRATES IN LEMBAR BAY, WEST LOMBOK, INDONESIA Firman, Firman Ali Rahman; Lestari, Dewi Putri; Hadi, Alfian Pujian; Rizki, Anis Syakiratur; Almahyra, Aisha Zea; Alvarendra, Arsya Zafran; Cerminand, Nuzuly Ilmia; Listari, Nening; Kuswara, R. Didi; Gazali, Zulkarnain; Ekaningtias, Maya; Jannah, Siti Wardatul; Pratiwi, Baiq Yulia Hasni
BIOTROPIA Vol. 30 No. 3 (2023): BIOTROPIA Vol. 30 No. 3 December 2023
Publisher : SEAMEO BIOTROP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11598/btb.2023.30.3.1956

Abstract

Mangroves are one of the coastal vegetation that can mitigate carbon (carbon sink and carbon storage). This study aimed to determine the potential for soil carbon stock found under stands of mangroves in Lembar Bay, West Lombok, and West Nusa Tenggara. The research began with the identification of the species and then proceeded toa sampling of the soil, which was then analyzed using the Walkley and Black method. The results showed that there were ten species of mangroves, namely, Rhizophora stylosa, Avicennia lanata, Avicennia marina, Bruguiera gymnorrhiza, Ceriops decandra, Excoecaria agallocha, Lumnitzera racemosa, Scyphiphora hydrophyllacea, Thespesia populnea, and Xylocarpus maluccensis. The highest soil carbon content percentage was found in the lower soil of the A. lanata (1.43 %C) mangrove, and the lowest was found in the lower-stand soil of E. agallocha (0.21 %C). Meanwhile, the carbon sinks per meter were 0.002-0.066 gC/m2, with an average of 0.020±0.020 gC/m2. The estimated total soil carbon sink in 10 mangrove stands was 0.20-6.60 tons C/ha, with an average of 2.18±2.010 tons C/ha. The average total estimated soil carbon stock found in 20.49 ha of the mangrove area studied was 44.67 tonsC, which is equivalent to 263.69 tonsC in a mangrove area of ​​120.96 ha in Lembar Bay.
Co-Authors Adhawati, Laela Almahyra, Aisha Zea Alvarendra, Arsya Zafran Artiningrum, Novitaa Tri Baiq Yulia Hasni Pratiwi Cerminand, Nuzuly Ilmia Dewi Putri Lestari, Dewi Putri Dining Aidil Candri, Dining Aidil Firman, Firman Ali Rahman Gazali, Zulkarnain Hadi, Alfian Pujian Hasanto, Rizki Primaditya Jannah, Siti Wardatul Kuswara, R. Didi Lestari, Dinda Propita Listari, Nening Maya Ekaningtias Nurhayati, Nurhayati Pazila, Baiq Dinda Aluh Putri