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All Journal Biodiversitas Journal of Biological Diversity
ROZIRWAN ROZIRWAN
Department of Marine Science, Faculty of Mathematics and Natural Sciences, Universitas Sriwijaya. Jl. Raya Palembang-Prabumulih Km. 32, Ogan Ilir 30862, South Sumatra, Indonesia
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology

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Environmental risk assessment of Pb, Cu, Zn, and Cd concentrations accumulated in selected mangrove roots and surrounding their sediment ROZIRWAN ROZIRWAN; NADILA NUR KHOTIMAH; WIKE AYU EKA PUTRI; FAUZIYAH FAUZIYAH; RIRIS ARYAWATI; NURHAYATI DAMIRI; ISNAINI ISNAINI; REDHO YOGA NUGROHO
Biodiversitas Journal of Biological Diversity Vol. 24 No. 12 (2023)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d241236

Abstract

Abstract. Rozirwan, Khotimah NN, Putri WAE, Fauziyah, Aryawati R, Damiri N, Isnaini, Nugroho RY. 2023. Environmental risk assessment of Pb, Cu, Zn, and Cd concentrations accumulated in selected mangrove roots and surrounding their sediment. Biodiversitas 24: 6733-6742. Mangroves as the largest coastal ecosystem can accumulate heavy metals from their environment. This study aimed to evaluate the environmental risk associated with heavy metal pollution accumulated in the roots of mangroves and the surrounding sediments. The mangrove roots consisted of three species Sonneratia caseolaris, Rhizopora apiculata, and Xylocarpus granatum, collected from three observation stations within the Payung Island mangrove ecosystem in South Sumatra, Indonesia. The concentrations of heavy metals were determined using atomic absorption spectrometry. Statistical analysis employed one-way Analysis of Variance (ANOVA). At the same time, ecological risk assessment utilized the Bioconcentration Factor (BCF), Geoaccumulation Index (Igeo), Contamination factor (Cf), and Pollution Load Index (PLI). The highest sediment concentrations of heavy metals at station 3 were 12.786±0.26 mg/kg for Pb, 10.413±0.011 mg/kg for Cu, 42.752±0.053 mg/kg for Zn, and Cd was not detected. In mangrove roots, the highest concentrations were found in S. caseolaris, with 2.596±0.002 mg/kg for Pb and 11.881±0.015 mg/kg for Zn, while X. granatum exhibited 8.850±0.011 mg/kg for Cu and 0.160±0.020 mg/kg for Cd. BCF values <1 were categorized as exclusion, Igeo<0 indicated non-contamination, Cf<1 signified low pollution, and PLI<0 denoted an unpolluted status. Based on the results, the quality of the mangrove ecosystems affected by heavy metal pollution is currently considered safe regarding environmental risk assessment.
Implication of microplastic presence in sediment and blood clams Anadara granosa (Mollusca: Bivalvia) in the Musi Estuary, Indonesia M. AKBAR RAHMAN; ROZIRWAN ROZIRWAN; WIKE EKA AYU PUTRI; GUSTI DIANSYAH; MELKI MELKI; ICA DELYA; REDHO YOGA NUGROHO
Biodiversitas Journal of Biological Diversity Vol. 26 No. 4 (2025)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d260422

Abstract

Abstract. Rahman MA, Rozirwan, Putri WEA, Diansyah G, Melki, Delya I, Nugroho RY. 2025. Implication of microplastic presence in sediment and blood clams Anadara granosa (Mollusca: Bivalvia) in the Musi Estuary, Indonesia. Biodiversitas 26: 1720-1733. Microplastic pollution poses a serious risk to estuarine ecosystems, affecting sediments and benthic species. Blood clams Anadara granosa represent a significant commercial seafood product in Indonesia, including those from the Musi Estuary. This study investigated the risks associated with microplastic contamination in sediments and A. granosa in the Musi Estuary, located in South Sumatra, Indonesia. Sediment samples were extracted using sodium chloride (NaCl, 1.2 g cm-3) and hydrogen peroxide (30% H2O2). In contrast, A. granosa samples were digested with 10% KOH for microplastic extraction. The abundance and shape of microplastics were analyzed from both samples. Pollution risk assessment was conducted through the calculation of the Pollution Load Index (PLI), Nemerow Pollution Index (NPI), and Bioconcentration Factor (BCF). The results revealed the presence of microplastics in sediments, with a mean abundance of 1.31±0.41 particles/g dw, while in A. granosa, it was 21.05±10.31 particles/ind. Both samples exhibited high microplastic bioaccumulation (NPI>2), although the pollution load remained relatively low (minor category, PLI<10). The bioconcentration factor between A. granosa and sediment was determined to be 23.28, indicating that the A. granosa absorbed microplastics present in the sediment. These findings highlight the significant bioaccumulation potential of microplastics in A. granosa within the Musi Estuary. The local community and government need to establish mitigations for future microplastic management efforts.
Ecological implications of push-net fisheries on demersal fish biodiversity and bycatch in Banyuasin coastal waters, Indonesia HELFA SEPTINAR; FAUZIYAH FAUZIYAH; FITRI AGUSTRIANI; AMANDA ASTRI PRATIWI FEBRIANTI; ELLIS NURJULIASTI NINGSIH; ISNAINI ISNAINI; DADE JUBAEDAH; BAKRI BAKRI; ROZIRWAN ROZIRWAN
Biodiversitas Journal of Biological Diversity Vol. 27 No. 2 (2026)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d270224

Abstract

Abstract. Septinar H, Fauziyah, Agustriani F, Febrianti AAP, Ningsih EN, Isnaini, Jubaedah D, Bakri, Rozirwan. 2026. Ecological implications of push-net fisheries on demersal fish biodiversity and bycatch in Banyuasin coastal waters, Indonesia. Biodiversitas 27 (2): d270224. https://doi.org/10.13057/biodiv/d270224. Push-net fisheries are widely practiced in Indonesian coastal waters but often generate substantial bycatch, posing ecological risks to demersal fish communities and near-threatened species. This study examined the catch composition, species diversity, and ecological linkages of push-net fisheries in the Banyuasin coastal waters, South Sumatra, and assessed the environmental drivers influencing assemblage structure. Seven fishing trips comprising 33 hauls yielded 4,157 individuals (115.87 kg total biomass). Data were analyzed using ecological indices, including Relative Abundance (RA), Occurrence Frequency (Fi), Shannon-Wiener Diversity (H’), Pielou’s Evenness (E), Simpson’s Dominance (D), and the standardized Morisita Index (Ip). The main catch (Metapenaeus monoceros, Penaeus merguiensis, Mierspenaeopsis sculptilis, Harpiosquilla raphidea, and Macrobrachium rosenbergii) contributed 51.08% (59.19 kg) of the total catch, while bycatch and discards accounted for 40.33% (46.73 kg) and 8.59% (9.95 kg), respectively. The main catch was dominated by M. monoceros (RA = 35.55%, Fi = 100%) and P. merguiensis (RA = 21.22%, Fi = 100%), defining the core shrimp assemblage. Among the 20 bycatch species identified, Johnius carouna was the most dominant (RA = 21.65%, Fi = 85.71%), while Clibanarius spp. and Lagocephalus spadiceus dominated the discard fraction. Shannon-Wiener diversity (H’ = 0.61-2.08) indicated low to moderate diversity, while evenness (E = 0.17-0.58) and dominance (D = 0.17-0.76) reflected uneven community structure and moderate dominance by a few taxa. The standardized Morisita index (Ip = 0.55-0.87) confirmed clustered distributions. Principal Component Analysis (PCA) explained 68.16% of total variance (F1 = 43.48%, F2 = 24.68%), highlighting strong multivariate associations between environmental variables (dissolved oxygen, temperature, and salinity) and bycatch variation across sampling sites. These findings highlight the influence of environmental variability and fishing pressure on species assemblages and emphasize the need for adaptive, ecosystem-based management to mitigate bycatch and sustain tropical coastal fisheries.
Co-Authors AMANDA ASTRI PRATIWI FEBRIANTI BAKRI BAKRI DADE JUBAEDAH ELLIS NURJULIASTI NINGSIH FAUZIYAH FAUZIYAH FITRI AGUSTRIANI GUSTI DIANSYAH HELFA SEPTINAR ICA DELYA ISNAINI ISNAINI M. AKBAR RAHMAN MELKI MELKI NADILA NUR KHOTIMAH NURHAYATI DAMIRI REDHO YOGA NUGROHO REDHO YOGA NUGROHO RIRIS ARYAWATI WIKE AYU EKA PUTRI WIKE EKA AYU PUTRI