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All Journal Biosaintifika: Journal of Biology & Biology Education
Mutiatari, Dhita Pracisca
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Agriculture, Biological Sciences & Forestry

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Bioconcentration of Heavy Metals in Milkfish Reared in Stick-Net Pens System: Implications for Open Water Environmental Contamination and Food Safety Martuti, Nana Kariada Tri; Falisah, Dwi Fiska; Sidiq, Wahid Akhsin Budi Nur; Melati, Inaya Sari; Mutiatari, Dhita Pracisca; Nayam, Nasir
Biosaintifika: Journal of Biology & Biology Education Vol. 16 No. 1 (2024): April 2024
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/biosaintifika.v15i1.3501

Abstract

The coast of Tanjung Mas, Semarang City, is an industrial area used by the community to cultivate milkfish using stick-net pens. Furthermore, heavy metal contamination such as Cr, Cd, Cu, and Pb potentially disrupts milkfish meat's growth, quality, and safety. This study aims to determine heavy metals concentration in the waters and milkfish meat in stick-net pens cultivation in Tanjung Mas, Semarang City. The study was conducted using exploration, with five observation sites representing household waste disposal flow, industrial discharge, open sea, and intermediate areas. The observation sites were selected based on the milkfish cultivation activity. The sample and data, including water, milkfish, and environmental factors (temperature, pH, salinity, water current, and dissolved oxygen), were collected three times every two weeks. The heavy metals were detected using Atomic Absorption Spectrometry (AAS). The highest heavy metal concentration is Cr, which ranges from 1.70 ± 0.32 ppm to 2.36 ± 0.63 ppm in milkfish and 2.77 ± 0.65 ppm to 3.05 ± 0.58 ppm in the environment. The heavy metals contamination in Semarang City’s water areas is still relatively low and has no impact on milkfish growth. Industrial waste, mainly heavy metals, potentially threatens the stick-net pens cultivation model developed by the community in Semarang City. This study can be used as an input for mitigation and adaptive action in anticipating future environmental changes and maintaining their business sustainability.
Coastal Erosion Reduces Resilience and Disrupts Compositional Dynamics of The Mangrove Ecosystem Irsadi, Andin; Jabbar, Abdul; Dewi, Nur Kusuma; Somantri, Dadang; Khair, Amar Sharaf Eldin; Sidiq, Wahid Akhsin Budi Nur; Mutiatari, Dhita Pracisca; Martuti, Nana Kariada Tri
Biosaintifika: Journal of Biology & Biology Education Vol. 17 No. 1 (2025): Inpress April 2025
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/biosaintifika.v17i1.17292

Abstract

Indonesia’s coastline, particularly Kendal Regency in Central Java, faces critical mangrove degradation due to land-use changes and rising sea levels. This study aims to asses the condition and erosion impacting Kendal's mangrove ecosystems to inform future conservation strategies. Using remote sensing technology, multi-spatial and multi-temporal imagery from 2005–2023 was analyzed and validated with field observations to evaluate mangrove species composition, structure, and land changes. The mangrove area increased by 52% in three locations, with the Bodri River delta (Pidodo Kulon and Pidodo Wetan villages) showing the most significant growth at 76.69 hectares. Ngebum Beach (Mororejo) had the largest proportional increase, reaching 185%. The ecosystems are moderately diverse, containing at least 11 mangrove species, though Rhizophora dominates due to extensive planting efforts. Despite stable conditions, these ecosystems face threats from deforestation for aquaculture, the primary driver of land erosion, compounded by rising sea levels. Although mangrove areas have expanded significantly, ongoing challenges include erosion, anthropogenic pressures, and limited species diversity. Future strategies must involve multi-stakeholder collaboration to implement sustainable practices, promote species diversity, develop erosion mitigation models, and conduct awareness campaigns to ensure the resilience of Kendal’s mangrove ecosystems.
Co-Authors Abdul Jabbar Andin Irsadi Falisah, Dwi Fiska Khair, Amar Sharaf Eldin Melati, Inaya Sari Nana Kariada Trimartuti Nayam, Nasir Nur Kusuma Dewi Somantri, Dadang Wahid Akhsin Budi Nur Sidiq, Wahid Akhsin Budi Nur