The practice of tin mining, especially in the Pedindang Sub-Watershed, Central Bangka Regency, Bangka Belitung Province was not carried out carefully and protectively because it produced soil damage or land degradation. The purpose of this study was to examine soil properties, particularly soil physical properties, and soil damage in the Pedindang Sub-Watershed with various land uses, namely tin mining, forests, dryland agriculture and thicket shrubs-bushes, on various slope classes. The properties of the soil studied were the content of organic matter, sand, silt, clay; bulk density; porosity, and soil permeability. Compared to other land use (forest, dryland agriculture and shrubs) in the Pedindang Sub-Watershed area, tin mining land use show the worst soil properties. Soils in tin mining land use were degraded, has very low organic matter content; the lowest clay content; the highest soil density as indicated by high bulk density and low soil porosity; and the highest sand content so that it can be understood if it has the highest and very fast soil permeability.

The community's active involvement in resolving issues and challenges in the field determines the effectiveness of the conservation initiative. A socialization program with the focus on wildlife conservation is required to enhance awareness and conservation efforts for the neighborhood surrounding the Bukit Mangkol Forest Park. The objective of this community service is to raise the younger generation's understanding and awareness of environmental preservation, particularly with regard to the typical Bangka Belitung wildlife found in the Bukit Mangkol Forest Park. Socializing and discussing are the methods of community service. The socialization's outcomes demonstrated that there was an improvement in participant understanding of wildlife threats, wildlife conservation strategies, and actual action taken by participants to protect nature for sustainable development.

Aktifitas kegitan manusia di dalam DAS Pedindang secara langsung mempengaruhi keadaan fisik lahan, kualitas air, dan kinerja DAS Pedindang. Aktifitas kegiatan penambangan merupakan salah satu faktor yang mengakibatkan kerusakan tanah, menurunnya kualitas air dan meningkatnya aliran permukaan. Tujuan penelitian ini adalah: i) menganalisis kualitas air di DAS Pedindang pada daerah hulu dan daerah lain yang mengalami pencemaran; ii) menganalisis tingkat kerusakan tanah yang berada di DAS Pedindang pasca penambangan timah; iii) mengevaluasi kinerja DAS Pedindang dengan pendekatan Koefisien Regim Aliran (KRA) dan Koefisien Aliran Tahunan (KAT). Penelitian ini menggunakan metode analisis tumpangtindih GIS serta penilaian ambang batas kerusakan tanah, penilaian ambang batas kualitas air dan kinerja DAS dengan penilaian KRA dan KAT. Hasil evaluasi DAS Pedindang menunjukkan bahwa kondisi kualitas air dalam DAS pedindang mengalami penurunan di wilayah hilir akibat aktifitas tambang, sehingga perlu adanya penanganan tanah tambang.

Lactic acid bacteria (LAB) are a group of bacteria that are naturally present in the digestive tract of vertebrates, including fish such as Channa sp. Lactic acid bacteria are considered the most suitable microbes for use as probiotics. Probiotics can produce antimicrobial metabolites so that can improve the microbial balance in the digestive tract. It is believed that Channa sp. harbors LAB in its digestive tract, which may have probiotic potential and produce antimicrobial metabolites that can inhibit pathogenic bacteria. The aim of this study was to isolate and identify LAB from the intestines of Channa sp. The research involved several steps, including sample preparation, LAB isolation, characterization, and purification of bacterial isolates, biochemical tests, temperature resistance tests, antimicrobial tests, haemolysis tests, lactic acid production tests, and cholesterol-lowering activity tests. Eight LAB isolates with potential probiotic characteristics were isolated and identified as the genus Lactobacillus, which are gram-positive bacteria that produce lactic acid during culture