Abstract. Hilmi E, Sari LK, Cahyo TN, Muslih, Mahdiana A, Samudra SR. 2021. The affinity of mangrove species using Association and Cluster Index in North Coast of Jakarta and Segara Anakan of Cilacap, Indonesia. Biodiversitas 22: 2907-2920. The affinity of mangrove species using association and cluster index describe relationship among mangrove species. The species association and clustering explain the degree of utilization of resources and space by mangrove species. The association and cluster also describe specific species adaptation in mangrove ecosystems. This paper was aimed to analyze species affinity using association and clustering index of mangrove species. The association index used Chi-square equation and the clustered index used Euclidian distance analysis. The results showed that (i) mangrove density in Segara Anakan (166-4000 trees ha-1) > North Jakarta (220-1100 trees ha-1). (ii) Nypa fruticans, Avicennia marina, Rhizophora stylosa and Rhizophora apiculata dominated in Segara Anakan of Cilacap, and Rhizophora stylosa and Avicennia marina dominated in North Jakarta (iii) The association index had 12 pairs of negative species association and 17 pairs of positive species association, but most of mangrove vegetations had no association. (iv) mangrove ecosystem in Segara Anakan and North Jakarta had four clusters with Euclidean distance (ED score) 484 to describe cluster between Bruguiera parviflora-Bruguiera sexangula until 76430847 to describe cluster among Bruguiera gymnorrhiza, Bruguiera parviflora, Ceriops decandra, Exoecaria agallocha, Nypa fruticans, Ceriops tagal, Rhizophora stylosa, and Sonneratia caseolaris
Rawa Pening is a semi natural lake which is utilized for hydro-electric power plant, caged fish culture, irrigation, and tourism. It belongs to one of the fifteen lakes which receives national priority to be saved and preserved because of its very poor condition as a result of eutrophication, sedimentation and degraded water quality. Eutrophication of Rawa Pening comes from the Water Catchment Area, originating from farms, animal husbandry, domestic and industrial waste around the lake, and also from the water body itself, that is from caged fish culture. The fertility criteria of the lake water can be determined on the basis of the abundance and variety of phytoplankton and the total phosphorus content. The aim of this research is to find out the water fertility criteria of Lake Rawa Pening based on the abundance and variety of phytoplankton, and the phosphorus content. Research began in July 2012 on three stations. Station I is an area with fishcage culture; Station II is an area without fishcage culture, and Station III is the river inlet or water catchment area. Each station consisted of three different sampling areas. The phytoplankton abundance at the station without fishcage culture is higher (19012 ind/l) than at the fishcage culture station (14356 ind/l) as well as at the inlet station (11058 ind/l), but the diversity index at the no fishcage station is lowest (1.80) compared to the fishcage culture station (2.32) and the inlet station (2.05). The fertility criteria of Rawa Pening based on the phytoplankton abundance and P-total of its water is eutrophic going towards hypereutrophic. Keywords : Lake Rawa Pening, Phosphorus, Water Quality, Euthropication
Abstract. Hilmi E, Sari LK, Siregar AS, Sulistyo I, Mahdiana A, Junaedi T, Muslih, Pertiwi RPC, Samudra SR, Prayogo NA. 2021. Tannins in mangrove plants in Segara Anakan Lagoon, Central Java, Indonesia. Biodiversitas 22: 3508-3516. Mangrove tannin is polyphenol compound and extractive matter in mangrove vegetation. Mangrove tannins have the potentials to support paint industry, animal feed, tanners and wood adhesives industry. This research is aimed to investigate the mangrove species in Segara Anakan, Central Java, Indonesia that produce tannins, and to analyze the distribution and contents of tannin in the part of mangrove plant. A total of 342 samples from 19 mangrove species was collected from 37 sampling points in Segara Anakan. UV-Visible Spectrophotometry was used to analyze the tannin content in the samples. The results showed that the tannins contained in bark and stems were higher (66.6%) than those in leaves (33.4%). Mangrove vegetation can be classified into five classes in terms of tannin percentage with Heritiera littoralis, Nypa fruticans, and Rhizophora mucronata had highest tannin percentage. The clustering analysis of mangrove tannin showed that Ceriops decandra-Ceriops tagal, Acacia auriculiformis-Sonneratia alba, Sonneratia caseolaris-Xylocarpus granatum, and Avicennia marina-Rhizophora apiculata had high similarity of tannin percentage. The distribution of tannins in mangrove species is as follow: 0.59-10.14 kg trees-1 (bark and stem of mangrove diameter > 10 cm) and 0.20-3.74 kg trees-1 (leaves of mangrove diameter > 10 cm) until 8.84-158.96 kg trees-1 (bark and stem of mangrove diameter > 40 cm) and 4.60-91.65 kg trees-1 (leaves of mangrove diameter > 40 cm). R. mucronata and R. apiculata had the highest total tannin content, ranged between 386.60-460.38 kg trees-1.
Abstract. Samudra SR, Fitriadi R, Baedowi M, Sari LK. 2022. Pollution level of Banjaran River, Banyumas District, Indonesia: A study based on the Saprobic Index of periphytic microalgae. Biodiversitas 23: 1527-1534. The saprobic index of periphytic microalgae can be used to determine the level of water pollution based on the number and composition of species. Banjaran River is one of the rivers in the Banyumas District, Central Java, Indonesia, which is widely used by the local people for daily activities. The increase of domestic and agricultural activities in the river triggers an increase in the pollutants input into the river. This study aims to determine the status of the waters in the midstream of Banjaran River by using the periphytic microalgae saprobic index as a bioindicator of water quality. Purposive sampling method was used in this study by establishing four stations and five replications at each station. The result showed that the abundance of periphytic microalgae ranged from 7,547-8,733 cells/cm2; the diversity index ranged from 1.64-2.07 (moderately polluted waters); the dominance index ranged from 0.21-0.26 (no particular species of periphytic microalgae dominating the four stations); and saprobic index value of Banjaran River ranged from 1.00 to 1.03 which indicates that Banjaran River belongs to ?-meso/oligo saprobic water. In other words, it was water with a light pollution level. An action to reduce organic pollution is necessary, one of which is by reducing the people's activities such as washing and disposing of household waste into the river so that the condition of Banjaran River can be maintained properly and reduce pollution in its subsequent river flows.
Desa Kebumen merupakan desa yang berada di Kecamatan Baturraden, Kabupaten Banyumas, Jawa Tengah. Rata-rata kepala keluarga di desa ini adalah buruh, sehingga perekonomian keluarga terdampak pada saat pandemi Covid-19. Sejauh ini, banyak warga di Desa Kebumen belum memiliki kemampuan atau keahlian yang dapat menjadi modal untuk berwirausaha. Namun kendala yang dialami adalah tidak ada fasilitator yang memberikan keterampilan usaha di masa pandemi serta tidak ada anggaran dari dana desa. Anggaran desa banyak terserap untuk penanggulangan Covid-19. Tujuan dari kegiatan ini adalah memberikan pendampingan keterampilan usaha bagi Kader PKK Desa Kebumen melalui kegiatan pelatihan pembuatan nugget ikan. Kegiatan pengabdian masyarakat di Desa Kebumen sebagai salah satu upaya dalam meningkatkan perekonomian masyarakat di masa pandemic Covid-19. Metode pelaksanaan kegiatan adalah Participatory Rural Appraisal (PRA) yaitu dengan mempraktekkan langsung pembuatan nugget ikan, dimulai dari mencincang daging, mencampur bahan-bahan menjadi adonan nugget, mengukus, memotong adonan, membalur adonan dengan tepung panir, hingga menggoreng nugget menjadi siap makan. Selain itu partisipan juga diminta untuk mengisi kuisioner mengenai kegiatan pengabdian masyarakat ini. Hasil dari kegiatan pelatihan yaitu meningkatnya pengetahuan dan keterampilan kader PKK dalam mengolah produk ikan modern, serta memunculkan ide kreatif untuk menciptakan peluang usaha yang berguna meningkatkan pendapatan keluarga di masa pandemi Covid-19. Berdasarkan data hasil kuisioner, diketahui bahwa seluruh peserta pelatihan merasakan manfaat dari adanya pelatihan pembuatan nugget ikan. Pelatihan yang diberikan oleh tim pengabdian kepada masyarakat kepada Kader PKK Desa Kebumen, Kecamatan Baturraden dinilai sangat bermanfaat menambah pengetahuan dalam mengolah ikan air tawar menjadi panganan modern yang layak jual. Peserta sangat antusias dalam mengikuti seluruh rangkaian kegiatan pelatihan pembuatan nugget ikan dan mengungkapkan bahwa kegiatan ini dapat menjadi modal ide untuk melakukan usaha di masa pasca pandemi Covid-19.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.