Abstract. Maulidyna A, Hartawan BS, Agustin HN, Irfan AN, Septiasari A, Utina R, Setyawan AD. 2019. Review: The role of local belief and wisdom of the Bajo Community in marine conservation efforts. Intl J Bonorowo Wetlands 11: 48-63. The Bajo tribe are originally sea nomads, living in eastern Indonesia, South Philippines and North Borneo. They are identified by their marine culture and sama language. They have similarities with the Orang Laut tribe in western Indonesia and the Moken tribe in the Mergui Archipelago in terms of exploring the seas. Today, most Bajo ethnic groups no longer wander on houseboat and live in a certain place, although they still preserve maritime culture, they have similar social and cultural features, including shared shipbuilding and fishing, traditions, beliefs and myths. The Bajo tribe who live from marine natural resources have a close relationship with the marine and coastal environment, so that it raises the values of environmental concern in maintaining the sea and coast. This study aims to determine the environmental conservation of the Bajo tribe based on their beliefs. The Bajo tribe is one of the tribal communities that manage, maintain and utilize marine biological resources based on cultural norms and values that have been institutionalized and attached to the Bajo community, and are maintained through social control based on their belief system. This belief brings the Bajo people to fear breaking the taboo or pamali that has existed since their ancestors orally and from generation to generation. The Bajo people have wisdom to protect the marine environment, namely corals, mangroves, and marine resources. They have a high concern for preserving coral reefs as a buffer for the underwater ecosystem, and they are very aware of the need to preserve the sources that are the basis of their livelihood fulfillment.
Abstract. Maulidyna A, Alicia F, Agustin HN, Dewi IR, Nurhidayah I, Dewangga A, Kusumaningrum L, Nugroho GD, Jumari, Setyawan AD. 2019. Review: Economic impacts of the invasive species water hyacinth (Eichhornia crassipes): Case study of Rawapening Lake, Central Java, Indonesia. Intl J Bonorowo Wetlands 11: 18-31. Introduced species is defined as a conscious or unconscious effort to present a species of animal or plant into a new habitat. Introduced species have two pathways on their biogeographical distribution, namely becoming an invasive species or not becoming an invasive species. An introduced species which does not have a negative impact on the new habitat is not classified as an invasive species, while a species that is introduced and does have a negative impact on the new habitat is considered as invasive species. One of the problems that threaten freshwater ecosystems in Indonesia is the invasion of water hyacinth (Eichhornia crassipes). This introduced plant species can reproduce rapidly, both generatively and vegetatively, and form very dense masses in water bodies, such as swamps, lakes, rivers, and channels including in Rawapening Lake in Semarang District, Central Java, Indonesia. This study is aimed to review the economic impacts of the invasive water hyacinth species in Rawapening Lake from two perspectives: the negative and the positive impacts, so that feasible solutions can be developed. There are several negative impacts caused by water hyacinth in Rawapening Lake. The overgrown water hyacinth in the lake hinders the fishermen in maneuvering the boats and fishing gears, reducing the fish catches. The extensive coverage of water hyacinth causes the reduction in soluble oxygen and blocks sunlight into the water, leading to the decline of fish population. The rotten water hyacinth can obstruct the irrigation channels of the fields so that farmers cannot produce maximum rice harvests and eradicating them would incur financial costs. On the other hand, there are also positive impacts of water hyacinth in Rawapening Lake. This plant can be used as raw materials to produce a variety of handicrafts in the form of bags, sandals, baskets, wallets, and furniture such as chairs and tables. Water hyacinth can also be processed in biogas production and organic fertilizers. With careful management, water hyacinth can remediate polluted water caused by heavy metals contamination. In short, economically, the presence of water hyacinth in Rawapening can be both beneficial and detrimental. Proper management of this species is necessary to maintain the sustainability of this aquatic environment. r
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