Ecotourism activities play an essential role in protecting and managing natural habitats and the species found in the habitat and creating economic benefits for the surrounding community. However, some parties state that ecotourism has a negative effect on the environment if it does not correctly follow the area’s rules and the ecotourism activities are not monitored and appropriately assessed. The objective of this study were : (i) to evaluate the diversity of seagrass and associated macrofauna at the Kuta ecotourism site in the Mandalika area of Lombok Island Indonesia and (ii) to know the response of the surrounding community and stakeholders in terms of the role of ecotourism in supporting the sustainability of the seagrass ecosystem in its function as an important factor in maintaining the diversity of marine macrofauna in the area. Data collection methods related to seagrass diversity and associated biota (Bivalves and Echinoderms) were carried out using the line transect method and the quadrat method. Meanwhile, the perception and response data of the community was obtained through observation and interviews. Data analysis was carried out in a qualitative descriptive manner. The results showed that there were 8 species of seagrass found. Seagrass species Syringodium isoetifolium and Cymodocea rotundata have the highest density of about 18.48 ind/m2, and Enhalus acoroides has the highest area of coverage, which is around 16.41 ind/m2. The highest macrofauna diversity was fish (10 families with 16 species) followed by Echinoderms (7 families with 9 species), and Bivalves (5 families with 7 species). Respondents in the fishermen category showed their understanding that ecotourism in their area plays an important role in supporting the sustainability of seagrass ecosystems, and this condition affects maintaining the diversity of associated marine macrofauna. This is supported by the findings that there has been a transition in the use of marine biota fishing gear, namely from the use of tools/methods that are not environmentally friendly to the use of tools/methods that are environmentally friendly. The most encouraging thing is that the use of bombs has completely stopped after ecotourism started in their area. Thus, it can be concluded that the existence of ecotourism in the Mandalika has had a positive influence on the behavior of fishing communities, especially in maintaining the seagrass ecosystem which is important in supporting the sustainability of marine macrofauna biodiversity in the Mandalika, South Coast of Lombok, Indonesia.
Nipah Beach is facing challenges of development, economic growth, and high community demand for land, which may negatively impact the sustainability of sea turtles. To mitigate this issue, the ecosystem of Nipah Beach must be appropriately zoned. The goal of beach ecosystem zonation is to allocate areas around the coast to the community and stakeholders based on the sensitivity of sea turtle habitats. This research aims to 1. Analyze the suitability of Nipah Beach in North Lombok Regency as a sea turtle habitat. 2. Design the zonation of the sea turtle conservation area in Nipah Beach, North Lombok Regency. The study uses an observation method, namely collecting data through direct inspection or careful inspection in the field or research location by dividing Nipah Beach into several observation stations. The results are analyzed using scoring techniques and spatial modeling, resulting in a map. Research results show that the suitability level of Nipah Beach as a sea turtle habitat ranges from 15-46 points, with station two having the highest score and station six having the lowest. Stations two and three, and part of station five are prioritized as protection zone areas, station four and part of station five and one as a captive zone area, and the rest as limited-use zones
Penelitian ini membahas sistem Lorenz modifikasi yang menggambarkan pergerakan angin di atmosfer yang mengalami turbulensi karena adanya perubahan temperatur yang dipengaruhi oleh intensitas gerak fluida, temperatur horizontal serta temperatur vertikal. Sistem ini memiliki tiga parameter real, yaitu parameter yang menentukan distribusi temperatur, nilai yang bergantung dengan keadaan geometri suatu fluida serta nilai perbedaan temperatur antara bagian atas dan bagian bawah lapisan. Analisis dinamik pada sistem ini menentukan titik ekuilibrium, nilai eigen serta menentukan kestabilan dari setiap titik ekuilibrium. Sistem ini memiliki dua titik ekuilibrium. Berdasarkan analisis yang telah dilakukan diperoleh bahwa titik ekuilibrium yang pertama dinyatakan tidak stabil dan titik ekulibrium yang kedua stabil bersyarat. Untuk mengetahui bifurkasi dari sistem ini, diambil 27 kondisi dengan parameter yang berbeda-beda. Dengan mengambil 27 kondisi ini dapat dilihat perubahan kestabilannya. Karena adanya perubahan kestabilan, maka sistem ini termasuk bifurkasi transcritical. Limit cycle yang terbentuk adalah limit cycle stabil karena bagian luar dan dalam limit cycle mendekati limit cycle.
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