Vegetation is one of the components that affect turtle habitat.Therefore, it is necessary to know the vegetation that becomes a character for turtles in the process of laying eggs.This observation aims to identify the types of vegetation in some sectors of landing egg-laying turtles.The method carried out is a direct survey on the ground, and the results obtained found 10 types of vegetation from the same three sectors including tree habitus, perdu and herbaceous.Pandanus tectorius, Scaevolla taccada, and Hibiscus tiliaceus are the dominant species in the sector.Keywords: turtle habitat, vegetationAbstrakVegetasi merupakan salah satu komponen yang berpengaruh bagi habitat penyu. Oleh karena itu perlu diketahui vegetasi yang menjadi karakter bagi penyu dalam melakukan proses bertelur. Pengamatan ini bertujuan untuk identifikasi jenis-jenis vegetasi pada beberapa sektor mendaratnya penyu bertelur. Metode yang dilakukan adalah survey langsung di lapangan, dan hasil yang diperoleh ditemukan 10 jenis vegetasi yang sama dari ketiga sektor diantaranya habitus pohon, perdu dan herba. Pandanus tectorius, Scaevolla taccada, dan Hibiscus tiliaceus merupakan spesies yang mendominasi di sektor tersebut.Kata Kunci: habitat penyu, vegetasi.
This study aims to determine the rate of decomposition and the nutrient content of carbon (C-org), nitrogen (N) and phosphorus (P) of mangrove leaf litter released during the decomposition process. The method used is purposive sampling, where the determination of observation stations is based on the year of mangrove planting, namely 2007, 2010, 2013 and 2016. The analysis of litter decomposition rate uses the Boonruang equation, C-org uses the Walkley & Black method, N uses the Kjeldahl method and P uses the wet destruction method. The results showed that the most significant decomposition rate occurred in the 2016 planting year litter of 71.924%, followed by 2007, 2010 and 2013 planting years with a value of 58,582%, 55,360% and 47,048%, respectively. The highest nutrient content of C-org and P was found in mangroves in the 2010 planting year with values of 50.82 and 0.14 ppm, and the highest N nutrient content was in the 2007 planting year with a value of 1.25%. In conclusion, the mangrove leaf litter during the research was not completely decomposed. The decomposition process in the 2010 planting year had the highest C-org and P-released nutrients. The highest N nutrient content was found in the 2007 planting year. Keywords: Decomposition Rate, Mangrove, Litter
Abstrak: Tanaman mangga merupakan tanaman yang mudah ditemukan di masyarakat dan kaya akan manfaat. Daun mangga dapat menjadi obat alternatif penyakit diabetes dan kolesterol, akan tetapi belum sejalan dengan pemanfaatannya. Hal ini diduga karena kurangnya informasi dan pengetahuan masyarakat tentang pengelolaan daun mangga. Tujuan PKM ini adalah memberikan pengetahuan dan keterampilan pemanfaatan daun manga dan pengolahannya menjadi teh herbal. Metode pelaksanaan dilakukan dengan cara sosialisasi yaitu dengan cara interaktif tentang potensi mangga, demonstrasi cara pembuatan teh dari daun mangga dan pendampingan pelatihan kepada peserta tentang cara pembuatan teh daun mangga. Hasil kegiatan menunjukkan terjadi peningkatan pengetahuan dan keterampilan peserta tentang potensi, peluang, teknik serta proses pembuatan teh herbal daun mangga, hal ini dibuktikan dengan kemampuan para peserta membuat dan menghasilkan produk teh herbal daun mangga selama kegiatan berlangsung.Abstract: The Mango plant is one of the plants that are found in many communities and rich in benefits.Mango leaves can treat various diseases such as diabetes and cholesterol but have not been in line with their utilization. This is thought to be due to the lack of information and public knowledge about the management of mango leaves. This PKM aims to provide knowledge and skills of mango leaf utilization and its processing into herbal tea. The implementation method is carried out by socialization, namely by interactive ways about the potential of mango, demonstration of how to make tea from mango leaves and training assistance to participants on how to make mango leaf tea. The results of the activity showed an increase in participants' knowledge and skills about the potential, opportunities, techniques and process of making manga leaf herbal tea, this is evidenced by the ability of the participants to make and produce mango leaf herbal tea products during the activity.
The land for mangrove forest rehabilitation in Setapuk Besar Village, North Singkawang District is quite alarming due to abrasion and seawater intrusion. Leaf litter decomposition of Rhizophora spp. produce essential nutrients that function as a source of food and support the life of mangrove plants. The purpose of this study was to calculate the rate of decomposition of leaf litter of mangrove Rhizophora spp. in the rehabilitation area of mangrove forests and obtain the amount of nutrient content (C-organic, N, P) from mangrove leaf litter released during the decomposition process. This study uses a survey method with a purposive technique with reference to the category of planting year (2007, 2010, 2013 and 2016). Rhizophora spp. leaf litter decomposition rate. The highest was found at station II with a value of 0.13 (gr/day) while the lowest decompositcccpion rate was found at stations II, III and IV with a value of 0.12 (gr/day). The highest value of carbon (C-organic) content was found at station II at 52.39%, the lowest value was at station IV at 49.20%. The highest value of nitrogen content was found at station I of 1.21%, while the lowest value was found at station IV at 0.76%. The highest value of phosphorus nutrient content was found at station III of 0.30%, while the lowest value was found at station II of 0.25%.Keywords: Decomposition Rate, Litter, Mangrove AbstrakLahan rehabilitasi hutan mangrove yang berada di Kelurahan Setapuk Besar Kecamatan Singkawang Utara cukup memprihatinkan yang disebabkan oleh abrasi dan intrusi air laut. Penguraian serasah daun Rhizophora spp. menghasilkan unsur hara yang esensial berfungsi sebagai sumber makanan dan penyangga kehidupan tanaman mangrove. Tujuan dari penelitian ini adalah menghitung nilai laju dekomposisi serasah daun mangrove Rhizophora spp. di lahan rehabilitasi hutan mangrove dan mendapatkan jumlah kandungan unsur hara (C-organik, N, P) dari serasah daun mangrove yang dilepas selama proses terurai. Penelitian ini menggunakan metode survei dengan teknik purposive dengan mengacu pada kategori tahun tanam (2007, 2010, 2013 dan 2016). Laju penguraian serasah daun Rhizophora spp. tertinggi terdapat pada stasiun II dengan nilai sebesar 0,13 (gr/hari) sedangkan untuk laju penguraian terendah terdapat pada stasiun II, III dan IV dengan nilai sebesar 0,12 (gr/hari). Nilai kandungan Karbon (C-organik) tertinggi terdapat pada stasiun II sebesar 52,39%, nilai terendah terdapat pada stasiun IV sebesar 49,20%. Nilai kandungan Nitrogen yang tertinggi terdapat pada stasiun I sebesar 1,21%, sedangkan nilai terendah terdapat pada stasiun IV sebesar 0,76%. Nilai kandungan unsur hara Posfor tertinggi terdapat pada stasiun III sebesar 0,30%, sedangkan nilai terendah terdapat pada stasiun II sebesar 0,25%.Kata kunci: Laju penguraian, mangrove, serasah, Setapuk Besar
Macrobenthos is one of the organisms that play an essential role in the decomposition process of mangrove plant litter. Other organisms then use the result of the decomposition process in mangrove forests. Still, the existence of these organisms is susceptible to environmental changes, so it is often interpreted as one of the indicators of habitat quality. This research aims to determine the sustainability and diversity of macrobenthos as an indicator of habitat quality in mangrove forests. Data collection is carried out by the plot cluster method. Sample deflating points using purposive sampling. Cluster plots are placed on three observation stations with different conditions, namely natural mangrove forests (station 1), former pond areas (station 2), and areas adjacent to agricultural land (station 3). Each station has three plots measuring 10 x 10 meters to record tree level mangrove vegetation. Each plot has five subplots measuring 1 x 1 meter to take macrobenthos samples. The total number of plots is nine plots for mangrove vegetation and 45 subplots for macrobenthos. The results showed that macrobenthos ability ranged from 10 individuals / m2 to 15 individuals / m2, with the diversity index ranging from 1.49 to 1.73. This condition illustrates that mangrove habitat is included in the medium classification in other words, based on the state of the structure of the biota Bentos community in the mangrove forest in Siantan District, Mempawah regency is fairly a stable category.
This study aims to examine the existence of Augmented Reality as a learning medium in the era of modernization. The method used in this study is a literature study. The result of this research is that Augmented Reality has a good influence as a learning medium so that it is able to keep up with the development of technology. The conclusion of this study is evident from the research articles that were carried out earlier.
This research is intended to describe the variety of languages used in Apa Kabar Indonesia Part 2 talk show for the May, 2020 period and find out its implications for Indonesian Language for high school. Moreover, this research used a descriptive-qualitative design and its data sources are taken from the conversation between the host and the guest stars in this event in which the gained data are focused on the conversation contained the variety of languages. Based on the data analysis, it was found that the variety of languages used in Apa Kabar Indonesia Part 2 talk show for the May, 2020 period is based on four aspects (1) the aspects of speakers dialect, colloquial, and jargon, (2) terms of use; for journalism context, (3) terms of formality formal, business, and relaxed, (4) terms of media oral form.
Tujuan penelitian ini adalah 1)”Untuk mengetahui proses pembentukan portofolio optimal menggunakan perhitungan model indeks tunggal.” 2) Untuk mengetahui apakah ada perbedaan saham portofolio optimal dan saham yang tidak membentuk portofolio optimal. 3)”Untuk mengetahui seberapa besar proporsi dana masing-masing saham portofolio optimal yang terbentuk pada IDX30 di Bursa Efek Indonesia periode Februari 2015 sampai dengan Januari 2018.” Desain penelitian ini adalah deskriptif kuantitatif. Populasi yang digunakan adalah seluruh saham yang termasuk dalam IDX30 yang berjumlah 42 saham. Teknik pemilihan sampel menggunakan purposive sampling dengan data yang jadikan sampel sebanyak 21 saham. Hasil analisis didapatkan ada 2 saham yang membentuk portofolio optimal berdasarkan Model Indeks Tunggal yaitu saham ICBP sebesar 0.02174 atau 2.17% dan saham UNTR sebesar 0.02447 atau 2.47%. Saham yang dijadikan kandidat portofolio merupakan saham yang nilai Excess Return to Beta (ERB)nya lebih besar dari nilai cutt-off-point (ERB ≥ C*) C* = 0.018300733. Kata kunci :”Portofolio Optimal, Model Indeks Tunggal, IDX30.”
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