bluuebunny/crossref_metadata_2025_split huggingface dataset:
VALUASI EKONOMI OBJEK WISATA TREKKING MANGROVE, GRAND MAERAKACA TAMAN MINI JAWA TENGAH DAN POTENSI PENGEMBANGANNYA
Authors: Alviani Nadya Nurita , Suprapto Djoko , Wijayanto Dian 
Published: September 2020

Grand Maerakaca merupakan salah satu objek wisata yang ada di Semarang, yang memiliki daya tarik yaitu Trekking Mangrove. Penelitian ini bertujuan untuk mengetahui karakteristik penggunjung, persepsi pengunjung mengenai potensi pengembangan objek wisata dan menghitung nilai ekonomi Objek Wisata Trekking Mangrove menggunakan metode Travel Cost Method (TCM) dan Willingness to Pay (WTP). Jumlah responden dalam penelitian ini adalah 100 orang. Teknik pengambilan data pada penelitian ini menggunakan Convinience Sampling. Hasil penelitian menunjukkan bahwa karakteristik pengunjung Objek Wisata Trekking Mangrove, Grand Maerakaca mayoritas adalah pelajar/mahasiswa dan karyawan swasta yang berumur 15-25 tahun, menggunakan alat transportasi sepeda motor, melakukan kunjungan bersama keluarga dengan tujuan berlibur. Persepsi pengunjung mengenai potensi pengembangan adalah bahwa Objek Wisata Trekking Mangrove memiliki daya tarik paling tinggi dan harga yang terjangkau menjadi faktor penentu utama kunjungan. Sedangkan penambahan wisata pengembangan yang paling berpotensi dengan estimasi pengguna tertinggi adalah edukasi penanaman mangrove dengan nilai WTP sebesar Rp. 5.000,00. Nilai ekonomi Objek Wisata Trekking Mangrove, Grand Maerakaca dengan metode TCM sebesar Rp. 45.779.385.645,00/tahun dan Nilai WTP wahana perahu sampan, wahana perahu motor, tiket masuk, tiket parkir motor dan tiket parkir mobil adalah Rp. 10.000,00, Rp. 5.000,00, Rp. 10.000,00, Rp. 2.000,00, dan Rp. 5.000,00. The Grand Maerakaca is one of the tourist destination in Semarang, that have attraction is Tracking Mangrove. The purpose of this study are to know the characteristics of the visitors, the visitor's perception about the potential of tourism development and to calculate the economic value of Trekking Mangrove Object using Travel Cost Method (TCM) and Willingness to Pay (WTP) method. The number of respondents in this study are 100 people. Technique of taking data in this research using Convinience Sampling. The results showed that the visitors characteristics of Tracking Mangrove Tourism Object, Grand Maerakaca majority are students and private employees aged 15-25 years, use motorbike transportation, come with their family on the purpose of vacation. The visitor perception on potential development are the highest attraction of Tracking Mangrove and affordable price to be the main determinant factor of visitation. While addition of the most potential development tours with the highest user estimation is education of mangrove planting with a WTP value of IDR. 5,000. Economic value of Mangrove Trekking Tourism Object, Grand Maerakaca with TCM method is IDR. 45,779,385,645/ year and WTP Value boat ride, motorboat ride, entrance ticket, motorcycle parking ticket and car parking ticket is IDR. 10,000., IDR. 5,000., IDR. 10,000., IDR. 2,000 and IDR. 5,000.
ANALISIS HUBUNGAN JARAK DAN KEDALAMAN DENGAN STRUKTUR KOMUNITAS LAMUN DI PANTAI PANCURAN, KEPULAUAN KARIMUNJAWA
Authors: Ridho Muhammad Gaffar , Supriharyono Supriharyono , Rahman Arif 
Published: September 2020

Pantai Pancuran adalah salah satu lokasi konservasi padang lamun di Taman Nasional Karimunjawa dengan vegetasi padang lamun. Penelitian ini dilaksanakan pada bulan April 2018 dengan tujuan untuk mengetahui hubungan jarak dan kedalaman dengan struktur komunitas lamun yang meliputi kerapatan dan indeks keanekaragamannya. Materi yang digunakan adalah lamun, dengan menggunakan metode deskripsi eksploratif yang bersifat observasi dengan objek yang diteliti di lapangan. Teknik pengambilan sampel menggunakan kuadran transek ukuran 1x1 meter yang tersebar di 3 stasiun berdasarkan jarak dan kedalaman serta terdapat 6 plot pada setiap stasiunnya. Parameter lingkungan yang diamati meliputi jarak dan kedalaman, nitrat dan fosfat sedimen, salinitas, suhu, derajat keasaman (pH), kecerahan, kecepatan arus, pasang surut, dan karakteristik sedimen. Hubungan jarak dan kedalaman dengan struktur komunitas lamun diproses menggunakan analisis regresi dan korelasi. Hasil penelitian ini didapatkan 6 jenis lamun yaitu Thalassia hemprichii, Cymodocea rotundata, Halophila ovalis, Syringodium isoetifolium, Enhalus acoroides, dan Halodule pinifolia. Karakteristik sedimen didominasi oleh pasir halus sebanyak 34,960 %. Korelasi jarak dan kedalaman dengan struktur komunitas lamun diperoleh nilai (r = -0,717) pada kerapatan dan ( r = 0,894) pada indeks keanekaragaman. Pancuran Beach is one of the seagrass conservation areas in Karimunjawa National Park. This study was conducted in April 2018, in order to investigate the relation of distance and depth on the structure of seagrass community which included the density and index of diversity. The method used in this study is seagrass, using explorative description method that is observation to the object study in the field. The sampling technique uses a 1x1 meter transect quadrant spread over 3 stations based on distance and depth with includes 6 plots at each station. Environmental parameters observed include distance and depth, sediment of nitrate and phosphate, salinity, temperature, acidity (pH), brightness, current velocity, tides, and sediment characteristics. The relationship between distance and depth on the structure of seagrass community processed by regression and correlation analysis . The results of the study found 6 types of seagrass, there were Thalassia hemprichii, Cymodocea rotundata, Halophila ovalis, Syringodium isoetifolium, Enhalus acoroides, and Halodule pinifolia. Sediment characteristics were dominated is fine sand of 34.960%. The correlation of distance and depth on the structure of seagrass community resulted a value (r = -0,717) for density and (r = 0,894) for index of diversity.
PENGARUH KERAPATAN LAMUN Thalassia hemprichii TERHADAP KELIMPAHAN BAKTERI HETEROTROF DI PANTAI PRAWEAN, JEPARA
Authors: Yunita Isnaini Dian , Widyorini Niniek , Supriharyono Supriharyono 
Published: September 2020

Ekosistem lamun merupakan salah satu ekosistem yang memiliki kompleksitas dan keanekaragaman hayati yang tinggi. Padang lamun merupakan hamparan vegetasi lamun yang menutupi suatu kawasan pesisir. Selain memiliki fungsi ekonomi, lamun juga memiliki fungsi ekologis yakni berperan penting sebagai pendaur zat hara oleh mikroorganime yaitu bakteri. Penelitian ini bertujuan untuk mengetahui kerapatan lamun, kelimpahan bakteri heterotrof yang berasosiasi dengan lamun serta pengaruh kerapatan lamun dengan kelimpahan bakteri heterotrof di Pantai Prawean, Jepara. Metode yang digunakan yakni deskriptif eksplanatif dengan pengambilan sampel secara purposive dan dianalisis dengan IBM SPSS Statistic 22. Jenis lamun yang ditemukan di Pantai Prawean ada 5 (lima): Enhalus acoroides, Thalassia hemprichii, Cymodocea rotundata, Halodule uninervis dan Halodule pinifolia. Kerapatan tertinggi didapat dari jenis Thalassia hemprichii sebesar 78 Ind/m2 dan terendah adalah Enhalus acoroides 10 Ind/m2 dan kelimpahan bakteri heterotrof tertinggi diperoleh dari tingkat kerapatan rapat di stasiun 3 yakni 29,4x108 Upk/ml dan kelimpahan terendah diperoleh dari tingkat kerapatan jarang di stasiun 2 yakni 3,3x108 Upk/ml. Korelasi antara kerapatan lamun dengan kelimpahan bakteri heterotrof tinggi atau kuat yakni 0,896 dan korelasi ini dinyatakan sangat signifikan terbukti nilai sig. 0,001 dengan tingkat kesalahan 0,1%. Artinya bertambahnya kerapatan lamun dapat meningkatkan pula kelimpahan bakteri heterotrof. Seagrass ecosystem is one ecosytems that has high complexity and biodiversity. Seagrass beds are a stretch of seagrass vegetation that covers a coastal area. Beside its economic function, seagrass also have ecological function that play an important role of nutrient cycle for microorganism its bacteria. This study aims to determine the density of seagrass, the abundance of heterothropic bacteria and influence of seagrass density with abundance of heterotrophic bacteria at Prawean beach, Jepara. The method used in this study is descriptive explanative with purposive sampling and the data analyzed by IBM SPSS Statistic 22. There are 5 (five) species of seagrass that can be found in Prawean beach: Enhalus acoroides, Thalassia hemprichii, Cymodocea rotundata, Halodule uninervis and Halodule pinifolia. The highest density obtained from Thalassia hemprichii species is 78 sprouts of seagrass/m2 and the lowest density obtained from Enhalus acoroides is 10 obtained from seagrass density at station 3 its value 29,4x108Cfu/ml and the lowest abundance of heterotrophic bacteria was obtained from rare seagrass at station 2 its value 3,3x108Cfu/ml. The corelation between seagrass density with abundance heterotrophic bacteria is high or strong that has value 0,846 and this correlation is very significantly proven has sig value 0,001 with error rate 0,1%, it can be conclude that increase of seagrass density can also increase the abundance of heterotrophic bacteria.
Valuasi Ekonomi Sumberdaya Ikan Dan Ekowisata Mangrove Di Muara Angke, Jakarta
Authors: Mahardhika Septya Mega , Saputra Suradi Wijaya , Ain Churun 
Published: September 2020

Muara Angke merupakan satu – satunya kawasan yang masih memiliki ekosistem mangrove di daerah pesisir Jakarta. Luas Muara Angke kurang lebih 964,98 ha dibagi menjadi tiga zona. Dua diantaranya berkontribusi pada sektor Perikanan dan Ekowisata, yaitu Pangkalan Pendaratan Ikan (PPI) dan Taman Wisata Alam Angke Kapuk (TWAAK). Kurangnya pemahaman umum tentang manfaat ekonomi ekosistem mangrove menyebabkan masyarakat mengeksploitasi secara berlebihan sehingga terjadi perubahan penggunaan lahan. Tujuan penelitian ini untuk mengetahui nilai ekonomi yang dihasilkan ekosistem mangrove berdasarkan dua aspek yaitu Perikanan Tangkap dan Ekowisata. Data Perikanan Tangkap menggunakan data sekunder dari Pengelola PPI Muara Angke tahun 2016 – 2017. Data sosial ekonomi diperoleh menggunakan wawancara dengan bantuan kuesioner. Data biaya perjalanan rata – rata diperoleh dengan wawancara pengunjung TWAAK. Analisis Valuasi Ekonomi Perikanan Tangkap menggunakan Market Price Method. Analisis Valuasi Ekonomi Ekowisata Mangrove menggunakan Travel Cost Method. Metode penentuan 100 responden nelayan tangkap menggunakan Random Sampling sedangkan penentuan 100 responden pengunjung TWAAK menggunakan Accidental Sampling. Hasil penelitian didapatkan nilai ekonomi pada aspek perikanan tahun 2016 Rp. 13.148.945.100, tahun 2017 Rp.21.087.388.300 dan tahun 2018 Rp. 370.313.869.500. Hasil penelitian didapatkan nilai ekonomi ekowisata tahun 2018 Rp.40.28.400.000 Muara Angke is the only area that still has mangrove ecosystems in the coastal areas of Jakarta. Muara Angke area is approximately 964.98 ha divided into three zones. Two of them contribute to the Fisheries and Ecotourism sector, namely Fish Landing Base (PPI) and Angke Kapuk Nature Park (TWAAK). Lack of general understanding of the economic benefits of mangrove ecosystems causes people to over-exploit so that land use changes occur. The purpose of this study was to determine the economic value generated by mangrove ecosystems based on two aspects, namely Capture Fisheries and Ecotourism. Capture Fisheries Data uses secondary data from Muara Angke PPI Manager in 2016 - 2017. Socio-economic data were obtained using interview with Muara Angke fishermen with questionnaire assistance. Average travel cost data is obtained by interviewing TWAAK visitors. Capture Fisheries Economic Valuation Analysis using Market Price Method. Economic Valuation Analysis of Ecotourism Mangroves use the Travel Cost Method. The method of determining 100 respondents of capture fishermen uses Random Sampling while the determination of 100 respondents of TWAAK visitors uses Accidental Sampling. The results of the study obtained economic value in aspects of fisheries in 2016 Rp. 13,148,945,100, in 2017 Rp.21,087,388,300 and in 2018 Rp. 370,313,869,500. The results of the study obtained the economic value of ecotourism in 2018 Rp. 40.28.400.000
HUBUNGAN KONSENTRASI NITRAT DAN FOSFAT DENGAN KELIMPAHAN FITOPLANKTON DI WADUK JATIBARANG, SEMARANG The Conection Of Nitrate and Phospat with Abundance of Phytoplankton In Jatibarang Resevoir City Of Semarang
Authors: Marsaoly Micail , Supriharyono Supriharyono , Rudiyanti Siti 
Published: September 2020

ABSTRAK Waduk Jatibarang merupakan salah satu waduk yang berada di Semarang yang berfungsi sebagai wisata, sumber air bersih dan untuk mencegah banjir dengan menampung air dari sungai Kaligarang dan sungai Kreo. Informasi tentang status trofik waduk ini sangat dibutuhkan untuk pengelolaan waduk Jatibarang di masa mendatang. Adapun tujuan penelitian ini adalah untuk mengetahui status trofik perairanberdasarkan kandungan nitrat (NO3), fosfat (PO4), dan klorofil-a di waduk Jatibarang. Hasil dari penelitian ini diharapkan sebagai acuan pengelolaan waduk Jatibarang. Penentuan lokasi sampling pada penelitian ini mengacu pada perbedaan area waduk Jatibarang yang selanjutnya dibagi menjadi tiga stasiun pengamatan. Stasiun I sebagai area masukan (inlet), stasiun II di perairan tengah waduk dan stasiun III di area keluaran (Outlet). Setiap stasiun dilakukan pengambilan dua titik sampel berdasarkan kedalaman yaitu permukaan dan. Hasil penelitian menunjukkan bahwa status trofik waduk Jatibarang berdasarkan kandungan nitrat tergolong eutrofik dengan kisaran nilai 0,866-1,314 mg/l. Fosfat adalah hipertrofik dengan kisaran nilai 2,960-5283 mg/l. Sedangkan dilihat dari kandungan klorofil-a termasuk oligotrofik dengan kisaran nilai 1,471-2,273 mg/l. hubungan antara kelimpahan fitoplankton dengan nitrat dan fosfat masing-masing lemah dan sangat lemah. ABSTRACTJatibarang reservoir is one of the reservoir located in Semarang which has a function as a Tourism, a source of clean water and to prevent flooding control to collect water from Kaligarang and Kreo River. Information on the trophic status of the reservoir is very necessary for the future Management of Jatibarang reservoir. The purpose of this study was to determine the trophic status of waters by nitrate (NO3), phosphate (PO4), and chlorophyll-a in the Jatibarang reservoir. The results of this study will be expected as a reference management of Jatibarang reservoir. Determining the location of sampling in this study refers to the difference in the activity of Jatibarang reservoir area is further divided into three observation stations . Station I input area (inlet) , the second station in the middle of the reservoir waters and III stations in the output area (Outlet). Each station is done taking two sample points based on the depth of that surfaces. The results showed that the trophic status of the reservoir Jatibarang based content from nitrate is oligotrophic with score 0,866-1,314 mg/l. Phospate concentration is hypertrophic with 2,960-5283 mg/l range. Despite Chlorophyl-a is oligotrophic with 1,471-2,273 mg/l. based on Abundance of phytoplankton on the reservoir Jatibarang Classified as Moderat, and the correlation between Abundance of phytoplankton with nitrate and phosphate are weak and correlated weakly.
ANALISIS KESUBURAN PERAIRAN BERDASARKAN KEPADATAN DAN JENIS PERIFITON DI SUNGAI JABUNGAN, BANYUMANIK, SEMARANG Analysis of Water’s Trophic State Based on Periphyton’s Abundance and Types in Jabungan River, Banyumanik, Semarang
Authors: Agustin Arninda Dwi , Solichin Anhar , Rahman Arif 
Published: September 2020

ABSTRAK Sungai Jabungan merupakan salah satu sungai di Kota Semarang yang banyak dimanfaatkan untuk aktivitas sehari-hari seperti pemukiman, pertanian, dan perkebunan sehingga mempengaruhi kesuburan perairan. Kesuburan perairan sungai dapat diketahui dengan menghitung kepadatan perifiton yang ada di perairan. Tujuan dari penelitian ini untuk mengetahui kepadatan dan hubungan antara perifiton dengan kandungan nitrat fosfat, serta mengetahui tingkat kesuburan perairan Sungai Jabungan, Banyumanik, Kota Semarang. Penelitian ini dilaksanakan pada bulan Maret 2019 di Sungai Jabungan, Banyumanik, Kota Semarang. Metode yang digunakan dalam penelitian ini adalah metode purposive sampling di tiga stasiun berbeda yaitu stasiun 1 persawahan, stasiun 2 daerah alami, dan stasiun 3 pemukiman. Analisis data menggunakan metode regresi linier berganda. Hasil yang diperoleh yaitu diperoleh 17 genera perifiton dari kelas Bacillariophyceae dan 2 genera dari kelas Cyanophycea dengan kapadatan stasiun 1 sebesar 118.379 individu/cm2, stasiun 2 sebesar 85.324 individu/cm2, dan stasiun 3 sebesar 110.925 individu/cm2. Kandungan nitrat berkisar antara 3,13–3,67 mg/l dan fosfat berkisar antara 0,93–1,33 mg/l. Hubungan kepadatan perifiton dengan kandungan nitrat dan fosfat lemah dengan nilai korelasi 0,28. Tingkat kesuburan di Sungai Jabungan termasuk dalam kategori mesotrofik (kesuburan sedang) hingga eutrofik (kesuburan tinggi). ABSTRACT Jabungan River is one of several rivers in Semarang City that used for daily activities that affect water quality. One of several ways to know the water’s trophic state is counting the abundance of periphyton. The aim of this research is to know the abundance and correlation between periphytons with nitrate and phosphate, and also to know the water’s level of productivity in Jabungan River, Banyumanik, Semarang City. This research was conducted in March 2019 in Jabungan River, Banyumanik, Semarang City. The method in this research is purposive sampling. Data analysis using multiple linear regression methods. The results show 17 genera of periphytons from Bacillariophyceae and 2 genera from Cyanophycea. The abundance in line 1 were 118.379 organisms/cm2, line 2 were 85.324 organisms/cm2, and line 3 were 110.925 organisms/cm2. The number of nitrates were about 3,13–3,67 mg/l and phosphates were about 0,93–1,33 mg/l. The correlation between periphyton’s abundance and nitrate phosphate is weak with the number of correlation was 0,28. The water’s trophic state in Jabungan River between mesotrophic until eutrophic.
Hubungan antara Nitrat dan Fosfat dengan Kelimpahan Fitoplankton di Waduk Jatibarang Semarang Correlation between Nitrate and Phospate with Abundance of Phytoplankton in Jatibarang Reservoir, Semarang
Authors: Ikhsan Muhammad Khoirul , Rudiyanti Siti , Ain Churun 
Published: September 2020

ABSTRAK Waduk Jatibarang merupakan salah satu waduk yang memiliki peran penting di Kota Semarang sehingga kualitas perairannya perlu diperhatikan. Keberadaan fitoplankton di perairan berkaitan erat dengan kesuburan dan kualitas suatu perairan dikarenakan fitoplankton berperan sebagai produsen primer. Tujuan penelitian ini untuk mengetahui kualitas perairan berdasarkan kelimpahan fitoplankton serta melihat sejauh mana korelasi nitrat dan fosfat akan mempengaruhi kelimpahan fitoplankton diperairan. Penelitian dilakukan pada tanggal 27 Maret 2019 di Waduk Jatibarang semarang. Pengambilan sampel dilakukan menggunakan metode purposive sampling di tujuh stasiun dengan tiga titik kedalaman (permukaan, tengah dan dasar perairan) dan tiga pengulangan (pagi, siang dan malam). Pengolahan data menggunakan program SPSS 25 dengan analisis regresi liner berganda. Konsentrasi nitrat yang didapatkan berkisar antara 0,45-9,64 mg/l, konsentrasi fosfat berkisar antara 1,26-4,81 mg/l, kelimpahan fitoplankton berkisar antara 1.667 – 275.833 ind/l. Hubungan antara konsentrasi nitrat dan fosfat dengan kelimpahan fitoplankton tergolong lemah dengan koefisien korelasi (r = 0,378). Nitrat dan fosfat mempengaruhi kelimpahan fitoplankton sebesar 15% dengan koefisien determinasi (r square = 0,150). Tingkat kesuburan di Waduk Jatibarang termasuk dalam kategori mesotrofik hingga eutrofik berdasarkan konsentrasi nitrat, fosfat dan kelimpahan fitoplankton. ABSTRACT Jatibarang Reservoir is one of the reservoirs that has an important role in the city of Semarang so that the quality of its waters needs to be considered. The presence of phytoplankton in waters is closely related to the fertility and quality of a waters because phytoplankton act as primary producers. The purposes of this research are to determine the quality of water based on the consentration of nitrate and phosphate, to calculate the abundance of phytoplankton and also to know the correlation of nitrates and phosphate toward the abundance of phytoplankton. The research was conducted on 27 March 2019 in Jatibarang Reservoir Semarang. Sampling was carried out at seven stations with three depth points (surface, middle and bottom) and three repetitions (morning, day and night). Data processing using SPSS 25 programme with multiple liner regression analysis. The concentration of nitrate gained ranged from 0.45 - 9.64 mg/l, phosphate concentrations ranged from 1.26 - 4.81 mg/l, the abundance of phytoplankton ranges between 1,667 – 275,833 ind/l. The relationship between nitrate and phosphate concentrations with an abundance of phytoplankton is relatively weak with a correlation coefficient (r = 0.378). Nitrates and phosphates affect the abundance of phytoplankton by 15% with coefficient of determination (r square = 0.150). Water’s trophic state in the Jatibarang reservoir belongs to the mesotrophic up to Eutrophic category.
Novices’ performance using hypertext materials: Shedding light on disorientation
Authors: Jáñez Álvaro , Rosales Javier 
Published: September 2020

Many researchers have proposed a causal link between low domain knowledge and disorientation in hypertext. Our objective was to challenge this hypothesis, examining other variables that might have an influence, such as design, reading instructions, or working memory capacity. We analysed navigation patterns and comprehension scores in a sample of low topic knowledge undergraduate students (N = 45) who were assigned to one of three hypertext conditions: reading for a test, reading to write a summary, and elaborative interrogation. Another sample (N = 45) of low knowledgeable undergraduate students were used as a control group, performing the same tasks using printed texts. Regarding disorientation, and contrasting with previous research, only a minority of students became disoriented in hypertext. Neither reading instructions nor working memory capacity had the expected impact on readers’ behaviour or outcomes, so hypertext design might be a key aspect on explaining disorientation. Implications for hypertext design and education are discussed.

Implications for practice or policy:

The general assumption of low prior knowledge readers becoming disoriented in hypertext is falsified.
Educational hypertext designers should always consider hypertext structure, graphical overviews, and usability elements.
Educators must be aware that novices may show difficulties to adapt their learning behaviour to different reading goals.