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DISTRIBUSI SPASIAL FLUKS KARBON DIOKSIDA DI PERAIRAN KARIMUNJAWA, INDONESIA Nurul Latifah; Hadi Endrawati; Sigit Febrianto
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol. 11 No. 2 (2019): Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Department of Marine Science and Technology, Faculty of Fisheries and Marine Science, IPB University

Global warming phenomena occures as result of the increase of the amount of greenhouse gases in the atmosphere which is dominated by anthropogenic CO2 (carbon dioxide). These conditions cause climate change on the earth. Therefore, the absorption of carbon dioxide gas in the atmosphere is needed, one of which is through an ocean processes called blue carbon. The purpose of this study was to determine the potential of blue carbon absorption (fluxes CO2) in Karimunjawa waters. This research was conducted in the waters around Karimunjawa Island in May 2018. The research method used a survey method with a quantitative approach. Samples were taken at 15 observation stations of Karimunjawa Island using purposive sampling method. Analysis of carbonate system data by titrimetric method. The results showed that most of Karimunjawa waters (13 stations) functioned as source of CO2 with a range of CO2 flux values between 1.79 to 21.64 mmolCO2/m2/day where the flow of CO2 moved from the ocean to the atmosphere. While the other 2 stations function as sink of CO2 where the flow of CO2 moved from the atmosphere to the ocean with a range of CO2 fluxes of -3.69 to -4.41 mmolCO2/m2/day. The pattern of CO2 fluxes followed a pattern of ∆pCO2, DIC, total alkalinity, salinity, pH. The CO2 flux pattern follows the pattern of changes in ∆pCO2, DIC, total alkalinity, salinity and pH. The spatial distribution of potential blue carbon uptake (fluxes CO2) in Karimunajwa waters as a release of CO2 from the oceans into the atmosphere with a positive flux CO2 value.

POTENSI SIMPANAN KARBON PADANG LAMUN DI PANTAI POKEMON, KARIMUNJAWA Desti Nurul Ramadona; Churun Ain; Sigit Febrianto; Suryanti; Nurul Latifah
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol. 13 No. 2 (2021): Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Department of Marine Science and Technology, Faculty of Fisheries and Marine Science, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jitkt.v13i2.33770

Increased greenhouse gas (GHG) emissions, especially carbon dioxide (CO2), caused global warming. Therefore, mitigation of CO2 emissions is needed by utilizing seagrass potential as carbon storage in biomass. This study aims to determine the carbon storage of above and below ground seagrass in Pokemon Beach in August 2020. The research method used a survey method and descriptive explorative. Samples were taken from 3 stations with line and quadrant transects using the purposive sampling method. Measurement of water quality parameters was performed in-situ. Analysis of seagrass carbon storage was measured using the loss on ignition (LOI) method. The results showed that there are 4 different types of seagrass: Enhalus acoroides, Thalasssia hemprichii, Cymodocea rotundata, and Halophila ovalis, with T. hemprichii dominating. The total density was 295.62 ind/m2, with a 21.29% coverage rate. The overall biomass was 74.42 g/m2, with the above ground biomass of 35.80 g/m2 and the below ground at 38.62 g/m2. Carbon storage amounted to 0.23 tons C/ha, consisting of above ground 0.10 tons C/ha and below ground of 0.13 tons C/ha. The total carbon stock reached 1.13 tons C in the seagrass area of 4903 ha, with an above ground carbon stock of 0.51 tons C and below ground of 0.62 tons C. In general, the below ground seagrass in Pokemon Beach was the largest, storing more carbon.

SEBARAN SPASIAL FISHING GROUND BERDASARKAN KESUBURAN PERAIRAN PADA MUSIM TIMUR DI PERAIRAN TELUK SEMARANG Fishing Ground Spatial Analysis based on Water Productivity at East Season in Semarang Bay Waters Churun Ain; Bogi Budi Jayanto; Nurul Latifah
Saintek Perikanan : Indonesian Journal of Fisheries Science and Technology Vol 11, No 1 (2015): JURNAL SAINTEK PERIKANAN
Publisher : Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro

ABSTRAK Perairan Teluk Semarang merupakan salah satu perairan yang banyak mendapat tekanan lingkungan seiring berkembangnya industri dan pemukiman di sepanjang pesisir Teluk Semarang. Walaupun demikian, perairan Teluk Semarang masih menyimpan potensi sumberdaya ikan karena dukungan posisi geografis daerah tropis yang dapat menyumbang kesuburan perairan. Kesuburan perairan merupakan parameter kualitas perairan yang dapat dijadikan sebagai indikator fishing ground. Tujuan dari penelitian ini adalah untuk 1) menganalisis parameter-parameter kesuburan perairan pada perairan Teluk Semarang secara spasial; 2) menganalisis dan menentukan daerah fishing ground berdasarkan indikator kesuburan perairan. Waktu penelitian dilakukan selama 2 bulan pada bulan Juni-Juli 2015. Metode yang digunakan dalam penelitian ini adalah metode kuantitatif dan teknik pengambilan sampel menggunakan metode purposive sampling pada 6 stasiun yang merupakan daerah tangkapan ikan. Hasil penelitian menunjukkan bahwa parameter-parameter kesuburan perairan yaitu klorofil-a berkisar antara 1,123-3,090 mg/l, fitoplankton berkisar antara 580-792 ind/l, zooplankton berkisar antara 55-154 ind/l. Sebaran spasial fishing ground menunjukkan bahwa Sebaran spasial fishing ground yang sangat sesuai dan sesuai sepanjang perairan Teluk Semarang dari perbatasan genuk sampai perbatasan tugu sedangkan daerah yang kurang sesuai pada perairan lepas pantai daerah semarang utara sampai genuk dengan kisaran kedalaman 6 sampai 16 meter. Kata kunci : Kesuburan Perairan, Fishing Ground, Penginderaan Jauh, Teluk Semarang ABSTRACT Semarang bay waters is one of waters received a lot of environmentalpressure as the industry and domestic waste of semarang along the coast. Nevertheless , the semarang bay are still have the potential resources of fish because support position geographical the tropics that can be contributed waters productivity. Water productivity are parameters of quality of waters which can be used as indicators fishing ground. The aim of this study was to 1) analyze the parameters of the waters productivity in the Semarang Bay with spatial; 2) analyze and determine the fishing ground area based on indicators of waters productivity.Research during 2 months, until June to July 2015. Research methodology is quantitive and sampling techniques using a purposive sampling method at 6 stations in the Semarang bay waters that catch area. The results showed that the waters productifity parameters that chlorophyll-a range between 1.123-3.090 mg/l, phytoplankton ranged between 580-792 ind/l, zooplankton ranged between 55-154 ind/l. The spatial distribution of fishing ground shows that the area of fishing ground which very suitable and suitable are in the nearshore border area Semarang Genuk until Semarang Tugu and the not suitable areas along the Semarang bay waters from the border area off shore North Semarang until Genuk with depth 6 – 16 m. Keywords : Waters productivity, Fishing ground, Remote sensing, Semarang bay waters

MAPPING OF SEAGRASS COVER ON CHLOROPHYLL-A, NITRATES AND PHOSPHATE IN THE TELUK AWUR, JEPARA Sigit Febrianto; Nurul Latifah; Hadi Endarwati; Muhammad Zainuri; Suryanti Suryanti
Saintek Perikanan : Indonesian Journal of Fisheries Science and Technology Vol 15, No 2 (2019): SAINTEK PERIKANAN
Publisher : Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro

Teluk Awur Beach Jepara is one of the waters in Central Java that has a seagrass ecosystem. Seagrass role is the ability to support the life of another biota closely related to the fertility of the waters indicated by the content of chlorophyll-a, nitrate, and phosphate. The purpose of this study is to know the relationship between chlorophyll-a, nitrate, and phosphate to seagrass land cover as well as the variables which have major contributions. The method of study used is descriptive with four station sampling and seagrass with a line transect of 50 m, and a 1x1 m² transect Quadrant divided into 16 sub plots measuring 25 x 25 cm² a spatial approach and multiple regression statistics. The results showed that there was a positive correlation between seagrass land cover to the concentration of chlorophyll-a and nitrate but less correlated phosphate. The highest chlorophyll-a concentrations of 0.381 mg/m3, seagrass land cover 40-60%, seagrass density 314 individual/m2, nitrate 1.141 mg/l and phosphate 0.54 mg/l. The lowest chlorophyll-a concentration ranges from 0.32-0.35 mg/m3, seagrass cover of 0-10%, seagrass density 3-12 individual/m2, nitrate 0.96 mg/l and phosphate 0, 21mg/L. This research shows that there is a strong link between seagrass land cover Concentrations of chlorophyll-a, nitrates and less influential to phosphates.

AIR-SEA FLUX OF CO2 IN THE WATERS OF KARIMUNJAWA ISLAND, INDONESIA Nurul Latifah; Sigit Febrianto; Anindya Wirasatriya; Hadi Endrawati; Muhammad Zainuri; Suryanti Suryanti; Andreas Nur Hidayat
Saintek Perikanan : Indonesian Journal of Fisheries Science and Technology Vol 16, No 3 (2020): SAINTEK PERIKANAN
Publisher : Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ijfst.16.3.171-178

The purpose of this study was to determine the distribution of CO2 flux in Karimunjawa in the east monsoon. The variables in this study were temperature; pH; salinity; DO; CO2 atm was measured using a CO2 meter; chlorophyll-a, phosphate, silicate were measured spectrophotometric method. Total Alkalinity / TA was measured using the titration method with the principle of changing pH; DIC (Dissolved Inorganic Carbon) was measured using CO2sys software. The partial pressure of seawater carbon dioxide calculated using formula: pCO2sea = 6.31T2 + 61,9 Chla2 – 365.85T – 94.41 Chl-a +5715.94, the partial pressure of atmospheric carbon dioxide calculated using formula: pCO2atm = xCO2atm (pb - pH2O). The calculation of the estimated CO2 flux using the formula: Flux CO2 = Kh x kwa x (∆pCO2) , if the CO2 flux has a positive value water acts as a CO2 source, and if it is negative, the waters act as a CO2 sink.. CO2 flux in Karimunjawa waters during east monsoon (represented by August 2018) showed that in Karimunjawa waters with normal pH 7.2-7.4 were dominated by bicarbonate ion HCO3-with an average value of DIC 1847.24 µmol/kg dan TA 1912.51 µmol/kg. The partial pressure of seawater CO2 is higher than the partial pressure of atmospheric CO2 this indicates that the role of Karimunjawa waters as a source of CO2 where there is release of carbon dioxide into the atmosphere with CO2 flux values ranging from 8.549 – 13.272 mmol m-2 day-1. The variables that affect the flux of CO2 were the pCO2sea and ΔpCO2 with a very strong and positive correlation. These two variables were influenced by sea water temperature, salinity, chlorophyll-a, phosphate and silicate.

POTENSI PADANG LAMUN SEBAGAI PENYERAP KARBON DI PERAIRAN PULAU KARIMUNJAWA, TAMAN NASIONAL KARIMUNJAWA (Ability of Seagrass Beds as Carbon Sink in The Waters of Karimunjawa Island, Karimunjawa National Park ) Ajeng Ganefiani; Suryanti Suryanti; Nurul Latifah
Saintek Perikanan : Indonesian Journal of Fisheries Science and Technology Vol 14, No 2 (2019): SAINTEK PERIKANAN
Publisher : Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro

Perubahan iklim disebabkan karena meningkatnya kandungan Gas Rumah Kaca seperti karbon dioksida (CO2), klorofluorokarbon (CFC), ozon (O3), dinitro oksida (N2O), metana (CH4), heksafluorida (SF6), hidrofluorokarbon (HFCS), perfluorokarbon (PFCS)). Diantara kedelapan gas tersebut, konsentrasi gas CO2 di atmosfer memiliki kontribusi terbesar yaitu lebih dari 55% dari total efek GRK yang ditimbulkan. Salah satu upaya pencegahan yang dapat dilakukan untuk menurunkan emisi GRK adalah dengan memanfaatkan lautan dan ekosistem pesisir sebagai penyerap CO2 alami (natural CO2 sink). Lamun merupakan tumbuhan laut yang berkontribusi terhadap penyerapan karbon melalui proses fotosintesis yang kemudian disimpan dalam bentuk biomassa pada bagian daun, rhizoma dan akar. Tujuan penelitian adalah untuk mengetahui jenis lamun, kerapatan dan tutupan lamun serta potensi penyerapan karbon dalam biomassa berupa jaringan atas substrat dan bawah substrat lamun yang dilakukan pada bulan Maret 2018 di Pulau Karimunjawa. Identifikasi jenis lamun dilakukan dengan melihat panduan buku seagrasswatch, kerapatan dan tutupan dilakukan dengan metode transek kuadran. Analisis kandungan karbon dilakukan dengan metode pengabuan. Hasil penelitian ditemukan 8 jenis lamun yaitu Enhalus acoroides, Cymodocea rotundata, Cymodocea serrulata, Thalassia hemprichii, Halophila minor, Halodule uninervis, Halophila ovalis dan Syringodium isoetifolium. Thalassia hemprichii dan Cymodocea rotundata memiliki nilai kerapatan tertinggi dengan kerapatan mencapai 450 ind/m2 dan 1204 ind/m2. Nilai biomassa dibagian bawah susbtrat berkisar 970,39 - 1.412.55 gbk/m2 yang lebih besar dibandingkan nilai biomassa lamun dibagian atas substrat berkisar 371, 88 - 546, 38 gbk/m2 diikuti nilai penyerapan karbon dibagian bawah substrat (akar dan rhizoma) berkisar antara 12,60 – 93,62 gC/m2, sementara kandungan karbon dibagian atas substrat (daun) berkisar antara 4,19 – 34,12 gC/m2. Total stok karbon di perairan Pulau Karimunjawa berkisar antara 1,28 ton karbon – 2,49 ton karbon atau sebesar 0,50 – 0,73 ton karbon/ha Climate change is caused by increasing greenhouse gases content such as carbon dioxide (CO2), chlorofluorocarbon (CFC), ozone (O3), dinitro oxide (N2O), methane (CH4), hexafluoride (SF6), hydrofluorocarbons (HFCS), perfluorocarbons (PFCS) )). Among the eight gases, the concentration of CO2 gas in the atmosphere has the largest contribution, which is more than 55% of the total GHG effects generated. One of the preventive measures that can be taken to reduce GHG emissions is to use the oceans and coastal ecosystems as natural CO2 sinks. Seagrass is a marine plant that contributes to carbon sequestration through photosynthesis which is then stored in the form of biomass in the leaves, rhizomes and roots. This research aims to know the types of seagrass, seagrass cover and potential density of biomass carbon of above the substrate (leaves) and below the substrate seagrass (roots and rhizomes) in March 2018 at Karimunjawa Island. The identification of seagrass types used guidance book of seagrasswatch and the identification of seagrass cover and density was carried out using transect quadrant method. Analysis carbon content used ashing method. The result of the present study found 8 species of seagrasses that Enhalus acoroides, Cymodocea rotundata, Cymodocea serrulata, Thalassia hemprichii, Halophila minor, Halodule uninervis, Halodule ovalis and Syringodium isoetifolium. Thalassia hemprichii and Cymodocea rotundata have the highest density value reached 450 ind/m2 and 1,204 ind/m2. Value biomass below substrate ranged from 970.39 to 1.412.55 gbk/m2 which is greater than the value biomass above the substrate ranged from 371, 88 - 546, 38 gbk/m2 followed by the value of the carbon adsorption in below the substrate (roots and rhizomes) ranged from 12.60 to 93.63 gC/m2, whilst the carbon content above the substrate (leaves) ranged from 4.19 to 34.12 gC/m2. Total carbon stock in the waters of Karimunjawa Island ranged from 1.28 – 2.49 tons of carbon or of 0.50 to 0.73 tons of carbon/ha.

Biodiversitas Echinodermata pada Ekosistem Lamun di Perairan Pulau Karimunjawa, Jepara Reni Ria Yunita; Suryanti Suryanti; Nurul Latifah
Jurnal Kelautan Tropis Vol 23, No 1 (2020): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jkt.v23i1.3384

The seagrass ecosystem is an important ecosystem as the place of feeding ground, nursery ground, and spawning ground. One of the biotas living in the seagrass was Echinoderms. This research aims to determine the density of seagrass and biodiversity of Echinoderms and the relationship between the seagrass density with the abundance of Echinoderms in the waters of Karimunjawa Island. The sampling methods used in this research is purposive sampling with two stations at a different location and each station there were three transect lines. The types of seagrass found in the waters of Karimunjawa Island are eight species i.e.: Thalassia hemprichii, Cymodocea rotundata, Enhalus acoroides, Syringodium isoetifolium, Cymodocea serrulata, Halophila minor, Halophila ovalis and Halodule uninervis. The type of Echinoderms found consists of three different classes i.e., Asteroidea, Echinoidea, and Holothuroidea. Class of Asteroidea, there is 1 type i.e., Archaster typicus. Class of Echinoidea, there are 3 types i.e., Diadema setosum, Laganum central, and Laganum depressum. Class of Holothuroidea, there is 1 type i.e., Holothuria atra. The value of the diversity index (H ') of Echinoderms ranged from 1.24 to 1.49. The range of index values of diversity (H ') of Echinoderms in Karimunjawa Island has medium species diversity. The results of this research show that the value of seagrass correlation with Echinodermata (r) is -0.458, it means that the relationship between them is close enough and the higher density of seagrass then the abundance of echinoderms is lower. Ekosistem lamun merupakan ekosistem penting sebagai tempat feeding ground, nursery ground, dan spawning ground. Salah satu biota yang hidup di ekosistem lamun adalah Echinodermata. Penelitian ini bertujuan untuk mengetahui kerapatan lamun dan biodiversitas Echinodermata serta hubungan antara kerapatan lamun dengan kelimpahan Echinodermata di perairan Pulau Karimunjawa. Teknik sampling yang digunakan dalam penelitian ini adalah purposive sampling dengan dua stasiun pada lokasi yang berbeda dan masing-masing stasiun terdapat 3 line transek. Line transek ditarik secara tegak lurus pantai sepanjang 50 meter dari pertama kali ditemukan lamun. Pengamatan yang dilakukan meliputi jenis dan jumlah lamun, jenis dan jumlah Echinodermata yang ditemukan pada setiap transek serta pengukuran parameter lingkungan perairan . Jenis lamun yang ditemukan di perairan Pulau Karimunjawa terdapat 8 jenis yaitu Thalassia hemprichii, Cymodocea rotundata, Enhalus acoroides, Syringodium isoetifolium, Cymodocea serrulata, Halophila minor, Halophila ovalis dan Halodule uninervis. Jenis Echinodermata yang ditemukan terdiri dari 3 kelas yang berbeda yaitu Asteroidea, Echinoidea, dan Holothuroidea. Kelas Asteroidea terdapat 1 jenis yaitu Archaster typicus, kelas Echinoidea terdiri dari 3 jenis yaitu Diadema setosum, Laganum central, dan Laganum depressum, sedangkan kelas Holothuroidea dijumpai 1 jenis yaitu Holothuria atra. Nilai indeks keanekaragaman (H’) Echinodermata berkisar 1,24 - 1,49. Kisaran nilai indeks keanekaragaman (H’) Echinodermata di Pulau Karimunjawa memiliki keanekaragaman jenis sedang. Hasil penelitian menunjukkan nilai korelasi lamun dengan Echinodermata (r) -0,458 yang berarti hubungan diantara keduanya cukup erat dan semakin rapat lamun maka kelimpahan Echinodermata semakin rendah.

Pemetaan Klasifikasi Dan Analisa Perubahan Ekosistem Mangrove Menggunakan Citra Satelit Multi Temporal Di Karimunjawa, Jepara, Indonesia Nurul Latifah; Sigit Febrianto; Hadi Endrawati; Muhammad Zainuri
Jurnal Kelautan Tropis Vol 21, No 2 (2018): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Mapping of Classification and Analysis of Changes in Mangrove Ecosystem Using Multi-Temporal Satellite Images in Karimunjawa, Jepara, Indonesia Mangrove ecosystem is one of the three ecosystem in the coastal area which has important ecological role in supporting marine life and fisheries resources. These important roles include spawning ground and nursery ground for various marine organisms. However, in the last decades, mangrove ecosystem has been undergoing significant degradation. The aim of this research is to quantify the changes of mangrove coverage and density in Karimunjawa as well as key-factors leading to the changes. Supervised classification method (83% accuracy and Kappa coefficient 0.73%) was applied to satellite images to identify the temporal changes in mangrove coverage. Mangrove density was quantified using NDVI algorithm and NIR-RED wavelength. The result shows that during three periods of observed data, changes in mangrove coverage were significant: 126.81 ha increase (1992 – 2003); 82.37 ha decrease (1992 – 2017); and 209.18 ha decrease (2003 – 2017). Mangrove density in most part of Karimunjawa belongs to the category of ‘low’ (NDVI value: -1 – 0.33). Key factors contributing to the decrease mangrove coverage are deforestation, natural phenomena, land conversion into fish ponds and hotels. The only increase in the year 1992 – 2003 was caused by high sedimentation level that allows more mangroves to grow. Overall, the methods in this research could be used as an approach to describe to effectively monitor the changes of mangrove coverage in an area as basic data for sustainable environmental management. Ekosistem mangrove merupakan salah satu dari tiga ekosistem pesisir yang memiliki peranan ekologis penting dalam mendukung kehidupan dan keberlangsungan dari sumberdaya perikanan. Hal tersebut dikarenakan fungsi mangrove sebagai tempat memijah dan asuhan bagi banyak biota air. Beberapa dekade terakhir keberadaan dari ekosisitem mangrove mengalami degradasi yang sangat signifikan. Tujuan dari penelitian ini adalah untuk mengetahui perubahan luasan dan kerapatan mangrove dan mengidentifikasi faktor penyebabnya. Metode analisa perubahan luasan mangrove menggunakan citra satelit multi temporal dengan dilakukan pembuatan klasifikasi menggunakan metode supervised classification dengan nilai akurasi total 83% dengan Kappa koefisien 0,73%. Setelah terseleksi antara mangrove dan non mangrove maka dilakukan perhitungan kerapatan tajuk menggunakan algoritma NDVI dengan memanfaatkan panjang gelombang NIR dan RED. Hasil analisa spasial dengan rentang 3 tahun berbeda didapatkan perubahan penurunan dan penambahan luasan mangrove terjadi secara signifikan: tahun 1992 – 2003 telah terjadi penambahan luasan sebesar 126,81 ha; tahun 1992–2017 terjadi perubahan luasan sebesar 82,37 ha; tahun 2003–2017 terjadi perubahan luasan sebesar 209,18 ha. Kerapatan mangrove di Karimunjawa sebagian besar tergolong kategori kerapatan jarang dengan nilai NDVI antara -1 – 0,33. Faktor utama penyebab penurunan luasan mangrove antara lain penebangan liar, faktor alam, perubahan fungsi lahan menjadi pertambakan dan perhotelan. Penambahan luasan mangrove terjadi pada antara tahun1992 sampai 2003 hal tersebut disebabkan sedimentasi yang menumpuk di pantai dan sudah ditumbuhi oleh mangrove. Secara keseluruhan metode ini dapat menggambarkan perubahan secara efektif serta hasilnya dapat dipergunakan untuk pemantauan dan perencanaan ekosistem mangrove di suatu wilayah.

Analisis Kelimpahan Fitoplankton di Perairan Alang-Alang Taman Nasional Karimunjawa Nadhea O. Rahmawati; Agus Hartoko; Nurul Latifah
Jurnal Kelautan Nasional Vol 16, No 2 (2021): AGUSTUS
Publisher : Pusat Riset Kelautan

Tujuan dari penelitian ini adalah untuk mengetahui kelimpahan fitoplankton pada ekosistem lamun dan lepas pantai perairan Alang-alang Karimunjawa serta faktor-faktor yang mempengaruhi. Penelitian ini dilaksanakan di Perairan Alang-alang Karimunjawa Desember 2019. Metode Penelitian ini menggunakan metode survei dengan pendekatan kuantitatif. Pengambilan sampel dilakukan di 10 stasiun menggunakan metode purposive sampling. Analisis data sistem karbonat menggunakan analisis komponen utama (PCA). Hasil dari penelitian ini menunjukkan bahwa kelimpahan fitoplankton tertinggi pada Perairan pantai Alang-alang Karimunjawa bulan Desember 2019 diperoleh pada ekosistem lamun dengan kisaran rata-rata sebesar 380 individu/L, sedangkan pada perairan lepas pantai hanya berkisar 200 individu/liter. Faktor-faktor yang paling mempengaruhi kelimpahan fitoplankton tersebut yaitu klorofil-a dengan nilai R2 sebesar 0,96 dan r sebesar 0,98, variabel lain yang memiliki hubungan kuat dengan kelimpahan fitoplankton berdasarkan analisis PCA (Principal Componen Analysis) yaitu nitrat dan silikat.

PERBEDAAN ASUPAN GIZI TERHADAP KADAR HEMOGLOBIN PADA REMAJA PUTRI YANG BERSEKOLAH DI FULL DAY SCHOOL DENGAN NON FULL DAY SCHOOL (Studi di SMA Negeri 1 Sragi & SMA Islam Wonopringgo Kabupaten Pekalongan) Nurul Latifah; Laksmi Widajanti; M. Zen Rahfiluddin
Jurnal Kesehatan Masyarakat Vol 7, No 4 (2019): OKTOBER
Publisher : Fakultas Kesehatan Masyarakat Universitas Diponegoro

Full day school and non full day school policies with different rest allocations cause changes in eating patterns, namely lunch at school so that the body's nutritional needs are not met, the impact of the synthesis process is disturbed if it occurs continuously, it will cause anemia. The research objective is to determine differences in nutritional intake on hemoglobin levels in adolescent girls who attend full day school (FDS) with non full day school (NFDS). Nutrient intake includes energy, protein, iron and vitamin C. Comparative study method with cross sectional approach with stratified random sampling technique. The number of samples is 35 per school. Data analysis using Independent T-test, Mann Whitney, Pearson Correlation and Spearman Rank test. The results showed that the majority of the FDS Energy Adequacy Level was 77.1% less than the NFDS of 97.1% and the normal category FDS hemoglobin level was 68.6% smaller than the NFDS of 77.1%. Protein Adequacy Level , iron, vitamin C of 68.6%, 85.7%, 74.3% in the FDS category less, greater than NFDS namely 51.4%, 57.1%, 65.7%. Conclusions are There are differences in the level of iron adequacy in young women in FDS & NFDS (P value = 0.001) and there are no differences in levels of hemoglobin, levels of energy, protein, and vitamin C adequacy in young women in FDS & NFDS (p value = 0.408, 0.651, 0.902, 0.321). Suggestions from research are that full day school can provide food sources of protein and iron from animals that are appropriate, whereas for non full day schools can maintain good consumption patterns

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