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Pengenalan Genus Diatom Menggunakan Principal Component Analysis dan Jaringan Saraf Tiruan Propagasi Balik Sebagai Classifier Rahmi, Silvia; Haryanto, Toto; Pratiwi, Niken TM
Jurnal Ilmu Komputer dan Agri-Informatika Vol 2, No 1 (2013)
Publisher : Departemen Ilmu Komputer IPB

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (235.444 KB)

Abstract

Diatom merupakan suatu mikroalga unisel (kadang berkoloni) yang mempunyai peranan penting dalam dunia riset dan penelitian. Identifikasi diatom merupakan pekerjaan yang rumit. Hal ini dikarenakan diatom memiliki ratusan taksa dengan banyak variasi bentuk dan karakteristik biologi yang menyebabkan proses identifikasinya tidak mudah bahkan bagi seorang pakar. Penelitian ini menerapkan Principal Component Analysis (PCA) untuk reduksi data dan Jaringan Saraf Tiruan (JST) untuk identifikasi diatom. Proporsi PCA yang digunakan ialah 80% dan 90%. JST yang digunakan adalah propagasi balik dengan satu hidden layer. Data yang dipakai pada penelitian ini adalah citra diatom berformat JPG yang diambil menggunakan mikroskop elektrik. Hasil penelitian menunjukkan bahwa generalisasi terbaik sebesar 90% diperoleh pada percobaan menggunakan proporsi PCA 90% dengan persentase data latih 80%.
Komposisi Fitoplanton dan Status Kesuburan Perairan Danau Lido, Bogor-Jawa Barat Melalui Beberapa Pendekatan Pratiwi, Niken TM; Hariyadi, Sigid; Ayu, Inna Puspa; Iswantari, Aliati
JURNAL BIOLOGI INDONESIA Vol 9, No 1 (2013): JURNAL BIOLOGI INDONESIA
Publisher : Perhimpunan Biologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jbi.v9i1.152

Abstract

Danau Lido merupakan perairan yang banyak dimanfaatkan untuk berbagai aktivitas manusia yang akan memberimasukan bahan organik dan anorganik ke perairan. Masukan tersebut dapat meningkatkan kandungan nutrienperairan. Hal ini dapat menyebabkan berubahnya status kesuburan perairan. Penelitian ini bertujuan untukmengetahui komposisi fitoplankton dan menduga status kesuburan perairan Danau Lido melalui beberapa pendekatan.Komposisi fitoplankton di stasiun KJA dan non-KJA relatif sama. Proporsi dan kelimpahan tertinggiberasal dari kelompok Bacillariophyceae, terutama dari genus Melosira sp. Status kesuburan berdasarkan parameteryang diolah dengan menggunakan pendekatan TSI, TRIX, dan Indeks Nygaard menunjukkan bahwa perairan DanauLido memiliki status kesuburan eutrofik. Indeks Nygaard masih relevan dan dapat diterapkan dalam penentuanstatus kesuburan perairan.Kata kunci: Danau Lido, Indeks Nygaard, status trofik, TRIX, TSI
Struktur Komunitas Perifiton Dibagian Hulu Sungai Cisadane, Kawasan Taman Nasional Gunung Halimun Salak, Jawa Barat Pratiwi, Niken TM; Hariyadi, Sigid; Kiswari, Dhona Indah
JURNAL BIOLOGI INDONESIA Vol 13, No 2 (2017): JURNAL BIOLOGI INDONESIA
Publisher : Perhimpunan Biologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (747.907 KB) | DOI: 10.14203/jbi.v13i2.3403

Abstract

ABSTRACTPerifiton is one community of organisms that can adapt and thrive in the river, and relatively settled in one location. Riparian vegetation in the Mountain Halimun-Salak National Park could be expected to affect the community structure of periphyton. The purpose of this study was to identify the community structure of periphyton on different vegetation canopy coverage, to analyze relationship between the communities structure of periphyton and upstream Cisadane water quality conditions, and to determine water quality based on perifiton community. There were three sets three stations based on canopy coverage (80%, 60%, dan 40%). The results showed two groups of stations, the high canopy coverage (80%) and the low canopy coverage. The highest perifiton abundance was found at stations low canopy coverage, that dominated by Bacillarophycae, Pennales order, especially Navicula with higher rate of succesion than the higher canopy caverage. Abundance of periphyton of low canopy coverage was affected by ammonium, turbidity, and water current. Furthermore, in stations high canopy coverage it was influenced by orthophosphate and currents. As a whole, the periphyton community at upstream of Cisadane indicated a good condition of water quality.Keywords: canopy, periphyton, succession rate
Morphological Identification and Diversity Analysis of Fossil Diatoms from Diatomite Sangiran Central Java Indonesia Khustina, Yenny Chusna; Solihin, Dedy Duryadi; Pratiwi, Niken TM
JURNAL BIOLOGI INDONESIA Vol 10, No 2 (2014): Jurnal Biologi Indonesia
Publisher : Perhimpunan Biologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2258.95 KB) | DOI: 10.14203/jbi.v10i2.2105

Abstract

Diatomite Sangiran is diatom fossil rich sediment. The aim of this research was to study the diversity of fossildiatoms from Sangiran, Indonesia based on morphological characteristics. Samples were taken from lower, middle,and upper sediment layers based on their different physical features with three replications each. Diatomiteextraction was performed following modification of Setty (1966) and frustule counting was accomplished by censusmethod. There were total 50 species found in diatomite layers. The diversity analysis showed that highest speciesrichness (21-22), diversity (1.35-1.47), and evenness index (0.44-0.48) were belong to the lower layer. The highestfrustule abundance (9.66x107-1.43x108 frustules/gram) and dominance index (0.67-0.72) were belong to themiddle layer. On the other hand, highest centrales:pennales ratios (0.73-1.11) were belong to the upper layer. Thesediment layers signified an obvious indication of gradual changes from marine to freshwater environment.Dendrogram analysis using MINITAB.v.15.1.2 software denoted similarity between lower sediment layer and theyounger layers was 72.12%; while similarity between middle and upper layers 92.63%.Keywords: diatom, diatomite, diversity, morphology, Sangiran
Keberhasilan Hidup Tumbuhan Air Genjer (Limnocharis flava) dan Kangkung (Ipomoea aquatica) dalam Media Tumbuh dengan Sumber Nutrien Limbah Tahu Pratiwi, Niken TM; Ayu, Inna Puspa; Utomo, Ingga DK; Maulidiya, Ida
JURNAL BIOLOGI INDONESIA Vol 14, No 2 (2018): JURNAL BIOLOGI INDONESIA
Publisher : Perhimpunan Biologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1397.885 KB) | DOI: 10.14203/jbi.v14i2.3745

Abstract

ABSTRACTYellow bur-head (Limnocharis flava) and water spinach (Ipomoea aquatica) are usualy grown  in commercial fertilizer as nutrient source.  Tofu waste water is one of alternative to substitute commercial fertilizer. This study aims to analyze the ability of those aquatic plants in utilizing nutrients in liquid tofu waste for growth. The experiments were set applying nutrients source treatments with simple random in times experimental design (waste water + aquatic worm (without tofu rest) + bacteria/GCB and KCB; waste water + baceria/GB and KB; and water + aquatic worm (with tofu rest)/ACG and ACK, with ANOVA to analyse plants growth respons towards water quality of each treatment. The results showed a significant increase in the growth of both plants. Relative growth rate of GCB and KCB were 0,0124 dan 0,032 gr/day, with doubling time of 56 and 21,659 days; for GB and KB were 0,0055 and 0,0055 gr/day, then 126 days; for ACG and ACK were 0,0200 and 0,029 gr/day, with 35 and 23,739 days of doubling time. A good performance of growth were shown by ACG treatmet for yellow bur-head and ACK for water spinach.  The best result was shown by ACK, the water spinach that grown in water with tofu rest and worm.Keywords: growth, tofu waste water, yellow bur-head (Limnocharis flava), water spinach (Ipomoea aquatica) 
EVALUASI METODE PENENTUAN PARAMETER BIOCHEMICAL OXYGEN DEMAND (BOD) Astuti, Lismining Pujiyani; Pratiwi, Niken TM
LIMNOTEK - Perairan Darat Tropis di Indonesia Vol 23, No 1 (2016)
Publisher : Research Center for Limnology

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Pengukuran BOD sangat penting untuk mengevaluasi tingkat pencemaran perairan oleh bahan organik. Terdapat dua parameter utama dalam kajian mengenai BOD, yaitu BOD ultimate (Lo) dan laju BOD (k). Penelitian ini bertujuan untuk mengevaluasi metode estimasi parameter BOD yang mempunyai tingkat akurasi dan validitas paling baik. Sampel yang digunakan dalam pengukuran BOD diambil dari lokasi karamba jaring apung Waduk Ir. H. Djuanda, Purwakarta. Metode yang digunakan untuk penentuan nilai BOD ultimatee dan nilai k adalah Least Square Method, Thomas Graphical Method dan Daily Different Method. Pengujian tingkat akurasi, validitas dan ketepatan dari metode-metode tersebut didasarkan dengan nilai hasil pengamatan BOD (D), Bias total, koefisien diterminasi dan model kriteria seleksi. Berdasarkan keempat metode uji, metode Least Square Method mempunyai akurasi, validitas dan ketepatan yang  lebih baik dibandingkan metode Thomas Graphical Method dan Daily Different Method.
STRUKTUR KOMUNITAS PERIFITON DIBAGIAN HULU SUNGAI CISADANE, KAWASAN TAMAN NASIONAL GUNUNG HALIMUN SALAK, JAWA BARAT Pratiwi, Niken TM; Hariyadi, Sigid; Kiswari, Dhona Indah
JURNAL BIOLOGI INDONESIA Vol 13, No 2 (2017): JURNAL BIOLOGI INDONESIA
Publisher : Perhimpunan Biologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jbi.v13i2.3403

Abstract

ABSTRACTPerifiton is one community of organisms that can adapt and thrive in the river, and relatively settled in one location. Riparian vegetation in the Mountain Halimun-Salak National Park could be expected to affect the community structure of periphyton. The purpose of this study was to identify the community structure of periphyton on different vegetation canopy coverage, to analyze relationship between the communities structure of periphyton and upstream Cisadane water quality conditions, and to determine water quality based on perifiton community. There were three sets three stations based on canopy coverage (80%, 60%, dan 40%). The results showed two groups of stations, the high canopy coverage (80%) and the low canopy coverage. The highest perifiton abundance was found at stations low canopy coverage, that dominated by Bacillarophycae, Pennales order, especially Navicula with higher rate of succesion than the higher canopy caverage. Abundance of periphyton of low canopy coverage was affected by ammonium, turbidity, and water current. Furthermore, in stations high canopy coverage it was influenced by orthophosphate and currents. As a whole, the periphyton community at upstream of Cisadane indicated a good condition of water quality.Keywords: canopy, periphyton, succession rate
KOMPOSISI FITOPLANTON DAN STATUS KESUBURAN PERAIRAN DANAU LIDO, BOGOR-JAWA BARAT MELALUI BEBERAPA PENDEKATAN Pratiwi, Niken TM; Hariyadi, Sigid; Ayu, Inna Puspa; Iswantari, Aliati
JURNAL BIOLOGI INDONESIA Vol 9, No 1 (2013): JURNAL BIOLOGI INDONESIA
Publisher : Perhimpunan Biologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jbi.v9i1.152

Abstract

Danau Lido merupakan perairan yang banyak dimanfaatkan untuk berbagai aktivitas manusia yang akan memberimasukan bahan organik dan anorganik ke perairan. Masukan tersebut dapat meningkatkan kandungan nutrienperairan. Hal ini dapat menyebabkan berubahnya status kesuburan perairan. Penelitian ini bertujuan untukmengetahui komposisi fitoplankton dan menduga status kesuburan perairan Danau Lido melalui beberapa pendekatan.Komposisi fitoplankton di stasiun KJA dan non-KJA relatif sama. Proporsi dan kelimpahan tertinggiberasal dari kelompok Bacillariophyceae, terutama dari genus Melosira sp. Status kesuburan berdasarkan parameteryang diolah dengan menggunakan pendekatan TSI, TRIX, dan Indeks Nygaard menunjukkan bahwa perairan DanauLido memiliki status kesuburan eutrofik. Indeks Nygaard masih relevan dan dapat diterapkan dalam penentuanstatus kesuburan perairan.Kata kunci: Danau Lido, Indeks Nygaard, status trofik, TRIX, TSI
KEBERHASILAN HIDUP TUMBUHAN AIR GENJER (LIMNOCHARIS FLAVA) DAN KANGKUNG (IPOMOEA AQUATICA) DALAM MEDIA TUMBUH DENGAN SUMBER NUTRIEN LIMBAH TAHU Pratiwi, Niken TM; Ayu, Inna Puspa; Utomo, Ingga DK; Maulidiya, Ida
JURNAL BIOLOGI INDONESIA Vol 14, No 2 (2018): JURNAL BIOLOGI INDONESIA
Publisher : Perhimpunan Biologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jbi.v14i2.3745

Abstract

ABSTRACTYellow bur-head (Limnocharis flava) and water spinach (Ipomoea aquatica) are usualy grown  in commercial fertilizer as nutrient source.  Tofu waste water is one of alternative to substitute commercial fertilizer. This study aims to analyze the ability of those aquatic plants in utilizing nutrients in liquid tofu waste for growth. The experiments were set applying nutrients source treatments with simple random in times experimental design (waste water + aquatic worm (without tofu rest) + bacteria/GCB and KCB; waste water + baceria/GB and KB; and water + aquatic worm (with tofu rest)/ACG and ACK, with ANOVA to analyse plants growth respons towards water quality of each treatment. The results showed a significant increase in the growth of both plants. Relative growth rate of GCB and KCB were 0,0124 dan 0,032 gr/day, with doubling time of 56 and 21,659 days; for GB and KB were 0,0055 and 0,0055 gr/day, then 126 days; for ACG and ACK were 0,0200 and 0,029 gr/day, with 35 and 23,739 days of doubling time. A good performance of growth were shown by ACG treatmet for yellow bur-head and ACK for water spinach.  The best result was shown by ACK, the water spinach that grown in water with tofu rest and worm.Keywords: growth, tofu waste water, yellow bur-head (Limnocharis flava), water spinach (Ipomoea aquatica) 
MORPHOLOGICAL IDENTIFICATION AND DIVERSITY ANALYSIS OF FOSSIL DIATOMS FROM DIATOMITE SANGIRAN CENTRAL JAVA INDONESIA Khustina, Yenny Chusna; Solihin, Dedy Duryadi; Pratiwi, Niken TM
JURNAL BIOLOGI INDONESIA Vol 10, No 2 (2014): Jurnal Biologi Indonesia
Publisher : Perhimpunan Biologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jbi.v10i2.2105

Abstract

Diatomite Sangiran is diatom fossil rich sediment. The aim of this research was to study the diversity of fossildiatoms from Sangiran, Indonesia based on morphological characteristics. Samples were taken from lower, middle,and upper sediment layers based on their different physical features with three replications each. Diatomiteextraction was performed following modification of Setty (1966) and frustule counting was accomplished by censusmethod. There were total 50 species found in diatomite layers. The diversity analysis showed that highest speciesrichness (21-22), diversity (1.35-1.47), and evenness index (0.44-0.48) were belong to the lower layer. The highestfrustule abundance (9.66x107-1.43x108 frustules/gram) and dominance index (0.67-0.72) were belong to themiddle layer. On the other hand, highest centrales:pennales ratios (0.73-1.11) were belong to the upper layer. Thesediment layers signified an obvious indication of gradual changes from marine to freshwater environment.Dendrogram analysis using MINITAB.v.15.1.2 software denoted similarity between lower sediment layer and theyounger layers was 72.12%; while similarity between middle and upper layers 92.63%.Keywords: diatom, diatomite, diversity, morphology, Sangiran