Riche Hariyati
Department of Biology, Diponegoro University Jalan Prof. H. Soedarto, SH. Tembalang Semarang
Articles
17
Documents
Persebaran Diatom Epipelik secara Vertikal pada Ekosistem Mangrove Muara Sungai Banjir Kanal Timur Semarang

JURNAL ANATOMI FISIOLOGI Vol 17, No 1 (2009): Volume XVII, Nomor 1, Maret 2009
Publisher : JURNAL ANATOMI FISIOLOGI

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Abstract

Diatom is a widespread and cosmopolite micro alga, some can used as bio-indicator of the past environmental change because of its sensivity to its habitat condition and because it is wellfossilized. This study has been done on the estuary of Banjir Kanal Timur Semarang which has ecosystem mangrove; this region is often affected by coast abrasion, flooded by spring-tideinundation water, rain, and freshwater inflow of the river. The study was aimed to examine relative abundance difference, diversity, and vertically variety level of diatom per 2 cm per sediment layer. Sampling method used in the research was “Judgemental Random Sampling”. The result shows that diatom in the mangrove ecosystem of Banjir Kanal Timur Estuary is stable in the upper layer sediment and midle from lower layer and the mangrove ecosystem of Banjir Kanal Timur Estuary is affected by freshwater estuary, based on the domination of the existence of freshwater diatoms (Navicula radiosa, Synedra ulna, Meridion circulare, Sellaphora bacillum, and Eunotia lunula) onthe 8-20 layer.

Struktur Komunitas Fitoplankton sebagai Bio Indikator Kualitas Perairan Danau Rawapening Kabupaten Semarang Jawa Tengah

JURNAL ANATOMI FISIOLOGI Vol 19, No 1 (2011) : Volume XIX, Nomor 1, Maret 2011
Publisher : JURNAL ANATOMI FISIOLOGI

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Abstract

Rawapening is a distric of lake equatorial which has many potential benefit such as fishery, recreation facilities, Eceng gondok plant, etc. The water quality there is damagedend disturbed by fishery increacing and Eceng gondok growth. The changeness of equatorial quality can be identifies by richness of fitoplankton’s compotition. That is because fitoplankton makes an important contribution in equatorial ecosistem as primer produsen in food equilibrium and that can respons the environment’s change. The sampling’s dot is chosen by sampling random methode in five different sampling dot including the area of Kali galeh, Bukit cinta, Asinan, Seraten, and Tuntang. The primer parameter in this research is the community structure of fitoplankton and the secondary parameter is physic and chemis factor in equatorial ecosistem like pH, turbidity, temperature, brightness, speed of waves and oxygen demand. The result of this observatory found 16 genus of fitoplankton that consist of 4 division : 5 genus of Chrysophyta, 6 genus of Chlorophyta, 3 genus of Cyanophyta and 2 genus of Dynophyta. Most of fitoplankton population is dominated by spesies of Melosira. The saprobik index shows value 1,63 that indicated the water of equatorial ecosistem is poluted low in Oligo fase / β- mesosaprobik.

Optimalisasi Faktor Lingkungan terhadap Jumlah Spora Terlepas pada Gelidium sp.

JURNAL ANATOMI FISIOLOGI Vol 16, No 2 (2008): Vol. XVI, No. 2, Oktober 2008
Publisher : JURNAL ANATOMI FISIOLOGI

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Abstract

This research was conducted to determine the influence of combined environmental factors on theoptimum number of spores released from Gelidium sp. The research was done at the laboratory ofMarine Science Development in Jepara.The design of the experiment used was split plot design basedon Completely Randomized Design with three factors : light intensity, photoperiod and salinity. Eachtreatment has three replications. As main plot was combination between light intensity and photoperiodwith three levels respectively           ( 100 lux ; 500 lux ; 1000 lux ) and photoperiod 14 hours light 10 hoursdark ( 14 : 10 hours ; 16 : 8 hours ; 18 : 6 hours ) sub plot was salinity ( 25 %o ; 30 %o ; 35 %o ). Thecollected data were statistically analyzed with ANOVA, followed by DMRT.The result revealed thatthe treatment gave the significant effect on the spores released. The optimum average number of sporereleased of Gelidium sp. Were the combination of light intensity 500 lux, photoperiod 16 : 8 hours andsalinity 30 %o. There was a positive interaction between these three factors in affecting the sporereleased.

Komunitas Plankton pada saat Pasang dan Surut di Perairan Muara Sungai Demaan Kabupaten Jepara

JURNAL ANATOMI FISIOLOGI Vol 19, No 2 (2011): Volume XIX, Nomor 2, Oktober 2011
Publisher : JURNAL ANATOMI FISIOLOGI

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Abstract

This research was conducted  to study the plankton community at high tide and low tide of Demaan estuary, Jepara regency and to know the dynamics of abundance. The time of the research was done from April-June 2011. Sampling sites was determined by dividing the 3 stations in the estuary with Stratified Sampling Method, and two stations located on the river (station 4) and sea (station 5). The data determined are abundance index (N), diversity index (H ´), evenness index (e), dominance index (C) and similarity index (IS). Physico-chemical factors were measured included water temperature, pH, salinity, DO, depth, turbidity, light penetration, and flow velocity. The plankton was found at high tide and low tide in April was Coelastrum sp. (Chlorophyta). Chaetoceros sp. (Chrysophyta) was found at high tide in May, whereas at low tide was Chlorella sp. (Chlorophyta). In June at high tide, there were found Chaetoceros sp. (Chrysophyta) and Arcella sp. (Protozoa), whereas at low tide were Bacteriastrum sp. (Chrysophyta), and Arcella sp. (Protozoa). The number of species at high tide was higher than at low tide, and the highest number of species present in June. Abundance index of  plankton in the estuary at high tide ranged from 6300-18572 ind/L, whereas at low tide ranged from 3807-17848 ind/L. Diversity index (H ´) at high tide ranged from 1,74 to 2,83, whereas at low tide ranged from 1,39 to 3,16. Evenness index (e) at high tide ranged from 0,6 to 0,85, whereas at low tide ranged from 0,63 to 0,86. Dominance index (C) at high tide ranged from 0,08 to 0,33, whereas at low tide ranged from 0,06 to 0,34. Similarity index at station of estuary average are not similar, except at station 1 at high tide and station 2 at low tide in June.Keyword : estuary, high tide and low tide, plankton

PERTUMBUHAN POPULASI CHLORELLA VULGARIS BEIJERINCK DENGAN PERLAKUAN PENAMBAHAN LOGAM BERAT TEMBAGA (CU) PADA SKALA LABORATORIUM

Jurnal Akademika Biologi Vol. 2 No. 1 Januari 2013
Publisher : Departemen Biologi, Fakultas Sains dan Matematika Undip

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Abstract

Environmental pollution has become a serious problem in marine environment. Inorganic pollutants was harmful to the environment because difficult to decompose naturally, therefore induce  environmental damage. One anorganic pollutants agent is heavy metal copper (Cu). Algae have a high tolerance to heavy metal copper stress in the environment so it can be used as a bioremediation agent, such as  Chlorella vulgaris Beijerinck. This study aimed to determine the effect of copper to the population growth of Chlorella vulgaris Beijerinck. Research was carried out by inoculated Chlorella vulgaris Beijerinck in seawater culture medium containing copper (Cu) with concentration 0.05 ppm, 0.5 ppm, 5 ppm, and 25 ppm, respectively.  Observation of the growth of Chlorella vulgaris Beijerinck were performed every 24 hours for 14 days by Improved Neubauer Haemocytometer. The results showed that copper with concentration 0.05 ppm and 0.5 ppm increased Chlorella vulgaris Beijerinck  growth populations at day three and  it also inhibit Chlorella growth until day eigth. Chlorella  population then increased sigificantly at day eight until day fourteen of observation.  Copper  with concentration  5 ppm and  25 ppm decreased the population of Chlorella vulgaris Beijerinck and then increased its population at day six. Chlorella population then decreased at ten day of observation.   Key words: growth, heavy metals copper (Cu), Chlorella vulgaris Beijerinck, bioremediation

Keanekaragaman Fitoplankton Pada Tambak Udang Vaname (Litopenaeus Vannamei) di Tireman Kabupaten Rembang Jawa Tengah

Jurnal Akademika Biologi Vol. 7 No.3 Juli 2018
Publisher : Departemen Biologi, Fakultas Sains dan Matematika Undip

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Abstract

Budidaya udang Vaname (Litopenaeus vannamei) menjadi andalan komoditas peningkatan perekonomian petani tambak di Indonesia. Fitoplankton merupakan salah satu mikrorganisme yang dapat dijadikan pengukur produktivitas primer perairan karena fitoplankton mampu melakukan fotosintesi dan hasil dari fotosintesis berupa oksigen yang dapat dimanfaatkan oleh biota di dalam perairan. Penelitian ini bertujuan untuk mengetahui keanekaragaman fitoplankton dan kualitas perairan tambak. Metode pengambilan sampel fitoplankton dengan puporsive random sampling. Analisis data menggunakan indeks keanekaragaman Shanon Wiener (H’), indeks keseragaman (e), indeks dominansi (D), dan kelimpahan. Hasil penelitian menunjukan bahwa jenis fitoplankton berjumlah 14 jenis yang tergolong ke dalam kelas Bacillirophyceae 6 Chlorophyceae 2 jenis, Cyanophyceae 4 jenis, dan Dinophyceae 2 jenis. Jenis fitoplankton yang paling banyak ditemui selama penelitian yaitu Skletonema costatum pada stasiun 3 yang tergolong dari kelas Bacillirophyceae. Indeks Keanekaragaman (H’) berkisar antara 1,42 – 2,16. Nilai tersebut menggambarkan keanekaragaman jenis fitoplankton dalam tingkat sedang. Nilai indeks pemerataan (e) berkisar antara 0,59 – 0,98 yang menggambarkan jenis fitoplankton dinyatakan merata. Nilai indeks dominansi (D) berkisar antara 0,12 – 0,36 yang menggambarkan tidak ada jenis yang mendominasi. Kualitas perairan tambak udang Vaname berdasarkan DO, suhu, salinitas, pH, kecerahan, dan kandungan nitrat-fosfat masih baik digunakan untuk budidaya udang.

Phycoremediation of waste water from a plastic manufacturing industry with Chlorella pyrenoidosa H.Chick in laboratory study

Waste Technology Vol 2, No 1 (2014)
Publisher : University of Diponegoro

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Abstract

Abstrack - The plastic industries has increased by 7-8% per year, it will cause a negative impact for the environment. The wastewater of plastic industrial contain many pollutants such as hazardous substances bensen, formaldehyde and heavy metals (Cd, Cu, Cr and Pb). Heavy metals Cu is the most dangerous heavy metals since Cu can inhibit enzyme systems, remediation are needed to reduce the pollutants in the environment. One effective way is by using Chlorella pyrenoidosa H.Chick as phycoremediation agent. This study aims to assess the percentage of population growth and decline of heavy metals Cu after inoculation with C. pyrenoidosa H.Chick. The method used is to cultivate C. pyrenoidosa H.Chick in plastic wastewater for 8 days and observed a decrease of percentage heavy metal Cu and population growh of C.pyrenoidosa H.Chick. Environmental factors such as temperature, salinity, pH, light intensity is maintained in order to remain stable. The data obtained with T test. After 8 days of the study turned out that C. pyrenoidosa H.Chick able to reduce Cu of 0.435 mg / l to 0.24 mg / l within 8 days and decrease percentage is 44.83%, thus meeting the criteria of the quality standard of waste according to the PP. 82 of 2001 in the amount of 0.2 ppm and safe for environment. Keywords: Chlorella pyrenoidosa, phycoremediation, water, plastic, copper.

PENGARUH LIMBAH CAIR TAHU TERHADAP PERTUMBUHAN POPULASI CHLORELLA PYRENOIDOSA H. CHICK DALAM SKALA LABORATORIUM

Jurnal Akademika Biologi Vol. 6 No. 2 April 2017
Publisher : Departemen Biologi, Fakultas Sains dan Matematika Undip

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Abstract

Chlorella pyrenoidosa H.Chick is one of abundant microalgae in Indonesia and mostly cultivated due to its characters which are fast and easily transplanted. Tofu liquid waste contains nutrient which is needed by mikroalga because it contains inorganic content such as carbon, nitrogen, phosphorus, potassium. This research is to study the influence of difference concentration of tofu liquid waste towards population growth of C. pyrenoidosa and concentration level of  tofu liquid waste towards population growth of C. pyrenoidosa. The method is by cultivating C. pyrenoidosa H.Chick through the water media which has been given any tofu liquid waste concentration which functions as nutrient source for microalgae. The tofu liquid waste concentration  is consisting of0% as control, 15%, 30%, 45% and 60% and it’s conducted by three times repetition.  The obtained data was tested by ANOVA. As the F score was different then continued by Duncan test. The result shows that the optimal peak of microalgae’s population growth could befound in media with 15% concentration of tofu liquid waste, 337.500 cell/ml, then another control(0%), 170.000 cell/ml and 30%, 119.167 cell/ml, 45%, 81.667 cell/ml. The solidity of lowest population in  60%  concentration showed 65.833 cell/ml. This  findings  has showed that thedifferent handling of concentration towards tofu liquid waste has influenced on C. pyrenoidosapopulation growth. The optimal growth reaches at 15% concentration of  tofu liquid waste. Keywords: Chlorella pyrenoidosa, population, waste, liquid, tofu

Pengaruh Pemberian Kompos Sampah Rumah Tangga Terhadap Pertumbuhan Chlorella vulgaris Pada Skala Laboratorium

Bioma Vol. 14, No. 2, Tahun 2012
Publisher : Bioma

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Abstract

Accumulation household organic waste caused environtment disturbances such as bad odor, methan occur, stoppage canal water, and disease spread. Organic waste processing are needed in order to reduce this problem. Processing household waste into composs was one way to reduce organic waste accumulation. The objective of this study is to determine optimal dose household composs for Chlorella vulgaris growth. Research are done in two phase within 9 days of each. Composs liquid doses for main research are 6%,7%,8%, 10%, and Walne fertilizer used as control. Result show effect of household composs on Chlorella vulgaris growth. Optimal doses for Chlorella vulgaris growth are composs liquid doses  8% and 10%.   Key word: Household composs, Growth, Chlorella vulgaris.

PENGARUH PERBEDAANKADAR LOGAM BERATKROMIUM (Cr) TERHADAPPERTUMBUHAN POPULASISpirulina platensis (Gomont) Geitler DALAM SKALA LABORATORIUM

Jurnal Akademika Biologi Vol. 3 No. 3 Juli 2014
Publisher : Departemen Biologi, Fakultas Sains dan Matematika Undip

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Abstract

Industrial products such as metal and paint had generate hazardous wastes, one of then is a heavy metal Chromium (Cr). Industrial wastes containing Cr may cause many negative effects when directly discharged to environment without any prior processing. Therefore, recovery actions (remediation) is one of many ways to solve the problem. Phycoremediation is one of remediation that is simple, efficient and safe in process by using the microalgae to remediate the environment, and one of the microalgae is Spirulina platensis (Gomont) Geitler. This study was conducted to determine the effect and the removal efficiency of heavy metals Cr on Spirulina platensis culture media. The results showed there was significant influence between the administration of heavy metal Cr 1 mg/l, 3 mg/l and 5 mg/l Cr on the population growth of S. platensis. Heavy metal Cr concentration of 1 mg/l increased the growth of S. platensis, while the opposite happened when administrated with 3 mg/l and 5 mg/l. Higher concentration of heavy metal Cr on culture media decreased population of S. platensis. The culture added with heavy metal Cr concentration of 1 mg/l, 3 mg/l and 5 mg/l on the 7 days treatment were able to decrease heavy metal Cr level respectively 35%, 14% and 8%. Thus, the longer treatment days the bigger decrease percentage concentration of heavy metal Cr. Keywords: Cr, phycoremediation, microlagae, Spirulina platensis