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All Journal Natural Science: Journal of Science and Technology Jurnal Biologi Universitas Andalas Biocelebes Bioeksperimen: Jurnal Penelitian Biologi BioCONCETTA Bioscientist : Jurnal Ilmiah Biologi Andalasian International Journal of Agricultural and Natural Sciences Makara Journal of Science
Izmiarti Izmiarti, Izmiarti
Laboratorium Ekologi Hewan, Jurusan Biologi, FMIPA, Universitas Andalas
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Education Immunology & microbiology Social Sciences

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Komposisi dan Struktur Komunitas Fitoplankton di Danau Maninjau Sumatera Barat Gusna Merina; Afrizal S; - Izmiarti
Jurnal Biologi Universitas Andalas Vol 3, No 4 (2014)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jbioua.3.4.%p.2014

Abstract

A study on composition and structure of phytoplankton community at Maninjau lake was conducted from April to July 2013. The planktons were sampled purposively at 11 stastions using vertically towed of plankton net. This study found a total 94 species of phytoplankton that mostly belong to Chlorophyceae. Density of phytoplankton varied significantly between sampling stations ranged from 1,083 to 5,119 ind/l. The highest density was found at Station where agriculture plant dominated the vegetations around the edge of the lake, while the lowest density found at station located near the centre of the lake. Those phytoplanktons with relative density higher than 5% were Synedra ulna, Cosmarium compressus, Cosmarium decoratum, Sturastrum playfairi, Chroococcus disperses, Chroococcus limneticus and Glenodinium quadridens. Diversity indiches of phytoplankton (H`) was ranged from 1,96-2,80 with highest diversity at Galapuang (near garbages disposal area and fish farms) and the lowest was at Pakan Rabaa (water inlet). Equitability indiches (E) ranged from 0.65 to 0.81. The Index of Similarity phytoplankton was range from 28.12-70.00%. The result of this study might suggest that composition of the phytoplankton in the lake was relatively high although the structure reflected some influencees of human activities.Key word :phytoplankton, community, diversity, and Maninjau Lake.
Bioassessment of Batang Kandis River Water Quality Using Macrozoobenthos in Koto Tangah district, Padang City Mhd Nur Allatif; Izmiarti Izmiarti; Nofrita Nofrita
Jurnal Biologi Universitas Andalas Vol 9, No 1 (2021)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jbioua.9.1.18-24.2021

Abstract

This study was conducted from July to December 2019 which was aimed to determine the composition of macrozoobenthic community and to assess the water quality of the Batang Kandis river based on the BMWP ASPT index. A survey method was used in this study. The study site was determined by purposive sampling based on environmental condition which was divided into four stations. Macrozoobenthos samples were taken using a surber net (30 x 30 cm2). The physical and chemical factors of water condition were measured during sampling time. The results showed that 23 genera of macrozoobenthic communities were found in the Batang Kandis river which were consisted of two classes i.e., Hirudinea (1 order, 1 family, 1 genus) and Insect (7 orders, 14 families, 22 genera). These macrozoobenthic communities had an average density ranges from 220.00 - 706.67 ind. m-2 with the highest density was found at Station II and the lowest one at Station IV. Variation in the predominant genus was found at every station: Orthocladius and Elophila (station I); Polypedilum, Orthocladius, Elophila, and Hydropsyche (station II); Polypedylum, Macropelopia, and Caenis (station III); and Polypedylum, Orthocladius, and Caenis (station IV). The water quality of Batang Kandis river was classified into not polluted (station I, II and III) to slightly polluted (station IV) based on the BMWP-ASPT indexes. 
Komunitas Algae Epilitik Sebagai Indikator Biologis Di Sungai Batang Ombilin, Sumatera Barat Indah Yusliga Sari Purba; Izmiarti Izmiarti; Solfiyeni Solfiyeni
Jurnal Biologi Universitas Andalas Vol 4, No 2 (2015)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jbioua.4.2.%p.2015

Abstract

A study about community of epilithic algae was conducted on April until August 2014. The objective of this study was to clarify composition and structure of epilithic algae in Ombilin River and water quality of Ombilin River based on community of epilithic algae. Samples were collected by survey and brushing method and the research station was choosed 6 stations purposively. The results showed that totally 72 genera had been found with total density of epilithic algae was 388.92ind/cm2to 2139.04 ind/cm2. The highest density of epilithic algae was found in station III (Talawi) and the lowest in station II (Lubuk Pinang). The dominant epilithic algae were Cocconeis, Synedra, Navicula, Denticula and Gomphonema (Baccilariophyta), Stigeoclonium (Chlorophyta), Phormidium and Calothrix (Cyanophyta), Ceratium (Dinophyta) and Audouinella (Rhodophyta). Diversity index was 1.50 to 2.48, where the highest was observed at station II (Lubuk Pinang) and the lowest one at station III (Talawi). Equitability index was 0.42 to 0.68. Similarity index was 50 to 74.70%. Saphrobic coefficient was 0.61–1. The result also showed that Ombilin Riverwere polluted slightly byorganic and inorganic materials in β-mesosaprobic phase.
Kelimpahan Populasi dan Kondisi Habitat Labi-Labi (Dogania subplana: Reptilia: Trionychidae) di Kawasan Kampus Universitas Andalas Padang Bimo Premono; Rizaldi Rizaldi; Izmiarti Izmiarti
Jurnal Biologi Universitas Andalas Vol 4, No 1 (2015)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jbioua.4.1.%p.2015

Abstract

A study on population and habitat of forest softshelled turtle (Dogania subplana: Reptilia: Trionychidae) has been conducted from January to March 2014. This study aimed to understand population abundance and to describe non-natural and natural habitats. Population abundances were found out through searching, counting and release methods. Habitats were described based on physic-chemical, potential food-resource and vegetation factors. The turtles were more abundance in non-natural habitat (33 individual of 640 m²) than natural habitat (5 individual of 5.100 m²). The turtles were abundance in sand and gravel streams of non-natural habitat and sand and rocky streams of natural habitat. The turtles prefered in slow streams (0-10 cm/s) and neutral pH (7.1-7.6).Keywords: population abundance, non-natural habitat, natural habitat, Dogania subplana.
Struktur Komunitas Alga Perifiton Sungai dalam Gua Batu Asahan di Sumpur Kudus Kabupaten Sijunjung Sumatera Barat Izmiarti Izmiarti
Jurnal Biologi Universitas Andalas Vol 7, No 1 (2019)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jbioua.7.1.27-33.2019

Abstract

The cave ecosystem has a unique environment because it receives minimal sunlight and does not even get sunlight at all. Dark conditions in the cave will affect producers such as periphyton algae that live in rivers in caves that need sunlight for photosynthesis. This study aims to determine the periphyton community structure in the river in the Batu Asahan Cave in Sumpur Kudus, Sijunjung District, West Sumatra. This research held in August 2016. The research was carried out by survey method at 3 stations: bright, dim and dark zones. The results showed that periphyton were found as many as 22 species classified as Bacillariophycea 13 species, Cyanophyceae 5 species, Chlorophyceae and Euglenophyceae each of 2 species. Based on the number of individuals Bascillariophyceae 67.0%, Cyanophyceae 24.49%, Chlorophyceae 4.79% and Euglenophyceae 3.72%. Population density in each zone was low, ranges from 1.26 - 2.82 ind / cm2. The dominant species vary in each zone which is the highest shown by Synedra ulna (Bacillariophyceae) and Oscillatoria tenuis (Cyanophyceae). Diversity index ranging from 2.11-2.47 is not significantly different between zones, indicating the quality of clean water. The equitability index was high (E = 0.88-0.96) show the populations in the community evenly. Similarity index between zones was low (C = 25 - 56%). Fisicochemical factors of water indicate the quality of clean water supports the life of periphyton algae in the river.
Komposisi dan Struktur Komunitas Fitoplankton di Danau Diatas Kabupaten Solok Sumatera Barat Muhammad Ikhsan; Izmiarti Izmiarti; Indra Junaidi Zakaria
Jurnal Biologi Universitas Andalas Vol 4, No 2 (2015)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jbioua.4.2.%p.2015

Abstract

A study on community of phytoplankton in Diatas lake was conducted from April to September 2014. This study aimed to describe composition and structure of phytoplankton of the lake. We sampled phytoplankton at 6 stations purposively using plankton net that hauled vertically. We  found 70 species of phytoplankton those belong to five classes, i.e. Bacillariophyceae (33 species), Chlorophyceae (27 species), Cyanophyceae (5 species), Dinophyceae (3 species) and Euglenophyceae (1 species). Total density of phytoplankton ranged from 881.06 to 3,196.02 ind/l. The highest density was at Station VI (Teluk Kinari) and the lowest one was at Station III (Muaro). Phytoplanktons with higher relative density (RD > 5 %) were Melosira italica, Synedra ulna, Melosira granulata (Bacillariophyceae), Staurastrum cereates, Chlorella vulgaris and Spirogyra fluviatis (Chlorophyceae). Shannon-Wiener Diversity index of phytoplankton (H`) ranged from 1.30 to 1.71 with the highest diversity index was at Station IV (Batang Hari) and the lowest was at Station V (central lake). Equitability index (E) was ranged from 0.39 to 0.57. Similarity index among stations were low which ranged from 34.48  to 62.50%.
Kepadatan Populasi dan Distribusi Ukuran Cangkang Kerang Lokan (Rectidens sp.) di Perairan Tanjung Mutiara Danau Singkarak, Sumatera Barat Dea Rahayu Silviana; Jabang Nurdin; - Izmiarti
Jurnal Biologi Universitas Andalas Vol 3, No 2 (2014)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jbioua.3.2.%p.2014

Abstract

The study about population density and size distribution of clam (Rectidens sp.) at Tanjung Mutiara Singkarak Lake, West Sumatra has been conducted from June to July 2013. The clams were collected using stratified purposive sampling method. Sampling site was decided into three location based on human activities and three depth strata in each location (<5m, 5-10m and >10-15m). The clams were collected using “dauah” (traditional tool to cath shellfish). There were 43 individu of clams that found at Tanjung Mutiara Singkarak Lake. The highest average population density were found at location III (1.444 ind./m2). The highest average population density were found at strata 3 (1.082 ind./m2). Size distribution of clam showed that at each location and strata have different size. The size of the clam between 24.37-88.54 mm. Medium size clam were the most frequent found in comparison with the small size and large clam. Small clam distributed at strata 2 (5-10 m) locations I and III and strata 3 (> 10-15 m) location III. While large clam only distributed at strata 3 (> 10-15 m) locations II and III. Size distribution of clam varied with the type of substrate and substrate particle.Keywords: clam, Rectidens sp., population density, size distribution
Kepadatan Populasi dan Distribusi Ukuran Kerang Contradens sp. di Perairan Tanjung Mutiara Danau Singkarak, Sumatera Barat Misren Ahyuni; - Izmiarti; - Afrizal
Jurnal Biologi Universitas Andalas Vol 3, No 3 (2014)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jbioua.3.3.%p.2014

Abstract

The study about population density and shell size distribution of clam Contradens sp. in Tanjung Mutiara Singkarak Lake, West Sumatra has been conducted on July 2013. This study used stratified purposive sampling method. Sampling site was decided into 3 locations based on human activities, 3 depth strata in each location; <5m, 5-10m and >10-15m. The clams were collected using “dauah” (traditional tool to catch shellfish), 3 sampling plots for each stratum. The result showed that the highest average population density (2.596 ind/m2) was found in location III followed location II (0.055 ind/m2) and location I (0.155 ind/m2). Based on strata, the highest average population density (1.941 ind/m2) was at >10-15m depth, there was no clam found at <5m depth. The largest clam concentrated  at >10-15m depth in location III (without human activity area) whereas small to medium clam concentrated at 5-10m depth.Keywords: clam, Contradens sp., population density, size distribution, Singkarak Lake.
Komposisi dan Struktur Komunitas Zooplankton di Danau Diatas, Sumatera Barat Sulis Setiawati; Izmiarti Izmiarti; Nofrita Nofrita
Bioeksperimen: Jurnal Penelitian Biologi Vol 4, No 2: September 2018
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/bioeksperimen.v4i2.6880

Abstract

Penelitian tentang komposisi dan struktur komunitas zooplankton pada di Danau Diatas, Solok Sumatera Barat telah dilakukan pada bulan April sampai September 2016. Penelitian ini bertujuan untuk mengetahui komposisi dan struktur komunitas zooplankton di Danau Diatas kabupaten Solok, Sumatera Barat. Penelitian ini menggunakan metoda Purposive Sampling di empat stasiun. Sampel Zooplankton diambil menggunakan pompa air Alkon dan planktonnet.  Zooplankton yang didapatkan 44 spesies dengan komposisi Protozoa 5 spesies, Rotifera 22 spesies, Cladocera 13 spesies, dan Copepoda 4 spesies. Kepadatan total 20683,58 ind/l. indeks diversitas di Danau Diatas yaitu berkisar 1,043 -1,45. Indeks equitabilitas berkisar 0,31-0,54. Berdasarkan strata indeks equitabilitas berkisar 0,42-0,52, dan komunitas antar stasiun relatif seragam dengan indeks similaritas 53,06-61,53%. Study of composition and community structure zooplankton of Diatas Lake, Solok District, West Sumatera, from April until September 2016. The purpose of this research was to know the composition and structure of zooplankton. The research was conducted by using Purposive Sampling method with four research station. the samples by using water pomp machine and plankton net. The result showed that zooplankton it was found 44 zooplankton species with composition of Protozoa 5 species, 22 species of Rotifers, 13 species of Cladocera, and 4 species Copepods. The population diversity average 1723,6 ind/l.  diversity index (H’) ranged from 1,04 – 1,45, Equitability index (E) ranged from 0,31-0,54, Sorensen Similarity index ranged from 53,06 – 61,53 %.  
KEPADATAN, KEANEKARAGAMAN DAN POLA DISTRIBUSI GASTROPODA DI DANAU DIATAS, KABUPATEN SOLOK, PROVINSI SUMATERA BARAT Sindi Mardatila; Izmiarti Izmiarti; Jabang Nurdin
Biocelebes Vol. 10 No. 2 (2016)
Publisher : Biology Department, Mathematics and natural science, Tadulako University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (316.388 KB)

Abstract

The study about Diversity and Distribution Patterns of Gastropods On Littorall Zones in Lake Diatas, Solok regency, West Sumatra, had been conducted from April to June 2015. Purposes of this study are to determine the diversity and distributeon patterns of gastropods in the littoral zone of the Lake Diatas. This research was conducted using a survey methods and gastropods sampling with purposive sampling. Six stations were chosen as sampling location with 1-1.5 meters depth using squared plot size of 60 x 60 cm2 and divided into 4 sub-plots. The result showed diversity index of gastropods of over all population in the lake above1,21 and population density of 284,17ind/m2. The highest index value diversity of gastropods populations found in station Villa is 1.70 and the lowest was found in Gelagah station 0,67. The total value of the highest population densities gastropods found in Gelagah station which is 518,33 ind/m2, and the lowest density at the Villa station is 142,78 ind/m2. The distribution pattern in the Lake Diatas of gastropods are clustered, whereasthe distribution pattern at each station varies from uniform and clumped. Factorsc hemical and physic swater conditions at Lake Diatas still support life of Gastropods and density is very influenced by the substrate. Keyword: Gastropod, Diversity, Density, Distribution Pattern,Littoral zone.
Co-Authors - Afrizal - Afrizal Abd. Rasyid Syamsuri Afrizal S Anjas Anjas, Anjas Bimo Premono Chairul Chairul Dea Rahayu Silviana Gusna Merina Herdina Putra Hirzan Riyandi Husnul Mar’i Indah Yusliga Sari Purba Indra Junaidi Zakaria Jabang Nurdin Marusin, Neti Mhd Nur Allatif Misren Ahyuni Muhammad Ikhsan Muhammad Syahid Ridho muryani, nova Nasution, Risda Afifi Nofrita Nofrita Nofrita Nofrita Putri Aliyyanti Putri, Eggy Triana Reza Oktavia Rizaldi Rizaldi Saidina Bima Serly Marselina Arifin, Serly Marselina Sindi Mardatila Solfiyeni Solfiyeni Suci Frimanozi Sulis Setiawati Suwirmen, Suwirmen Vivi Safitri Vivi Savitri Zozy Aneloi Noli