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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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Journal : Jurnal Biologi Universitas Andalas

 1   2 
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.
Water Quality Bioassessment Using Macrozoobenthos In The Batang Arau River, Padang City Saidina Bima; Izmiarti Izmiarti; Nofrita Nofrita
Jurnal Biologi Universitas Andalas Vol 10, No 2 (2022)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jbioua.10.2.70-77.2022

Abstract

Research on Water Quality Bioassessment Using Macrozoobenthic in the Batang Arau River, Padang City was carried out in March - September 2021. This study aims to determine the composition and structure of the macrozoobenthic community and water quality in the Batang Arau River based on the BMWP-ASPT index. This research uses the survey method and station determination by purposive sampling, based on environmental conditions. Macrozoobenthic samples were collected by using Surber net 30x30 cm2 and Eckman grab 15x15 cm2, and physical and chemical factors were also measured. The results showed that the macrozoobenthic communities found in the Batang Arau River were 37 genera with the composition of 6 genera Gastropods, 28 genera Insect, 2 genera Hirudinea, and 1 genus Oligochaeta. The total density of macrozoobenthic ranged from 140-1775 ind/m2 with the highest density at Station V and the lowest at Station III. The predominant genus (KR ≥ 10%) found at each station varied, Station I and Station II were Orthocladius and Caenis; Station III was Polypedium, Orthocladius, Baetis, and Elophila, Station IV was Orthocladius, Caenis, Erpobdella, Hellopdella, and Tubifex, and Station V was Melanoides. The diversity index of macrozoobenthic (H') in the Batang Arau River was 2.38 ranging from 0.5-2.57 classified as low to moderate, and the distribution of the macrozoobenthic population (E) is 0.65, ranging from 0.25-0.8 classified as uneven to equally. The water quality in the Batang Arau River based on the BMWP-ASPT index at Stations I and II are classified as unpolluted, Station III was lightly polluted, Station IV was moderately polluted, and Station V was heavily polluted.
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 Sulis Setiawati Suwirmen, Suwirmen Vivi Safitri Vivi Savitri Zozy Aneloi Noli