sulmin gumiri - Academia.edu (original) (raw)

Papers by sulmin gumiri

Scientific Reports, 2019

The green microalga Botryococcus braunii produces hydrocarbon oils at 25–75% of its dry weight an... more The green microalga Botryococcus braunii produces hydrocarbon oils at 25–75% of its dry weight and is a promising source of biofuel feedstock. Few studies have examined this species’ ecology in natural habitats, and few wild genetic resources have been collected due to difficulties caused by its low abundance in nature. This study aimed to develop a real-time PCR assay for specific detection and quantification of this alga in natural environments and to quantify spatiotemporal variations of wild B. braunii populations in a tropical pond. We designed PCR primers toward the hydrocarbon biosynthesis gene SSL-3 and examined amplification specificity and PCR efficiency with 70 wild strains newly isolated from various environments. The results demonstrated that this PCR assay specifically amplified B. braunii DNA, especially that of B-race strains, and can be widely used to detect wild B. braunii strains in temperate and tropical habitats. Field-testing in a tropical pond suggested a diur...

... 114°0-34"E. surface area 0.65 km2), an oxbow lake along the Kahayan River, in September ... more ... 114°0-34"E. surface area 0.65 km2), an oxbow lake along the Kahayan River, in September 1998 or low water level season and in April-May 1999 or high water level season. ... In high water level season, ie, November-April, the forest surrounding the Sake is inundated widely. ...

Journal of ecotechnology research, 2010

In this study, we adopted the Ambul technology which is a traditional knowledge of indigenous peo... more In this study, we adopted the Ambul technology which is a traditional knowledge of indigenous people of Kalimantan island-Indonesia to grow various crops on a floating decomposed water hyacinth on wetland ecosystem. The study was focused on the effect of water hyacinth cover on water quality and the growth of aquatic microorganism community. We also tested the utilization of water hyacinth as additional food supply for a cage cultured fish. The investigation of the effect of water hyacinth cover on water quality and the growth of aquatic microorganism community was conducted in 2 experimental ponds nearby our laboratory. One pond was treated with water hyacinth, whereas the other was kept intact without water hyacinth, as a control. Water quality in terms of phosphate, nitrate and BOD and also aquatic microorganisms particularly copepod communities were monitored at both ponds prior and after the introduction of water hyacinth. For the purpose of using water hyacinth as additional food supply for cage cultured fish, we established an experimental fish culture in water hyacinth treated and in non water hyacinth treated cages. Fish growth in terms of their weight and length were monitored for 3 months. Our study revealed that water hyacinth effectively absorbed phosphate and reduced BOD and its cover promoted more abundant copepod community. Cultured Osphronemus gouramy fishes supplied with additional food of water hyacinth grew much faster than those cultured in non water hyacinth treated cages. Based on our results, we proposed that the adopted Ambul principle could be used as an alternative technology to overcome the organic water pollution problem both in lake and river ecosystems.

Rotifers are a group of freshwater zooplankton that has been found to inhabit tropical floodplain... more Rotifers are a group of freshwater zooplankton that has been found to inhabit tropical floodplain lakes in high diversity. However, we still have a lack of understanding on the species richness and the ecology of this important group of zooplankton in humic floodplain lakes in the tropics. The present study was conducted in Lake Sabuah and Lake Tundai i.e. two tropical humic floodplain lakes in Central Kalimantan province that differ in terms of their hydrological connectivity to the main river. The purpose was to elucidate the seasonal dynamic of rotifer community in relation to the changing of environmental factor over one year period. The results revealed that high diversity of rotifers was found in both studied lakes i.e. 104 species in Lake Sabuah and 109 species in Lake Tundai. However due to their difference in hydrological connectivity to the main river, rotifers in both lakes exhibited different community composition and dynamics. In Lake Sabuah the predominant species was ...

Habitus Aquatica, 2020

One of common problem in fishing industry is a high mortality rate of juvenile fish during transp... more One of common problem in fishing industry is a high mortality rate of juvenile fish during transportation. The present research aimed to study the characteristics of palm oil activated carbon and its effect on the changes of water quality that can improve the survival rate of juvenile catfish (Pangasius sp.). During study, juvenile catfish was transported for 48 hours by a simulation in the room with two different treatments: water tanks supplied with granulated and powder activated carbon and one control. Results of FTIR analysis showed that the activated carbon contained several functional groups such as Alkanes, Carboxylic Acid and Amina. Activated carbon element content resulted from the SEM analysis consisted of C, O, Si, N, Zr, Cu, Al and K. After transformed as activated carbon, we found that water and organic C contents in oil palm shell decreased and, reversely, the ash content increased. The study revealed that the activated carbon powder was better to improve survival rat...

BIOSAPPHIRE: Jurnal Biologi dan Diversitas

This study aims to identify the species diversity and abundance of insects in the peat swamp fore... more This study aims to identify the species diversity and abundance of insects in the peat swamp forest converted into rice fields in the Peat Techno Park, University of Palangka Raya. The sampling method used three types of traps, namely yellow trap, swing nets,and light traps. The Shanon -Weiner equation was used to calculate the diversity index of the collected insects. The insects that were caught consisted of 10 orders and 49 families with a total 0f 2,089 individuals. The most caught insects were the order Ephemeroptera with a total 730 individuals. The abundance index of Ephemeroptera was 35.04%, Formicidae 11.20%, Coenagrionidae 10,39%, and Tetragnathidae 9,38%. The four of this insects are classified as dominant. The H’ index is 2.5037 where the level of insect diversity is moderate, the dominance index is 0.1626 so that dominance is classified as moderate. The evenness index is 0.6276, which means moderate evenness.

BALANGA: Jurnal Pendidikan Teknologi dan Kejuruan

The aquatic environment can be divided into two based on physical and chemical differences, namel... more The aquatic environment can be divided into two based on physical and chemical differences, namely: freshwater environment and marine aquatic environment. There are two kinds of freshwater waters, namely: calm (lentic) waters such as lakes, reservoirs and ponds; Flowing waters (lotic) for example rivers, sewers and ditches. In lotic habitats there are two main zones, namely the rushing water zone and the hood zone or calm zone. While in calm or lentic waters in general there are three main zones, namely: the littoral zone, the limnetic zone and the profundal zone (Cantonati et al., 2020). A water can be influenced by several factors including temperature, pH, DO and depth, therefore it is very important if in this case it is discussed about the overview of the waters at PTP Universitas Palangka Raya. By researching the parameters above, it can be seen that: Z, temperature, pH, DO. The correlation between DO and depth is -0.35** meaning it is significant at 0.01 or below 0.05. The te...

Environment and Natural Resources Journal

Peatland rehabilitation in Indonesia has been massively carried out since 2016 following a huge f... more Peatland rehabilitation in Indonesia has been massively carried out since 2016 following a huge fire event in 2015. Rehabilitation efforts have so far focused only on burned areas, although non-forested areas and areas with a limited number of juveniles must also be considered for natural regeneration. Spatial mapping can identify areas that need revegetation so that resources can be used more effectively and efficiently. This study aims to map potential areas for peatland rehabilitation by determining the distribution of tree canopy cover using the Forest Canopy Density (FCD) model from Landsat 8 OLI. The area selected for study was Ex-Mega Rice Project (MRP) area in Pulang Pisau district and Palangka Raya city, which burns almost every year. The study identifies eight areas with different levels of Forest Cover Density (FCD). Our field observation confirms that the eight different areas have different levels of natural revegetation. When forest cover is 1-30% of the FCD model, nat...

Anterior Jurnal, 2021

Provinsi Kalimantan Tengah memiliki karakteristik Pulau Kalimantan pada umumnya yang dipenuhi wil... more Provinsi Kalimantan Tengah memiliki karakteristik Pulau Kalimantan pada umumnya yang dipenuhi wilayah hutan, rawa-rawa, hingga lahan gambut yang luas. Selain itu juga dilalui banyak sungai-sungai yang melewati berbagai wilayah daratan Provinsi Kalimantan Tengah dengah Sungai Barito sebagai sungai yang terpanjang hingga mencapai 950 Km, disusul sungai Katingan dengan panjang 650 Km, sungai Kapuas 625 Km dan Sungai Kahayan sepanjang 600 Km. Mereka hidup dari bercocok tanam, berkebun, berburu dan memanfaatkan hasil hutan non kayu dari sekitar areal tersebut. Penelitian ini bertujuan mempelajari tentang Persepsi masyarakat tersebut diatas terhadap pencemaran kualitas air, terutama dalam melindungi Sungai Kahayan sebagai sumber air bersih. Metode penelitian yang dilakukan merupakan Penelitian deskriptis analitis, dimana peneliti mengidentifikasi persoalan dengan melakukan studi awal setelah peneliti mengumpulkan data primer dan data sekunder dengan cara mengolah data yang berasal dari ku...

Pusat Penelitian Limnologi-LIPI, 2002

International Journal of Biology and Biomedical Engineering, 2021

Environmental damage due to natural resource extraction, especially in watershed areas, seems to ... more Environmental damage due to natural resource extraction, especially in watershed areas, seems to be of increasing concern and so far, from the aspect of aquatic and water resources, plankton is commonly used as an indicator of environmental damage. This study explores the distribution of microphyta as a parameter of environmental damage. The research was conducted in Pager watershed, Central Kalimantan and sampled at 2 (two) stations, namely station A (for the right side of the river) and station B (for the left side of the river). The study was conducted 13 sampling times, which began in the period 25 May 2019 ending until 9 November 2019. Laboratory analysis to identify the type and number of microphyta was carried out at the Palangka Raya University Laboratory. The results showed that the number of microphyta taxa at station A (right side of the river) was 12-13 species, more than station B (left side of the river). The number of microphyta taxa at Station B is 8 - 9 species, it ...