scholarly journals Dinamika Struktur Komunitas Mikroalga Kodominan Waduk Sutami Malang Akibat Penambahan Variasi Konsentrasi Deterjen secara Ex-Situ

2019 ◽  
Vol 25 (1) ◽  
pp. 68-74
Author(s):  
Titik Wijayanti
Keyword(s):  
Organic Matter ◽  
Community Structure ◽  
Dissolved Oxygen ◽  
Abiotic Factors ◽  
Water Reservoir ◽  
Ex Situ ◽  
Total Organic Matter ◽  
Detergent Concentration ◽  
Phosphate Nitrate ◽  
Four Levels

The study aims to determine the response of microalgae community structure codominant and abiotic factors change Sutami Malang waters due to the addition of the detergent concentration variation in ex-situ. The experiment was conducted in September 2007 to March 2008. The addition of the detergent concentration consists of four levels, namely D0 (0 ppm), D1 (0.1 ppm), D2 (2 ppm) and D3 (4 ppm) of detergent to the water reservoir. Variable dynamics of microalgae abundance and abiotic factors waters observed simultaneously and periodically every five days for 40 days. The results showed that increasing the concentration of detergent changing dynamics of microalgae community structure codominant. Detergents suppress the growth Ceratium at a concentration ≥ 0.1 ppm. Instead detergent Synedra population increases until day 30 and stimulate the growth of Microcystis. During the 40 days of observation, abiotic factors change due to the addition of detergent concentration, especially the increase in conductivity, Total Organic Matter, phosphate, nitrate and surfactant. In contrast to lower CO2-free detergents and Dissolved Oxygen. Changes in abiotic factors significantly affect the growth of microalgae codominant.

Effet de certains paramètres physico-chimiques sur les relations prédateurs–proies dans les populations de copépodes cyclopoïdes des mares temporaires d'eau douce

1986 ◽  
Vol 64 (1) ◽  
pp. 8-11
Author(s):  
Louise Vallières ◽  
Antoine Aubin
Keyword(s):  
Organic Matter ◽  
Body Size ◽  
Dissolved Oxygen ◽  
Water Temperature ◽  
Feeding Ecology ◽  
Mineral Content ◽  
Abiotic Factors ◽  
Size Class ◽  
Regression Analyses ◽  
Physical And Chemical

Copepod populations of three temporary freshwater pools (Alnus unit, Carex unit, and Molinia unit) were studied using a standard approach (species versus abiotic factors) and a holistic one (body size and feeding ecology). Multiple regression analyses of data indicate that the physical and chemical features of water (temperature, pH, dissolved oxygen, mineral content, and depth) explain 62 to 98% of the variability of carnivorous copepods, while the abundance of their prey accounts for much less. No size class of prey seems to be preferred. The abundance of decaying organic matter, typical of such pools, would result in an overabundance of prey. Predators would then be under the control of nonalimentary factors.

scholarly journals ANALISIS KESUBURAN PERAIRAN WADUK JATIBARANG BERDASARKAN DISTRIBUSI DAN KELIMPAHAN BAKTERI HETEROTROFIK

2017 ◽  
Vol 5 (4) ◽  
pp. 443-452
Author(s):  
Siti Nur Hidayah ◽  
Niniek Widyorini ◽  
Pujiono Wahyu Purnomo
Keyword(s):  
Organic Matter ◽  
Flood Control ◽  
Heterotrophic Bacteria ◽  
Organic Matter Content ◽  
Water Reservoir ◽  
Temporal Distribution ◽  
Matter Content ◽  
Plate Count ◽  
Total Organic Matter ◽  
Total Plate Count

ABSTRAKWaduk Jatibarang terletak di Kecamatan Gunungpati, Kota Semarang. Waduk tersebut digunakan sebagai pengendali banjir, tempat pariwisata, kegiatan menangkap ikan, dan rencana akan dibuat sebagai sumber air bersih melalui PDAM. Pemanfaatan waduk untuk berbagai keperluan kemungkinan dapat menurunkan kualitas air dari waduk tersebut. Penelitian ini mengkaji kesuburan perairan Waduk Jatibarang berdasarkan distribusi dan kelimpahan bakteri heterotrofik. Bakteri heterotrofik berperan penting dalam sistem perairan sebagai perombak dan meremineralisasi bahan-bahan organik menjadi komponen anorganik sederhana. Tujuan dari penelitian ini adalah untuk mengetahui distribusi kelimpahan bakteri heterotrofik, kandungan bahan organik total, hubungan kelimpahan bakteri heterotrofik dengan bahan organik total, dan status kesuburan waduk Jatibarang. Metode yang digunakan dalam penelitian ini adalah metode deskriptif bersifat studi kasus.  Sampling dilakukan pada tanggal 27 April dan 11 Mei 2016 di lima (5) stasiun dengan kedalaman 1 meter. Penghitungan kelimpahan bakteri menggunakan metode Total Plate Count (TPC). Pengujian kandungan bahan organik total menggunakan metode Titrimetri Permanganat SNI 06-6989.22-2004. Hasil pengamatan menunjukkan distribusi spasial-temporal bakteri heterotrofik fluktuatif dan relatif tinggi, dengan kelimpahan berkisar (45 – 131) x 105 cfu/ml. Kandungan bahan organik total berkisar 11,771 - 21,883 mg/l. Hubungan antara bakteri heterotrofik dengan bahan organik total yaitu hubungan yang terbalik menunjukkan tidak adanya hubungan antara keduanya. Status kesuburan perairan Waduk Jatibarang berdasarkannilai kelimpahan bakteri heterotrofik (45 – 131) x 105cfu/ml > (22 – 120) x 105 cfu/ml dan kandungan bahan organik total 11,771 – 21,883 mg/l perairan bersifat eutrofik. Kata kunci: Waduk Jatibarang; bakteri heterotrofik; bahan organik total; eutrofik ABSTRACTJatibarang Reservoirs located in District Gunungpati, Semarang. The reservoir are used as flood control, the tourism, fishing activities, and the plan will be created as a source of clean water through the taps. Utilization of reservoirs for various purposes may reduce the quality of the water reservoir. This study examines the productivity waters Jatibarang Reservoir based on the distribution and abundance of heterotrophic bacteria. Heterotrophic bacteria play an important role in aquatic systems as to change and remineralize organic materials into simple inorganic components. The purpose of this study was to determine the distribution of the abundance of heterotrophic bacteria, total organic matter content, abundance of heterotrophic bacteria relationships with total organic matter and productivity status Jatibarang Reservoirs. The method used in this research is descriptive case study. The sampling was conducted on April 27 and May 11, 2016 in five (5) stations with a depth of 1 meter. Calculation of the abundance of bacteria using Total Plate Count (TPC). Tests using a total organic matter content titrimetric method SNI 06-6989.22-2004 permanganate. The results showed the spatial-temporal distribution of heterotrophic bacteria volatile and relatively high, with an abundance range (45-131) x 105cfu/ml. Total organic matter content ranges (11.771 - 21.883) mg/l. The relationship between of heterotrophic bacteria with total organic material that is an inverse relationship showed no relationship between both. The productivity status of the dam water Jatibarang based on the abundance of heterotrophic bacteria (45-131) x 105cfu/ml > (22-120) x 105cfu/ml and organic matter content of the total 11.771 - 21.883 mg/l  waters are eutrophic.Keywords: Jatibarang Reservoir; heterotrophic bacteria; total organic matter; eutrophic

scholarly journals STRUKTUR KOMUNITAS MAKROZOOBENTOS DI PERAIRAN TELUK JAKARTA

2017 ◽  
Vol 13 (2) ◽  
pp. 105
Author(s):  
Sri Turni Hartati ◽  
Awwaluddin Awwaluddin
Keyword(s):  
Water Quality ◽  
Organic Matter ◽  
Community Structure ◽  
Diversity Index ◽  
Homogeneity Index ◽  
Total Organic Matter ◽  
Dominance Index ◽  
Water Condition ◽  
Substrate Texture ◽  
Low Diversity

Analisis struktur komunitas makrozoobentos dilakukan terkait dengan upaya pemantauan kondisi perairan Teluk Jakarta dengan membagi perairan ini menjadi 4 wilayah, yaitu A, B, C, dan D. Zona A terletak terjauh dari daratan, kurang lebih 20 mil dan wilayah D semakin mendekat daratan dengan jarak kurang lebih 5 mil. Analisis yang dilakukan meliputi komposisi jenis, kepadatan, keanekaragaman, keseragaman, dominansi, dan beberapa parameter kualitas perairan yang mendukung seperti kedalaman, suhu, kecerahan, kecepatan arus, salinitas, oksigen terlarut (DO), pH, total organik matter, dan tekstur substrat. Hasil penelitian menunjukkan bahwa makrozoobentos yang ditemukan terdiri atas 5 kelas, 42 famili dan 63 genera. Pada wilayah A ditemukan makrozoobentos dari kelas Scaphopoda, Gastropoda, Bivalva, Malacostraca, dan Polychaeta yang didominasi oleh Scaphopoda. Pada wilayah B, C, dan D ditemukan makrozoobentos dari kelas Bivalva, Scaphopoda, Gastropoda, dan Malacostraca, jenis yang mendominasi ke-3 wilayah tersebut adalah Bivalva. Kepadatan makrozoobentos berkisar antara 2,2x103 sampai dengan 3,2x105 ind.m-2. Indeks Keanekaragaman berkisar antara 0,55 sampai dengan 2,95 yang berarti keanekaragaman rendah. Indeks Keseragaman berkisar antara 0,14 sampai dengan 0,79, nilai tersebut termasuk dalam kategori rendah sampai dengan tinggi. Nilai Indeks Dominansi berkisar antara 0,17 sampai dengan 0,86 yang berarti dominansi rendah sampai dengan tinggi. Dominansi terjadi di wilayah D yaitu di stasiun D4 dengan jenis dominan Donax sp. dari kelas Bivalva. Parameter perairan Teluk Jakarta pada umumnya cukup mendukung untuk kehidupan makroozoobentos. The community structure analysis on macrozoobenthos was conducted in relation to the monitoring action of water condition on Jakarta Bay. The bay was classified into 4 zones, such as A, B, C,and D. The zone A is located approximately 20 miles from land and the zone D is nearest (5 miles) from land. The analysis comprised of species composition, abundance, diversity, homogeneity, dominance, and other parameters of water quality such as depth, temperature, tranparancy, current velocity, salinity, dissolved oxygen, pH, total organic matter, and substrate texture. The results show that there were 5 classes of macrozoobenthos, consisting of 42 families and 63 genera. There were Scaphophods, Gastrophods, Bivalvas, Malacostracans, and Polychaetas found in zone A with regard to Scaphophods domination. There were only Bivalvas, Scaphophods, Gastrophods, and Malacostracans found in zone B, C, and D with regard to Bivalvas domination. The abundance of these macrozoobenthos ranged from 2.215 to 323.100 ind.m-2. The diversity index ranged from 0.55 to 2.95 indicating low diversity. The homogeneity index ranged from 0.14 to 0.79, indicating the low to high category. The dominance index was about 0.17 to 0.86, showing the variety water condition. A species, Donax sp. (Bivalva) was most dominant in Zone D (St D4) The parameters of water qualitying Jakarta Bay might be in general to support the life of macrozoobenthos.

scholarly journals An Ecological Study of Free-living Marine Nematodes in Teluk Awar, Sarawak, Malaysia

1970 ◽  
Vol 2 (1) ◽  
pp. 1-10 ◽  
Author(s):  
Cheng-Ann Chen ◽  
Shabdin Mohd Long ◽  
Norliana Mold Rosli
Keyword(s):  
Organic Matter ◽  
Environmental Variables ◽  
High Tide ◽  
Chemical Characteristic ◽  
High Water ◽  
Horizontal Distribution ◽  
Ex Situ ◽  
Special Focus ◽  
Total Organic Matter ◽  
Physico Chemical

The community structure of marine nematode assemblages in the southern-west of Borneo was investigated with special focus on the horizontal distribution from high tide to subtidal area. A transect study had been conducted in Teluk Awar. Nine stations were chosen from the Mean High Water Neap to Mean Low Water Neap level. The physico-chemical characteristic of water and sediments were determined both ex situ. One-way ANOVA showed that the environmental variables among stations were significantly different (except chlorophyll a and total organic matter). Multi-dimensional scaling demonstrated three distinct patterns among the stations while dendrogram showed high dissimilarity percentage in the species distribution among stations. In conclusion, the results showed that environmental variables such as clay, total organic matter and temperature were affecting the nematode distribution pattern in Teluk Awar.

HEAVY METAL SPECIATION IN BOTTOM SEDIMENTS OF THE VYSHNEVOLOTSKY RESERVOIR

2018 ◽  
pp. 46-54
Author(s):  
O. A. Lipatnikova
Keyword(s):  
Heavy Metal ◽  
Organic Matter ◽  
Bottom Sediments ◽  
Metal Speciation ◽  
Organic Matter Content ◽  
Water Reservoir ◽  
Matter Content ◽  
Heavy Metal Speciation ◽  
Mobile Forms ◽  
Manganese Hydroxides

The study of heavy metal speciation in bottom sediments of the Vyshnevolotsky water reservoir is presented in this paper. Sequential selective procedure was used to determine the heavy metal speciation in bottom sediments and thermodynamic calculation — to determine ones in interstitial water. It has been shown that Mn are mainly presented in exchangeable and carbonate forms; for Fe, Zn, Pb и Co the forms are related to iron and manganese hydroxides is played an important role; and Cu and Ni are mainly associated with organic matter. In interstitial waters the main forms of heavy metal speciation are free ions for Zn, Ni, Co and Cd, carbonate complexes for Pb, fulvate complexes for Cu. Effects of particle size and organic matter content in sediments on distribution of mobile and potentially mobile forms of toxic elements have been revealed.

scholarly journals Impacts of long-term plant residue management on soil organic matter quality, Pseudomonas community structure and disease suppressiveness

2019 ◽  
Vol 135 ◽  
pp. 396-406 ◽  
Author(s):  
Bryony E.A. Dignam ◽  
Maureen O'Callaghan ◽  
Leo M. Condron ◽  
Jos M. Raaijmakers ◽  
George A. Kowalchuk ◽  
...  
Keyword(s):  
Organic Matter ◽  
Community Structure ◽  
Soil Organic Matter ◽  
Residue Management ◽  
Plant Residue ◽  
Organic Matter Quality ◽  
Soil Organic Matter Quality

scholarly journals Microbial Community Structure Affects Marine Dissolved Organic Matter Composition

2016 ◽  
Vol 3 ◽  
Author(s):  
Elizabeth B. Kujawinski ◽  
Krista Longnecker ◽  
Katie L. Barott ◽  
Ralf J. M. Weber ◽  
Melissa C. Kido Soule
Keyword(s):  
Organic Matter ◽  
Community Structure ◽  
Microbial Community ◽  
Dissolved Organic Matter ◽  
Microbial Community Structure ◽  
Organic Matter Composition

The intake and production of lactating Merino ewes and their lambs grazed at different stocking rates

1977 ◽  
Vol 28 (1) ◽  
pp. 133 ◽  
Author(s):  
JP Langlands
Keyword(s):  
Organic Matter ◽  
Milk Production ◽  
Metabolizable Energy ◽  
Milk Consumption ◽  
Total Organic Matter ◽  
Stocking Rate ◽  
Wool Production ◽  
Maintenance Requirement ◽  
Stocking Rates

Grass and milk consumption and liveweight changes of lambs grazed at stocking rates ranging from 9 to 35 sheep/ha were measured during a 105 day lactation. Grass consumption and wool production of their mothers and of similar ewes without lambs were also determined. The forage and total organic matter intakes of the lamb increased with time while milk consumption declined; all three variables were negatively correlated with stocking rate. The intake of the ewe and its liveweight gain were not sensitive to increasing stocking rate, but wool production declined at higher stocking rates. The maintenance requirement of the ewes was estimated to be 218 kJ metabolizable energy/kg liveweight, and the efficiency with which metabolizable energy was utilized for milk production was 66%. Lactation increased the intake of the ewe but reduced its wool production.

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