THE FATE, DISTRIBUTION, AND TOXICITY OF LINDANE IN TESTS WITH CHIRONOMUS RIPARIUS: EFFECTS OF BIOTURBATION AND SEDIMENT ORGANIC MATTER CONTENT

2003 ◽  
Vol 22 (1) ◽  
pp. 67 ◽  
Author(s):  
Willem Goedkoop ◽  
Märit Peterson
Keyword(s):  
Organic Matter ◽  
Organic Matter Content ◽  
Matter Content ◽  
Chironomus Riparius ◽  
Sediment Organic Matter

scholarly journals Impact of rainfall on spatio-temporal distribution of sediment organic matter along the Chittagong Coast, Bangladesh

2016 ◽  
Vol 3 (1) ◽  
pp. 175-186
Author(s):  
Avijit Talukder ◽  
Debbrota Mallick ◽  
Shamindra Nath Mandal ◽  
Ishrat Zahan Anka ◽  
Milan Kumar Shiuli ◽  
...  
Keyword(s):  
Organic Matter ◽  
High Tide ◽  
Organic Matter Content ◽  
Temporal Distribution ◽  
Matter Content ◽  
Rainfall Pattern ◽  
Sediment Organic Matter ◽  
Precipitation Pattern ◽  
Tide Level ◽  
The Impact

Sediment organic matter regulates the coastal biogeochemical cycle which is influenced by rainfall pattern and has potential relationship with organic carbon as well as mud characteristics. The objective of present research was to identify the impact of precipitation on the spatiotemporal variation inorganic features of intertidal mudflats. Three locations were selected in freshwater zone; two were in brackish water region and last three locations situated in marine waters from Halda to Salimpur coast. Two sites from each location were designated as the highest high tide level (onshore) and lowest low tide level (offshore) of the intertidal zone during winter (December to February) and monsoon (June to August) spanning between 2013 and 2014. Sediment organic matter and carbon were measured by combustion and Walkey-Black wet oxidation in turn. Average organic matter content in monsoon were found 4.5±0.03, 2.3±0.01 and 2.4 in freshwater, brackish and marine locations whereas 5.2±0.6, 3.9±0.14 and 5.4±0.04% investigated during winter. Precipitation pattern varies from different seasons and locations that have impact on land runoff, freshwater inflow, mixing and circulation. Mud dominated coastal intertidal zones represented high organic matter content than sand dominated coast. Furthermore, depositional pattern, transport, erosion-accretion processes, tidal action, wave characteristics and seasonal inconstancy control the organic matter characteristics in the coastal sediment. This research suggests the necessity of periodic observation of rainfall pattern and organic matter distribution to assess the intertidal deposits which support the stabilization of local geomorphology and biogeochemistry in Chittagong coastal region.Res. Agric., Livest. Fish.3(1): 175-186, April 2016

scholarly journals ANALYSIS CONTENT OF ORGANIC MATTER IN SEDIMENT AND ABUNDANCE OF MACROZOOBENTHOS IN TELUK BUO PADANG WEST SUMATERA

2020 ◽  
Vol 2 (3) ◽  
pp. 197-205
Author(s):  
Rinol Putra Utama ◽  
Syahril Nedi ◽  
Afrizal Tanjung
Keyword(s):  
Organic Matter ◽  
Diversity Index ◽  
Organic Matter Content ◽  
Matter Content ◽  
Sediment Organic Matter ◽  
Survey Method ◽  
West Sumatra ◽  
Relationship Of ◽  
The Relationship

This research was conducted in May 2018 in the waters of Teluk Buo, Padang, West Sumatra. The purpose of this study was to determine the environmental quality of the Teluk Buo waters, especially to determine the abundance of macrozoobenthos and determine the relationship between sediment organic matter and abundance of macrozoobenthos. The method used in this study is a survey method. The results of the study note that the waters of the Teluk Buo are included in the medium polluted criteria with a diversity index (H ') ranging from 2.18-3.43, dominance index (C) 0.10-0.32 and uniformity index (e) 0.51-0,78. Abundance ranges from 80-240 ind/m2 with the number of macrozoobenthos species found there are 9 species of gastropods and 5 species of bivalves. The relationship of sediment organic matter content to macrozoobenthos abundance was included in the moderate criteria with a correlation coefficient (r) -0.382.

A watershed level analysis of the lakeshore plant community

1995 ◽  
Vol 73 (4) ◽  
pp. 598-607 ◽  
Author(s):  
Tanya Dolores Holt ◽  
Nicholas Morison Hill ◽  
Ilya Blum
Keyword(s):  
Organic Matter ◽  
Species Richness ◽  
Local Level ◽  
Organic Matter Content ◽  
Matter Content ◽  
Sediment Organic Matter ◽  
Watershed Area ◽  
Landscape Models ◽  
Richness Patterns ◽  
Landscape Level

An investigation was conducted to determine whether the variables, standing crop and sediment organic matter content, related to species richness patterns at the local level, varied at the landscape level in accordance with differences in lake watershed area. Previous study had demonstrated the importance of watershed area as a predictor of species richness of all herbs and of rarities, in particular, on lakeshores. In this study, the reciprocal of watershed area (log units) accounted for over 75% of the variation in biomass at above and below summer waterline positions. Furthermore, watershed area accounted for most of the variation in sediment organic matter content. Above the waterline, shrubs were the predominant growth form at lakes with small watershed areas; the reciprocal of watershed area accounted for 92% of shrub biomass variation. Shoreline plant communities on the lowest watershed area lake were high-biomass, shrub assemblages above waterline and low-biomass, graminoid communities below the waterline. In contrast, above the waterline but below the upper shrub zone on the high watershed area lake, shorelines supported low-biomass assemblages composed of a mixture of shrubs, graminoids, forbs, and ferns. The strong relationships found here between biomass and organic matter and lake watershed area reconcile predictive models made at the within-lake level with those made at the landscape level. Key words: watershed area, landscape models, species richness, community biomass, lakeshores.

scholarly journals Kandungan Bahan Organik dan Karakteristik Sedimen di Perairan Betahwalang, Demak

2021 ◽  
Vol 10 (2) ◽  
pp. 143-150
Author(s):  
Jamaludin Jamaludin ◽  
Sri Sedjati ◽  
Endang Supriyantini
Keyword(s):  
Organic Matter ◽  
Local Population ◽  
High Tide ◽  
Organic Matter Content ◽  
Mangrove Ecosystem ◽  
Matter Content ◽  
Tidal River ◽  
Sediment Organic Matter ◽  
Water Sampling ◽  
Sediment Samples

Betahwalang is a coastal village located in Demak Regency. As a village located in a coastal area, the local population mostly relies on the fisheries sector sourced from sea products. Betahwalang Village has a Mangrove Ecosystem, which is included in the tidal river area of Betahwalang Village. This study aims to look at the comparison of organic matter levels in sediments during tidal and receding river water. Sampling in the field was conducted in March 2019. Sediment samples were taken from 5 stations divided into jetty, mangrove, estuary, and beach areas, where each station was repeated 3 times during high tide and low tide. Analysis of organic matter content of sediment samples using gravimetric methods and data analysis using Non-Parametric Kruskal-Wallis H. The results showed the highest levels of sediment organic matter at station 5 were 74.87 ± 1.81% (low tide) and 66.99 ± 0.38% (high tide) and the lowest sediment organic matter content. at station 4 were 31.56 ± 2.14% (low tide) and 26.93 ± 2.51% (high tide). These results indicate that the organic matter content in the sediment at low tide is higher than at high tide with results that are not significantly different (sig = 0.05).  Betahwalang adalah desa pesisir yang terletak di Kabupaten Demak. Sebagai desa yang terletak di wilayah pesisir, penduduk setempat sebagian besar mengandalkan sektor perikanan yang bersumber dari hasil laut. Desa Betahwalang memiliki Ekosistem Mangrove yang termasuk dalam wilayah sungai pasang surut di Desa Betahwalang. Tujuan dari penelitian ini adalah untuk melihat kondisi perairan sungai Betahwalang ditinjau dari kandungan bahan organik dalam sedimen selama pasang dan surut. Pengambilan sampel di lapangan dilakukan pada bulan Maret 2019. Sampel sedimen diambil dari 5 stasiun yang dibagi menjadi area dermaga, mangrove, muara dan pantai, di mana setiap stasiun diulang 3 kali selama pasang dan surut. Analisis kandungan bahan organik sampel sedimen menggunakan metode gravimetri, dan analisis data menggunakan Non-Parametrik Kruskal-Wallis H. Hasil penelitian menunjukkan kadar bahan organik sedimen tertinggi di stasiun 5 sebesar 74,87 ± 1,81% (air surut) dan 66,99 ± 0,38 % (air pasang) dan  kandungan bahan organik sedimen terendah. di stasiun 4 sebesar 31,56 ± 2,14 % (air surut) dan 26,93 ± 2,51% (air pasang). Hasil ini menunjukkan bahwa kandungan bahan organik dalam sedimen pada saat air surut lebih tinggi daripada saat air pasang dengan hasil yang tidak berbeda nyata (sig=0,05). 

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.

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