Relevant bibliographies by topics / Sediment diversity

Academic literature on the topic 'Sediment diversity'

Author: Grafiati
Published: 10 December 2022
Last updated: 28 January 2023

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Contents

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Sediment diversity.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Sediment diversity"

1

Misson, Benjamin, Cédric Garnier, and Alexandre J. Poulain. "Limited influence of marine sediment lyophilization on prokaryotic community structure assessed via amplicon sequencing: an example from environmentally contrasted sediment layers in Toulon harbor (France)." PeerJ 9 (April 7, 2021): e11075. http://dx.doi.org/10.7717/peerj.11075.

Full text
Abstract:
Sediment lyophilization is a common process that allows for long-term conservation and sharing of marine sediments for multiple downstream analyses. Although it is often used for geochemical studies, the effects of lyophilization on prokaryotic taxonomic diversity assessment remained to be assessed. Here, we tested the effect of lyophilization on microbial diversity assessment using three sediment layers corresponding to various sediment ages and chemical contamination levels sampled from a marine Mediterranean harbor. Duplicate DNA samples were extracted from wet frozen or lyophilized sediments, and 16S rRNA gene amplicon sequence variants were analyzed. We detected changes in community structure over depth linked to both dominant and less abundant taxa whether sediments were lyophilized or not. Data from both wet frozen and lyophilized sediments led us to conclude that historical chemical contamination of the sediment of Toulon Bay did not appear to be the main environmental variable shaping prokaryotic community structure on the vertical dimension, but that sediment diagenesis was. We conclude that sediment lyophilization is compatible with marine biogeochemical and ecotoxicological studies but that caution should be used when discussing small variations among samples.
APA, Harvard, Vancouver, ISO, and other styles
2

Indrayani, Wiwin Try, Haeruddin Haeruddin, and Supriharyono Supriharyono. "Konsentrasi Nitrat dan Fosfat pada Sedimen dan Hubungannya dengan Kelimpahan dan Keanekaragaman Makrozoobentos di Sungai Kreo Semarang Relationship of Nitrate and Phosphate Consetration in Sediments with Macrozoobhentos Abundance and Diversity in Kreo River Semarang." Management of Aquatic Resources Journal (MAQUARES) 9, no. 1 (June 12, 2020): 1–7. http://dx.doi.org/10.14710/marj.v9i1.27752.

Full text
Abstract:
ABSTRAKSungai Kreo merupakan suatu ekosistem yang di dalamnya terdapat beberapa komponen yang saling berinteraksi. Zat hara nitratdan fosfat biasanya terkandung di dalam air dan sedimen. Peranan nitrat dan fosfat yang terkandung dalam sedimen yang ada di sungai adalah sebagai unsur penting bagi pertumbuhan dan kelangsungan mikroorganisme dasar perairan. Tujuan penelitian ini yakni mengetahui konsentrasi nitrat dan fosfat pada sedimen, mengetahui jenis tekstur sedimen, mengetahui kelimpahan dan keanekaragaman makrozoobentos dan menganalisis hubungan konsentrasi nitrat dan fosfat pada sedimen dengan kelimpahan dan Keanekaragaman makrozoobentos di Sungai Kreo Semarang. Metode penelitian yang digunakan adalah metode eksplanatif. Penentuan stasiun sampling menggunakan teknik purposive sampling. Analisis data menggunakan uji regresi linier berganda dengan software SPSS 16. Hasil penelitian menunjukkan bahwa konsentrasi nitrat berkisar 0,14 mg/l - 0,63 mg/l. Konsentrasi fosfat berkisar 0,01 mg/l - 0,11 mg/l. Jenis sedimen stasiun I: lempung liat berpasir, stasiun II: pasir berlempung dan stasiun III : pasir. Spesies Makrozoobentos yang ditemukan adalah kelas gastropoda (Sulcospira sp, Melanoides sp, Brotia sp Annetome sp, Tarebia sp). Keanekaragaman jenis termasuk dalam keanekaragaman yang rendah (0,23 - 0,25). Hubungan konsentrasi nitrat fosfat terhadap kelimpahan dan keanekaragaman termasuk hubungan kuat (r = 0,675). ABSTRACTKreo River is an ecosystem in which there are several interacting components. Nitrate and phosphate nutrients are usually contained in water and sediments. The role of nitrate phosphate contained in sediments in rivers is an important element for the growth and survival of aquatic microorganisms. The purpose of this study was to determine the concentration of nitrate, phosphate sediment and the type of sediment texture in Semarang Kreo River. As well, to investigate the abundance and diversity of macrozoobentos in the Semarang Kreo River, analyzing the relationship of nitrate and phosphate concentrations in sediments with abundance of macrozoobentos in Semarang Kreo River. The study method was used the explanatory method. Sampling was used purposive sampling technique. Data analysised were multiple linear regression test with SPSS 16 software. The results of study showed that the concentration of nitrate was around 0.14 mg/l - 0.63 mg/l. Phosphate concentrations ranged from 0.01 mg/l - 0.11 mg/l. Station I sediment types: sandy clay loam, station II: clay sand and station III: sand. Macrozoobentos genus found were the gastropod class (Sulcospira sp, Melanoides sp, Brotia sp, Annetome sp, Tarebia sp). The diversity of macrozoobentos is included in the low diversity (0,23-0,25). The strong relationship was found between nitrate phosphate concentration and the abundance and diversity (r = 675).
APA, Harvard, Vancouver, ISO, and other styles
3

Helton, Rebekah R., and K. Eric Wommack. "Seasonal Dynamics and Metagenomic Characterization of Estuarine Viriobenthos Assemblages by Randomly Amplified Polymorphic DNA PCR." Applied and Environmental Microbiology 75, no. 8 (February 13, 2009): 2259–65. http://dx.doi.org/10.1128/aem.02551-08.

Full text
Abstract:
ABSTRACT Direct enumeration and genetic analyses indicate that aquatic sediments harbor abundant and diverse viral communities. Thus far, synecological analysis of estuarine sediment viral diversity over an annual cycle has not been reported. This oversight is due in large part to a lack of molecular genetic approaches for assessing viral diversity within a large collection of environmental samples. Here, randomly amplified polymorphic DNA PCR (RAPD-PCR) was used to examine viral genotypic diversity within Chesapeake Bay sediments. Using a single 10-mer oligonucleotide primer for all samples, RAPD-PCR analysis of sediment viral assemblages yielded unique banding patterns across spatial and temporal scales, with the occurrence of specific bands varying among the sample set. Cluster analysis of RAPD-PCR amplicon banding patterns indicated that sediment viral assemblages changed with season and to a lesser extent with geographic location. Sequence analysis of RAPD-PCR amplicons revealed that 76% of sediment viral sequences were not homologous to any sequence in the GenBank nonredundant protein database. Of the GenBank sequence homologs, the majority belonged to viruses within the Podoviridae (24%) and Myoviridae (22%) viral families, which agrees with the previously observed frequencies of these morphological families in Chesapeake Bay sediments. Furthermore, the majority of the sediment viral sequences homologous to GenBank nonredundant protein sequences were phages or prophages (57%). Hence, RAPD-PCR proved to be a reliable and useful approach for characterization of viral assemblages and the genetic diversity of viruses within aquatic sediments.
APA, Harvard, Vancouver, ISO, and other styles
4

Tan, Ling, Hui Yun, Xia Yi Xu, Jia He, Hai Yan Wu, Guan Zhou Qiu, Xin Xing Liu, and Jian Ping Xie. "Comparative Analysis of Functional Gene Diversity of Acid Mine Drainage and its Sediment by Geochip Technology." Solid State Phenomena 262 (August 2017): 531–36. http://dx.doi.org/10.4028/www.scientific.net/ssp.262.531.

Full text
Abstract:
The diversity of microbial community is well studied in past decades, however, the functional gene diversity in AMD and sediment are still unclear. In this study, four samples, which included two mine drainages and two sediments were taken from two typical copper mines in the southeast of China. Community DNA from the AMD and corresponding sediments were were extracted, purified, amplified, labeled and hybridized with GeoChip 2.0. The results showed that total 28, 126, 1131, 1875 functional genes were detected in DX_110, YP_NK, DX_110N, YP_NKN, respectively, which including carbon and nitrogen fixation, carbon degradation, methane metabolism, ammonification, nitrification, denitrification, nitrogen reduction, sulfur reduction and metal resistance genes. Sediment nearby the mine drainage may play an important role in microbial geochemical processes, since more functional genes and higher diversity were detected in sediment than in AMD.
APA, Harvard, Vancouver, ISO, and other styles
5

Weisbrod, Barbara, Susanna A. Wood, Konstanze Steiner, Ruby Whyte-Wilding, Jonathan Puddick, Olivier Laroche, and Daniel R. Dietrich. "Is a Central Sediment Sample Sufficient? Exploring Spatial and Temporal Microbial Diversity in a Small Lake." Toxins 12, no. 9 (September 9, 2020): 580. http://dx.doi.org/10.3390/toxins12090580.

Full text
Abstract:
(1) Background: Paleolimnological studies use sediment cores to explore long-term changes in lake ecology, including occurrences of harmful cyanobacterial blooms. Most studies are based on single cores, assuming this is representative of the whole lake, but data on small-scale spatial variability of microbial communities in lake sediment are scarce. (2) Methods: Surface sediments (top 0.5 cm) from 12 sites (n = 36) and two sediment cores were collected in Lake Rotorua (New Zealand). Bacterial community (16S rRNA metabarcoding), Microcystis specific 16S rRNA, microcystin synthetase gene E (mcyE) and microcystins (MCs) were assessed. Radionuclide measurements (210Pb, 137Cs) were used to date sediments. (3) Results: Bacterial community, based on relative abundances, differed significantly between surface sediment sites (p < 0.001) but the majority of bacterial amplicon sequence variants (88.8%) were shared. Despite intense MC producing Microcystis blooms in the past, no Microcystis specific 16S rRNA, mcyE and MCs were found in surface sediments but occurred deeper in sediment cores (approximately 1950′s). 210Pb measurements showed a disturbed profile, similar to patterns previously observed, as a result of earthquakes. (4) Conclusions: A single sediment core can capture dominant microbial communities. Toxin producing Microcystis blooms are a recent phenomenon in Lake Rotorua. We posit that the absence of Microcystis from the surface sediments is a consequence of the Kaikoura earthquake two years prior to our sampling.
APA, Harvard, Vancouver, ISO, and other styles
6

Coates, John D., Debra J. Ellis, Elizabeth L. Blunt-Harris, Catherine V. Gaw, Eric E. Roden, and Derek R. Lovley. "Recovery of Humic-Reducing Bacteria from a Diversity of Environments." Applied and Environmental Microbiology 64, no. 4 (April 1, 1998): 1504–9. http://dx.doi.org/10.1128/aem.64.4.1504-1509.1998.

Full text
Abstract:
ABSTRACT To evaluate which microorganisms might be responsible for microbial reduction of humic substances in sedimentary environments, humic-reducing bacteria were isolated from a variety of sediment types. These included lake sediments, pristine and contaminated wetland sediments, and marine sediments. In each of the sediment types, all of the humic reducers recovered with acetate as the electron donor and the humic substance analog, 2,6-anthraquinone disulfonate (AQDS), as the electron acceptor were members of the familyGeobacteraceae. This was true whether the AQDS-reducing bacteria were enriched prior to isolation on solid media or were recovered from the highest positive dilutions of sediments in liquid media. All of the isolates tested not only conserved energy to support growth from acetate oxidation coupled to AQDS reduction but also could oxidize acetate with highly purified soil humic acids as the sole electron acceptor. All of the isolates tested were also able to grow with Fe(III) serving as the sole electron acceptor. This is consistent with previous studies that have suggested that the capacity for Fe(III) reduction is a common feature of all members of theGeobacteraceae. These studies demonstrate that the potential for microbial humic substance reduction can be found in a wide variety of sediment types and suggest thatGeobacteraceae species might be important humic-reducing organisms in sediments.
APA, Harvard, Vancouver, ISO, and other styles
7

Steyaert, Maaike, Nelia Garner, Dirk van Gansbeke, and Magda Vincx. "Nematode communities from the North Sea: environmental controls on species diversity and vertical distribution within the sediment." Journal of the Marine Biological Association of the United Kingdom 79, no. 2 (April 1999): 253–64. http://dx.doi.org/10.1017/s0025315498000289.

Full text
Abstract:
Nematode assemblages were sampled seasonally at three subtidal stations along the Belgian coast. The stations were characterized by muddy sediments (station 115), fine sand (station 702) and fine to coarse sand (station 790). The forces structuring vertical distribution were investigated by evaluating abundance, species composition, diversity and trophic composition, and relating these to sediment composition, redox state and food sources.The nematode assemblages at the two finer grained stations (115, 702) were dominated by Daptonema tenuispiculum and Sabatieria punctata. For both species, the vertical distribution in the sediment seemed not dependent on the redoxchemistry, as former believed for S. punctata, but primarily influenced by food availability. This feature could also be recognized for Ixonema sordidum and Viscosia langrunensis, the most abundant nematodes at the coarse sandy station (790).In general, nematode diversity was regulated primarily by sediment granulometry. Coarser sediments (station 790) yielded more diverse communities compared to the fine sediments (station 115, 702), however seasonal fluctuations and variations with depth into the sediment were not obvious. At the silty stations, when the sediment column was more oxidized in March, overall diversity was higher and showed a positive relationship to the mud content which varied with depth into the sediment. This positive relation is probably explained by an enhanced deposition of organic matter associated with the accumulation of fine particles near the river-mouths. Furthermore, the higher abundance, the lower diversity and the higher dominance found at the two silty stations of the eastern and the western part of the Belgian coast, pointed to a stressed, organically enriched environment.The results demonstrate that controls on nematode community structure are complex and that information at both species and community level are required to properly evaluate the effects of natural and anthropogenic impacts.
APA, Harvard, Vancouver, ISO, and other styles
8

Najah, Safirotun, Haeruddin Haeruddin, and Arif Rahman. "Hubungan Zat Hara (HNO3- dan HPO4-) pada Sedimen terhadap Kelimpahan dan Keanekaragaman Makrozoobentos di Kaligarang, Semarang Relationship between Sediment Fertility And Macrozoobenthos Abundance and Diversity in the Kaligarang, Semarang." Management of Aquatic Resources Journal (MAQUARES) 9, no. 1 (June 12, 2020): 31–39. http://dx.doi.org/10.14710/marj.v9i1.27757.

Full text
Abstract:
ABSTRAK Kaligarang merupakan sungai yang berada diantara pemukiman penduduk yang menghasilkan limbah rumah tangga. Limbah tersebut merupakan sumber nitrat dan fosfat yang mempengaruhi kesuburan sedimen sungai. Peran nitrat dan fosfat dalam sedimen yaitu sebagai unsur hara yang secara tidak langsung dibutuhkan makrozoobentos untuk kelangsungan hidupnya. Faktor yang mempengaruhi secara langsung yaitu bahan organik dan tekstur sedimen. Tujuan penelitian ini adalah mengetahui konsentrasi nitrat dan fosfat dalam sedimen perairan Kaligarang. Mengetahui kelimpahan dan keanekaragaman makrozoobentos di Kaligarang. Menganalisis konsentrasi nitrat dan fosfat pada sedimen dengan kelimpahan dan keanekaragaman makrozoobentos di Kaligarang. Penelitian ini dilakukan 2 kali pada bulan Juni 2019 dengan metode purposive sampling. Variabel yang diukur yaitu tekstur sedimen, nitrat dan fosfat, bahan organik total, pH sedimen, oksigen terlarut, dan alkalinitas. Analisis data menggunakan analisis regresi linear sederhana dengan software SPSS 16. Hasil penelitian yang telah dilakukan konsentrasi nitrat berkisar 0,19 – 0,35 mg/l dan konsentrasi fosfat berkisar 0,05 – 0,17 mg/l . Makrozoobentos yang ditemukan Clea Helena, Melanoides sp., Mieniplotia sp., dan Tarebia sp. Kelimpahan yang tertinggi yaitu C. helena senilai 4044 dan kelimpahan terendah Mieniplotia sp. senilai 44 individu/m2. Indeks keanekaragaman makrozoobentos 0,26 – 0,89. Hubungan nitrat dengan kelimpahan makrozoobentos dengan r=0,99 tergolong tinggi, korelasi fosfat dengan kelimpahan makrozoobentos yaitu r=0,38 yang tergolong rendah. Korelasi nitrat dengan keanekaragaman makrozoobentos tergolong rendah dengan r =0,18 dan korelasi fosfat dengan keanekaragaman makrozoobentos tergolong tinggi dengan r =0,87. ABSTRACT Kaligarang is a river that is located in a residential area that produces an household waste. The waste is a source of nitrate and phosphate which give an affect the fertility of river sediments. The role of nitrate and phosphate in sediments is as a nutrient needed by microorganisms for survival. The purpose of this study is to determine the concentration of nitrate and phosphate in Kaligarang waters sediments, Know the abundance and diversity of macrozoobenthos in Kaligarang and analyze the relationship of sediment fertility with abundance and diversity of macrozoobenthos in Kaligarang. The research has be done two samplings in June 2019 with a purposive sampling method. The measured variables are sediment texture, nitrate and phosphate, total organic matter, pH sediment, dissolved oxygen, and alkalinity. Data analysis using multiple linear regression analysis with SPSS 16 software. The results of studies that have been carried out nitrate concentrations ranged from 0,19 – 0,35 mg /l and phosphate concentrations ranged from 0,05 – 0,17 mg /l. Macrozoobentos found by Clea helena, Melanoides sp., Mieniplotia sp., and Tarebia sp. The highest abundance was C. helena with a value of 4044 and the lowest abundance with Mieniplotia sp with 44 individuals / m2. Diversity index macrozoobentos of 0,26 – 0,89. The correlation of nitrate correlation with abundance macrozoobentos of 0,99 is classified as high, the correlation of phosphate with abundance macrozobentos of r=0,38 is classified as low. The correlation of nitrate with diversity mcrozoobentos is low r= 0.18 and phosphate correlation with diversity macrozoobentos is high with r=0,87.
APA, Harvard, Vancouver, ISO, and other styles
9

Ariawan, Febio, Haeruddin Haeruddin, and Arif Rahman. "HUBUNGAN ZAT HARA (HNO3-DAN PO4-) SEDIMEN TERHADAP KELIMPAHAN DAN KEANEKARAGAMAN MAKROZOOBENTOS DI SUNGAI BANJIR KANAL BARAT, SEMARANG Relationship between Sediment Fertility and Macrozoobenthos Abundance and Diversity in the Banjir Kanal Barat River, Semarang." Management of Aquatic Resources Journal (MAQUARES) 8, no. 4 (January 28, 2020): 300–308. http://dx.doi.org/10.14710/marj.v8i4.26548.

Full text
Abstract:
Sungai Banjir Kanal Barat membutuhkan perhatian serius dari berbagai elemen masyarakat, dikarenakan sungai ini banyak digunakan oleh masyarakat. Kandungan nutrien yang ada di sedimen berpengaruh terhadap keanekaragaman dan kelimpahan makrozoobentos jika semakin berlimpah dan beranekaragam maka sungai itu memiliki kesuburan yang tinggi. Tujuan penelitian ini untuk mengetahui tekstur, konsentrasi nitrat dan fosfat pada sedimen, kelimpahan dan keanekaragaman makrozoobentos serta hubungan antara kesuburan pada sedimen dengan kelimpahan dan keanekaragaman makrozoobentos di Sungai Banjir Kanal Barat, Semarang. Penelitian ini dilaksanakan pada bulan April-Mei 2019 menggunakan teknik purposive sampling dengan total 5 stasiun. Sampel yang diambil berupa sedimen dan makrozoobentos. Metode penentuan sedimen menggunakan metode pemipetan, nitrat fosfat menggunakan spektrofotometri, untuk mengetahui hubungan antara kesuburan dengan kelimpahan dan keanekaragaman menggunakan metode PCA. Hasil penelitian yang telah dilakukan menerangkan bahwa fraksi sand berkisar 10,84-92,04%; fraksi silt berkisar antara 0-70%; fraksi clay berkisar antara 2,80-25,48%. Genus makrozoobentos yang ditemukan dikelompokan menjadi 2 kelas yaitu: Gastropoda (Afropomus sp., Melanoides sp., Terebia sp., Terebra sp., Urosalpinx sp.) dan Bivalvia (Anadara sp., Corbicula sp., Leiosolenussp.). Keanekaragaman jenis makrozoobentos berkisar antara 0,45-1,96 dan termasuk dalam kategori rendah. Kelimpahan individu berkisar antara 15200-42800 ind/m³ dan kelimpahan tertinggi terdapat pada stasiun IV dan stasiun II merupakan kelimpahan terendah. Konsentrasi nitrat dan fosfat sedimen berkisar antara 0,04-0,60 mg/l untuk nitrat lalu konsentrasi fosfat berkisar antara 0,03-1,33 mg/l. Analisis PCA menyatakan konsentrasi nitrat pada sedimen berpengaruh terhadap makrozoobentos. konsentrasi nitrat di sedimen cukup berpengaruh dengan keanekaragaman jenis dan kelimpahan makrozoobentos yang ada diperairan, dan memiliki nilai koefisien korelasi sebesar 0,99 dan 0,87. The Banjir Kanal Barat River needs serious attention from various elements of the community, because the river is widely used by the community. Nutrient content in sediments affects the diversity and abundance of macrozoobenthos. The concentration of nitrate and phosphate in the sediment are used phytopentos, phytopentos is benthic food. macrozoobenthos is a bioindicator of water, if it is more abundant and diverse, the river has high fertility. The purpose of this study was to determine the texture, nitrate and phosphate concentrations in sediments, abundance and diversity of macrozoobenthos and the relationship between fertility in sediments with abundance and diversity of macrozoobenthos in the West Flood River Canal, Semarang. This research was conducted in April-May 2019 using a purposive sampling technique with a total of 5 stations. Samples taken in the form of sediments and macrozoobenthos. The results of the research that have been done explained that the sand fraction ranged from 10.84 to 92.04%; silt fraction ranges from 0-70%; clay fraction ranged from 2.80-25.48%. The macrozoobenthos genus found was classified into 2 classes, namely: Gastropods (Afropomus sp., Melanoides sp., Terebia sp., Terebra sp., Urosalpinx sp.) And Bivalvia (Anadara sp., Corbicula sp., Leiosolenus sp.). Diversity of macrozoobenthos types ranged from 0.45 to 1.96 and included in the low category. Individual abundances ranged from 15200 to 42800 ind / m³ and the highest abundances were at station IV and station II was the lowest abundance. Nitrate and phosphate sediment concentrations ranged from 0,04 to 0,60 mg / l for nitrates and then phosphate concentrations ranged from 0,03 to 1,33 mg / l. PCA analysis resulted that the concentration of nitrate in the sediment affected macrozoobenthos. Nitrate concentration in sediments is quite influential with the diversity of species and abundance of macrozoobenthos in the water, and has a correlation coefficient of 0,99 and 0,87.
APA, Harvard, Vancouver, ISO, and other styles
10

Smorczewski, W. T., and E. L. Schmidt. "Numbers, activities, and diversity of autotrophic ammonia-oxidizing bacteria in a freshwater, eutrophic lake sediment." Canadian Journal of Microbiology 37, no. 11 (November 1, 1991): 828–33. http://dx.doi.org/10.1139/m91-143.

Full text
Abstract:
The microbiological and chemical potential for ammonia oxidation in a freshwater, eutrophic lake sediment was examined in relation to environmental changes caused by seasonal, dimictic circulation. Poulations of both ammonia and nitrite oxidizers as estimated by most probable number (MPN) were sustained throughout extended anaerobic summer intervals, with nitrite oxidizers outnumbering ammonia oxidizers by a factor ranging from 3.0 to 8.1. Ammonia oxidation potential on a per cell basis was affected by seasonal changes and was seen to decrease as oxygen was removed from the sediments. Pure-culture isolations from a positive MPN tube inoculated with oxygenated sediment and representing a single point in a seasonal cycle produced ammonia-oxidizing strains belonging to the genus Nitrosospira. These strains did not react with known ammonia-oxidizer serotypes and, therefore, extend the serological diversity of this group of bacteria. An immunofluorescence analysis of MPN tubes from sediment collected during a period of lake stratification revealed progressive changes in the diversity of the ammonia-oxidizer population. The genera Nitrosomonas, Nitrosolobus, and Nitrosospira, including the novel serotype of Nitrosospira isolated from the sediment a year earlier, were found to coexist in well-oxygenated sediment. This diversity was seen to disappear, with Nistrosomonas surviving, as anaerobic conditions persisted. Key words: ammonia oxidizers, lake sediments, nitrifiers, nitrification.
APA, Harvard, Vancouver, ISO, and other styles
More sources

Dissertations / Theses on the topic "Sediment diversity"

1

Handley, Kim Marie. "Microbial diversity and respiratory processes in hydrothermal sediment." Thesis, University of Manchester, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.492237.

Full text
Abstract:
In marine hydrothermal sediments metal-rich, reduced fluids and oxidised seawater form steep geochemical gradients supporting abundant, but as yet poorly defined, chemosynthetic life and biogeochemical cycling. This project elucidates the functional diversity of chemosynthetic micro-organisms, and metabolic processes on the geochemistry of ferruginous (-50% Fe), arsenic-rich (-400 ppm As) hydrothermal sediment at Santorini, Greece (20-40°C, pH 6.0-6.3, Eh 0 to 155 mV). Culture and molecular-phylogenetic techniques revealed abundant chemosynthetic prokaryotes capable of transforming a range of chemical species common to marine and hydrothermal sediments via: anaerobic Fe(III), sulfate, nitrate and As(V) reduction, and nitrate-dependant Fe(lI) oxidation; micro-aerobic Fe(lI) monosulfide (FeS) oxidation; and aerobic As(lII) and free-sulfide oxidation. Geochemical analyses showed that oxidised species [Fe(III), As(V), sulfate and presumably Mn(IV)] dominated in the suboxic surface sediment layer (0-5 cm deep), but that reduced species [namely Fe(II), As(III), Mn(II)] increased in the lower suboxic-anoxic transition zone (5-20 em depth). From a biological perspective sulfate is the energetically least favourable of the oxidised species to be reduced, and sulfate concentrations were consistent throughout the portion of the sediment column analysed (0-30 em depth). The presence of a black precipitate (probably FeS) at the lower limit of the transition zone, however, did suggest at least a small amount of sulfate reduction was occurring. In contrast, no nitrate was detected indicating rapid reduction of this . energetically favourable compound at· the water-sediment interface. Microbiological and geochemical data, in combination, indicated that redox cycling of Fe, Mn and As were most likely key biogenic processes in biogeochemically stratifying the sediment, whereas S-cycling bacteria were comparatively minor contributors. Other principal findings included the cultivation of a novel neutrophilic Fe(II)-oxidiser related to marine microaerophilic Fe(II)oxidising bacterium Mariprofundus ferroxydans. This bacterium dominated the Fe(lIl) (oxy-)hydroxide-rich surface sediment, and most probably plays a significant role in catalysing suboxic Fe(lI) oxidation. Fe(II)-oxidising prokaryotes comprise a functional group not well understood in marine settings. Additionally, bacteria belonging to a ubiquitous, heterotrophic marine genus, Marinobacter, were shown to oxidise Fe(II). Of these, Marinobacter santoriniensis, was isolated and characterised, and also shown to both oxidise As(llI) and respire As(V), providing a rare example of a marine prokaryote capable of these functions. Futher to this, incubation experiments, conducted to establish the effect of microbial respiration on arsenic mobilisation, demonstrated that microbial Fe(lll) reduction largely controlled shifts in arsenic partitioning in the sediment. Specifically, results support other studies (mainly concerned with the toxic effects of arsenic) showing arsenic sequestration by Fe(II)-bearing minerals. This is contrary to the more common supposition of arsenic release to porewaters upon reductive dissolution of Fe(lIl) minerals. Overall, these results highlight the importance of microbial enzymatic processes in sediment geochemistry.
APA, Harvard, Vancouver, ISO, and other styles
2

Weinmann, Birgit Ellen. "Microphytobenthic diversity and function in estuarine soft sediment." Thesis, University of St Andrews, 2012. http://hdl.handle.net/10023/3664.

Full text
Abstract:
Corophium volutator (Pallas) fit the criteria of ‘ecosystem engineers' as defined by Jones and colleagues (1994, 1997): they are widely distributed within and across North Atlantic estuaries, are often present in intertidal soft sediment in vast numbers, and build semi-permanent burrows in the sediment matrix, which they irrigate continuously. Previous studies have demonstrated that C. volutator burrowing and feeding not only modifies the sediment biogeochemistry but can also modify the overlying water biogeochemistry (during immersion). C. volutator activities have also been shown to be detrimental to microphytobenthic (MPB) biofilms in the immediate vicinity of the burrows. As MPB are the stabilizing force in the estuary, the decimation of biofilm destabilizes the habitat for all the organisms colonising it. However, several aspects of C. volutator ecology remain unclear. First, previous studies on the effect of C. volutator on local (within burrow proximity) MPB diversity have not presented a clear signal as to whether they increase or decrease biodiversity or established whether there is preferential survival amongst MPB taxa with certain cell shapes and sizes or lifestyles. Second, as it has been established that C. volutator have the potential to change the water column, it is possible for them to effect MPB populations remotely (outwith burrow proximity). It is therefore of interest to determine the effects they have, whether such an effect can be achieved within a tidal period, and whether these effects can change MPB biomass, behaviour or diversity over time. A series of controlled mesocosm experiments were carried out to quantify those effects of C. volutator on the water column which were likely to impact MPB survival, to determine whether those effects were specific to C. volutator or common to deposit‐feeding bioturbators, to determine to what degree they could be achieved within a single immersion period, and to separate the effects of C. volutator on MPB bulk (chlorophyll-a in top 5 mm) and photosynthesizing (fluorescing) biomass and diversity both ‘locally' and ‘remotely'. The results of the first 3 experiments consistently showed that C. volutator substantially increased the resuspension of sediment to the overlying water column and that the resulting turbidity could reduce lightpenetration to the sediment by as much as 50% within one immersion period. Results of nutrient fluxes were less consistent and clear within and between experiments but there was some suggestion that increased bioirrigation increased inorganic nitrogen flux to the overlying water column in accordance with previous studies. The effects of C. volutator on local and remote MPB biomass (bulk and surface) and diversity varied between experiments but, broadly speaking: (1) bulk biomass was unaffected, reduced locally, or increased remotely; (2) surface biomass was reduced both locally and remotely; and (3) community diversity (Simpson's diversity index) was consistently unaffected, both locally and remotely. Because increased water column turbidity is the most distinctive calling card of C. volutator but is only likely to affect the photosynthetically active (surface) MPB biomass during immersion, a controlled laboratory experiment was designed to examine the extent to which turbidity could influence MPB migratory behaviour and photosynthetic activity. MPB bulk migration was shown to be driven by sitespecific, entrained rhythms of light availability and spatial variation in light availability only drove micro‐cycling in the photic zone during the immersion period. So, in the absence of C. volutator, or any other turbidity producing phenomenon (deep water columns, high flow rates, physical disturbance, etc.), MPB will remain at the surface to photosynthesize during immersion and the productivity during this period is determined by total light intensity and exposure hours (or ‘light dose'). Therefore, the proximity and size of C. volutator populations to a site is likely to be influential in determining local productivity patterns of MPB. In addition, differences in MPB assemblage composition were shown to influence the biofilm productivity but what drives changes in MPB assemblage composition is still unclear and requires further investigation.
APA, Harvard, Vancouver, ISO, and other styles
3

Edlund, Anna. "Microbial diversity in Baltic Sea sediments /." Uppsala : Dept. of Microbiology, Swedish University of Agricultural Sciences, 2007. http://epsilon.slu.se/200726.pdf.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Vidal, Dura Andrea. "Controls on microbial diversity and sediment biogeochemistry along a dynamic estuary." Thesis, University of Leeds, 2017. http://etheses.whiterose.ac.uk/18218/.

Full text
Abstract:
Estuaries are the transition between freshwater and marine environments, and regulate the delivery of riverine fluxes to the oceans. The Humber estuary (UK) is considered a major source of nutrients to the North Sea. It is a highly turbid and dynamic macrotidal estuary that receives contaminated fluxes from agriculture, urbanisation, industry and historical mining activities. The chemistry of the river water and the sediments is modified within the estuarine continuum due to mixing. Sediments are subjected to resuspension periodically (on a tidal cycle timescale) and occasionally or seasonally (due to extreme rainfall or flooding episodes), which triggers a series of redox processes that control nutrient and pollutant cycling. During simulated sediment resuspension in aerated conditions, the release of accumulated reduced substrates (ammonium, manganese, iron, sulphur) and trace metals were reversed within relatively short timescales, which is important when assessing the environmental consequences of different resuspension episodes. However, the position in the salinity gradient was the dominant control on sediment geochemistry since a transition from the inner estuary (Mn/Fe-dominated redox chemistry) to the outer estuary (Fe/S-dominated redox chemistry) was observed. To better understand the role of the benthic biogeochemical denitrification processes in the nitrogen cycling, nitrate-dependent oxidation was also investigated in microcosm experiments. The same transition was observed in the nitrate reduction coupled with the oxidation of different inorganic species from the inner to the outer estuary. In this oxidation scenario there was also evidence of trace metal mobilisation. Due to the greater availability of electron donors in the mudflats of the outer estuary, they showed the greatest potential for denitrification and therefore are considered a relevant nitrogen sink in the Humber estuary. Furthermore, in this context of highly spatiotemporal variability, benthic microbial diversity showed a decreasing trend with increasing salinity, but sediment mixing and transport and the presence of strong redox transitions were also environmental parameters shaping the microbial communities in the Humber sediments.
APA, Harvard, Vancouver, ISO, and other styles
5

Barua, Sutapa. "Microbial Diversity and Zinc Toxicity to Pseudomonas sp. from Coeur d' Alene River Sediment." Thesis, Montana State University, 2007. http://etd.lib.montana.edu/etd/2007/barua/BaruaS0807.pdf.

Full text
Abstract:
Coeur d'Alene River (CDAR) in northern Idaho is one of the metal contaminated rivers in US. The sediments of the river are enriched with As, Cd, Cu, Pb, and Zn which are toxic metals to humans and animals. It is hypothesized that microorganisms living in this river sediment can remove the metals and thus detoxify their environment. The objective of this work is to investigate the microbial communities existing in CDAR sediment using 16S ribosomal RNA (rRNA) gene sequencing and 16S rRNA gene microarray (PhyloChip) analysis. According to our phylogenetic analysis, the CDAR clones fell into 13 distinct phylogenetic classes including 2 environmental samples, 1 uncultured bacterium, and an unclassified Chloroflexi. The major representative genera found were Thiobacillus (7 of 91), Azoarcus (7/91), Acidobacterium (6/91), Burkholderia (5/91), Flavobacterium (5/91) and Janthinobacterium (5/91). PhyloChip data showed the presence of 1551 operational taxonomic units (OTUs). 97% of the clone library sequences matched at various taxonomic levels with the microarray results. The results from the clone library and PhyloChip have provided the broad picture of the microorganisms found in the metal polluted CDAR sediment. To better understand the metal toxicity kinetics of specific isolates, Pseudomonas sp. strain JM001 from the CDAR sediment was selected for further study. Cell growth and aqueous Zn removal rate of strain JM001 was observed in batch kinetic experiments. It was found that cell growth rate depends on substrate and nutrient concentration and incubation temperature. The minimum inhibitory concentration (MIC) of Zn to the cells was 0.024 mM and the 50% inhibition in specific growth rate was found at 0.011 mM Zn when cells were grown in nutrient limited defined media at 22 °C. The MIC was 1 mM Zn and 50% inhibition occurred at 0.515 mM Zn in minimal salts medium with vitamin solutions at 35 °C. The results are significant to develop a dose-response model that will quantify the effects of toxic metals on microbial growth and inhibition in complex CDAR environment.
APA, Harvard, Vancouver, ISO, and other styles
6

Nguyen, Thi Tuyet Nga. "Analysing the effect of industrial and urban polluted zones on microbial diversity in the SaiGon -DongNai river system (Vietnam)." Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLS582/document.

Full text
Abstract:
Le système fluvial Saigon-Dong Nai (SG- DN) est la plus importante source d'eau pour les douze villes et provinces du sud du Vietnam. Il est aujourd'hui gravement pollué par les activités humaines, agricoles, industrielles et domestiques, constituant une menace pour la vie de millions de personnes. Le ministère vietnamien des Ressources naturelles et de l'environnement a rapporté que les rivières ont reçu environ 1,54 milliard de litres d'eaux usées provenant de 70 parcs industriels par jour, dont 35% de déchets médicaux non traités, et que des tests effectués depuis 2006 ont montré des niveaux élevés de pollution, en particulier de substances toxiques organiques. Jusqu'à présent, il n'y a pas de données sur la diversité microbienne dans le système fluvial SG-DN, en particulier dans les sédiments, où la plus grande partie de la biomasse microbienne est généralement localisée. Les échantillons de sédiments ont été recueillis, réseau hydrographique national SG-DN, à 13 endroits dans les rivières représentant des emplacements pollués. Afin de caractériser les populations microbiennes présentes sur nos sites choisis, l'ADN total des échantillons environnementaux a été extrait et amplifié dans les régions V3 à V1 de l'ADNr 16S. L'étude a révélé que la population microbienne changeait de l'amont vers l'aval au niveau du phylum, du genre et de l'OTU après avoir traversé la zone de population industrielle et dense. De plus, les canaux du bassin versant SG-DN sont fortement pollués par de fortes concentrations de composés organiques (PAH) et possèdent différentes communautés bactériennes par rapport aux échantillons des rivières
The SaiGon-DongNai (SG-DN)river system is the most important major water source for all twelve Southern Vietnam cities and provinces and is now dramatically polluted by industrial and living activities, giving “a threat” to the lives of millions people sharing this water source. The Ministry of Natural Resources and Environment of Vietnam reported that the rivers received around 1.54 billion liters of waste water from 70 industrial parks per day, including 35 percent of untreated medical waste, and tests since 2006 have found pollution in this river has increased to “serious levels”, an especially high concentration of organic toxic substances. Until now, there is no data on the microbial diversity in SG-DN river system especially in the sediments, where most of the microbial biomass is generally located. The sediment samples were collected in 13 locations across the rivers representing warning polluted locations done by Mr. Nguyen Thanh Hung of the National Water Qualifying in SG-DN river system. In order to characterize the microbial populations present at our chosen sites, the total DNA from the environmental samples were extracted and amplified at the V3 to V1 regions of the 16S rDNA. The study revealed that microbial population changed from upstream to downstream at the phylum, genus and OTUs levels after running through the industrial and dense population zone. Moreover, the canals of the SG-DN river catchment are heavily polluted with high concentrations of organic compounds (PAHs) and possessed different bacterial communities compared to the samples from the rivers
APA, Harvard, Vancouver, ISO, and other styles
7

Radl, Viviane. "Influence of trenbolone on the structural and functional diversity of microbial communities from a lake sediment." [S.l.] : [s.n.], 2005. http://deposit.ddb.de/cgi-bin/dokserv?idn=978952626.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Suárez, Suárez Ana Belén. "Sulphate‐reducing bacterial diversity in a calcareous sandy sediment of Mallorca and community response to hydrocarbon contamination." Doctoral thesis, Universitat de les Illes Balears, 2012. http://hdl.handle.net/10803/84117.

Full text
Abstract:
Aquesta tesi tracta sobre l'efecte de la contaminació per cru de petroli sobre l'ecosistema costaner mediterrani i sobre el paper fonamental dels sediments marins en la regulació i el manteniment dels processos biogeoquímics. L'estudi presta especial atenció a les comunitats bacterianes reductores de sulfat i la seva implicació en la degradació de contaminants orgànics. La diversitat, abundància i fisiologia dels bacteris reductors de sulfat que habiten el sediment arenós del nord de Mallorca (Illes Balears), van ser analitzades mitjançant un enfocament polifàsic, basat en la combinació d'experiments in situ i in vitro, biologia molecular clàssica i d’última generació, cultius i determinació d'activitats metabòliques. Els resultats obtinguts durant aquesta tesi demostren que el sediment mediterrani alberga una microbiota autòctona que podria prosperar després d'un vessament de cru de petroli i el paper de la qual podria ser crucial per a la transformació i l'eliminació de compostos orgànics xenobiòtics en aquest ambient.
Esta tesis trata sobre el efecto de la contaminación por crudo de petróleo en el ecosistema costero mediterráneo y sobre el papel fundamental de los sedimentos marinos en la regulación y el mantenimiento de los procesos biogeoquímicos. El estudio presta especial atención a las comunidades bacterianas reductoras de sulfato y a su implicación en la degradación de contaminantes orgánicos. La diversidad, abundancia y fisiología de las bacterias reductoras de sulfato que habitan el sedimento arenoso del norte de Mallorca (Islas Baleares), fueron analizadas mediante un enfoque polifásico, basado en la combinación de experimentos in situ e in vitro, biología molecular clásica y de última generación, cultivos y determinación de actividades metabólicas. Los resultados obtenidos durante esta tesis demuestran que el sedimento mediterráneo alberga una microbiota autóctona que podría prosperar después de un derrame de crudo de petróleo y cuyo papel podría ser crucial para la transformación y la eliminación de compuestos orgánicos xenobióticos en este ambiente.
This thesis discusses the fate and behave of crude oil contamination in the Mediterranean coastal ecosystem, and the essential role of the marine sediments in the regulation and maintenance of biogeochemical processes. The study pays particular attention to the role of sulphate reducing bacterial communities in the degradation of organic matter and pollutants entering the Mediterranean environment. A polyphasic approach based in the combination of in situ and in vitro experiments, next generation and classical molecular biology, cultivation, and the determination of metabolic activities, provided first insights into the diversity, abundance and physiology of sulphate reducing bacteria inhabiting the undisturbed sandy sediment at the north of Mallorca (Balearic Islands). The results obtained during the thesis demonstrate that the undisturbed Mediterranean sediment harbours an autochthonous microbiota that could prosper after a crude oil spill and which role might be crucial for the transformation and removal of hazardous organic compounds in this environment.
APA, Harvard, Vancouver, ISO, and other styles
9

Haynes, K. "Bacterial diversity in intertidal sediment : the effect of algal-derived carbohydrates : an in situ and microcosm approach." Thesis, University of Essex, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.437824.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Mansoori, Amir Reza. "Study on Flow and Sediment Transport around Series of Spur Dikes with Different Head Shape." 京都大学 (Kyoto University), 2014. http://hdl.handle.net/2433/192160.

Full text
APA, Harvard, Vancouver, ISO, and other styles
More sources

Books on the topic "Sediment diversity"

1

Hunt, Carolyn E. Metal concentrations and algal microfossil diversity in pre-industrial (pre-1880) sediment of lakes located on the Sudbury Igneous Complex (SIC) in Sudbury, Ontario, Canada. Sudbury, Ont: Laurentian University, School of Graduate Studies, 2003.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
2

Edlund, Anna. Microbial diversity in Baltic Sea sediments. Uppsala: Swedish University of Agricultural Sciences, 2007.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
3

Raudkivi, A. J. Sedimentation: Exclusion and removal of sediment from diverted water. Rotterdam: A. A. Balkema, 1993.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
4

H, Wall Diana, ed. Sustaining biodiversity and ecosystem services in soils and sediments. Washington: Island Press, 2004.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
5

Traunspurger, Walter, ed. Ecology of freshwater nematodes. Wallingford: CABI, 2021. http://dx.doi.org/10.1079/9781789243635.0000.

Full text
Abstract:
Abstract This book, with its 12 chapters, not only encourages all ecologists to consider free-living nematodes as a model organism in their investigations, but also shows how important it is to study the fundamentals of ecology, for example, the distribution and diversity of a group of organisms as well as the interactions of those organisms with others. Detailed studies of this type will ultimately provide a better understanding of food webs, their role in the respective habitat, and the changes therein caused by human activities. In this context, research during the past 20 years has determined that, in addition to aquatic environments, nematodes are good indicators of sediment and soil quality. This book takes into account much of the recent research on the ecology of freshwater nematodes. It contains many new chapters as well as revisions and updates of the chapters of the 2006 book. The objective was to write a comprehensive yet readable guide for interested biologists, from students to career scientists.
APA, Harvard, Vancouver, ISO, and other styles
6

S, Hall G., Lasserre Pierre, and Hawksworth D. L, eds. Methods for the examination of organismal diversity in soils and sediments. Wallingford, Oxon, UK: CAB International in association with United Nations Educational, Scientific and Cultural Organization (UNESCO) and the International Union of Biological Sciences (IUBS), 1996.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
7

Cunningham & Gannuch Brown. Report on feasibility of small scale physical model of the lower Mississippi River Delta for testing water and sediment diversion projects. [Baton Rouge, La.?]: Louisiana Dept. of Natural Resources, 2004.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
8

Vaill, J. E. Chemical characteristics of bottom sediments in the Colorado River upstream from the Price-Stubb Diversion Dam near Palisade, Colorado, October-November 1998. [Grand Junction, CO]: U.S. Dept. of the Interior, U.S. Geological Survey, 2000.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
9

Sheppard, Charles R. C., Simon K. Davy, Graham M. Pilling, and Nicholas A. J. Graham. Microbial, microalgal and planktonic reef life. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198787341.003.0005.

Full text
Abstract:
Microbes, including bacteria, archaea, viruses, fungi, protozoans and microalgae, are the most abundant and arguably the most important members of coral reef communities. They occur in the water column and sediment, and in association with other reef organisms. This chapter describes the abundance, diversity, function and productivity of microbes, with an emphasis on free-living types. They are key to recycling and retention of organic matter via the ‘microbial loop’, and are an important food source for larger reef organisms. The metazoan zooplankton are also described, including larvae of most reef invertebrates and fish. They are described in terms of their duration in the plankton, their settlement behaviour (e.g. that of coral larvae), their daily migration patterns and their role as a food source for larger organisms. Their importance for inter-reef connectivity is discussed.
APA, Harvard, Vancouver, ISO, and other styles
10

Taberlet, Pierre, Aurélie Bonin, Lucie Zinger, and Eric Coissac. Some early landmark studies. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198767220.003.0011.

Full text
Abstract:
Chapter 11 entitled “Some early landmark studies” revisits several seminal articles that paved the way for the field of eDNA research. It first evokes the paper that first coined the expression “environmental DNA” in the late 1980s. Then, it describes how eDNA was first exploited in the early 1990s to reveal an unsuspected microbial diversity that morphology- or cultivation-based methods had failed to reach. In the late 1990s, microbiologists began to explore in several pioneer papers the functional insight provided by “metagenomes” (i.e., the collective genomes found in eDNA samples). In the 2000s, eDNA analysis was finally extended to macroorganisms. Chapter 11 reports such a use in two very different contexts (i.e., the detection of a contemporary invasive species, the bullfrog, and the reconstruction of past plant and animal communities from sediment and permafrost samples).
APA, Harvard, Vancouver, ISO, and other styles
More sources

Book chapters on the topic "Sediment diversity"

1

Coyne, Mark S., and James A. Tiedje. "Distribution and Diversity of Dissimilatory NO 2 − Reductases in Denitrifying Bacteria." In Denitrification in Soil and Sediment, 21–35. Boston, MA: Springer US, 1990. http://dx.doi.org/10.1007/978-1-4757-9969-9_2.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Bhat, Sandhya, and Pamposh. "Effect of Pollution on the Sediment Bacterial Diversity and Composition in Najafgarh Lake, Delhi." In Sustainable Climate Action and Water Management, 113–23. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-15-8237-0_9.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Greer, C. W. "Bacterial Diversity in Hydrocarbon-Polluted Rivers, Estuaries and Sediments." In Handbook of Hydrocarbon and Lipid Microbiology, 2329–38. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-540-77587-4_169.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Littke, Ralf, and Laura Zieger. "Formation of Organic-Rich Sediments and Sedimentary Rocks." In Hydrocarbons, Oils and Lipids: Diversity, Origin, Chemistry and Fate, 1–18. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-319-54529-5_14-1.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Littke, Ralf, and Laura Zieger. "Formation of Organic-Rich Sediments and Sedimentary Rocks." In Hydrocarbons, Oils and Lipids: Diversity, Origin, Chemistry and Fate, 475–92. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-319-90569-3_14.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Pham, Huynh A., Carolyn E. Oldham, and Jason J. Plumb. "The Diversity of Benthic Microorganisms in Acidic Mine Lake Sediments." In Advanced Materials Research, 489–92. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-452-9.489.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Xu, Xirong, Hongwu Tang, and Wangyu Qin. "Techniques of Water Diversion and Sediment Prevention in Estuary Regions." In Advances in Water Resources and Hydraulic Engineering, 1044–48. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-540-89465-0_183.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Kato, Chiaki, Shizuka Arakawa, Takako Sato, and Xiang Xiao. "Culture-Independent Characterization of Microbial Diversity in Selected Deep-Sea Sediments." In High-Pressure Microbiology, 219–36. Washington, DC, USA: ASM Press, 2014. http://dx.doi.org/10.1128/9781555815646.ch13.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Sass, Henrik, and R. John Parkes. "Sub-seafloor Sediments: An Extreme but Globally Significant Prokaryotic Habitat (Taxonomy, Diversity, Ecology)." In Extremophiles Handbook, 1015–41. Tokyo: Springer Japan, 2011. http://dx.doi.org/10.1007/978-4-431-53898-1_49.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Widdicombe, S., and M. C. Austen. "Setting diversity and community structure in subtidal sediments: The importance of biological disturbance." In Coastal and Estuarine Studies, 217–31. Washington, D. C.: American Geophysical Union, 2005. http://dx.doi.org/10.1029/ce060p0217.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Sediment diversity"

1

Massonnat, Gérard Joseph, Charles Danquigny, Emmanuelle Leonforte, Lucie Dal Soglio, Mickael Barbier, and Jean-Louis Lesueur. "A Multi-Process Reservoir Modelling Workflow as the Key for Unlocking Reservoir Prediction in Carbonates. Application to a Sector Model from the Albion R&D Project." In Abu Dhabi International Petroleum Exhibition & Conference. SPE, 2021. http://dx.doi.org/10.2118/207556-ms.

Full text
Abstract:
Abstract In carbonate reservoirs, because of the diversity of geological processes involved in the reservoir construction, the extrapolation of properties directly from well data to reservoir model gridblocks may lead to poorly predictive reservoir properties and then production forecasts. This paper proposes a modelling workflow in which new tools from disruptive technologies are associated in order to produce reservoir models consistently with reservoir geological construction. The workflow combines the simulation of the depositional facies and their transformation after diagenesis overprint. Original depositional facies are carried out from SED-RES™, a stratigraphic forward modelling software that generates and transports carbonate sediments according to ecological conditions and wind-induced currents. Then GODIAG™, a lattice gas, reproduces the evolution of the properties of the sediment after it has been deposited. The diagenesis history can be multi-stage and can involve different kinds of physical and chemical reactions. This new workflow has been evaluated in the framework of the ALBION R&D Project dedicated to the study of the Barremian-Aptian rudist-rich carbonate platform from south France that is known as an analogue of the Kharaib and Shuaiba reservoirs (UAE). Thanks to its multi-scale and multi-site aspect, ALBION offers the opportunity to test new modelling tools. The efficiency of the new workflow has been successfully applied on a sector model from an ALBION site on which a rich geological and petrophysical dataset is available from outcrops and numerous wells,
APA, Harvard, Vancouver, ISO, and other styles
2

Shephard, Eugene, Nelson Walter, Heath Downey, Peter Collopy, and John Conant. "Remediation of Uranium Impacted Sediments in a Watercourse." In ASME 2013 15th International Conference on Environmental Remediation and Radioactive Waste Management. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/icem2013-96115.

Full text
Abstract:
In 2009, remediation was initiated for a non-operational fuel cycle facility previously used for government contract work located in Windsor, Connecticut, USA. Radiological contaminants consisted primarily of high enriched uranium (HEU). Other radionuclides encountered in relatively minor amounts in certain areas of the clean-up included Co-60, Cs-137, Ra-226, Th-232 and low enriched uranium (LEU). Between 2009 and the spring of 2011, remediation efforts were focused on demolition of contaminated buildings and removal of contaminated soil. In the late spring of 2011, the last phase of remediation commenced involving the removal of contaminated sediments from portions of a 1,200 meter long gaining stream. Planning and preparation for remediation of the stream began in 2009 with submittal of permit applications to undertake construction activities in a wetland area. The permitting process was lengthy and involved securing permits from multiple agencies. However, early and frequent communication with stakeholders played an integral role in efficiently obtaining the permit approvals. Frequent communication with stakeholders throughout the planning and remediation process also proved to be a key factor in timely completion of the project. The remediation of the stream involved the use of temporary bladder berms to divert surface water flow, water diversion piping, a sediment vacuum removal system, excavation of sediments using small front-end loaders, sediment dewatering, and waste packaging, transportation and disposal. Many safeguards were employed to protect several species of concern in the work area, water management during project activities, challenges encountered during the project, methods of Final Status Survey, and stream restoration.
APA, Harvard, Vancouver, ISO, and other styles
3

Miller, Gregory. "Mississippi River - West Bay Sediment Diversion." In World Water and Environmental Resources Congress 2004. Reston, VA: American Society of Civil Engineers, 2004. http://dx.doi.org/10.1061/40737(2004)402.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

WANG, BO, and Y. JUN XU. "BEDLOAD TRANSPORT AT THE MISSISSIPPI-ATCHAFALAYA RIVER DIVERSION." In International Conference on Coastal Sediments 2019. WORLD SCIENTIFIC, 2019. http://dx.doi.org/10.1142/9789811204487_0251.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Robichaux, Patrick, Kehui Xu, Kyle Straub, Qi Li, and Xiaoyu Sha. "THE IMPACT OF POLYMERS ON SEDIMENT ERODIBILITY AND ITS IMPLICATION TO SEDIMENT DIVERSION." In 50th Annual GSA South-Central Section Meeting. Geological Society of America, 2016. http://dx.doi.org/10.1130/abs/2016sc-273288.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Ho Shong Hou, Mingshun Lee, and Percy Hou. "Shihmen sediment prevention diversion tunnel planning and design." In International Conference on Energy and Sustainable Development: Issues and Strategies (ESD 2010). IEEE, 2010. http://dx.doi.org/10.1109/esd.2010.5598793.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Negi, Keizo, Keizo Negi, Takuya Ishikawa, Takuya Ishikawa, Kenichiro Iba, and Kenichiro Iba. "MEASURES FOR ENVIRONMENT CONSERVATION IN ENCLOSED COASTAL SEAS." In Managing risks to coastal regions and communities in a changing world. Academus Publishing, 2017. http://dx.doi.org/10.31519/conferencearticle_5b1b940c149362.66419597.

Full text
Abstract:
Japan experienced serious water pollution during the period of high economic growth in 1960s. It was also the period that we had such damages to human health, fishery and living conditions due to red tide as much of chemicals, organic materials and the like flowing into the seas along the growing population and industries in the coastal areas. Notable in those days was the issues of environment conservation in the enclosed coastal seas where pollutants were prone to accumulate inside due to low level of water circulation, resulting in the issues including red tide and oxygen-deficient water mass. In responding to these issues, we implemented countermeasures like effluent control with the Water Pollution Control Law and improvement/expansion of sewage facilities. In the extensive enclosed coastal seas of Tokyo Bay, Ise Bay and the Seto Inland Sea, the three areas of high concentration of population, we implemented water quality total reduction in seven terms from 1979, reducing the total quantities of pollutant load of COD, TN and TP. Sea water quality hence has been on an improvement trend as a whole along the steady reduction of pollutants from the land. We however recognize that there are differences in improvement by sea area such as red tide and oxygen-deficient water mass continue to occur in some areas. Meanwhile, it has been pointed out that bio-diversity and bio-productivity should be secured through conservation/creation of tidal flats and seaweed beds in the view point of “Bountiful Sea” To work at these challenges, through the studies depending on the circumstances of the water environment in the enclosed coastal seas, we composed “The Policy of Desirable State of 8th TPLCS” in 2015. We have also added the sediment DO into the water quality standard related to the life-environmental items in view of the preservation of aquatic creatures in the enclosed water areas. Important from now on, along the Policy, is to proceed with necessary measures to improve water quality with good considerations of differences by area in the view point of “Beautiful and bountiful Sea”.
APA, Harvard, Vancouver, ISO, and other styles
8

Negi, Keizo, Keizo Negi, Takuya Ishikawa, Takuya Ishikawa, Kenichiro Iba, and Kenichiro Iba. "MEASURES FOR ENVIRONMENT CONSERVATION IN ENCLOSED COASTAL SEAS." In Managing risks to coastal regions and communities in a changing world. Academus Publishing, 2017. http://dx.doi.org/10.21610/conferencearticle_58b4316091bec.

Full text
Abstract:
Japan experienced serious water pollution during the period of high economic growth in 1960s. It was also the period that we had such damages to human health, fishery and living conditions due to red tide as much of chemicals, organic materials and the like flowing into the seas along the growing population and industries in the coastal areas. Notable in those days was the issues of environment conservation in the enclosed coastal seas where pollutants were prone to accumulate inside due to low level of water circulation, resulting in the issues including red tide and oxygen-deficient water mass. In responding to these issues, we implemented countermeasures like effluent control with the Water Pollution Control Law and improvement/expansion of sewage facilities. In the extensive enclosed coastal seas of Tokyo Bay, Ise Bay and the Seto Inland Sea, the three areas of high concentration of population, we implemented water quality total reduction in seven terms from 1979, reducing the total quantities of pollutant load of COD, TN and TP. Sea water quality hence has been on an improvement trend as a whole along the steady reduction of pollutants from the land. We however recognize that there are differences in improvement by sea area such as red tide and oxygen-deficient water mass continue to occur in some areas. Meanwhile, it has been pointed out that bio-diversity and bio-productivity should be secured through conservation/creation of tidal flats and seaweed beds in the view point of “Bountiful Sea” To work at these challenges, through the studies depending on the circumstances of the water environment in the enclosed coastal seas, we composed “The Policy of Desirable State of 8th TPLCS” in 2015. We have also added the sediment DO into the water quality standard related to the life-environmental items in view of the preservation of aquatic creatures in the enclosed water areas. Important from now on, along the Policy, is to proceed with necessary measures to improve water quality with good considerations of differences by area in the view point of “Beautiful and bountiful Sea”.
APA, Harvard, Vancouver, ISO, and other styles
9

Redhouse, Elliot, Bobbi J. Padilla, Robert Mahon, Antoinette Abeyta, Anjali Fernandes, and Travis Swanson. "ANALYZING SEDIMENT ACCUMULATION FROM FLOODWATER DIVERSION, BONNET CARRE SPILLWAY, LA." In GSA 2020 Connects Online. Geological Society of America, 2020. http://dx.doi.org/10.1130/abs/2020am-356158.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Andrus, T. Mitchell, and Samuel J. Bentley. "Sediment Flux and Fate in the Mississippi River Diversion at West Bay: Observation Study." In Sixth International Symposium on Coastal Engineering and Science of Coastal Sediment Process. Reston, VA: American Society of Civil Engineers, 2007. http://dx.doi.org/10.1061/40926(239)55.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Reports on the topic "Sediment diversity"

1

Sobecky, Patricia A. Plasmid Diversity and Horizontal Transfer in Marine Sediment Microbial Communities. Fort Belvoir, VA: Defense Technical Information Center, February 2002. http://dx.doi.org/10.21236/ada399348.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Gailani, Joseph, Burton Suedel, Andrew McQueen, Timothy Lauth, Ursula Scheiblechner, and Robert Toegel. Supporting bank and near-bank stabilization and habitat using dredged sediment : documenting best practices. Engineer Research and Development Center (U.S.), August 2022. http://dx.doi.org/10.21079/11681/44946.

Full text
Abstract:
In-water beneficial use of dredged sediment provides the US Army Corps of Engineers (USACE) the opportunity to increase beneficial use while controlling costs. Beneficial use projects in riverine environments include bank and near-bank placement, where sediments can protect against bank erosion and support habitat diversity. While bank and near-bank placement of navigation dredged sediment to support river-bank stabilization and habitat is currently practiced, documented examples are sparse. Documenting successful projects can support advancing the practice across USACE. In addition, documentation identifies data gaps required to develop engineering and ecosystem restoration guidance using navigation-dredged sediment. This report documents five USACE and international case studies that successfully applied these practices: Ephemeral Island Creation on the Upper Mississippi River; Gravel Island Creation on the Danube River; Gravel Bar Creation on the Tombigbee River; Wetland Habitat Restoration on the Sacramento-San Joaquin River Delta; and Island and Wetland Creation on the Lower Columbia River Estuary. Increased bank and near-bank placement can have multiple benefits, including reduced dredge volumes that would otherwise increase as banks erode, improved sustainable dredged sediment management strategies, expanded ecosystem restoration opportunities, and improved flood risk management. Data collected from site monitoring can be applied to support development of USACE engineering and ecosystem restoration guidance.
APA, Harvard, Vancouver, ISO, and other styles
3

Brown, Gary, and Kimberly Pevey. Hydrodynamic, salinity, and morphological modeling study of a sediment diversion : an application of the Adaptive Hydraulics Model/SEDLIB Sediment Transport Library. Engineer Research and Development Center (U.S.), March 2019. http://dx.doi.org/10.21079/11681/32445.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Gambill, Daniel, Matthew Stoklosa, Sean Matus, Heidi Howard, and Garrett Feezor. White Sands Missile Range Thurgood Canyon watershed : analysis of Range Road 7 for development of best management practices and recommendations. Engineer Research and Development Center (U.S.), September 2022. http://dx.doi.org/10.21079/11681/45622.

Full text
Abstract:
Thurgood Canyon, located on White Sands Missile Range (WSMR), contains an alluvial fan that is bisected by a primary installation road and is in the proximity of sensitive fish habitats. This project was initiated to determine if and how sensitive fish habitats at the base of the fan are impacted by the existing drainage infrastructure and to assess the condition and sustainability of the existing transportation infrastructure. Findings show that the current drainage infrastructure maintains flow energy and sediment carrying capacity further down the fan than would occur in its absence. However, frequent to moderately rare (small to medium) flood events dissipate over 2 km from sensitive habitat, and overland flow and sediment do not reach the base of the fan. Controlled flow diversion is recommended upstream of the road to mitigate infrastructure or habitat impacts during very rare (very large) flood events. A comprehensive operation and management approach is presented to achieve sustainable transportation infrastructure and reduce the likelihood of impacts to the sensitive habitat.
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the extended bibliographies on the topic 'Sediment diversity' for particular source types:
Journal articles Dissertations / Theses Books
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography