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94 results for “Marine Sediment”
SBC LTER: OCEAN: Particulate Organic Matter Content and Composition of Stream, Estuarine, and Marine Sediments
An unprecedented five-year drought in California, coupled with conditions of anomalously low ocean productivity and the prospect of one of the strongest El Niño periods on record with above average rainfall were the impetus for this RAPID award, which seeks to test specific hypotheses pertaining to the origin, distribution, processing, and bioavailability of terrestrial organic matter in coastal marine sediments and their potential for serving as a reservoir of nitrogen storage to fuel nearshore primary production during periods when nitrate concentrations are low. The goals of the research were to: (1) measure bulk properties and biomarker tracers of particulate organic matter (POM) in stream water and in coastal marine sediments at SBC LTER and other reef sites differing in exposure to terrestrial runoff prior to and following large storm events, (2) determine the bioavailability of dissolved organic matter (DOM) released from POM in marine sediments following large runoff events, and (3) measure changes in concentrations of dissolved inorganic and organic nitrogen in pore water of marine sediments near to and distant from stream mouths in the Santa Barbara Channel. Samples were analyzed for organic matter content using a loss-on-ignition combustion method, and samples were also analyzed for organic carbon and nitrogen content and isotopes using a stable isotope mass spectrometer interfaced with an elemental analyzer. Subsamples were shipped to the laboratory of Marc Lucotte at the University of Québec, Montréal for analysis of lignin content using the cupric oxidation method.
Electrical conductivity of the world ocean and marine sediments
<p>Copy of dataset (as was on 2022-01-12) of electrical conductivity and conductance grids for the ocean and marine sediments at 0.1 degree lateral resolution, from https://github.com/agrayver/seasigma. These models are presented in the work</p> <p>Grayver, A. V. (2021). Global 3-D electrical conductivity model of the world ocean and marine sediments. Geochemistry, Geophysics, Geosystems, 22, e2021GC009950. <a href="https://doi.org/10.1029/2021GC009950">doi: 10.1029/2021GC009950</a></p> <p>Please cite this publication if you use the provided models in your work.</p>
SMLBase: Global compilation of surface mixed layer parameters (sedimentation rate, bioturbation depth, mixing intensity) from marine environments
<p>A global compilation of sediment surface mixed layer parameters from marine environments, compiled from published literature. The database contains parameters of advective (sedimentation rate) and diffusive (biodiffusion, bioturbation depth) particle movement estimated from tracer experiments, combined into box models.<br>Database associated with the data report published under <a href="https://doi.org/10.3389/feart.2022.1013174">https://doi.org/10.3389/feart.2022.1013174</a></p>
SBC LTER: Beach: Distribution of terrestrial organic material in intertidal and nearshore marine sediment due to debris flow response efforts
These data describe the distribution and processing of terrestrial organic material observed in the Santa Barbara Channel (Goleta Bay) during the spring of 2018. Specifically, beach, slough, and marine sediments were sampled during and after the debris disposal event that took place between January and February 2018 following the Thomas Fire and the subsequent Montecito Debris Flow. Data are contained in one table, including organic carbon, carbon isotope, lignin phenol, and pyrogenic carbon measurements analyzed from sediment cores collected at different depths and locations in the nearshore region.
Dataset used in "Marine Sediment Characterized by Ocean-Bottom Fiber-Optic Seismology" by Spica et al., 2020 in Geophysical Research Letters
<p>3000fullhisy: raw data to reproduce Fig. 2<br> ppsdspec.npz: all spectrogram as shown in Fig. 3a<br> AllVelMods: All velocity model shown in Fig. 3b<br> ac.out.final.npz: auto-correlation image in Fig. 3c<br> DAS11_lpf5.stack51.grd: Earthquake wavefield as shown in Fig. 3d<br> </p> <p> </p>
The SMaRP database: Sulfate, Methane and Related Parameters in marine sediments
<p>Global dataset on sulfate, methane and related parameters in marine sediments</p>
Data from: macrofaunal diversity patterns in coastal marine sediments: re-examining common metrics and methods
<p>Complex biodiversity patterns arise in marine systems due to overlapping ecological processes, including organism interactions, resource distribution, and environmental conditions. Despite the importance of documenting these patterns, describing diversity in natural ecosystems remains challenging. Here, we investigate three nearshore sub-Arctic sites to describe benthic macroinfaunal taxa and biological traits, with the ultimate aim of determining whether common diversity metrics and typical sampling efforts adequately capture community composition in these systems. First, we assess how diversity relates to sediment depth, and examine relationships among commonly used taxonomic and functional diversity indices. Second, using a power analysis, we explore how sampling effort influences the interpretation of diversity patterns in coastal systems. We report significant variation in community composition among sites, even across small spatial scales of kilometers, and find that taxonomically diverse communities do not necessarily correspond to high functional diversity. We further find that although environmental factors such as sediment depth consistently affect macroinfaunal diversity, the direction and magnitude of these relationships are site dependent. Finally, we demonstrate that typical sampling effort for coastal benthic studies may not capture macroinfaunal community composition adequately, potentially obscuring hotspots in common diversity metrics such as taxonomic or functional richness. Conversely, indices such as Simpson's diversity may be well-suited to resource-limited studies with restricted sampling capacity. Our results highlight the importance of adopting a multi-pronged approach to biodiversity assessment and determining optimal sample sizes for a wide range of marine benthic systems, particularly in the context of biodiversity monitoring for conservation purposes.</p>
Fig. 5 in Small Free-Living Heterotrophic Flagellates from Marine Sediments of Gippsland Basin, South-Eastern Australia
Fig. 5. Dendrogram showing the Bray-Curtis similarity (%) between the communities from 41 habitats; taxonomic information based on species. Species data used for this analysis were from Lee and Patterson (1998), Al-Qassab et al. (2002), Lee et al. (2003, 2005), Lee (2002b, 2006a, b, 2008, 2012), Schroeckh et al. (2003), Aydin and Lee (2012) and the present study. MB – marine benthic habitats, MP – marine planktonic habitats, FB – freshwater benthic habitats, FP – freshwater planktonic habitats. * indicates Australian sites.
Fig. 2. a in Small Free-Living Heterotrophic Flagellates from Marine Sediments of Gippsland Basin, South-Eastern Australia
Fig. 2. a – Chilomastix cuspidata, showing general appearance of cell; b – Goniomonas amphinema, showing general appearance of cell; c – G. pacifica, note two flagella diverging; d – Percolomonas similis, note ventral groove; e – Bodo platyrhynchus; f – Neobodo curvifilus; g – N. saliens; h–i – Hemistasia phaeocysticola, note a papillum (arrow); j – Bordnamonas tropicana, showing general appearance and mouth (arrow); k – Rhynchomonas nasuta; l–o – Rhynchobodo simius; l – tubular ingestion organelle (arrow); m, o – showing groove; n – general appearance of cell; p–q – Rhynchopus amitus; r–s – Spironema multiciliatum; t – Amastigomonas debruynei, general appearance of cell; u – Amastigomonas mutabilis, note anterior flagellum projecting from sleeve and recurrent flagellum; v – Apusomonas sp.; w – Psammosa unguis nov. comb., general appearance of cell; x–y – Mantamonas plastica; x – note anterior flagellum (arrow) and y – ventral depression. All micrographs are DIC images. Scale bar: 5 µm for all figures.
Fig. 1. a in Small Free-Living Heterotrophic Flagellates from Marine Sediments of Gippsland Basin, South-Eastern Australia
Fig. 1. a – Chilomastix cuspidata, b – Rhynchopus amitus, c – Spironema multiciliatum, d – Psammosa unguis nov. comb., e – Apusomonas sp., f – Rhynchobodo formica, g – Mantamonas plastica, h – Roombia truncata, i – Thaumatomastix setifera, j – Ancyromonas impluvium nov. spec., k – Helkesimastix faecicola, l – Kurnaimonas celeris nov. spec., m – Sinistermonas sinistrorsus nov. spec., n – Kiitoksia kaloista, o – Protist '1'. Scale bar: 10 µm for all figures.
Fig. 4. a in Small Free-Living Heterotrophic Flagellates from Marine Sediments of Gippsland Basin, South-Eastern Australia
Fig. 4. a – Carpediemonas membranifera; b – Kipferlia bialata; c – Discocelis saleuta, note a short flagellum; d – Metopion fluens, showing general appearance of cell, note shorter flagellum (arrow); e–f – Kurnaimonas celeris nov. spec., showing general appearance of cell; g – Pseudophyllomitus granulatus; h – Helkesimastix faecicola, showing general appearance and note short flagellum (arrow); i – Metromonas grandis, showing general appearance of cell and note the folded margin on the left side and short flagellum (arrow); j – Metromonas simplex, showing general appearance of cell and note short flagellum (arrow); k – Kiitoksia kaloista, showing two flagella and note short flagellum (arrow); l – Sinistermonas sinistrorsus nov. spec., showing general appearance of cell, and note flagellar insertion and beating pattern of anterior flagellum; m – Telonema subtilis, showing general appearance; n – Protist '1'. All micrographs are DIC images. Scale bar: 5 µm for all figures.
Fig. 3. a–b in Small Free-Living Heterotrophic Flagellates from Marine Sediments of Gippsland Basin, South-Eastern Australia
Fig. 3. a–b – Rhynchobodo formica; c – Massisteria marina, general appearance of cell showing pseudopodia and flagella (arrow); d–f – Cercomonas sp.; d – note two acronematic flagella; e – general appearance; f – note flagellar orientation; g–h – Roombia truncata, note cell attached to the substrate by the tip of the posterior flagellum and note extrusomes; i – Protaspa obliqua, note anterior protrusion; j–k – Thaumatomastix setifera, note spines around the body; j – general appearance of cell; k – ventral face showing a deep groove and pseudopodia; l–m – Ancyromonas sigmoides of different cells; l – note slightly thick anterior flagellum with acronematic tip and broad rostrum; m – note thick anterior flagellum and acute rostrum; n–p – Ancyromonas impluvium nov. spec., showing general appearance of cell and note flagellar insertion. All micrographs are DIC images with the exceptions of (d) and (p) which are phase contrast images. Scale bar: 5 µm for all figures.
The Influence of Diatoms on Hydromechanical Properties of Marine Sediments
<p>Each tab represents the data necessary to re create the graphs in the associated paper "The Influence of Diatoms on Hydromechanical Properties of Marine Sediments". The tabs are in the same order chronoligically as the graphs in the paper.</p>
Database for the Geospatial Synthesis of Biogeochemical Attributions of Porphyrins to Oil Pollution in Marine Sediments of the Gulf of México
<p>This dataset is associated with the journal article "Geospatial Synthesis of Biogeochemical Attributions of Porphyrins to Oil Pollution in Marine Sediments of the Gulf of México" by Muñoz-Arriola and Macias-Zamora (2022). The porphyrin and biogeochemical data were obtained by and analyzed at the Universidad Autónoma de Baja California's Instituto de Investigaciones Oceanológicas. The samples were collected to identify the effects of natural and human-originated oil spills in the Campeche Sound, and these efforts are part of the oceanographic campaign Xaman-Ek.</p> <p> </p> <p>Associated references are:</p> <p>Munoz-Arriola, F. and V. Macias-Zamora (2022) <em>Geospatial Synthesis of Biogeochemical Attributions of Porphyrins to Oil Pollution in Marine Sediments of the Gulf of México</em>. Geosciences. https://doi.org/10.3390/ geosciences12020077.</p> <p>Macias-Zamora, J. V., J. A. Villaescusa-Celaya; A. Munoz-Barbosa; and G. Gold-Bouchot (1999). Trace metals in sediment cores from the Campeche shelf, Gulf of Mexico. Environmental Pollution. Vol 104:69-77.</p> <p> </p>
Fig. 8 in Gyrochorte "highways" and their environmental significance in shallow-marine sediments
Fig. 8. Gyrochorte "highways" documenting a sequorichnial behaviour of the producers from different localities. A, B. Agrio Formation, Cretaceous, Neuquén Basin, Argentina. A. Bed surface showing interference ripples cross-cut by Spongeliomorpha ichsp. (Sp). B. Ripple-trough fill reworked by Chondrites ichsp. (Ch) producers (black doted lines). C. Lajas Formation, Upper Jurassic, Neuquén Basin, Argentina; converging (black arrows), diverging white arrows), and overlapping Gyrochorte ichsp. (white doted line). D. Middle Jurassic, Helvetic realm, exact location not recorded, Switzerland (NMB O157) showing parallel Gyrochorte ichsp., 2 parallel traces (white doted line between them), 3 parallel traces (black doted line between them). Specimens A–C left in the field.
Fig. 6 in Gyrochorte "highways" and their environmental significance in shallow-marine sediments
Fig. 6. Trace fossils co-occurring with "burrowing highways" of Gyrochorte ichsp. A. Mutual cross-cutting of Gyrochorte ichsp. (1, 2) and Phycosiphon incertum Fischer-Ooster, 1856 (Ph) exhibiting typical elbow-shaped turns (white arrows); Gyrochorte comosa Heer, 1865 overprinting Phycosiphon ichsp. (1, white doted line; bilobate crest of Gyrochorte well visible); Phycosiphon ichsp. overprinted by G. comosa (2, white doted line; bilobate crest of Gyrochorte ichsp. not clearly developed while bioturbated); G. comosa showing transition to Gyrochorte variabilis Fürsich, Alberti, and Pandey, 2017 expressed by fan-like appearance (shift of causative tube marked by black arrow). B. Gyrochorte comosa associated with Ptychoplasma ichsp. (P); sequorichnial behaviour of several Gyrochorte ichsp. producers is evidenced by parallel and/or overlapping traces (parallel traces, white doted lines; diverging/converging traces, white arrows). C. Parallel Gyrochorte comosa showing sequorichial behaviour (white arrows) associated with bivalve trace Siphonichnus ichsp. (b) (surrounded by black doted line) and cross-section of Lockeia ichsp. (surrounded by white doted line); G. comosa showing transition to G. variabilis expressed by fan-like appearance (shift of causative tube marked by black arrow). All specimens left in the field.
Fig. 4 in Gyrochorte "highways" and their environmental significance in shallow-marine sediments
Fig. 4. Different ichnospecies of Gyrochorte encountered in the Mulichinco Formation, Lower Cretaceous, Puerto Curaco, Neuquén Province, Argentina field photographs). A. Two parallel Gyrochorte comosa Heer, 1865 (black arrows, lower left), one continuing as such (black arrow, upper right), and one diverging from parallel course and becoming Gyrochorte variabilis Fürsich, Alberti, and Pandey, 2017 (shift of causative tube indicated by white arrow). B. Gyrochorte variabilis exhibiting circular, slightly bilobate pads (black arrows). C. Gyrochorte variabilis composed of elongate pads (black arrow) becoming oblique with slight zigzag pattern (white arrow). For details about G. variabilis see Fürsich et al. (2017). All specimens left in the field.
Fig. 3. Trace fossil Gyrochorte comosa Heer, 1865 in Gyrochorte "highways" and their environmental significance in shallow-marine sediments
Fig. 3. Trace fossil Gyrochorte comosa Heer, 1865 on bed surfaces structured by wave ripples; Mulichinco Formation, Lower Cretaceous, Puerto Curaco, Neuquén Province, Argentina (field photographs). A. Gyrochorte comosa on bed surface exhibiting parallel-crested, symmetric ripples. B. Parallelcrested, slightly asymmetric ripples traversed by G. comosa being more frequent at the stoss-side and the crest of the ripples. C. Bed surface structured by interfering symmetric ripples documenting sequorichnial behaviour of G. comosa producers (black arrows, "converging" traces; white arrows, "diverging" traces); note acute angle between diverging or converging traces. D. Bed surface exhibiting parallel-crested, slightly asymmetric ripples; G. comosa is overtopped by sand at the lee side of the ripples (white arrows). All specimens left in the field.
Fig. 1 in Gyrochorte "highways" and their environmental significance in shallow-marine sediments
Fig. 1. Location map (based on Schwarz 2012), asterisk marks the study area within the Neuquén Basin (highlighted) while the inset refers to the location of the detailed map within South America.
Fig. 7 in Gyrochorte "highways" and their environmental significance in shallow-marine sediments
Fig. 7. "Burrowing highways" of Gyrochorte comosa Heer, 1865 in the Mulichinco Formation, Lower Cretaceous, Puerto Curaco, Neuquén Province, Argentina (field photographs). Crowded parallel and overlapping G. comosa concentrated at ripple crest (A–E). Note acute angle between sequorichnial Gyrochorte ichsp. (arrows, traces converging to and diverging from a parallel course; doted lines, parallel/overlapping traces). All specimens left in the field.
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Allen Brain Atlas
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