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Series: Geological Society, London, Special Publications
Published: 03 November 2021
DOI: 10.1144/SP514-2020-167
EISBN: 9781786209993
... organic matter (AOM), representing a proximal marine environment with emplacement of euxinic conditions at the top (total organic carbon/sulfur content and increase in AOM). At the base of the serpentinum Zone the proliferation of bacterial biomass begins, with phytoplankton playing a secondary role...
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Series: Geological Society, London, Special Publications
Published: 03 November 2021
DOI: 10.1144/SP514-2021-2
EISBN: 9781786209993
... A (darker colour→shale; lighter colour→limestone). On the right are T max and PI plots from Rock-Eval pyrolysis that indicate thermal maturity. Fig. 9. Indicators of redox conditions and biomass changes in core A, based on Rock-Eval, palynological and molecular biomarker study. Data represent...
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Journal Article
Published: 29 October 2021
Journal of Foraminiferal Research (2021) 51 (4): 249–266.
...Thaise Ricardo de Freitas; Eduardo Tadeu Bacalhau; Sibelle Trevisan Disaró ABSTRACT Foraminifers are widespread, highly abundant protists and active participants in marine carbon cycling. Their biomass might represent almost half of the total meiobenthic biomass in the deep sea. Foraminiferal...
Series: Geological Society, London, Special Publications
Published: 21 September 2021
DOI: 10.1144/SP511-2020-54
EISBN: 9781786209986
... improved our understanding of spore taphonomy, and the relationship between spore abundance and local livestock biomass and composition. Human impact inferred from palynological analysis is an important field of investigation among palaeoecological studies. Reconstructing and quantifying human...
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Series: GSA Special Papers
Published: 12 August 2021
DOI: 10.1130/2018.2536(02)
EISBN: 9780813795362
.... The vegetation history indicates a change from open subalpine forests to closed western hemlock and Douglas fir forests as climate moved from cold and dry full glacial to warm and wet Holocene conditions. The fire history indicates that although there was more biomass burned in the Holocene, the frequency...
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Journal Article
Journal: AAPG Bulletin
Published: 15 March 2021
AAPG Bulletin (2021) 105 (3): 543–573.
... and Marcellus Shales primarily was derived from marine algae and its degradation products, including bacterial biomass. Absence of odd-over-even n - alkane distributions (n - C 13 to n - C 21 range) in gas chromatograms and low gammacerane index values in Devonian source rocks are similar to those of Devonian...
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Journal Article
Published: 01 May 2020
American Mineralogist (2020) 105 (5): 609–615.
... by biology and have the ability to rapidly convert CO 2 to biomass and vice versa. For instance, carboxylation is a critical reaction in primary production and metabolic pathways like photosynthesis in which sunlight provides energy to drive carbon fixation, whereas decarboxylation is a critical reaction...
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Series: GSA Special Papers
Published: 06 March 2020
DOI: 10.1130/2020.2544(09)
EISBN: 9780813795447
... additional perturbations, these environmental disturbances led to a drastic decrease of the biomass of calcifying species and their biodiversity by ~80%, while the biodiversity of noncalcifying species was reduced by ~60%. We also suggest that the short-lived acidification caused by the Chicxulub impact...
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Journal Article
Journal: Palynology
Published: 02 January 2020
Palynology (2020) 44 (1): 114–126.
...Ujjwal Layek; Siddhartha S. Manna; Prakash Karmakar Abstract Pollen loads of Apis mellifera were analysed to assess their daily pollen collection, polleniferous flora and their pollen biomass contribution in southern West Bengal, India. After that, the pollen host selection and pollen foraging...
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Journal Article
Journal: Geology
Published: 30 August 2019
Geology (2019) 47 (10): 958–962.
... over a range of time scales (e.g., Cole et al., 2007 ; Galy et al., 2007 ). Transient storage of CO 2 sequestered via photosynthesis in soils and biomass (biospheric POC [POC bio ]) represents a short-term (<10 5 yr) carbon sink ( Berner, 1999 ). POC bio mobilized by and transported through...
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Journal Article
Published: 01 August 2019
Russ. Geol. Geophys. (2019) 60 (8): 926–937.
...) conducted under conditions typical of the hydrocarbon generation zone (80 °C, 5 MPa). The cultivation under conditions of biomass enrichment with the Baikal diatom Synedra acus changed the composition of organic matter. The transformation degree of organic matter in the sediment after the experiment was 16...
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Journal Article
Published: 01 July 2019
Journal of Foraminiferal Research (2019) 49 (3): 259–274.
... that underscore their value as ultra high resolution sea-level proxies. Mesocosm biomass and abundance counts show that foraminifera represent >50% of the meiofaunal biomass, emphasising their importance in the food web and energy-flow dynamics of temperate salt marsh systems. © 2019, The Cushman Foundation...
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Journal Article
Journal: AAPG Bulletin
Published: 15 May 2019
AAPG Bulletin (2019) 103 (5): 1071–1096.
... in the fluvial Saldanha Bay at the southwestern tip of Africa and that the increase in the total organic carbon ( TOC ) content of the rocks during the marine incursion implies a biomass buildup. In addition, there are also many modern analogs for this topic (e.g., the eastern Melville Island, western Canadian...
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Journal Article
Published: 01 May 2019
Environmental & Engineering Geoscience (2019) 25 (2): 103–114.
... and easily disintegrates, are a topic of concern for researchers. In this work, a biomass-based polymeric soil stabilizer (CXZ) was prepared using a “green” strategy with polymerization of carboxymethyl cellulose and xanthan gum. A direct shear test, unconfined compressive strength properties, water...
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Journal Article
Journal: Geology
Published: 22 March 2019
Geology (2019) 47 (5): 479–482.
.... The concentration of intracellular WEs in bacteria has been shown to arise particularly in situations of nutrient starvation, especially when nitrogen is limiting ( Ishige et al., 2003 ). Additionally, the recycling of archaeal biomass by archaea themselves was suggested to minimize the energy cost of life...
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Journal Article
Journal: Paleobiology
Published: 28 February 2019
Paleobiology (2019) 45 (2): 265–279.
... taphonomic and metabolic grounds. Aragonitic bivalves may be underrepresented in many fossil assemblages due to preferential dissolution. Abundance counts may further understate the ecological importance of bivalves, which tend to have more biomass and higher metabolic rates than brachiopods. We evaluate...
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Journal Article
Published: 07 January 2019
Geological Magazine (2020) 157 (6): 1012–1021.
... (∼8 to ∼7 Ma) might be due to a greater input of C3 terrestrial organic matter. The increase in δ 13 C SOM values at ∼7 Ma and the appearance of high δ 13 C SOM values ( c . −18.0 ‰) within Unit III-1 (∼7 to ∼2 Ma) indicate that C4 biomass overwhelmed the terrestrial catchment environment as a result...
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Journal Article
Published: 01 September 2018
European Journal of Mineralogy (2018) 30 (5): 957–966.
... analysis of the similarities between the two compounds has been performed. Finally, a comparison between the powder diffraction patterns of different A 2 Ca 6 Si 4 O 15 compounds is presented that may be helpful for the identification of these phases in residuals of biomass combustion. For the synthesis...
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Journal Article
Published: 12 July 2018
Journal of the Geological Society (2018) 175 (5): 716–720.
...Sean McMahon; John Parnell Abstract The subsurface ‘deep biosphere’ represents one-tenth to one-third of Earth's total global present-day biomass. The rest is dominated by land plants, a relatively recent development in geological history. Before c. 400 Ma, a relatively low surface biomass...
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Series: GSA Field Guides
Published: 29 March 2018
DOI: 10.1130/2018.0050(04)
EISBN: 9780813756509
... to an ecosystem. Hotspots are critical for providing limiting nutrients, including nitrogen and carbon, to be incorporated into soil microbial biomass and plant biomass. For vertebrate ­carcasses, following the release of labile compounds from soft tissues, bones are often left behind, and provide a more...
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