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Journal Article
Journal: Geology
Published: 17 November 2023
Geology (2024) 52 (1): 87–91.
... in the phosphorus (P) contents of SPGs. Collectively, these data are most parsimoniously explained by an absolute increase in biomass burial in the late Proterozoic or early Phanerozoic by a factor of ~5 and as much as 8. The Precambrian–Phanerozoic transition was a time of progressive oxygenation of surface...
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Journal Article
Journal: Geology
Published: 22 August 2023
Geology (2023) 51 (11): 1043–1047.
... of authigenic P phases can only be reproduced when C to P ratios in marine biomass are at least 500 (mol/mol), approximately five times higher than the values that characterize the modern ocean. This constraint indicates that Archean oceans were strongly nutrient-limited. * mojtaba.fakhraee@yale.edu...
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Journal Article
Journal: Elements
Published: 01 February 2023
Elements (2023) 19 (1): 30–36.
...Marianne Haines; Varada Khot; Marc Strous Alkaline soda lakes are known as some of nature’s most biologically productive ecosystems. Vigorous production (photosynthetic conversion of inorganic carbon into biomass) is countered by incremental biomass degradation, which fuels and feeds a diverse...
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Journal Article
Journal: PALAIOS
Published: 28 June 2022
PALAIOS (2022) 37 (6): 219–223.
..., tissue- and organ-grade multicellular organisms. Another clade of complex multicellular eukaryotes, the fungi, are frequently associated with vegetation and are also intimately linked with Earth's lithospheric and biospheric processes via the decay and breakdown of plant biomass, binding of soils...
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Series: GSA Special Papers
Published: 03 May 2022
DOI: 10.1130/2021.2553(26)
EISBN: 9780813795539
... remain uncertain. Some differences in chemical composition between moldavites and sediments of corresponding age from the surroundings of the Ries crater could be explained by a hypothesis according to which biomass covering the pre-impact area contributed to the source materials. In a comparison...
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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
Published: 01 January 2020
The Journal of Geology (2020) 128 (1): 95–107.
... YDB burning and its proposed age, identification, and context within the chronological record. Other issues include the association of biomass burning with impact-related proxies, megafaunal extinctions, and human population declines. Holliday and coauthors dispute whether impacts, in general, can...
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Journal Article
Published: 01 January 2020
The Journal of Geology (2020) 128 (1): 69–94.
... (Wolbach et al. 2018 a , p. 165). This purported event is claimed by the adherents of the YDIH to have brought on extraordinary environmental changes that “triggered an ‘impact winter’ and the subsequent YD climate episode, biomass burning, late Pleistocene megafaunal extinctions, and human cultural...
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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. * Correspondence author. E...
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Journal Article
Journal: AAPG Bulletin
Published: 15 May 2019
AAPG Bulletin (2019) 103 (5): 1071–1096.
... incursion during the terminal Oligocene–early Miocene 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...
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