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phytoplankton

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Journal Article
Published: 01 December 2024
Russ. Geol. Geophys. (2024) 65 (12): 1446–1467.
...), the main form for occurrence of almost all elements is the residual, terrigenous form. Lake Kotokel belongs to the production-phytoplankton type of lake ecosystems ( Pronin and Ubugunov, 2013 ; Leonova et al., 2019 ). The main producer of autochthonous organic matter (OM) of the lake bottom sediments...
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Journal Article
Published: 01 June 2024
Jour. Geol. Soc. India (2024) 100 (6): 800–806.
... in the world. The primary production rate of macroalgae and sea grasses in the lagoon of Kavaratti Island is considerably greater than that of phytoplankton ( Dhargalkar and Shaikh, 2000 ). Significant seasonal variations in the chemical composition and physical environment of the Lakshadweep Sea generally...
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Journal Article
Journal: Geology
Published: 29 November 2023
Geology (2024) 52 (2): 120–124.
...-rich units. We examined organic matter at the Waiheke, New Zealand, section, and results show that these deposits are dominated by lamalginites composed of unicellar solitary or colonial phytoplankton produced during algal blooms that falls as “marine snow.” We modeled the impact of ash fall from...
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Journal Article
Journal: Elements
Published: 01 February 2022
Elements (2022) 18 (1): 27–33.
... species, including the longer-lived methyl halides and the halogenated VSLSs ( F ig . 1 ). For the methyl halides CH 3 Br and CH 3 Cl, biogenic processes in phytoplankton species are believed to be the primary source, tropical phytoplankton species having faster production rates than temperate species...
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Journal Article
Published: 01 January 2022
Jour. Geol. Soc. India (2022) 98 (1): 113–124.
... boundary and those which suffered crisis and extinction at this boundary comprise large Baltisphaeridium, Ordovicidium, Orthosphaeridium, Peteino-sphaeridium, and Villosacopsula . There is a record of a major turnover during the early Hirnantian with phytoplankton with the appearance of several new...
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Journal Article
Published: 12 November 2021
Geological Magazine (2022) 159 (7): 1071–1092.
... (Pehr et al . 2018 ). Prasinophytes are generally successful in low diversities of other phytoplankton taxa and in an aftermath of crises, which labels them disaster-taxa (e.g. van de Schootbrugge et al . 2007 ). A community of such disaster-taxa and potential mixotrophs (flask-shaped microfossils...
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Series: Geological Society, London, Special Publications
Published: 03 November 2021
DOI: 10.1144/SP514-2020-167
EISBN: 9781786209993
... components that present no structure at the scale of light microscopy (sometimes with structured inclusions), including phytoplankton or bacterial-derived amorphous organic matter (AOM), higher plant resins, and amorphous products resulting from the diagenesis of macrophyte tissues. Over the years several...
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Series: Geological Society, London, Special Publications
Published: 21 September 2021
DOI: 10.1144/SP511-2020-55
EISBN: 9781786209986
... groups of primarily (although not exclusively) phytoplanktonic micro-organisms: the Dinoflagellata, Acritarcha and a smaller group, the Prasinophyta. The dinoflagellate NPP are well known, as shown in the following ‘Dinoflagellates’ subsection. The acritarchs are a less well-defined and heterogeneous...
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Series: GSA Special Papers
Published: 12 August 2021
DOI: 10.1130/2018.2536(01)
EISBN: 9780813795362
..., in the form of greater amounts of green algae and greater percentages of diatom phytoplankton, indicate increased levels of lake primary productivity in response to warming. Principal component analysis (PCA) distinctly resolves the Pleistocene from the Holocene diatom flora. The Pleistocene flora...
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Journal Article
Journal: Geology
Published: 17 January 2020
Geology (2020) 48 (4): 328–332.
... and Bercovici, 2014 ; Brugger et al., 2017 ). A collapse in phytoplankton productivity in the world’s oceans ( Hsü et al., 1982 ; Zachos and Arthur, 1986 ; Sepúlveda et al., 2009 ) occurred due to the sudden decline in photosynthesis as atmospheric particulates lowered light levels for years after the impact...
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Journal Article
Published: 13 December 2019
Journal of the Geological Society (2020) 177 (2): 315–324.
... (chitinozoans) and marine phytoplankton (acritarchs and prasinophytes) all show significant endemism. They are depauperate in some respects, missing common species found elsewhere, but also containing many endemic taxa. Measures of similarity and cluster analysis reveal little relatedness to other contemporary...
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Journal Article
Published: 07 January 2019
Geological Magazine (2020) 157 (6): 1012–1021.
... of enhanced terrestrial aridity in the Himalayan foreland. The three-end-member simple mixing model, estimating the relative contributions of SOM from terrestrial C3 and C4 plants and marine phytoplankton, supports our interpretation of the distribution of C3 and C4 land plants in the terrestrial catchment...
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Journal Article
Journal: Elements
Published: 01 December 2018
Elements (2018) 14 (6): 367.
...(II) is oxidised, thereby increasing irons' overall solubility. But conversely, increasing ocean stratification will reduce the upwelling flux of iron into the sunlit zone where most organisms live, resulting in less iron-fueled phytoplankton growth. By turning knobs in multiple ways on this delicate...
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Journal Article
Journal: Elements
Published: 01 December 2018
Elements (2018) 14 (6): 385–390.
...Maeve C. Lohan; Alessandro Tagliabue Trace metals are essential for life in the oceans but are present in extremely low concentrations. The availability of trace elements in surface waters frequently regulates the growth of microscopic marine plants called phytoplankton. As phytoplankton...
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Journal Article
Published: 12 July 2018
Journal of the Geological Society (2018) 175 (5): 716–720.
... phosphorus limitation during the Proterozoic (e.g. Reinhard et al. 2017 ). Autotrophic aquatic biomass may have been smaller before eukaryotic phytoplankton rose to dominance ( Falkowski et al. 2004 ), and heterotrophic aquatic biomass (today twice as large as autotrophic biomass) would have been much...
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Journal Article
Published: 01 July 2018
Russ. Geol. Geophys. (2018) 59 (7): 864–890.
... of phytoplankton significantly increased, indicating the onset of transgression, which affected largely coastal landscapes and type of vegetation: The forests dominated by conifers were gradually succeeded by forests mostly composed of Ginkgoaceae. The lower part of the section about 2.5 m thick (beds 1–4...
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Journal Article
Journal: Geology
Published: 15 February 2018
Geology (2018) 46 (4): 307–310.
.... In particular, high-nutrient, low-chlorophyll (HNLC) areas where phytoplankton growth is critically iron-limited, such as the subarctic Pacific Ocean and the Southern Ocean, are proposed to respond to increases in bioavailable Fe supply with enhanced phytoplankton productivity and carbon export to the seafloor...
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Journal Article
Journal: GSA Bulletin
Published: 20 December 2017
GSA Bulletin (2018) 130 (5-6): 941–951.
.... However, oxygen-producing phytoplankton may have also been capable of supplying the necessary oxidizing power. Here, we revisit the question of the anoxygenic and oxygenic phytoplankton populations necessary to account for banded iron formation deposition and quantify the amount of selected trace elements...
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Journal Article
Published: 10 November 2017
Bulletin de la Société Géologique de France (2017) 188 (5): 29.
..., whereas the oil-shales were dominated either by a mixing of terrestrial particles and lacustrine phytoplanktonic/bacterial organic matter (OM), or by a lacustrine OM that suffered biodegradation within the water column. During the Autunian, an increasing trend of degraded lacustrine OM concentration...
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Journal Article
Published: 01 February 2016
Russ. Geol. Geophys. (2016) 57 (2): 316–328.
... (climatic changes, endogenous methane) factors on the hydrochemical composition and phytoplankton of mountain lakes in East Siberia for the last 210 years. The lacustrine diatom community responded to the intense acid precipitation that led to the acidification of lakes in Europe and North America in 1950...
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