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  1. Article ; Online: Do solar cycles explain the emergence of COVID-19? Neutron count comparison between the solar minima of 2008-2009 and 2019-2020.

    Bell, Tomoko

    Current opinion in environmental science & health

    2022  Volume 26, Page(s) 100333

    Abstract: Cosmic rays are believed to be mutagenic and can stimulate virus mutation through point mutations. Neutron count on Earth ground stations is a reliable proxy to quantify cosmic ray flux. A previous study reported that the maximum flux of cosmic rays in ... ...

    Abstract Cosmic rays are believed to be mutagenic and can stimulate virus mutation through point mutations. Neutron count on Earth ground stations is a reliable proxy to quantify cosmic ray flux. A previous study reported that the maximum flux of cosmic rays in November 2019 could be related to the emergence of COVID-19 (late November to early December). Using the latest neutron count data, this study investigated if the data from 2019 to 2020 could specifically explain the emergence of pandemic (COVID-19). The results indicate that there is no significant difference between the previous two last solar minima datasets (2008-2009 and 2019-2020;
    Language English
    Publishing date 2022-01-25
    Publishing country Netherlands
    Document type Journal Article ; Review
    ISSN 2468-5844
    ISSN (online) 2468-5844
    DOI 10.1016/j.coesh.2022.100333
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: Do solar cycles explain the emergence of COVID-19? Neutron count comparison between the solar minima of 2008–2009 and 2019–2020

    Bell, Tomoko

    Current opinion in environmental science & health. 2022 Apr., v. 26

    2022  

    Abstract: Cosmic rays are believed to be mutagenic and can stimulate virus mutation through point mutations. Neutron count on Earth ground stations is a reliable proxy to quantify cosmic ray flux. A previous study reported that the maximum flux of cosmic rays in ... ...

    Abstract Cosmic rays are believed to be mutagenic and can stimulate virus mutation through point mutations. Neutron count on Earth ground stations is a reliable proxy to quantify cosmic ray flux. A previous study reported that the maximum flux of cosmic rays in November 2019 could be related to the emergence of COVID-19 (late November to early December). Using the latest neutron count data, this study investigated if the data from 2019 to 2020 could specifically explain the emergence of pandemic (COVID-19). The results indicate that there is no significant difference between the previous two last solar minima datasets (2008–2009 and 2019–2020; n = 24, p = 0.60). This suggests that the solar minima of 2019–2020 did not experience an increase in cosmic rays and the emergence of COVID-19 could not be solely explained by cosmic ray flux caused by solar cycles (space weather change).
    Keywords COVID-19 infection ; data collection ; environmental science ; mutagens ; neutrons ; pandemic ; viruses ; weather
    Language English
    Dates of publication 2022-04
    Publishing place Elsevier B.V.
    Document type Article
    ISSN 2468-5844
    DOI 10.1016/j.coesh.2022.100333
    Database NAL-Catalogue (AGRICOLA)

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  3. Article ; Online: Whole transcriptome analysis of demersal fish eggs reveals complex responses to ocean deoxygenation and acidification.

    Iguchi, Akira / Hayashi, Masahiro / Yorifuji, Makiko / Nishijima, Miyuki / Gibu, Kodai / Kunishima, Taiga / Bell, Tomoko / Suzuki, Atsushi / Ono, Tsuneo

    The Science of the total environment

    2024  Volume 917, Page(s) 169484

    Abstract: Ocean acidification and deoxygenation co-occur in marine environments, causing deterioration of marine ecosystems. However, effects of compound stresses on marine organisms and their physiological coping mechanisms are largely unknown. Here, we show how ... ...

    Abstract Ocean acidification and deoxygenation co-occur in marine environments, causing deterioration of marine ecosystems. However, effects of compound stresses on marine organisms and their physiological coping mechanisms are largely unknown. Here, we show how high pCO
    MeSH term(s) Animals ; Seawater ; Hydrogen-Ion Concentration ; Ecosystem ; Fishes/metabolism ; Aquatic Organisms/metabolism ; Gene Expression Profiling ; Oxygen/metabolism ; Carbon Dioxide/analysis ; Climate Change ; Oceans and Seas
    Chemical Substances Oxygen (S88TT14065) ; Carbon Dioxide (142M471B3J)
    Language English
    Publishing date 2024-01-31
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 121506-1
    ISSN 1879-1026 ; 0048-9697
    ISSN (online) 1879-1026
    ISSN 0048-9697
    DOI 10.1016/j.scitotenv.2023.169484
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.A 949: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
    Jg. 1995 - 2021: Lesesall (1.OG)
    ab Jg. 2022: Lesesaal (EG)

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  4. Article ; Online: Calcification rates of a massive and a branching coral species were unrelated to diversity of endosymbiotic dinoflagellates

    Gibu, Kodai / Ikeuchi, Eri / Bell, Tomoko / Nakamura, Takashi / Yoshioka, Yuki / Suzuki, Atsushi / Iguchi, Akira

    Mol Biol Rep. 2022 Sept., v. 49, no. 9 p.9101-9106

    2022  

    Abstract: BACKGROUND: To explore the possibility that endosymbiotic dinoflagellates (Symbiodiniaceae) are associated with coral calcification rates, we investigated the diversity of symbiotic algae in coral colonies with different calcification rates within ... ...

    Abstract BACKGROUND: To explore the possibility that endosymbiotic dinoflagellates (Symbiodiniaceae) are associated with coral calcification rates, we investigated the diversity of symbiotic algae in coral colonies with different calcification rates within massive and branching corals (Porites australiensis and Acropora digitifera). METHODS AND RESULTS: Genotyping symbiotic algae from colonies with different calcification rates revealed that all the colonies of both species harbored mainly Cladocopium (previously clade C of Symbiodinium). The Cladocopium symbionts in P. australiensis were mainly composed of C15 and C15bn, and those in A. digitifera of C50a and C50c. We did not detect clear relationships between symbiont compositions and calcification rates within the two coral species. CONCLUSIONS: Our results suggest that different coral calcification rates within species may be attributed to genetic factors of coral hosts themselves and/or within symbiont genotypes.
    Keywords Acropora ; Symbiodinium ; calcification ; corals ; genotyping ; symbionts
    Language English
    Dates of publication 2022-09
    Size p. 9101-9106.
    Publishing place Springer Netherlands
    Document type Article ; Online
    ZDB-ID 186544-4
    ISSN 1573-4978 ; 0301-4851
    ISSN (online) 1573-4978
    ISSN 0301-4851
    DOI 10.1007/s11033-022-07702-9
    Database NAL-Catalogue (AGRICOLA)

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    In stock of ZB MED Bonn / Germany

    Z 78/728: Show issues

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  5. Article ; Online: Calcification rates of a massive and a branching coral species were unrelated to diversity of endosymbiotic dinoflagellates.

    Gibu, Kodai / Ikeuchi, Eri / Bell, Tomoko / Nakamura, Takashi / Yoshioka, Yuki / Suzuki, Atsushi / Iguchi, Akira

    Molecular biology reports

    2022  Volume 49, Issue 9, Page(s) 9101–9106

    Abstract: Background: To explore the possibility that endosymbiotic dinoflagellates (Symbiodiniaceae) are associated with coral calcification rates, we investigated the diversity of symbiotic algae in coral colonies with different calcification rates within ... ...

    Abstract Background: To explore the possibility that endosymbiotic dinoflagellates (Symbiodiniaceae) are associated with coral calcification rates, we investigated the diversity of symbiotic algae in coral colonies with different calcification rates within massive and branching corals (Porites australiensis and Acropora digitifera).
    Methods and results: Genotyping symbiotic algae from colonies with different calcification rates revealed that all the colonies of both species harbored mainly Cladocopium (previously clade C of Symbiodinium). The Cladocopium symbionts in P. australiensis were mainly composed of C15 and C15bn, and those in A. digitifera of C50a and C50c. We did not detect clear relationships between symbiont compositions and calcification rates within the two coral species.
    Conclusions: Our results suggest that different coral calcification rates within species may be attributed to genetic factors of coral hosts themselves and/or within symbiont genotypes.
    MeSH term(s) Animals ; Anthozoa/genetics ; Dinoflagellida/genetics ; Symbiosis
    Language English
    Publishing date 2022-06-23
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 186544-4
    ISSN 1573-4978 ; 0301-4851
    ISSN (online) 1573-4978
    ISSN 0301-4851
    DOI 10.1007/s11033-022-07702-9
    Database MEDical Literature Analysis and Retrieval System OnLINE

    Full text online

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    In stock of ZB MED Cologne/Königswinter

    Zs.A 1140: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
    Jg. 1995 - 2021: Lesesall (1.OG)
    ab Jg. 2022: Lesesaal (EG)

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  6. Article: Temperature-controlled culture experiments with primary polyps of coral Acropora digitifera: Calcification rate variations and skeletal Sr/Ca, Mg/Ca, and Na/Ca ratios

    Bell, Tomoko / Akira Iguchi / Atsushi Suzuki / Kazuhiko Sakai / Kei Ishikawa / Kozue Nishida / Takashi Nakamura / Yoshikazu Ohno / Yusuke Yokoyama

    Palaeogeography, palaeoclimatology, palaeoecology. 2017 Oct. 15, v. 484

    2017  

    Abstract: Coral skeletons preserve useful archival indicators from which to reconstruct past environments. We conducted temperature-controlled culture experiments (20, 22, 27, and 31°C) with primary polyps of Acropora digitifera to accurately assess the impact of ... ...

    Abstract Coral skeletons preserve useful archival indicators from which to reconstruct past environments. We conducted temperature-controlled culture experiments (20, 22, 27, and 31°C) with primary polyps of Acropora digitifera to accurately assess the impact of a wide range of temperatures on the calcification rate and to methodically evaluate the skeletal trace elements (Sr/Ca, Mg/Ca, and Na/Ca ratios). Water temperatures positively affected the calcification rate up to 31°C, which exceeds the temperature threshold for this species. The calcification rates also varied widely (>20%) during each of the four temperature treatments. The skeletal Sr/Ca ratio was most strongly correlated with water temperature (R2=0.68, p<0.001), whereas the Mg/Ca and Na/Ca ratios showed lower correlations (R2=0.53, p<0.001; R2=0.34, p=0.011, respectively). The variations in the skeletal Sr/Ca, Mg/Ca, and Na/Ca ratios at the four different temperatures were 0.36%–1.20%, 0.83%–3.76%, and 0.52%–3.24%, respectively. Thus, the Sr/Ca ratio showed the least variation, despite the wide variations in the calcification rate. We confirm that the Sr/Ca ratio of A. digitifera juveniles is a robust proxy of temperature, regardless of variations in the calcification rate and the wide range of ambient temperatures. In addition, our results regarding skeletal Mg/Ca and Na/Ca ratios further our understanding of coral calcification processes.
    Keywords Acropora ; ambient temperature ; calcification ; calcium ; corals ; juveniles ; magnesium ; sodium ; strontium ; water temperature
    Language English
    Dates of publication 2017-1015
    Size p. 129-135.
    Publishing place Elsevier B.V.
    Document type Article
    ZDB-ID 417718-6
    ISSN 0031-0182
    ISSN 0031-0182
    DOI 10.1016/j.palaeo.2017.03.016
    Database NAL-Catalogue (AGRICOLA)

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    In stock of ZB MED Bonn / Germany

    Z 67/162: Show issues

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