Skip to content

Research at St Andrews

Morphological abnormalities of planktonic foraminiferal tests in the SW pacific ocean over the last 550ky

Research output: Contribution to journalArticle

Author(s)

Nicoletta Mancin, Kate Darling

Abstract

The paper focuses on the occurrence of morphologically abnormal specimens of planktonic foraminifera observed over the last 550ky in IMAGES core MD 97-2114 (East of New Zealand, SW Pacific). Abnormal tests occurred throughout the entire record in all the morphospecies characterising the assemblages but were relatively rare, with percentages not exceeding 1.5% of the total assemblage. No mass abnormality events were found. A range of malformations were observed from slight deformity with smaller or overdeveloped chambers to more severe deformity, with misplaced chambers, distorted spirals or double tests forming twinned individuals. They exhibited several different categories of morphological abnormalities, even within the same sample. Test abnormalities were most abundant in the morphospecies Globorotalia inflata, Globigerina bulloides and Orbulina universa and were characterised by a long-term decreasing trend up core with an alternating % abundance pattern at the glacial to interglacial scale between MIS 14 to MIS 8, recording the highest percentages during the interglacials. Normalised total abundance and abnormal abundance curves co-varied very closely for G. bulloides and O. universa, but for G. inflata two opposing excursions were observed during MIS 13 and 6 which may be linked to water column states. Although abnormal numbers were proportionately low, there appears to be a “natural” background number of malformations in the G. inflata population through time. There was no relationship between volcanic ash production and test abnormalities.
Close

Details

Original languageEnglish
Pages (from-to)1-19
JournalMarine Micropaleontology
Volume120
Early online date5 Sep 2015
DOIs
Publication statusPublished - 15 Oct 2015

    Research areas

  • Planktonic foraminifera, Abnormal test, Environmental stressors, Pleistocene, SW pacific

Discover related content
Find related publications, people, projects and more using interactive charts.

View graph of relations

Related by author

  1. Genetic and morphological divergence in the warm-water planktonic foraminifera genus Globigerinoides

    Morard, R., Füllberg, A., Brummer, G-J. A., Greco, M., Jonkers, L., Wizemann, A., Weiner, A. K. M., Darling, K., Siccha, M., Ledevin, R., Kitazato, H., de Garidel-Thoron, T., de Vargas, C. & Kucera, M., 5 Dec 2019, In : PLoS ONE. 14, 12, 30 p., e0225246.

    Research output: Contribution to journalArticle

  2. History of the introduction of a species resembling the benthic foraminifera Nonionella stella in the oslofjord (Norway): morphological, molecular and paleo-ecological evidences

    Deldicq, N., Alve, E., Schweizer, M., Asteman, I. P., Hess, S., Darling, K. & Bouchet, V. M. P., Jun 2019, In : Aquatic Invasions. 14, 2, p. 182-205 24 p.

    Research output: Contribution to journalArticle

  3. The genetic diversity, morphology, biogeography, and taxonomic designations of Ammonia (Foraminifera) in the Northeast Atlantic

    Bird, C., Schweizer, M., Roberts, A., Austin, W. E. N., Knudsen, K. L., Evans, K. M., Filipsson, H. L., Sayer, M. D. J., Geslin, E. & Darling, K. F., 19 Feb 2019, In : Marine Micropaleontology.

    Research output: Contribution to journalArticle

  4. Assessing proxy signatures of temperature, salinity, and hypoxia in the Baltic Sea through foraminifera-based geochemistry and faunal assemblages

    Groeneveld, J., Filipsson, H. L., Austin, W. E. N., Darling, K., McCarthy, D., Krupinski, N. B. Q., Bird, C. & Schweizer, M., 7 Sep 2018, In : Journal of Micropalaeontology. 37, 2, p. 403-429 27 p.

    Research output: Contribution to journalArticle

  5. Distribution and ecology of planktic foraminifera in the North Pacific: implications for paleo-reconstructions

    Taylor, B. J., Rae, J. W. B., Gray, W. R., Darling, K., Burke, A., Gersonde, R., Abelmann, A., Maier, E., Esper, O. & Ziveri, P., 1 Jul 2018, In : Quaternary Science Reviews. 191, p. 256-274 19 p.

    Research output: Contribution to journalArticle

Related by journal

  1. The genetic diversity, morphology, biogeography, and taxonomic designations of Ammonia (Foraminifera) in the Northeast Atlantic

    Bird, C., Schweizer, M., Roberts, A., Austin, W. E. N., Knudsen, K. L., Evans, K. M., Filipsson, H. L., Sayer, M. D. J., Geslin, E. & Darling, K. F., 19 Feb 2019, In : Marine Micropaleontology.

    Research output: Contribution to journalArticle

  2. Genetic diversity and ecology of the planktonic foraminifers Globigerina bulloides, Turborotalita quinqueloba and Neogloboquadrina pachyderma off the Oman margin during the late SW Monsoon

    Darling, K. F., Wade, C. M., Siccha, M., Trommer, G., Schulz, H., Abdolalipour, S. & Kurasawa, A., Dec 2017, In : Marine Micropaleontology. 137, p. 64-77

    Research output: Contribution to journalArticle

  3. Morphological response of planktic foraminifers to habitat modifications associated with the emergence of the Isthmus of Panama

    Schmidt, D., Caromel, A., Seki, O., Rae, J. W. B. & Renaud, S., Oct 2016, In : Marine Micropaleontology. 128, p. 28-38 11 p.

    Research output: Contribution to journalArticle

  4. The genetic diversity, phylogeography and morphology of Elphidiidae (Foraminifera) in the Northeast Atlantic

    Darling, K. F., Schweizer, M., Knudsen, K. L., Evans, K. M., Bird, C., Roberts, A., Filipsson, H. L., Kim, J-H., Gudmundsson, G., Wade, C. M., Sayer, M. D. J. & Austin, W. E. N., Dec 2016, In : Marine Micropaleontology. 129, p. 1-23 23 p.

    Research output: Contribution to journalArticle

  5. Genetic and morphometric evidence for parallel evolution of the Globigerinella calida morphotype

    Weiner, A. K. M., Weinkauf, M. F. G., Kurasawa, A., Darling, K. F. & Kucera, M., Jan 2015, In : Marine Micropaleontology. 114, p. 19-35 17 p.

    Research output: Contribution to journalArticle

ID: 215400794

Top