Curtin University Homepage
  • Library
  • Help
    • Admin

    espace - Curtin’s institutional repository

    JavaScript is disabled for your browser. Some features of this site may not work without it.
    View Item 
    • espace Home
    • espace
    • Curtin Research Publications
    • View Item
    • espace Home
    • espace
    • Curtin Research Publications
    • View Item

    Environmental variations in a semi-enclosed embayment (Amvrakikos Gulf, Greece) – reconstructions based on benthic foraminifera abundance and lipid biomarker pattern

    Access Status
    Open access via publisher
    Authors
    Naeher, Sebastian
    Geraga, M.
    Papatheodorou, G.
    Ferentinos, G.
    Kaberi, H.
    Schubert, C.
    Date
    2012
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Naeher, S. and Geraga, M. and Papatheodorou, G. and Ferentinos, G. and Kaberi, H. and Schubert, C. 2012. Environmental variations in a semi-enclosed embayment (Amvrakikos Gulf, Greece) – reconstructions based on benthic foraminifera abundance and lipid biomarker pattern. Biogeosciences. 9: pp. 5081-5094.
    Source Title
    Biogeosciences
    DOI
    10.5194/bg-9-5081-2012
    ISSN
    1726-4170
    URI
    http://hdl.handle.net/20.500.11937/5623
    Collection
    • Curtin Research Publications
    Abstract

    The evolution of environmental changes during the last decades and the impact on the living biomass in the western part of Amvrakikos Gulf was investigated using abundances and species distributions of benthic foraminifera and lipid biomarker concentrations. These proxies indicated that the gulf has markedly changed due to eutrophication. Eutrophication has led to a higher productivity, a higher bacterial biomass, shifts towards opportunistic and tolerant benthic foraminifera species (e.g. Bulimina elongata, Nonionella turgida, Textularia agglutinans, Ammonia tepida) and a lower benthic species density. Close to the Preveza Strait (connection between the gulf and the Ionian Sea), the benthic assemblages were more diversified under more oxygenated conditions. Sea grass meadows largely contributed to the organic matter at this sampling site. The occurrence of isorenieratane, chlorobactane and lycopane supported by oxygen monitoring data indicated that anoxic (and partly euxinic) conditions prevailed seasonally throughout the western part of the gulf with more severe oxygen depletion towards the east. Increased surface water temperatures have led to a higher stratification, which reduced oxygen resupply to bottom waters. Altogether, these developments led to mass mortality events and ecosystem decline in Amvrakikos Gulf.

    Related items

    Showing items related by title, author, creator and subject.

    • Investigating hypoxia in aquatic environments: Diverse approaches to addressing a complex phenomenon
      Friedrich, J.; Janssen, F.; Aleynik, D.; Bange, H.; Boltacheva, N.; Cagatay, M.; Dale, A.; Etiope, G.; Erdem, Z.; Geraga, M.; Gilli, A.; Gomoiu, M.; Hall, P.; Hansson, D.; He, Y.; Holtappels, M.; Kirf, M.; Kononets, M.; Konovalov, S.; Lichtschlag, A.; Livingstone, D.; Marinaro, G.; Mazlumyan, S.; Naeher, Sebastian; North, R.; Papatheodorou, G.; Pfannkuche, O.; Prien, R.; Rehder, G.; Schubert, C.; Soltwedel, T.; Sommer, S.; Stahl, H.; Stanev, E.; Teaca, A.; Tengberg, A.; Waldmann, C.; Wehrli, B.; Wenzhöfer, F. (2014)
      In this paper we provide an overview of new knowledge on oxygen depletion (hypoxia) and related phenomena in aquatic systems resulting from the EU-FP7 project HYPOX ("In situ monitoring of oxygen depletion in hypoxic ...
    • Deoxygenation following coral spawning and low-level thermal stress trigger mass coral mortality at Coral Bay, Ningaloo Reef
      Richards, Zoe ; Haines, Lewis; Ross, Claire; Preston, Sophie; Matthews, Troy; Terraica, Anthony; Black, Ethan; Lewis, Yvette; Mannolini, Josh; Dean, Patrick; Middleton, Vincent; Saunders, Ben (2024)
      Oxygen depletion is well recognized for its role in the degradation of tropical coral reefs. Extreme acute hypoxic events that lead to localized mass mortality and the formation of ‘dead zones’ (a region where few or no ...
    • Palaeoecological aspects of the diversification of echinoderms in the lower Ordovician of Central Anti-Atlas, Morocco
      Lefebvre, B.; Allaire, N.; Guensburg, T.; Hunter, Aaron; Kouraïss, K.; Martin, E.; Nardin, E.; Noailles, F.; Pittet, B.; Sumrall, C.; Zamora, S. (2016)
      Echinoderms are one of the major components of benthic faunas in the Lower Ordovician sequence near Zagora, central Anti-Atlas, Morocco. The Fezouata Shale (Tremadocian–late Floian) has yielded numerous, exquisitely ...
    Advanced search

    Browse

    Communities & CollectionsIssue DateAuthorTitleSubjectDocument TypeThis CollectionIssue DateAuthorTitleSubjectDocument Type

    My Account

    Admin

    Statistics

    Most Popular ItemsStatistics by CountryMost Popular Authors

    Follow Curtin

    • 
    • 
    • 
    • 
    • 

    CRICOS Provider Code: 00301JABN: 99 143 842 569TEQSA: PRV12158

    Copyright | Disclaimer | Privacy statement | Accessibility

    Curtin would like to pay respect to the Aboriginal and Torres Strait Islander members of our community by acknowledging the traditional owners of the land on which the Perth campus is located, the Whadjuk people of the Nyungar Nation; and on our Kalgoorlie campus, the Wongutha people of the North-Eastern Goldfields.