Seagrass ecosystem response to long-term high CO2 in a Mediterranean volcanic vent

E.T. Apostolaki, S. Vizzini, I.E. Hendriks, Ylva Olsen

    Research output: Contribution to journalArticle

    29 Citations (Scopus)

    Abstract

    We examined the long-term effect of naturally acidified water on a Cymodocea nodosa meadow growing at a shallow volcanic CO2 vent in Vulcano Island (Italy). Seagrass and adjacent unvegetated habitats growing at a low pH station (pH = 7.65 ± 0.02) were compared with corresponding habitats at a control station (pH = 8.01 ± 0.01). Density and biomass showed a clear decreasing trend at the low pH station and the below- to above-ground biomass ratio was more than 10 times lower compared to the control. C content and δ13C of leaves and epiphytes were significantly lower at the low pH station. Photosynthetic activity of C. nodosa was stimulated by low pH as seen by the significant increase in Chla content of leaves, maximum electron transport rate and compensation irradiance. Seagrass community metabolism was intense at the low pH station, with significantly higher net community production, respiration and gross primary production than the control community, whereas metabolism of the unvegetated community did not differ between stations. Productivity was promoted by the low pH, but this was not translated into biomass, probably due to nutrient limitation, grazing or poor environmental conditions. The results indicate that seagrass response in naturally acidified conditions is dependable upon species and geochemical characteristics of the site and highlight the need for a better understanding of complex interactions in these environments. © 2014 Elsevier Ltd.
    Original languageEnglish
    Pages (from-to)9-15
    JournalMarine Environmental Research
    Volume99
    DOIs
    Publication statusPublished - 2014

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    ecosystem response
    Vents
    seagrass
    Ecosystems
    Ecosystem
    Biomass
    Metabolism
    ecosystems
    Nutrients
    metabolism
    Productivity
    nutrient limitation
    biomass
    habitat
    aboveground biomass
    meadow
    irradiance
    station
    primary production
    Water

    Cite this

    Apostolaki, E.T. ; Vizzini, S. ; Hendriks, I.E. ; Olsen, Ylva. / Seagrass ecosystem response to long-term high CO2 in a Mediterranean volcanic vent. In: Marine Environmental Research. 2014 ; Vol. 99. pp. 9-15.
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    abstract = "We examined the long-term effect of naturally acidified water on a Cymodocea nodosa meadow growing at a shallow volcanic CO2 vent in Vulcano Island (Italy). Seagrass and adjacent unvegetated habitats growing at a low pH station (pH = 7.65 ± 0.02) were compared with corresponding habitats at a control station (pH = 8.01 ± 0.01). Density and biomass showed a clear decreasing trend at the low pH station and the below- to above-ground biomass ratio was more than 10 times lower compared to the control. C content and δ13C of leaves and epiphytes were significantly lower at the low pH station. Photosynthetic activity of C. nodosa was stimulated by low pH as seen by the significant increase in Chla content of leaves, maximum electron transport rate and compensation irradiance. Seagrass community metabolism was intense at the low pH station, with significantly higher net community production, respiration and gross primary production than the control community, whereas metabolism of the unvegetated community did not differ between stations. Productivity was promoted by the low pH, but this was not translated into biomass, probably due to nutrient limitation, grazing or poor environmental conditions. The results indicate that seagrass response in naturally acidified conditions is dependable upon species and geochemical characteristics of the site and highlight the need for a better understanding of complex interactions in these environments. {\circledC} 2014 Elsevier Ltd.",
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    Seagrass ecosystem response to long-term high CO2 in a Mediterranean volcanic vent. / Apostolaki, E.T.; Vizzini, S.; Hendriks, I.E.; Olsen, Ylva.

    In: Marine Environmental Research, Vol. 99, 2014, p. 9-15.

    Research output: Contribution to journalArticle

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