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dc.contributor.authorWiddicombe, S.
dc.contributor.authorBeesley, A.
dc.contributor.authorBerge, J.A.
dc.contributor.authorDashfield, S.L.
dc.contributor.authorMcNeill, C.L.
dc.contributor.authorNeedham, Hazel Rosemary
dc.contributor.authorØxnevad, S.
dc.date.accessioned2013-01-15T23:03:47Z
dc.date.available2013-01-15T23:03:47Z
dc.date.copyright2012-12
dc.date.issued2012
dc.identifier.citationWiddicombe, S., Beesley, A., Berge, J. A., Dashfield, S. L., McNeill, C. L., Needham, H. R., & Øxnevad, S. (2012). Impact of elevated levels of CO2 on animal mediated ecosystem function: The modification of sediment nutrient fluxes by burrowing urchins. Marine Pollution Bulletin.en_NZ
dc.identifier.issn0025-326X
dc.identifier.urihttps://hdl.handle.net/10289/7064
dc.description.abstractA mesocosm experiment was conducted to quantify the relationships between the presence and body size of two burrowing heart urchins (Brissopsis lyrifera and Echinocardium cordatum) and rates of sediment nutrient flux. Furthermore, the impact of seawater acidification on these relationships was determined during this 40-day exposure experiment. Using carbon dioxide (CO ₂) gas, seawater was acidified to pH NBS 7.6, 7.2 or 6.8. Control treatments were maintained in natural seawater (pH ≈ 8.0). Under normocapnic conditions, burrowing urchins were seen to reduce the sediment uptake of nitrite or nitrate whilst enhancing the release of silicate and phosphate. In acidified (hypercapnic) treatments, the biological control of biogeochemical cycles by urchins was significantly affected, probably through the combined impacts of high CO ₂ on nitrifying bacteria, benthic algae and urchin behaviour. This study highlights the importance of considering biological interactions when predicting the consequences of seawater acidification on ecosystem function.en_NZ
dc.language.isoen
dc.publisherElsevieren_NZ
dc.relation.ispartofMarine Pollution Bulletin
dc.subjectBioturbationen_NZ
dc.subjectCarbon capture and storageen_NZ
dc.subjectEcosystem functionen_NZ
dc.subjectNutrient cyclingen_NZ
dc.subjectOcean acidificationen_NZ
dc.titleImpact of elevated levels of CO2 on animal mediated ecosystem function: The modification of sediment nutrient fluxes by burrowing urchinsen_NZ
dc.typeJournal Articleen_NZ
dc.identifier.doi10.1016/j.marpolbul.2012.11.008en_NZ


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