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dc.contributor.authorZabarte-Maeztu, Iñigoen_NZ
dc.contributor.authorMatheson, Fleur E.en_NZ
dc.contributor.authorManley-Harris, Merilynen_NZ
dc.contributor.authorDavies-Colley, Robert J.en_NZ
dc.contributor.authorOliver, Meganen_NZ
dc.contributor.authorHawes, Ianen_NZ
dc.date.accessioned2020-10-20T20:10:15Z
dc.date.available2020-10-20T20:10:15Z
dc.date.issued2020en_NZ
dc.identifier.citationZabarte-Maeztu, I., Matheson, F. E., Manley-Harris, M., Davies-Colley, R. J., Oliver, M., & Hawes, I. (2020). Effects of fine sediment on seagrass meadows: A case study of Zostera muelleri in pāuatahanui inlet, New Zealand. Journal of Marine Science and Engineering, 8(9), 645. https://doi.org/10.3390/JMSE8090645en
dc.identifier.urihttps://hdl.handle.net/10289/13913
dc.description.abstractSeagrass meadows are vulnerable to fine sediment (mud) pollution, with impacts usually attributed to reduction in submerged light. Here we tested two non-exclusive hypotheses, that mud particles (≤63 μm) impact seagrasses through both (1) the light climate and (2) changes in substrate physico-chemistry. We tested these hypotheses in Pāuatahanui Inlet, New Zealand, by comparing seagrass presence, abundance, and health, together with light climate and substrate physico-chemistry at contrasting habitats where (1) seagrass used to thrive but no longer grows (historical seagrass), (2) seagrass still persists (existing seagrass) and (3) seagrass has been present recently, but not currently (potential seagrass). Historical seagrass substrate had significantly higher mud (35% average), bulk density (1.5 g cm⁻³), porewater ammonium concentration (65 μM), and a more reduced redox profile (negative redox at only 2 cm soil depth) as well as a lower light availability when submerged compared to other habitats, while total daily light exposure differed little between habitats. This suggests that failure of seagrass to recolonize historical seagrass habitat reflects substrate muddiness and consequent unfavorable rhizosphere conditions. Our results provide evidence for the multi-stressor effects of fine sediment on seagrasses, with substrate suitability for seagrass being detrimentally affected even where light exposure seems sufficient.en_NZ
dc.format.mimetypeapplication/pdf
dc.language.isoen
dc.publisherMDPIen_NZ
dc.rights© 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
dc.subjectsedimentationen_NZ
dc.subjectpollutionen_NZ
dc.subjectfine sedimenten_NZ
dc.subjectmuden_NZ
dc.subjectphotosynthetically available radiation (PAR)en_NZ
dc.subjectrhizosphereen_NZ
dc.subjectredox potentialen_NZ
dc.subjectsulfideen_NZ
dc.titleEffects of fine sediment on seagrass meadows: A case study of Zostera muelleri in pāuatahanui inlet, New Zealanden_NZ
dc.typeJournal Article
dc.identifier.doi10.3390/JMSE8090645en_NZ
dc.relation.isPartOfJournal of Marine Science and Engineeringen_NZ
pubs.elements-id257035
pubs.issue9en_NZ
pubs.publication-statusPublisheden_NZ
pubs.volume8en_NZ
dc.identifier.eissn2077-1312en_NZ


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