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- W2031475756 abstract "MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsTheme Sections MEPS 474:105-119 (2013) - DOI: https://doi.org/10.3354/meps10085 Growth and chronology of the rhodolith-forming, coralline red alga Sporolithon durum Nicolas Darrenougue1,*, Patrick De Deckker1, Claude Payri2, Stephen Eggins1, Stewart Fallon1 1Research School of Earth Sciences, The Australian National University, Canberra 0200, Australia 2Institut de Recherche pour le Développement, UR227, Nouméa, New Calédonia *Email: nicolas.darrenougue@anu.edu.au ABSTRACT: We report extension rates and growth patterns of the coralline red alga Sporolithon durum (rhodolith form) from New Caledonia. Alizarin red S staining was used to mark 43 rhodolith branches and helped determine extension rates over the rhodoliths’ last living year. A combination of radiocarbon dating, major Mg/Ca ratio cycles and growth band determinations provided a chronological approach to characterise extension rates for 5 branches over the last 5 decades. A seasonal asymmetry in the extension rates was observed, with higher extension during the austral summer−fall−winter period, indicating that variations in ambient seawater temperature are not of major influence in the seasonal growth pattern of S. durum. At the sub-seasonal level, minor growth bands were observed with a maximum frequency of 14 d but were too variable to be considered as a reliable chronological tool. The concordance of the results from both the monitoring experiment over the year 2010 to 2011 and the chronological approach applied to the period 1968 to 2008 suggests that an extension rate (mean ± SD) of 0.6 ± 0.2 mm yr−1 is typical of the S. durum community at the study site. However, annual extension rates varied considerably among branches and individuals. Long-term trends still appeared, such as a decrease during the early 1970s attributed to the impact of mining activity. A slight but consistent decrease was observed in the annual extension rates throughout the record and may reflect an ontogenic effect potentially enhanced by reduced light penetration due to increasing suspended particulate matter in the water column. KEY WORDS: Crustose coralline algae · Extension rate · Radiocarbon · Seasonal pattern · New Caledonia Full text in pdf format Supplementary material PreviousNextCite this article as: Darrenougue N, De Deckker P, Payri C, Eggins S, Fallon S (2013) Growth and chronology of the rhodolith-forming, coralline red alga Sporolithon durum. Mar Ecol Prog Ser 474:105-119. https://doi.org/10.3354/meps10085 Export citation RSS - Facebook - Tweet - linkedIn Cited by Published in MEPS Vol. 474. Online publication date: January 31, 2013 Print ISSN: 0171-8630; Online ISSN: 1616-1599 Copyright © 2013 Inter-Research." @default.
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- W2031475756 title "Growth and chronology of the rhodolith-forming, coralline red alga Sporolithon durum" @default.
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