{"refrec":{"BRefID":231078,"RR":"<b>Rao, A.M.F.; Polerecky, L.; Ionescu, D.; Meysman, F.J.R.; de-Beer, D.</b> (2012). The influence of pore-water advection, benthic photosynthesis, and respiration on calcium carbonate dynamics in reef sands. <i>Limnol. Oceanogr. 57(3)</i>: 809-825. <a href=\"http://dx.doi.org/10.4319/lo.2012.57.3.0809\" target=\"_blank\">dx.doi.org/10.4319/lo.2012.57.3.0809</a>","BEntID":222790,"PublicFlag":1,"CheckedFlag":1,"wosflag":1,"vabbflag":null,"RefStringPartII":". <i>Limnol. Oceanogr. 57(3)</i>: 809-825. <a href=\"https://dx.doi.org/10.4319/lo.2012.57.3.0809\" target=\"_blank\">https://dx.doi.org/10.4319/lo.2012.57.3.0809</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Rao, A.M.F.; Polerecky, L.; Ionescu, D.; Meysman, F.J.R.; de-Beer, D.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Rao, A.M.F. <i>et al.</i>","Englishabstract":"To investigate diel calcium carbonate (CaCO<sub>3</sub>) dynamics in permeable coral reef sands, we measured pore-water profiles and fluxes of oxygen (O<sub>2</sub>), nutrients, pH, calcium (Ca<sup>2+</sup>), and alkalinity (TA) across the sediment-water interface in sands of different permeability at Heron Reef, Australia. Background flushing rates were high, most likely as a result of infaunal burrow irrigation, but flux chamber stirring enhanced pore-water exchange. Light and pore-water advection fueled high rates of benthic primary production and calcification in sunlit surface sediments. In the light, benthic photosynthesis and calcification induced surface minima in Ca<sup>2+</sup> and TA and peaks in pH and O<sub>2</sub>. Oxygen penetration depth in coarse sands decreased from ~ 1.2 cm during the day to ~ 0.6 cm at night. Total oxygen uptake (TOU) in dark chambers was three to fourteen times greater than diffusive uptake and showed a direct effect of pore-water advection. Greater sediment oxygen consumption rates were observed in higher permeability sands. In the dark, TA release was not stimulated by increasing TOU because of a damping effect of pore-water advection on metabolic CaCO<sub>3</sub> dissolution efficiency. On a daily basis, CaCO<sub>3</sub> undergoes net dissolution in Heron Reef sands. However, pore-water advection can reverse the CaCO<sub>3</sub> budget and promote CaCO<sub>3</sub> preservation under the most energetic conditions.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"The influence of pore-water advection, benthic photosynthesis, and respiration on calcium carbonate dynamics in reef sands","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2024-12-10 01:33:17.368041","timezone_type":1,"timezone":"+01:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":null,"OtherDescriptors":null,"Notes":null,"AnaPub":2012,"MonPub":null,"DateUpdate":"2015-06-16","DateCreate":"2013-12-01","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000306239300011","VABBcode":null,"OpenAcc":1,"DOI":"10.4319/lo.2012.57.3.0809"},"refs":null,"anarec":{"AnaID":231078,"PubliDate":2012,"Pagination":"809-825","XtraPublOfAnaID":null,"ISBN":null,"Volume":"57","Issue":"3","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":43511,"SerRR":"Limnology and Oceanography. 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