{"refrec":{"BRefID":101277,"RR":"<b>Magni, P.; Montani, S.</b> (2006). Seasonal patterns of pore-water nutrients, benthic chlorophyll <i>a</i> and sedimentary AVS in a macrobenthos-rich tidal flat. <i>Hydrobiologia 571</i>: 297-311. <a href=\"https://dx.doi.org/10.1007/s10750-006-0242-9\" target=\"_blank\">https://dx.doi.org/10.1007/s10750-006-0242-9</a>","BEntID":96436,"PublicFlag":1,"CheckedFlag":0,"wosflag":1,"vabbflag":1,"RefStringPartII":". <i>Hydrobiologia 571</i>: 297-311. <a href=\"https://dx.doi.org/10.1007/s10750-006-0242-9\" target=\"_blank\">https://dx.doi.org/10.1007/s10750-006-0242-9</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Magni, P.; Montani, S.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Magni, P.; Montani, S.","Englishabstract":"Monthly field investigations were carried out at controlled low-tide in an estuarine intertidal sandflat of the Seto Inland          Sea (Japan) between January 1995 and April 1996. We assessed the spatial and temporal distribution of pore-water nutrient          [NH          <sub>4</sub>          <sup>+</sup>          -N, (NO          <sub>3</sub>          <sup>&#8722;</sup>          &nbsp;+&nbsp;NO          <sub>2</sub>          <sup>&#8722;</sup>          )-N, PO          <sub>4</sub>          <sup>3&#8722;</sup>          -P and Si(OH)<sub>4</sub>-Si], chlorophyll <i>a</i> (chl <i>a</i>) and acid-volatile sulphide (AVS) concentrations in the uppermost 0&#8211;10&nbsp;cm sediment horizon, and evaluated their relationships          with macrobenthic assemblages. Monthly hydrological data, nutrient and chl <i>a</i> concentrations in low-tide creek water adjacent to the flat were used as a complementary environmental characterisation of          the study area. All different pore-water nutrients showed a 10 to &gt; 30-fold variability between different layers and periods.          NH          <sub>4</sub>          <sup>+</sup>          -N, PO          <sub>4</sub>          <sup>3&#8722;</sup>          -P and Si(OH)<sub>4</sub>-Si concentrations were lowest in winter, progressively increased throughout spring and summer, and were highest between September          and October, with a major increase at intermediate (4&#8211;8&nbsp;cm) layers. In contrast, (NO          <sub>3</sub>          <sup>&#8722;</sup>          &nbsp;+&nbsp;NO          <sub>2</sub>          <sup>&#8722;</sup>          )-N concentrations, correlated positively with chl <i>a</i>, peaked in winter and sharply decreased with depth in all different seasons and in most occasions. Depth-integrated NH          <sub>4</sub>          <sup>+</sup>          -N, PO          <sub>4</sub>          <sup>3&#8722;</sup>          -P and Si(OH)<sub>4</sub>-Si pools were correlated positively with biogenic nutrient flux calculated from the nutrient excretion rates of dominant          bivalves <i>Ruditapes philippinarum</i> and <i>Musculista senhousia</i>. These relationships indicated rapid removal pathways of P, Si and N (i.e., every 0.1, 0.24 and 0.34&nbsp;day, respectively),          implying highly dynamic sediments. Based on the mass balance <i>P</i>&nbsp;=&nbsp;<i>F</i>&nbsp;+&nbsp;<i>I</i>, biogenic production (<i>P</i>) vs. diffusive flux (<i>F</i>) estimates suggested a predominant contribution of animal bioirrigation (<i>I</i>) to the upward flux of nutrients. AVS concentrations, correlated negatively with both (NO          <sub>3</sub>          <sup>&#8722;</sup>          &nbsp;+&nbsp;NO          <sub>2</sub>          <sup>&#8722;</sup>          )-N and chl <i>a</i>, showed a progressive increase from late summer throughout winter, subsequent to that of NH          <sub>4</sub>          <sup>+</sup>          -N, PO          <sub>4</sub>          <sup>3&#8722;</sup>          -P and Si(OH)<sub>4</sub>-Si. The results indicate that in our study area the spatial and temporal distribution of pore-water nutrients, chl <i>a</i> and AVS in sediments are strongly interlinked and suggest that the metabolic processes (e.g., excretion, bio-deposition)          and behavioural activities (e.g., particle mixing, bioirrigation) of abundant macrobenthos play an important role in the year-round          biogeochemical processes occurring on this flat.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Seasonal patterns of pore-water nutrients, benthic chlorophyll <i>a</i> and sedimentary AVS in a macrobenthos-rich tidal flat","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":2006,"MonPub":null,"DateUpdate":"2006-08-08","DateCreate":"2006-08-08","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000240308500023","VABBcode":null,"OpenAcc":0,"DOI":"10.1007/s10750-006-0242-9"},"refs":null,"anarec":{"AnaID":101277,"PubliDate":2006,"Pagination":"297-311","XtraPublOfAnaID":null,"ISBN":null,"Volume":"571","Issue":null,"BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":42943,"SerRR":"Hydrobiologia. Springer: The Hague.  ISSN 0018-8158; e-ISSN 1573-5117","StandardTitleSer":"Hydrobiologia","ISSN":"0018-8158","AbbrevSer":"Hydrobiologia","StandardTitleMon":null,"StartPage":297,"Pages":15,"ToPubliDate":null,"BRefBibLvlCode":"S","SerNotes":null},"monrec":null,"serrec":null,"relations":null,"relationsRev":null,"addrec":{"Line1":"IMC Località Sa 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