{"refrec":{"BRefID":365773,"RR":"<b>Cecchetto, M.M.; Moser, A.; Smith, C.R.; van Oevelen, D.; Sweetman, A.K.</b> (2023). Abyssal seafloor response to fresh phytodetrital input in three areas of particular environmental interest (APEIs) in the western clarion-clipperton zone (CCZ). <i>Deep-Sea Res., Part 1, Oceanogr. Res. Pap. 195</i>: 103970. <a href=\"https://dx.doi.org/10.1016/j.dsr.2023.103970\" target=\"_blank\">https://dx.doi.org/10.1016/j.dsr.2023.103970</a>","BEntID":363495,"PublicFlag":1,"CheckedFlag":0,"wosflag":1,"vabbflag":1,"RefStringPartII":". <i>Deep-Sea Res., Part 1, Oceanogr. Res. Pap. 195</i>: 103970. <a href=\"https://dx.doi.org/10.1016/j.dsr.2023.103970\" target=\"_blank\">https://dx.doi.org/10.1016/j.dsr.2023.103970</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":0,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Cecchetto, M.M.; Moser, A.; Smith, C.R.; van Oevelen, D.; Sweetman, A.K.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Cecchetto, M.M. <i>et al.</i>","Englishabstract":"The abyssal seafloor (3500–6000m) remains largely unexplored  but with    deep-sea mining imminent, anthropogenic impacts may soon reach abyssal    communities. Thus, there is a growing need for baseline studies of    biodiversity, ecosystem functioning, and connectivity in both potential    mining  and no-mining areas across the Clarion-Clipperton Zone (CCZ), a key    target  region for polymetallic nodule mining. In this study, in situ    pulse-chase lander experiments were conducted for 1.5 days in three    no-mining  areas (called Areas of Particular Environmental Interest, or    APEIs) in the  western CCZ, a region with a seafloor particulate organic    carbon (POC)  flux gradient. A decreasing trend was seen in mean seafloor    respiration,  macrofaunal abundance, and biomass from the more eutrophic    APEI 7 to the more  oligotrophic APEI 1, although this trend was not    statistically significant  (p = 0.18) most likely due to small samples sizes    and high  variability. In this study, most (96%) of the    <sup>13</sup>C-labeled  processed phytodetritus was respired within 1.5    days. Experimental  uptake of phytodetritus by macrofauna and bacteria was    detected but  was lower than in the previously studied and more eutrophic    eastern CCZ over  similar time scales (1.5 d). Bacteria dominated the    short-term (∼1.5 d) uptake of organic carbon at the seafloor, yet    macrofauna processed more organic carbon per unit biomass than previously    found  in the eastern CCZ (0.003 mg C m <sup>−2</sup> d <sup>−1</sup> and    0.5 × 10 <sup>−5</sup> mg C m <sup>−2</sup> d <sup>−1</sup> for  the western    and eastern CCZ, respectively). Our study provides important  information on    C-uptake and respiration rates in areas set aside from mining in  the    western CCZ and suggests high variability may occur in the rates of benthic    C<sub>org</sub>-cycling across the CCZ. We recommend that benthic  ecosystem    functions be explored across gradients of POC flux which may be  a major    environmental factor driving ecosystem dynamics in the CCZ.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Abyssal seafloor response to fresh phytodetrital input in three areas of particular environmental interest (APEIs) in the western clarion-clipperton zone (CCZ)","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2026-04-19 01:32:21.440129","timezone_type":1,"timezone":"+02:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":"Deep-sea mining; Polymetallic nodules; Clarion clipperton zone (CCZ); Area of particular environmental interest (APEI); Benthic ecosystem functioning; Pulse-chase experiments; Carbon cycling","OtherDescriptors":null,"Notes":null,"AnaPub":2023,"MonPub":null,"DateUpdate":"2023-07-20","DateCreate":"2023-07-20","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:001028737900001","VABBcode":null,"OpenAcc":0,"DOI":"10.1016/j.dsr.2023.103970"},"refs":null,"anarec":{"AnaID":365773,"PubliDate":2023,"Pagination":"103970","XtraPublOfAnaID":null,"ISBN":null,"Volume":"195","Issue":null,"BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":45506,"SerRR":"Deep-Sea Research, Part I. 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