{"refrec":{"BRefID":211282,"RR":"<b>Braeckman, U.; Van Colen, C.; Soetaert, K.; Vincx, M.; Vanaverbeke, J.</b> (2011). Contrasting macrobenthic activities differentially affect nematode density and diversity in a shallow subtidal marine sediment. <i>Mar. Ecol. Prog. Ser. 422</i>: 179-191. <a href=\"http://dx.doi.org/10.3354/meps08910\" target=\"_blank\">dx.doi.org/10.3354/meps08910</a>","BEntID":203204,"PublicFlag":1,"CheckedFlag":1,"wosflag":1,"vabbflag":1,"RefStringPartII":". <i>Mar. Ecol. Prog. Ser. 422</i>: 179-191. <a href=\"https://dx.doi.org/10.3354/meps08910\" target=\"_blank\">https://dx.doi.org/10.3354/meps08910</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":0,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Braeckman, U.; Van Colen, C.; Soetaert, K.; Vincx, M.; Vanaverbeke, J.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Braeckman, U. <i>et al.</i>","Englishabstract":"By bioturbating and bio-irrigating the sea floor, macrobenthic organisms transport organic matter and oxygen from the surface to deeper layers, thereby extending the habitat suitable for smaller infauna. Next to these engineering activities, competition, disturbance and predation may also affect the spatial distribution of these smaller organisms. In a controlled laboratory experiment, we studied the effects of 3 functionally different macrobenthic species on the vertical distribution of nematodes. <i>Abra alba</i>, a suspension-deposit feeding bivalve reworking the sediment randomly, <i>Lanice conchilega</i>, a suspension-deposit feeding, tube-irrigating polychaete and <i>Nephtys hombergii</i>, a burrowing predatory polychaete, were added in single-species treatments to sediment from a coastal subtidal station in the Belgian part of the North Sea, sieved (1 mm) to remove macrofauna. After 14 d, the control treatment without macrobenthos was found to be detrimental to nematode density and diversity, which points to the importance of macrobenthic engineering to sustain the smaller components of the food web. Nematode densities were highest at the sediment surface in all treatments, but subsurface density peaks were observed in <i>A. alba</i> (to 3 cm depth) and <i>L. conchilega</i> (to 7 cm depth) microcosms. In the <i>A. alba</i> treatment, the dominant non-selective deposit feeders and the epistrate feeders shifted downwards probably to avoid disturbance and exploitative competition by the bivalve siphons at the surface, while they might have benefited from the faecal pellets deposited in the subsurface. In the <i>L. conchilega</i> treatment, the several dominant species were redistributed over depth layers, indicating polychaete-mediated habitat extension from surface into depth. Nematode communities seemed hardly affected by the presence of <i>N. hombergii</i>. These results reveal that functionally contrasting macrobenthic engineering effects shape nematode communities in different ways, which may maintain the role of nematodes in ecosystem functioning. The present study therefore highlights the need for conservation of macrobenthic functional diversity.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Contrasting macrobenthic activities differentially affect nematode density and diversity in a shallow subtidal marine sediment","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":"Bioturbation; Macrobenthos; Ecosystem engineering; Nematodes; Vertical","OtherDescriptors":null,"Notes":null,"AnaPub":2011,"MonPub":null,"DateUpdate":"2015-09-09","DateCreate":"2011-12-22","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000286933500017","VABBcode":null,"OpenAcc":1,"DOI":"10.3354/meps08910"},"refs":null,"anarec":{"AnaID":211282,"PubliDate":2011,"Pagination":"179-191","XtraPublOfAnaID":null,"ISBN":null,"Volume":"422","Issue":null,"BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":43354,"SerRR":"Marine Ecology Progress Series. 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