{"refrec":{"BRefID":16134,"RR":"<b>Flach, E.C.</b> (1993). The distribution of the amphipod <i>Corophium arenarium</i> in the Dutch Wadden Sea: relationships with sediment composition and the presence of cockles and lugworms. <i>Neth. J. Sea Res. 31(3)</i>: 281-290","BEntID":16134,"PublicFlag":1,"CheckedFlag":0,"wosflag":null,"vabbflag":null,"RefStringPartII":". <i>Neth. J. Sea Res. 31(3)</i>: 281-290","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Flach, E.C.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Flach, E.C.","Englishabstract":"On the tidal flats in the Dutch Wadden Sea <i>Corophium volutator</i> is a dominant species of the upper intertidal zone; the closely related <i>Corophium arenarium</i> is usually found in the lower zone, but only in low densities (a few hundreds per m²). A survey in the Dutch Wadden Sea showed that this zonation pattern was only present when a muddy sediment was found in the upper zone and a sandy in the lower zone. <i>C. arenarium</i> was restricted to sandy sediments, <i>C. volutator</i> to muddy sediments. Where a sandy sediment was found in the upper intertidal zone, <i>C. arenarium</i> locally occurred in relatively high densities (a few thousands per m² ). An aquarium experiment showed that <i>C. arenarium</i> actively avoided muddy sediments. Field experiments were carried out to study the influence of other macrozoobenthic species (known to affect the related <i>C. volutator</i>) on the abundance of <i>C. arenarium</i>. Within large defaunated areas small plots were stocked with different densities of the lugworm <i>Arenicola marina</i> and the cockle <i>Cerastoderma edule</i>. In small plots within a natural benthic community densities of these species were also augmented or (in <i>A. marina</i>) reduced. Strongly negative density-dependent effects of both <i>A. marina</i> and <i>C. edule</i> were found on the abundance of <i>C. arenarium</i>. In the natural situation, its densities showed <i>A. marina</i> to be the most important factor in determining the abundance of <i>C. arenarium</i>. In particular the removal of lugworms caused a strong increase in <i>C. arenarium</i> densities. These resu!ts agreed with the distribution of these species along a transect perpendicular to the shore of Schiermonnikoog, where a significant negative correlation was found between the densities of <i>A. marina</i> and <i>C. arenarium</i>. Aquarium experiments showed that the negative effect of cockles and lugworms must be due to migration rather than mortality in <i>C. arenarium</i>.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"The distribution of the amphipod <i>Corophium arenarium</i> in the Dutch Wadden Sea: relationships with sediment composition and the presence of cockles and lugworms","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":1993,"MonPub":null,"DateUpdate":"2001-09-14","DateCreate":"2001-08-20","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":null,"VABBcode":null,"OpenAcc":0},"refs":null,"anarec":{"AnaID":16134,"PubliDate":1993,"Pagination":"281-290","XtraPublOfAnaID":null,"ISBN":null,"Volume":"31","Issue":"3","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":44573,"SerRR":"Netherlands Journal of Sea Research. 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