{"datasetrec":{"DasID":1196,"Acronym":null,"StandardTitle":"Vertical distribution of benthic foraminifers in sediments of contrasting environments and the relevance of sieve size","OrigTitle":"Verticale distributie van benthische foraminiferen in sediment van contrasterende milieus en de relevantie van zeef grootte","OrigTitleLangID":41,"OrigTitleLangCode":"nl","OrigTitleLang":"Dutch","OrigTitleLangNL":"Nederlands","VersionName":"1998","ContactEmail":null,"VersionDate":null,"VersionDay":null,"VersionMonth":null,"VersionYear":1998,"SizeReference":null,"EngAbstract":"The vertical distribution of benthic foraminifers in sediments from the Adriatic and the Aegean Sea was investigated in relationship to oxyen and food gradients. Results from this research are presented in this dataset.","EngDescr":"In this study, a comparison is made between the vertical distribution (0-10 cm) of living (stained) foraminifera in sediments from the shallow (19 & 20 m) eutrophic north-western Adriatic Sea and the deep (1288 & 1300 m) oligotrophic Aegean Sea. Vertical distribution was examined in relationship to oxygen and food gradients in the sediment.\r\n\r\nSediments in the Adriatic Sea supported a significantly large standing stock both in surface and subsurface layers. Although the oxygen penetration depth in the Adriatic does not exceed 2 mm, the habitat depth (defined as the depth above which 95 % of the total assemblage or population is found) range from 6 to 7 cm. Maximum oxygen penetration depth was found at the station in the southern Aegean Sea (E1, 10 cm) where the habitat depth was the shallowest (2 cm). The habitat depth was the deepest at the second Aegean Sea station (E2, 9 cm) that had an oxic zone of 27 mm. No direct correlation was found between the vertical distribution of the total assemblage  and food concentration.  \r\n\r\nDominant genera in the Adriatic Sea (Reophax, Nonionella, Stainforthia, Bolivina & Hopkinsina) had significantly higher densities in the upper 2-5 centimetres of the sediment but foraminifera were found down to 10 cm. Although both Adriatic stations (A1 & A2) have comparable sediment characteristics and oxygen penetration depth, a relatively larger proportion of the assemblages was found in deeper layers of the sediment at A2. On average, 70 % of the foraminifera were found below the main oxic zone at A2 and  approximately 34 % at station A1. Vertical distribution patterns of the different genera exhibited no direct correlation with oxygen, grain size or food content.  \r\n\r\nEpistominella was the most dominant genus at E1 in the Aegean Sea and was found only in the upper 2 cm although the oxygen penetration depth was much deeper (10 cm). At the other Aegean station (E2) where oxygen penetrated to 27 mm,  Epistominella was encountered down to 10 cm with no clear peak densities. The other dominant genus was Melonis that was irregularly distributed throughout the sediment. Brizalina was not dominant but exhibited a total different pattern; this genus was encountered only below the 0-1 cm layer. On average, 42 % of the foraminifera were found below the main oxic zone at E2.\r\n\r\nThree major patterns in the vertical distribution was evident: some genera have peak densities in the upper 2 cm, some genera that have peak densities in the upper 5 cm and, although not dominant, some genera were absent in the upper cm but occurred irregularly in deeper layers of the sediment. These trends could not be directly correlated either with oxygen or food gradients in the sediment. This suggests that site-specific factors (e.g. bioturbation, competition , species interactions) may be involved. This is supported by the fact that, in spite of similar abiotic conditions, different vertical distribution patterns are seen for common genera at different stations.\r\n\r\nOn average, the > 63 µm fraction represented 40 - 60 % of the total assemblage in the Adriatic Sea and 55-74 % of the total assemblage in the Aegean Sea. Although the major trends remain evident in the 63 µm fraction, finer details are obscured; this was more so the case in the shallow Adriatic Sea sediments.","OrigAbstract":"Data verzameld na een vergelijkende studie van de vertikale verspreiding van benthische foraminiferen in de sedimenten van de Adriatische Zee en de Egeïsche Zee. Deze vertikale distributie werd vervolgens vergeleken met de sedimentaire zuurstof- en voedselgradiënt. Een overzicht van deze gegevens kan u terugvinden in deze dataset.","OrigDescr":"In deze studie is een vergelijking gemaakt tussen de verticale distributie (0-10 cm) van levende (gekleurde) foraminiferen in het sediment van de ondiepe (19 & 20 m), eutrofe noordwest Adriatische Zee en de diepe (1288 & 1300 m), oligotrofe Egeïsche Zee. Verticale distributie werd gerelateerd aan zuurstof- en voedselgradiënten in het sediment.\r\n\r\nIn het sediment in de Adriatische Zee worden grote aantallen individuen gevonden in zowel de oppervlakte als de diepere lagen. Hoewel de zuurstof penetratie diepte in de Adriatische Zee minder dan 2 mm is, is de habitat diepte (gedefinieerd als de diepte waarboven zich 95% van het totaal aantal individuen of de populatie bevindt) 6 tot 7 cm. De maximale zuurstof penetratie diepte werd gevonden bij het station in de zuid Egeïsche Zee (E1, 10 cm) waar de habitat diepte het laagst was (2 cm). De habitat diepte was het diepst in het tweede station in de Egeïsche Zee (E2, 9 cm) waar zuurstof werd gedetecteerd tot 27 mm. Er is geen directe correlatie gevonden tussen de verticale distributie van het totaal aantal individuen en de voedselconcentratie.\r\n\r\nDominante genera in de Adriatische Zee (Reophax, Nonionella, Stainforthia, Bolivina & Hopkinsina) hadden significant hogere dichtheden in de bovenste 2-5 cm van het sediment, maar foraminiferen werden gevonden tot 10 cm. Hoewel allebei de stations in de Adriatische Zee (A1 en A2) vergelijkbaar sediment en zuurstof penetratie diepte hebben, wordt een relatief groter deel van het totaal aantal individuen gevonden in de diepere lagen van station A2. Gemiddeld werd 70% van de foraminiferen gevonden beneden de belangrijkste zuurstoflaag in station A2 en circa 34 % in station A1. Verticale distributie patronen van de verschillende genera vertonen geen directe correlatie met zuurstof, korrelgrootte of voedselrijkdom.\r\n\r\nEpistominella  was de meest dominante genus in station E1 in de Egeïsche Zee, en werd alleen gevonden in de bovenste 2 cm, hoewel de zuurstof penetratie diepte veel dieper was (10 cm). In het andere station in de Egeïsche Zee (E2) , waar de zuurstof penetratie diepte 27 mm was, werd Epistominella aangetroffen tot 10 cm diepte, zonder duidelijke piek dichtheden. De andere dominante genus was Melonis, die onregelmatig was verspreid in het sediment. Brizalina was niet dominant maar vertoonde een totaal ander patroon;  deze soort werd alleen aangetroffen beneden de 0-1 cm laag. Gemiddeld werd 42 % van de foraminiferen gevonden beneden de zuurstof zone in station E2. \r\n\r\nDrie hoofd patronen in de verticale distributie duidelijk te onderscheiden: sommige genera hadden piek dichtheden in de bovenste 2 cm, sommige genera hadden piek dichtheden in de bovenste 5 cm, hoewel niet dominant, sommige genera waren afwezig in de bovenste cm, maar kwamen onregelmatig verspreid voor in de diepere lagen van het sediment. Deze trends konden niet direct worden gecorreleerd aan zuurstof- of voedselgradiënten in het sediment. Dit suggereert dat gebieds specifieke factoren (bijvoorbeeld bioturbatie, competitie, interacties tussen soorten) van invloed kunnen zijn. Dit wordt gesteund door het feit dat , ondanks gelijke abiotische condities, er verschillen in de verticale distributie worden waargenomen voor algemene soorten bij de verschillende stations.\r\n\r\nGemiddeld vertegenwoordigde de > 63 µm fractie 40-60 % van het totaal aantal individuen in de Adriatische Zee en 55-74 % van het totaal aantal individuen in de Egeïsche Zee. Hoewel de hoofd trends gelijk blijven in de 63 µm fractie werden fijnere details vervaagd; dit was het duidelijkst in de ondiepe Adriatische Zee.","Comments":null,"ReleaseDate":null,"ReleaseDate0":null,"OrigDescrLang":"Dutch","EmbargoDate":null,"OrigDescrLangNL":"Nederlands","OrigLangCode":"nl","OrigLangCodeExtended":"dut","OrigLangID":41,"DescrCompFlag":0,"DescrTransFlag":0,"Citation":"Moodley L., Breur E., Soetaert K. 1997: Vertical distribution of benthic foraminifers in sediments of contrasting environments and the relevance of sieve size. Netherlands Institute of Ecology; Centre for Estuarine and Marine Ecology, Netherlands. Metadata available at http://mda.nioo.knaw.nl/imis.php?module=dataset&dasid=1196","AccessConstraints":null,"UDate":"2009-10-08","CDate":"2007-04-05","CurrencyDate":null,"RevisionDate":null,"DateLastModified":{"date":"2026-05-23 01:39:24.004480","timezone_type":1,"timezone":"+02:00"},"CheckedFlag":1,"PublicFlag":1,"VlizCoreFlag":1,"MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"StatusID":1,"DasType":"Data","DasTypeID":1,"DasOrigin":"Research: field survey","Progress":"Completed","AccessConstraint":null,"AccConstrEN":null,"AccConstrDisplay":null,"License":null,"AccConstrDescription":null,"Lineage":null,"AccConID":null},"dois":null,"spcols":[{"SpColID":131,"SpName":"Belgian marine datasets"},{"SpColID":345,"SpName":"NIOO-CEME collection"}],"keywords":[{"ThesaurusTerm":"MED, Adriatic","ThesTypID":34,"ThesType":"ASFA Geoterms","Code":null,"Description":null,"OrigThesTerm":"MED, Adriatic","DutchTerm":null,"URI":null,"DasKeywordDescr":null},{"ThesaurusTerm":"MED, 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verdeling","URI":"http://aims.fao.org/aos/agrovoc/c_6a4c1369","DasKeywordDescr":null}],"parents":null,"children":null,"othrel":null,"othrelrev":null,"ownerships":[{"OrderNr":3,"Surname":null,"Firstname":null,"Initials":null,"PerPublicFlag":null,"AdrID":null,"Email":null,"InsPublicFlag":1,"Acronym":null,"OrigNameLangCode":"nl","OrigNameLangID":41,"FullOrigName":null,"InsOwnerCNT":1,"PersID":null,"InsID":60,"FullInstitute":"Koninklijk Nederlands Instituut voor Onderzoek der Zee; NIOZ Yerseke","RoleID":20,"Role":"Data owner","OrigName":null,"StandardName":"NIOZ Yerseke","FullAcronym":"NIOZ","ORC":null,"ROR":null}],"taxterms":[{"DasTaxtTypID":1,"DasTaxtType":"Taxonomic 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Plants","DasTheme0":"Plants","DutchTerm":"Planten"}],"projects":null,"refs":[{"0":109454,"BRefID":109454,"1":"Based on this dataset","Relation":"Based on this dataset","2":2,"RelationID":2,"3":"<b>Breur, E.</b> [s.d.]. Verticale distributie van benthische Foraminiferen in sediment van contrastrerende milieus en de relevantie van zeefgrootte. [S.n.]: [s.l.].  ","RR":"<b>Breur, E.</b> [s.d.]. Verticale distributie van benthische Foraminiferen in sediment van contrastrerende milieus en de relevantie van zeefgrootte. [S.n.]: [s.l.].  ","4":"Verticale distributie van benthische Foraminiferen in sediment van contrastrerende milieus en de relevantie van zeefgrootte","StT":"Verticale distributie van benthische Foraminiferen in sediment van contrastrerende milieus en de relevantie van zeefgrootte","5":"Breur, E.","RSA":"Breur, E.","6":"Gebaseerd op deze dataset","DutchTerm":"Gebaseerd op deze dataset","7":null,"AnaDate":null,"8":null,"MonDate":null,"9":". [S.n.]: [s.l.].  ","":". [S.n.]: [s.l.].  ","10":null,"doi":null}],"urls":[{"URL":"mda.vliz.be/mda/directlink.php?fid=VLIZ_00000007_1177317226","externalID":"VLIZ_00000007_1177317226","URLTypeCode":null,"URLType":"Archived file","URLTypID":28,"downloadURL":"https://mda.vliz.be/download.php?file=VLIZ_00000007_1177317226","FileName":"Abiotic variables.xls","Extension":"XLS"},{"URL":"mda.vliz.be/mda/directlink.php?fid=VLIZ_00000007_1177317402","externalID":"VLIZ_00000007_1177317402","URLTypeCode":null,"URLType":"Archived file","URLTypID":28,"downloadURL":"https://mda.vliz.be/download.php?file=VLIZ_00000007_1177317402","FileName":"Abundance of benthic foraminifers (0-10 cm).xls","Extension":"XLS"}],"pictures":null,"urlmaps":null,"spatreps":null,"fileformats":null,"resmessage":"","complete":1}