{"datasetrec":{"DasID":2238,"Acronym":null,"StandardTitle":"MADS - macroalgae on stone reefs","OrigTitle":null,"OrigTitleLangID":15,"OrigTitleLangCode":"en","OrigTitleLang":"English","OrigTitleLangNL":"Engels","VersionName":"1","ContactEmail":null,"VersionDate":null,"VersionDay":22,"VersionMonth":1,"VersionYear":2010,"SizeReference":null,"EngAbstract":"Data on species areal cover of macro-algae.","EngDescr":"<b><i>Macroalgae</b></i>\r\n\r\nIt is possible to find macroalgae vegetation almost everywhere in Kattegat and the Belt Sea area and the western Baltic Sea where stone reefs are common. Salinity and light play an important role structuring the algae communities as do wave exposure at low water depth.\r\n\r\nIn Denmark more than 300 species of red, brown and green algae species is registered. Macroalgae forest on stone reefs are considered as important habitats for a large number of fish and animals.\r\n\r\n<b><i>Eelgrass</b></i>\r\nEelgrass is the most common marine angiosperm in Danish coastal waters where it dominates the vegetation on sandy substrates.\r\n\r\nEelgrass plays an important part in coastal areas due to its large productivity and biomass.\r\n\r\nEelgrass meadows are nursery areas for fish and invertebrates and the well-developed rhizomes contribute to stabilising the sediment and thereby reducing coastal erosion.\r\n\r\nEelgrass grows from the coast and down to maximum depths that depend on water clarity. In the inner parts of estuaries, the deepest eelgrass patches typically occur at a depth of around 3 m, while along open coasts eelgrass typically occurs down to 5-6 m depth. The deepest registrations of eelgrass in Danish coastal waters are found at about 10 m.\r\n\r\nThe cover of eelgrass typically describes a bell-shaped pattern with depth. Cover is low close to the coast where physical exposure generates loss of biomass, and in deeper water where light limits growth. Thus, maximum cover occurs at intermediate depths where exposure is moderate and light levels are still considerable.\r\n\r\nThe monitoring programme in connection with the \"Action plan for the marine environment\" includes measurements of the depth distribution of eelgrass as well as of the percentage coverage of eelgrass. Reductions in nutrient loads are expected to reduce the biomass of phytoplankton, thereby improving water clarity and allowing eelgrass to grow at greater depths and obtain higher coverage in deeper waters.\r\n\r\n<b><i>Data</b></i>\r\nData on species areal cover of macro-algae\r\nInformation on sampling locations within the Danish national marine monitoring program (NOVA 2003) and download of data can be accessed through the MADS website.","OrigAbstract":null,"OrigDescr":null,"Comments":null,"ReleaseDate":null,"ReleaseDate0":null,"OrigDescrLang":"English","EmbargoDate":null,"OrigDescrLangNL":"Engels","OrigLangCode":"en","OrigLangCodeExtended":"eng","OrigLangID":15,"DescrCompFlag":0,"DescrTransFlag":0,"Citation":null,"AccessConstraints":null,"UDate":"2010-01-22","CDate":"2010-01-22","CurrencyDate":null,"RevisionDate":null,"DateLastModified":{"date":"2026-05-14 01:44:00.153333","timezone_type":1,"timezone":"+02:00"},"CheckedFlag":0,"PublicFlag":1,"VlizCoreFlag":1,"MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"StatusID":1,"DasType":"Data","DasTypeID":1,"DasOrigin":"Monitoring: field survey","Progress":"In Progress","AccessConstraint":"Unrestricted","AccConstrEN":"Unrestricted","AccConstrDisplay":null,"License":null,"AccConstrDescription":"The data are freely available to anybody and may be used for any purpose. \r\nUsage acknowledgement may be required","Lineage":null,"AccConID":4},"dois":null,"spcols":[{"SpColID":552,"SpName":"EMODNET"},{"SpColID":620,"SpName":"not available through EurOBIS"}],"keywords":[{"ThesaurusTerm":"Algae","ThesTypID":1,"ThesType":"ASFA Thesaurus List","Code":"c_258","Description":null,"OrigThesTerm":"Algae","DutchTerm":"Algen","URI":"http://aims.fao.org/aos/agrovoc/c_258","DasKeywordDescr":null},{"ThesaurusTerm":"ANE, Baltic","ThesTypID":34,"ThesType":"ASFA Geoterms","Code":null,"Description":null,"OrigThesTerm":"ANE, Baltic","DutchTerm":null,"URI":null,"DasKeywordDescr":null},{"ThesaurusTerm":"ANE, Kattegat","ThesTypID":34,"ThesType":"ASFA Geoterms","Code":null,"Description":null,"OrigThesTerm":"ANE, Kattegat","DutchTerm":null,"URI":null,"DasKeywordDescr":null},{"ThesaurusTerm":"ANE, Skagerrak","ThesTypID":34,"ThesType":"ASFA Geoterms","Code":null,"Description":null,"OrigThesTerm":"ANE, Skagerrak","DutchTerm":null,"URI":null,"DasKeywordDescr":null}],"parents":[{"DasID":2234,"Acronym":"MADS","EngAbstract":"Data of the monitoring programmes for the marine environment in Denmark.\r\nThe dataset is no longer maintained (as per 1 July 2011 )","License":null,"StandardTitle":"The Danish national database for marine data","doi":null,"vlizDoi":null}],"children":null,"othrel":null,"othrelrev":null,"ownerships":[{"OrderNr":1,"Surname":null,"Firstname":null,"Initials":null,"PerPublicFlag":null,"AdrID":null,"Email":null,"InsPublicFlag":1,"Acronym":"NERI","OrigNameLangCode":null,"OrigNameLangID":null,"FullOrigName":null,"InsOwnerCNT":2,"PersID":null,"InsID":4407,"FullInstitute":"University of Aarhus; National Environmental Research Institute","RoleID":20,"Role":"Data owner","OrigName":null,"StandardName":"National Environmental Research Institute","FullAcronym":"AU-NERI","ORC":null,"ROR":null}],"taxterms":null,"frameworks":null,"otherterms":null,"temporal":[{"DasDateID":1958,"StartYear":1979,"EndYear":null,"StartDay":null,"EndDay":null,"StartDate":"1979-01-01","EndDate":null,"DasDate":null,"Resolution":null,"ResolutionNL":null,"Notes":null,"StartMonth0":null,"StartMonth":null,"StartMonthNL":null,"EndMonth0":null,"EndMonth":null,"EndMonthNL":null,"Progress":"In Progress","ProgressNL":"Gestart"}],"geographical":[{"GeoTerm":"Baltic Sea","DasGeoID":4567,"DasGeoTerm":null,"DasID":2238,"GeotID":77,"X":null,"Y":null,"MaxX":null,"MaxY":null,"StationName":null,"Precision":null,"CoordSystID":null,"GeoDatumID":null,"OrigCoordMinX":null,"OrigCoordMinY":null,"OrigCoordMaxX":null,"OrigCoordMaxY":null,"OrderNr":null,"Projection":null,"GeoDatum":null,"GeoObjectID":2401,"OrigGeoTerm":"Baltic Sea","DutchTerm":null},{"GeoTerm":"Belt Sea","DasGeoID":4566,"DasGeoTerm":null,"DasID":2238,"GeotID":6676,"X":null,"Y":null,"MaxX":null,"MaxY":null,"StationName":null,"Precision":null,"CoordSystID":null,"GeoDatumID":null,"OrigCoordMinX":null,"OrigCoordMinY":null,"OrigCoordMaxX":null,"OrigCoordMaxY":null,"OrderNr":null,"Projection":null,"GeoDatum":null,"GeoObjectID":3294,"OrigGeoTerm":"Belt Sea","DutchTerm":null},{"GeoTerm":"Kattegat","DasGeoID":4564,"DasGeoTerm":null,"DasID":2238,"GeotID":370,"X":null,"Y":null,"MaxX":null,"MaxY":null,"StationName":null,"Precision":null,"CoordSystID":null,"GeoDatumID":null,"OrigCoordMinX":null,"OrigCoordMinY":null,"OrigCoordMaxX":null,"OrigCoordMaxY":null,"OrderNr":null,"Projection":null,"GeoDatum":null,"GeoObjectID":2374,"OrigGeoTerm":"Kattegat","DutchTerm":"Kattegat"},{"GeoTerm":"Skagerrak","DasGeoID":4565,"DasGeoTerm":null,"DasID":2238,"GeotID":455,"X":null,"Y":null,"MaxX":null,"MaxY":null,"StationName":null,"Precision":null,"CoordSystID":null,"GeoDatumID":null,"OrigCoordMinX":null,"OrigCoordMinY":null,"OrigCoordMaxX":null,"OrigCoordMaxY":null,"OrderNr":null,"Projection":null,"GeoDatum":null,"GeoObjectID":2379,"OrigGeoTerm":"Skagerrak","DutchTerm":null}],"meastypes":null,"dasthemes":[{"DasThemeID":30,"DasTheme":"Biology > Ecology - biodiversity","DasTheme0":"Ecology - biodiversity","DutchTerm":"Ecologie - biodiversiteit"},{"DasThemeID":74,"DasTheme":"Biology > Macroalgae","DasTheme0":"Macroalgae","DutchTerm":"Macroalgen"}],"projects":null,"refs":null,"urls":null,"pictures":null,"urlmaps":null,"spatreps":null,"fileformats":null,"resmessage":"","complete":1}