column_name description unit Date Date dd-mm-yy Transect Transect plot plot Transect_plot Transect_plot Observer_shells Observer_shells Observer_biodiversity Observer_biodiversity Location Location Time Time hh:mm:ss GPS_WP GPS_WP X_RD X_coordinate rijksdriehoek coodinaten stelsel amersfoort_RD Y_RD X_coordinate rijksdriehoek coodinaten stelsel amersfoort_RD depth depth m Frame size_m2 Frame/quadrat size m2 distance_plots_m distance between quadrats m #_flat_oysters_alive_ #_flat_oysters_alive_in quadrat #_0.25m2 #_japanese_oysters_alive #_japanese_oysters_alive_in quadrat #_0.25m3 %_blue_mussels_alive %_blue_mussels_alive % %_alive_ensis %_alive_ensis % shellfishreef shellfishreef or bare sand? binairy L_flat_oyster_1_cm lenght flat oyster 1 cm W_flat_oyster_1_cm width flat oyster 1 cm L_flat_oyster_2_cm lenght flat oyster 2 cm W_flat_oyster_2_cm width flat oyster 2 cm L_flat_oyster_3_cm lenght flat oyster 3 cm W_flat_oyster_3_cm width flat oyster 3 cm L_flat_oyster_4_cm lenght flat oyster 4 cm W_flat_oyster_4_cm width flat oyster 4 cm L_flat_oyster_5_cm lenght flat oyster 5 cm W_flat_oyster_5_cm width flat oyster 5 cm L_flat_oyster_6_cm lenght flat oyster 6 cm W_flat_oyster_6_cm width flat oyster 6 cm L_jap_oyster_1 lenght pacific oyster 1 cm L_jap_oyster_2 lenght pacific oyster 2 cm L_jap_oyster_3 lenght pacific oyster 3 cm L_jap_oyster_4 lenght pacific oyster 4 cm L_jap_oyster_5 lenght pacific oyster 5 cm L_mussel_1 lenth blue mussel 1 cm L_mussel_2 lenth blue mussel 2 cm L_mussel_3 lenth blue mussel 3 cm L_mussel_4 lenth blue mussel 4 cm L_mussel_5 lenth blue mussel 5 cm fl_oysters_as_substrate_flat_oyster nr of indiv flat oysters that used shells of flat oyster as substrate # jap_oysters_as_substrate_flat_oyster nr of indiv flat oysters that used shells of pacific oyster as substrate # dead_shell_as_substrate_flat_oyster nr of indiv flat oysters that used shells of other bivalves as substrate # other_as_substrate_flat_oyster species of othe bivalve _as_substrate_flat_oyster # nothing_as_substrate_flat_oyster nr of indiv flat oysters where no substrate was attached to # %_flatoyster_attached_to_japaneseoyster %_flatoyster_attached_to_japaneseoyster % %_flatoyster_attached_to_othershell %_flatoyster_attached_to_othershell % Sed_rock_stone_% sediment covered by rock and stone % Sed_coarse_substrate_sand sediment covered by coarse sand % Sed_fine_mud_clay sediment covered by fine mud and clay % Ulva sp. number of individuals of species_Ulva sp. #_m2 Roodwier number of individuals of species_Roodwier #_m2 Bruinwier number of individuals of species_Bruinwier #_m2 Japans bessenwier number of individuals of species_Japans bessenwier #_m2 Boorspons number of individuals of species_Boorspons #_m2 Geweispons number of individuals of species_Geweispons #_m2 Slikkokerworm sp. number of individuals of species_Slikkokerworm sp. #_m2 Zeeanjelier number of individuals of species_Zeeanjelier #_m2 Slibanemoon number of individuals of species_Slibanemoon #_m2 Weduweroos number of individuals of species_Weduweroos #_m2 Asgrauwe keverslak number of individuals of species_Asgrauwe keverslak #_m2 Fuikhoren sp. number of individuals of species_Fuikhoren sp. #_m2 Muiltje number of individuals of species_Muiltje #_m2 Tapijtschelp number of individuals of species_Tapijtschelp #_m2 Mossel_% cover of species_Mossel_% % Mossel_# number of individuals of species_Mossel_# #_m2 Japanse oester % cover of species_Japanse oester % % Platte oester % cover of species_Platte oester % % Japanse oester # number of individuals of species_Japanse oester # #_m2 Platte oester # number of individuals of species_Platte oester # #_m2 Groene wierslak number of individuals of species_Groene wierslak #_m2 Grote vlokslak number of individuals of species_Grote vlokslak #_m2 Levendbarende slangster number of individuals of species_Levendbarende slangster #_m2 Brokkelster number of individuals of species_Brokkelster #_m2 Zeepokken sp. number of individuals of species_Zeepokken sp. #_m2 Geknikte aasgarnaal number of individuals of species_Geknikte aasgarnaal #_m2 Gezaagde steurgarnaal number of individuals of species_Gezaagde steurgarnaal #_m2 Gewone steurgarnaal number of individuals of species_Gewone steurgarnaal #_m2 Heremietkreeft number of individuals of species_Heremietkreeft #_m2 Decapoda juv. number of individuals of species_Decapoda juv. #_m2 Harig porceleinkrabbetje number of individuals of species_Harig porceleinkrabbetje #_m2 Strandkrab number of individuals of species_Strandkrab #_m2 Fluwelen zwemkrab number of individuals of species_Fluwelen zwemkrab #_m2 Blaasjeskrab number of individuals of species_Blaasjeskrab #_m2 Penseelkrab number of individuals of species_Penseelkrab #_m2 Doorschijnende zakpijp number of individuals of species_Doorschijnende zakpijp #_m2 Druipzakpijp_% cover of species_Druipzakpijp_% % Eenkleurige botrylloides_% cover of species_Eenkleurige botrylloides_% % Tweekleurige botrylloides_% cover of species_Tweekleurige botrylloides_% % Glanzende bolzakpijp_% cover of species_Glanzende bolzakpijp_% % Grijze korstzakpijp_% cover of species_Grijze korstzakpijp_% % Gesterde geleikorst_% cover of species_Gesterde geleikorst_% % Botervis number of individuals of species_Botervis #_m2 Groene zeedonderpad number of individuals of species_Groene zeedonderpad #_m2 Gewone zeedonderpad number of individuals of species_Gewone zeedonderpad #_m2 Grondel sp. (zwarte) number of individuals of species_Grondel sp. (zwarte) #_m2 Hydrozoa sp. number of individuals of species_Hydrozoa sp. #_m2 Porifera sp. number of individuals of species_Porifera sp. #_m2 Bryozoa sp_% cover of species_Bryozoa sp_% % Noordzeekrab number of individuals of species_Noordzeekrab #_m2 Ruthensspar grondel number of individuals of species_Ruthensspar grondel #_m2 Zeedahlia number of individuals of species_Zeedahlia #_m2 Zeester (Asterias) number of individuals of species_Zeester (Asterias) #_m2 Ascidiella sp. number of individuals of species_Ascidiella sp. #_m2 bruine plooislak number of individuals of species_bruine plooislak #_m2 gehoornde slijmvis number of individuals of species_gehoornde slijmvis #_m2 Paarse buisjespons number of individuals of species_Paarse buisjespons #_m2 Gewimperde zwemkrab number of individuals of species_Gewimperde zwemkrab #_m2 stenen number of individuals of species_stenen #_m2 Slijmkokerworm_% cover of species_Slijmkokerworm_% % Ruigkrabje number of individuals of species_Ruigkrabje #_m2 Bugula plumosa number of individuals of species_Bugula plumosa #_m2 Bleke piekjesspons number of individuals of species_Bleke piekjesspons #_m2 Groene golfbrekeranemoon number of individuals of species_Groene golfbrekeranemoon #_m2 Gewone broodspons number of individuals of species_Gewone broodspons #_m2 Rugstreepsteurgarnaal number of individuals of species_Rugstreepsteurgarnaal #_m2 Sabella pavonina number of individuals of species_Sabella pavonina #_m2 Mya number of individuals of species_Mya #_m2 5dradige meun number of individuals of species_5dradige meun #_m2 Hooiwagenkrab number of individuals of species_Hooiwagenkrab #_m2 Crangon crangon number of individuals of species_Crangon crangon #_m2 Sierlijke slibanemoon number of individuals of species_Sierlijke slibanemoon #_m2 Japanse knotszakpijp number of individuals of species_Japanse knotszakpijp #_m2 Schelpkokerworm number of individuals of species_Schelpkokerworm #_m2 electra number of individuals of species_electra #_m2 astenas number of individuals of species_astenas #_m2 # soorten total number of species #_m2 platte_oester_m2 native European flat oyster density #_m2 japanse_oester_m2 invasive Pacific oyster density #_m2 tot_shellfish_density_m2 total bivalve density #_m2