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