Data from: Multi-day water residence time as a mechanism for physical and biological gradients across intertidal flats
Description
Water properties and oyster performance may be heterogeneous across this wide tidal flat due to gradients in water residence time. SensorMetadataArchive: “Station” = general areas on the tidal flat, from channel to shore, including South Channel (ChS), North Channel (ChN), Outer Shore (ShOut), Middle Shore (ShMid), and Inner Shore (ShIn). “Data.Type” = oyster outplants or deployment of YSI6600 datasonde. “Sensor.Code” = identifier for the sensor used at each Station. “Deployed” and “Collected” = time frame over which measurements were collected. GPS positions are provided as north and west degrees (WGS84, decimal degrees), and in UTM (grid 10T) easting and northing (meters). Elevation = vertical position in meters relative to mean lower low water. “Distance.To.MLLW.contour” = closest distance to an elevation of -1.55 m relative to mean sea level in bathmetry provided by Olympic Natural Resources Center, in meters. 8_17_2008ChlMapArchive: Temperature (Temp C) was measured in degrees Celsius. Specific conductivity (SpCond) was measured in millisiemens per cm at 25 degrees Celsius and was converted to practical salinity units using equations in Wagner et al. (2006). Fluorescence is the number provided by the sensor, which was calibrated with bottle samples to provide chlorophyll-a in units of micrograms per liter (Chl.calibrated). “Notes” provide information on the positions and values of these bottle samples, as well as reasons for censoring some salinity data. Date and Time align for YSI6600 sampling water and GPS Garmin Geko recording position. OysterOutplants2007.Archive: Final size of oysters (Magallana = Crassostrea gigas) as shell height (measured from the hinge to the lip of the shell), shell width (perpendicular to shell height on upper valve; both in units of mm), and dry tissue mass. Condition index (CI) was calculated as the ratio of tissue dry mass (in mg) to shell height (in mm). “Notes” indicate some samples removed prior to analysis. 2008TS.Archive: Date and Time track 10-minute sampling intervals. “Temp” = water temperature in degrees Celsius. “SpCond” = specific conductivity of the water in units of millisiemens per cm at 25 degrees Celsius. The equations in Wagner et al. (2006) were used to calculate salinity (Sal), in practical salinity units, from specific conductivity. Bal sensor (+0.557) and DFW sensor (-0.75825) SpCond values were modified based on offsets when placed in common conditions. "Teg.depth.m" = water over sensor in meters. “Median.flood” = when water crossed median depth. 2007Chl.Archive: “Fluor” = raw fluorescence values from each sensor. "Fluor.cal" = adjusted to be internally consistent with dfw sensor based on deployment of all sensors in 14 different chlorophyll levels. Other column headings match 2008TS.Archive Results: Chlorophyll gradients and salinity lags were consistent with extended water residence time towards shore, reducing oyster condition.