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CPOM_flux_sed_OM_inital_29May2014_metadata.md

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Initil Determination of the OM content of the the sediments for the CPOM flux exp.

Metadata

Collected by: KDP and KF

Collected on: 29 May - 3 June 2014

Affiliation: Longwood University

Location: Lancer Park Pond

Description:

  • Sediments were collected from LPP with an Ekman and then sieved through a 250 um mesh to remove all macroinvertebrates and CPOM

  • The sediments were then allowd to settle ovenight and the overlying water was siphoned off

  • The remaining slurry was homogenized and 10 ml was place into a pre-weighed crucible

  • The sediments were then dried at 50 dC and ashed at 550 dC

Created: 5 June 2014

Modified:

Variables

Measured Variables

  • rep = the replicate identifier

  • cruc = the crucible identiying number

  • cruc.mass = the mass of the empty crucible (g)

  • cruc.wet = the mass of the crucible plus the wet sediments (g)

  • cruc.dry = the mass of the crucuble plus the sediments after drying at 50 dC (g)

  • cruc.ash = the mass of the crucible plus the ash after 4 h at 550 dC (g)

Calculated Variables

  • sed.wet =

R Code

rep <- c(1:5)
cruc <- c(1:5)
cruc.mass <- c(29.7378, 26.6517, 28.0753, 27.4867, 30.3799)
cruc.wet <- c(41.0326, 38.0633, 39.5898, 39.0056, 42.0787)
cruc.dry <- c(32.2242, 29.1841, 30.6054, 30.0275, 32.9646)
cruc.ash <- c(31.9088, 28.8573, 30.2828, 29.7007, 32.6316)

Calculated Variables

sed.wet <- cruc.wet - cruc.mass
sed.dry <- cruc.dry - cruc.mass
sed.ash <- cruc.ash - cruc.mass
prop.water <- 1 - (sed.dry / sed.wet)
prop.OM <- 1 - (sed.ash / sed.dry)

sedOM <- data.frame(rep, cruc, cruc.mass, cruc.wet, cruc.dry, cruc.ash, sed.wet, sed.dry, sed.ash, prop.water, prop.OM)

Output

write.table(sedOM, "./data/CPOM_flux_LPP_sed_OM_inital_29May2014.txt", row.names = F, sep = "\t", quote = F)