ERDDAP > info > bcodmo_dataset_995681_v1

Grid DAP Data	Sub- set	Table DAP Data	Make A Graph	W M S	Source Data Files	Acces- sible	Title	Sum- mary	FGDC, ISO, Metadata	Back- ground Info	RSS	E mail	Institution	Dataset ID
		data	graph		files	public	[Mesopelagic decay experiments: Biochemical decay rates] - Biochemical decay rates from mesopelagic decay experiments with Thalassiosira weissflogii, Emiliania huxleyii, and Tetraselmis sp. (Collaborative Research: Transforming Carbon in the Deep Sea)		M	background			BCO-DMO	bcodmo_dataset_995681_v1

The Dataset's Variables and Attributes

Row Type	Variable Name	Attribute Name	Data Type	Value
attribute	NC_GLOBAL	cdm_data_type	String	Other
attribute	NC_GLOBAL	Conventions	String	COARDS, CF-1.6, ACDD-1.3
attribute	NC_GLOBAL	creator_email	String	info at bco-dmo.org
attribute	NC_GLOBAL	creator_name	String	BCO-DMO
attribute	NC_GLOBAL	creator_url	String	https://www.bco-dmo.org/
attribute	NC_GLOBAL	doi	String	10.26008/1912/bco-dmo.995681.1
attribute	NC_GLOBAL	infoUrl	String	https://osprey.bco-dmo.org/dataset/995681
attribute	NC_GLOBAL	institution	String	BCO-DMO
attribute	NC_GLOBAL	license	String	The data may be used and redistributed for free but is not intended for legal use, since it may contain inaccuracies. Neither the data Contributor, ERD, NOAA, nor the United States Government, nor any of their employees or contractors, makes any warranty, express or implied, including warranties of merchantability and fitness for a particular purpose, or assumes any legal liability for the accuracy, completeness, or usefulness, of this information.
attribute	NC_GLOBAL	sourceUrl	String	(local files)
attribute	NC_GLOBAL	summary	String	The mesopelagic zone is a site of strong microbially driven particle attenuation with depth and thus plays a crucial role in controlling the transfer efficiency of the ocean's biological pump. However, little quantitative information exists on the dependency of decay processes on the source material. Here we followed the decay of 14C-labeled dead particulate carbon (POC) and dissolved organic carbon (DOC) from three different phytoplankton species, and two incubations of live diatoms, in mesopelagic water over three months. Commonly used first-order kinetics failed to adequately describe the decay of organic material as rate constants varied from day to day. Over extended periods, decay rates for organic material exhibited two distinct phases, with rates in the second phase being inversely related to rates in the first phase. Microbial biomass (measured via ATP and cell counts) increased substantially during phase 1 and ebbed during phase 2. Decay rates were significantly different among the three algal sources; however, differences were even more pronounced among carbon pools and followed a distinct pattern (combined average per-day decay rates at 12 degrees Celsius): fresh DOC (0.6) > fresh POC (0.1) > live cells (0.06) > aged DOC/POC (0.01). Separation of POC into four broad biochemical fractions showed that components in the operationally defined lipid fraction contained the most degradable compounds for fresh material. Our research highlights the need to include the dynamics of the most easily digestible fractions of freshly released organic material, and live plankton resilient to digestion, in calculations of vertical carbon flux budgets. This dataset reports decay rates for particulate organic carbon (POC) and its biochemical fractions including proteins, polysaccharides, lipids, and low molecular weight compounds from mesopelagic decay experiments using three 14C-labeled algae (Thalassiosira weissflogii, Tetraselmis sp., and Emiliania huxleyi). See the "Related Datasets" section for complementary datasets from the same experiments.
attribute	NC_GLOBAL	title	String	[Mesopelagic decay experiments: Biochemical decay rates] - Biochemical decay rates from mesopelagic decay experiments with Thalassiosira weissflogii, Emiliania huxleyii, and Tetraselmis sp. (Collaborative Research: Transforming Carbon in the Deep Sea)
variable	Experiment		int
attribute	Experiment	actual_range	int	2, 3
attribute	Experiment	long_name	String	Experiment
attribute	Experiment	units	String	unitless
variable	Algal_substrate		String
attribute	Algal_substrate	long_name	String	Algal_substrate
attribute	Algal_substrate	units	String	unitless
variable	Carbon_pool		String
attribute	Carbon_pool	long_name	String	Carbon_pool
attribute	Carbon_pool	units	String	unitless
variable	Interval		int
attribute	Interval	actual_range	int	1, 2
attribute	Interval	long_name	String	Interval
attribute	Interval	units	String	TBD
variable	Elapsed_days		int
attribute	Elapsed_days	actual_range	int	9, 87
attribute	Elapsed_days	long_name	String	Elapsed_days
attribute	Elapsed_days	units	String	days
variable	P_rate_flask1		float
attribute	P_rate_flask1	actual_range	float	0.001, 0.185
attribute	P_rate_flask1	long_name	String	P_rate_flask1
attribute	P_rate_flask1	units	String	per day (d-1)
variable	P_rate_flask2		float
attribute	P_rate_flask2	actual_range	float	0.008, 0.18
attribute	P_rate_flask2	long_name	String	P_rate_flask2
attribute	P_rate_flask2	units	String	per day (d-1)
variable	P_rate_flask3		float
attribute	P_rate_flask3	actual_range	float	0.002, 0.208
attribute	P_rate_flask3	long_name	String	P_rate_flask3
attribute	P_rate_flask3	units	String	per day (d-1)
variable	L_rate_flask1		float
attribute	L_rate_flask1	actual_range	float	0.003, 0.2
attribute	L_rate_flask1	long_name	String	L_rate_flask1
attribute	L_rate_flask1	units	String	per day (d-1)
variable	L_rate_flask2		float
attribute	L_rate_flask2	actual_range	float	0.001, 0.252
attribute	L_rate_flask2	long_name	String	L_rate_flask2
attribute	L_rate_flask2	units	String	per day (d-1)
variable	L_rate_flask3		float
attribute	L_rate_flask3	actual_range	float	0.003, 0.23
attribute	L_rate_flask3	long_name	String	L_rate_flask3
attribute	L_rate_flask3	units	String	per day (d-1)
variable	Poly_NA_rate_flask1		float
attribute	Poly_NA_rate_flask1	actual_range	float	6.539E-5, 0.143
attribute	Poly_NA_rate_flask1	long_name	String	Poly_na_rate_flask1
attribute	Poly_NA_rate_flask1	units	String	per day (d-1)
variable	Poly_NA_rate_flask2		float
attribute	Poly_NA_rate_flask2	actual_range	float	0.001, 0.164
attribute	Poly_NA_rate_flask2	long_name	String	Poly_na_rate_flask2
attribute	Poly_NA_rate_flask2	units	String	per day (d-1)
variable	Poly_NA_rate_flask3		float
attribute	Poly_NA_rate_flask3	actual_range	float	0.001, 0.143
attribute	Poly_NA_rate_flask3	long_name	String	Poly_na_rate_flask3
attribute	Poly_NA_rate_flask3	units	String	per day (d-1)
variable	LMW_rate_flask1		float
attribute	LMW_rate_flask1	actual_range	float	0.005, 0.146
attribute	LMW_rate_flask1	long_name	String	Lmw_rate_flask1
attribute	LMW_rate_flask1	units	String	per day (d-1)
variable	LMW_rate_flask2		float
attribute	LMW_rate_flask2	actual_range	float	4.719E-4, 0.081
attribute	LMW_rate_flask2	long_name	String	Lmw_rate_flask2
attribute	LMW_rate_flask2	units	String	per day (d-1)
variable	LMW_rate_flask3		float
attribute	LMW_rate_flask3	actual_range	float	0.011, 0.118
attribute	LMW_rate_flask3	long_name	String	Lmw_rate_flask3
attribute	LMW_rate_flask3	units	String	per day (d-1)

The information in the table above is also available in other file formats (.csv, .htmlTable, .itx, .json, .jsonlCSV1, .jsonlCSV, .jsonlKVP, .mat, .nc, .nccsv, .tsv, .xhtml) via a RESTful web service.