ERDDAP > info > bcodmo_dataset_995456_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: bulk 14C, ATP, and prokaryote and protist abundances] - Bulk percentage of 14C, ATP, prokaryote and protist abundances from mesopelagic decay experiments with Thalassiosira weissflogii, Emiliania huxleyi, and Tetraselmis sp. (Collaborative Research: Transforming Carbon in the Deep Sea)		M	background			BCO-DMO	bcodmo_dataset_995456_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.995456.1
attribute	NC_GLOBAL	infoUrl	String	https://osprey.bco-dmo.org/dataset/995456
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 includes bulk percent remaining 14C, ATP concentrations, and prokaryote and protist abundances, and instantaneous decay rate calculations from mesopelagic decay experiments using three different 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: bulk 14C, ATP, and prokaryote and protist abundances] - Bulk percentage of 14C, ATP, prokaryote and protist abundances from mesopelagic decay experiments with Thalassiosira weissflogii, Emiliania huxleyi, and Tetraselmis sp. (Collaborative Research: Transforming Carbon in the Deep Sea)
variable	Experiment		String
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	Elapsed_days		float
attribute	Elapsed_days	actual_range	float	0.0, 87.2
attribute	Elapsed_days	long_name	String	Elapsed_days
attribute	Elapsed_days	units	String	days
variable	Pcnt_14C_flask1		float
attribute	Pcnt_14C_flask1	actual_range	float	7.33, 111.8
attribute	Pcnt_14C_flask1	long_name	String	Pcnt_14c_flask1
attribute	Pcnt_14C_flask1	units	String	percent (%)
variable	Pcnt_14C_flask2		float
attribute	Pcnt_14C_flask2	actual_range	float	5.84, 115.51
attribute	Pcnt_14C_flask2	long_name	String	Pcnt_14c_flask2
attribute	Pcnt_14C_flask2	units	String	percent (%)
variable	Pcnt_14C_flask3		float
attribute	Pcnt_14C_flask3	actual_range	float	7.63, 127.59
attribute	Pcnt_14C_flask3	long_name	String	Pcnt_14c_flask3
attribute	Pcnt_14C_flask3	units	String	percent (%)
variable	Decay_1		float
attribute	Decay_1	actual_range	float	0.0, 1.346
attribute	Decay_1	long_name	String	Decay_1
attribute	Decay_1	units	String	per day (d-1)
variable	Decay_2		float
attribute	Decay_2	actual_range	float	0.0, 1.265
attribute	Decay_2	long_name	String	Decay_2
attribute	Decay_2	units	String	per day (d-1)
variable	Decay_3		float
attribute	Decay_3	actual_range	float	0.0, 1.315
attribute	Decay_3	long_name	String	Decay_3
attribute	Decay_3	units	String	per day (d-1)
variable	ATP_flask1		float
attribute	ATP_flask1	actual_range	float	0.003, 1.125
attribute	ATP_flask1	long_name	String	Atp_flask1
attribute	ATP_flask1	units	String	nM (nanomolar)
variable	ATP_flask2		float
attribute	ATP_flask2	actual_range	float	-0.007, 1.841
attribute	ATP_flask2	long_name	String	Atp_flask2
attribute	ATP_flask2	units	String	nM (nanomolar)
variable	ATP_flask3		float
attribute	ATP_flask3	actual_range	float	0.0, 2.446
attribute	ATP_flask3	long_name	String	Atp_flask3
attribute	ATP_flask3	units	String	nM (nanomolar)
variable	Prok_flask1_filter1		float
attribute	Prok_flask1_filter1	actual_range	float	16100.0, 1830000.0
attribute	Prok_flask1_filter1	long_name	String	Prok_flask1_filter1
attribute	Prok_flask1_filter1	units	String	cells per milliliter (cells ml-1)
variable	Prok_flask2_filter1		float
attribute	Prok_flask2_filter1	actual_range	float	49300.0, 1650000.0
attribute	Prok_flask2_filter1	long_name	String	Prok_flask2_filter1
attribute	Prok_flask2_filter1	units	String	cells per milliliter (cells ml-1)
variable	Prok_flask3_filter1		float
attribute	Prok_flask3_filter1	actual_range	float	53600.0, 1260000.0
attribute	Prok_flask3_filter1	long_name	String	Prok_flask3_filter1
attribute	Prok_flask3_filter1	units	String	cells per milliliter (cells ml-1)
variable	Prok_flask1_filter2		float
attribute	Prok_flask1_filter2	actual_range	float	139000.0, 753000.0
attribute	Prok_flask1_filter2	long_name	String	Prok_flask1_filter2
attribute	Prok_flask1_filter2	units	String	cells per milliliter (cells ml-1)
variable	Prok_flask2_filter2		float
attribute	Prok_flask2_filter2	actual_range	float	229000.0, 1330000.0
attribute	Prok_flask2_filter2	long_name	String	Prok_flask2_filter2
attribute	Prok_flask2_filter2	units	String	cells per milliliter (cells ml-1)
variable	Prok_flask3_filter2		float
attribute	Prok_flask3_filter2	actual_range	float	160000.0, 1090000.0
attribute	Prok_flask3_filter2	long_name	String	Prok_flask3_filter2
attribute	Prok_flask3_filter2	units	String	cells per milliliter (cells ml-1)
variable	Prot_flask1		float
attribute	Prot_flask1	actual_range	float	0.0, 2820.94
attribute	Prot_flask1	long_name	String	Prot_flask1
attribute	Prot_flask1	units	String	cells per milliliter (cells ml-1)
variable	Prot_flask2		float
attribute	Prot_flask2	actual_range	float	0.0, 6488.15
attribute	Prot_flask2	long_name	String	Prot_flask2
attribute	Prot_flask2	units	String	cells per milliliter (cells ml-1)
variable	Prot_flask3		float
attribute	Prot_flask3	actual_range	float	0.0, 803.97
attribute	Prot_flask3	long_name	String	Prot_flask3
attribute	Prot_flask3	units	String	cells per milliliter (cells ml-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.