ERDDAP > info > bcodmo_dataset_774806

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
	set	data	graph		files	public	[Picocyanobacteria Sinking Aggregates: Excess Densities] - Excess density of sinking aggregates of xenic and axenic marine Prochlorococcus and Synechococcus from roller tank experiments conducted in 2016 and 2017 (Aggregation of Marine Picoplankton)		I   M	background			BCO-DMO	bcodmo_dataset_774806

The Dataset's Variables and Attributes

Row Type	Variable Name	Attribute Name	Data Type	Value
attribute	NC_GLOBAL	access_formats	String	.htmlTable,.csv,.json,.mat,.nc,.tsv
attribute	NC_GLOBAL	acquisition_description	String	Cultures of Synechococcus WH8102 (axenic), Synechococcus WH7805 (xenic) and Prochlorococcus marinus MED4 (xenic and axenic) were incubated in 1.25 L roller tanks for 7 days in the dark at 3.5 RPM (for further details on roller tanks, see Shanks and Edmondson, 1989). Aggregation was tested with and without the addition of kaolinite clay. All treatments had n = 2 tanks. Aggregates formed were quantified, sized, and their sinking velocities and excess densities determined. Aggregation was tested with and without the addition of kaolinite clay (control, 0.5 mg per L of kaolinite clay, 5.0 mg per L of kaolinite clay)
attribute	NC_GLOBAL	awards_0_award_nid	String	710238
attribute	NC_GLOBAL	awards_0_award_number	String	OCE-1658527
attribute	NC_GLOBAL	awards_0_data_url	String	http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=1658527
attribute	NC_GLOBAL	awards_0_funder_name	String	NSF Division of Ocean Sciences
attribute	NC_GLOBAL	awards_0_funding_acronym	String	NSF OCE
attribute	NC_GLOBAL	awards_0_funding_source_nid	String	355
attribute	NC_GLOBAL	awards_0_program_manager	String	David L. Garrison
attribute	NC_GLOBAL	awards_0_program_manager_nid	String	50534
attribute	NC_GLOBAL	cdm_data_type	String	Other
attribute	NC_GLOBAL	comment	String	Picocyanobacteria Sinking Aggregates: Excess Densities PI: Susanne Neuer Data Version 1: 2019-08-14
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_type	String	institution
attribute	NC_GLOBAL	creator_url	String	https://www.bco-dmo.org/
attribute	NC_GLOBAL	data_source	String	extract_data_as_tsv version 2.3 19 Dec 2019
attribute	NC_GLOBAL	date_created	String	2019-08-07T17:17:28Z
attribute	NC_GLOBAL	date_modified	String	2019-12-24T16:40:22Z
attribute	NC_GLOBAL	defaultDataQuery	String	&time<now
attribute	NC_GLOBAL	doi	String	10.1575/1912/bco-dmo.774806.1
attribute	NC_GLOBAL	infoUrl	String	https://www.bco-dmo.org/dataset/774806
attribute	NC_GLOBAL	institution	String	BCO-DMO
attribute	NC_GLOBAL	keywords	String	0mg, 5mg, aggregate, Aggregate_Excess_Density_0_5mg_Lkaolinite1, Aggregate_Excess_Density_0_5mg_Lkaolinite2, Aggregate_Excess_Density_5_0mg_Lkaolinite1, Aggregate_Excess_Density_5_0mg_Lkaolinite2, Aggregate_Excess_Density_Control1, Aggregate_Excess_Density_Control2, bco, bco-dmo, biological, chemical, control1, control2, culture, data, dataset, density, dmo, erddap, excess, lkaolinite1, lkaolinite2, management, oceanography, office, preliminary
attribute	NC_GLOBAL	license	String	https://www.bco-dmo.org/dataset/774806/license
attribute	NC_GLOBAL	metadata_source	String	https://www.bco-dmo.org/api/dataset/774806
attribute	NC_GLOBAL	param_mapping	String	{'774806': {}}
attribute	NC_GLOBAL	parameter_source	String	https://www.bco-dmo.org/mapserver/dataset/774806/parameters
attribute	NC_GLOBAL	people_0_affiliation	String	Arizona State University
attribute	NC_GLOBAL	people_0_affiliation_acronym	String	ASU
attribute	NC_GLOBAL	people_0_person_name	String	Susanne Neuer
attribute	NC_GLOBAL	people_0_person_nid	String	51336
attribute	NC_GLOBAL	people_0_role	String	Principal Investigator
attribute	NC_GLOBAL	people_0_role_type	String	originator
attribute	NC_GLOBAL	people_1_affiliation	String	Arizona State University
attribute	NC_GLOBAL	people_1_affiliation_acronym	String	ASU
attribute	NC_GLOBAL	people_1_person_name	String	Bianca N. Cruz
attribute	NC_GLOBAL	people_1_person_nid	String	774775
attribute	NC_GLOBAL	people_1_role	String	Student
attribute	NC_GLOBAL	people_1_role_type	String	related
attribute	NC_GLOBAL	people_2_affiliation	String	Arizona State University
attribute	NC_GLOBAL	people_2_affiliation_acronym	String	ASU
attribute	NC_GLOBAL	people_2_person_name	String	Susanne Neuer
attribute	NC_GLOBAL	people_2_person_nid	String	51336
attribute	NC_GLOBAL	people_2_role	String	Contact
attribute	NC_GLOBAL	people_2_role_type	String	related
attribute	NC_GLOBAL	people_3_affiliation	String	Woods Hole Oceanographic Institution
attribute	NC_GLOBAL	people_3_affiliation_acronym	String	WHOI BCO-DMO
attribute	NC_GLOBAL	people_3_person_name	String	Amber York
attribute	NC_GLOBAL	people_3_person_nid	String	643627
attribute	NC_GLOBAL	people_3_role	String	BCO-DMO Data Manager
attribute	NC_GLOBAL	people_3_role_type	String	related
attribute	NC_GLOBAL	project	String	Marine Plankton Aggregation
attribute	NC_GLOBAL	projects_0_acronym	String	Marine Plankton Aggregation
attribute	NC_GLOBAL	projects_0_description	String	NSF abstract: Marine phytoplankton are microscopic algae that live in the sunlit zone of the ocean. They play an important role in the uptake of carbon dioxide from the atmosphere through photosynthesis, similar to what plants do on land, and are the basis of the marine food web. However, instead of storing this organic carbon in leaf tissue and roots, marine phytoplankton are grazed by planktonic animals, or die and subsequently sink out of the sunlit zone in the form of aggregates, also called "Marine Snow". These particles not only export the organic carbon contained in their cells to the deep ocean, but also serve as food for animals and bacteria that live in the deep. A considerable portion of these phytoplankton are extremely small, among the tiniest of all organisms known. These extremely small cells have not been thought to play an important role in the formation and sinking of marine snow; however, recent findings challenge this view. This project will investigate how the smallest of these phytoplankton contribute to the rain of sinking particles from the sunlit surface to the deep ocean. This research is important because, in some of the largest expanses of the open oceans, these minute cells dominate the phytoplankton community, and larger plankton organisms are very sparse. The project, through a combination of work in the laboratory and at a field station, will shed light on how these tiny phytoplankton cells make aggregates, which ultimately enable them to sink as "Marine Snow". The project also provides unique opportunities for undergraduate students at Arizona State University, a land-locked public university, to gain experience in working with marine research. The project will serve to educate one PhD student, one MS student in an accelerated BS-MS program, and 8-10 undergraduate students/semester in a unique, inquiry based learning effort termed Microbial EducatioN Training and OutReach (MENTOR). The undergraduate students will also participate in Arizona State University (ASU)'s School of Life Sciences, Undergraduate Research Program (SOLUR), which seeks to increase the participation of minorities in science. They will also contribute towards developing web and classroom materials, based on this project, which will then be distributed through a partnership with the award-winning ASU-sponsored Ask A Biologist K-12 web site. The oceanic "biological carbon pump", the photosynthetically mediated transformation of dissolved inorganic carbon into particulate and dissolved organic carbon and its subsequent export to deep water, functions as a significant driver of atmospheric carbon uptake by the oceans. The traditional view of the biological carbon pump in the ocean is that of sinking of large aggregates (marine snow) or fecal pellets, which are made up of large, mineral ballasted cells of phytoplankton. However, recent evidence, stemming from in situ investigations of particulate matter, trap studies and modelling studies, have shown that micron-sized phytoplankton such as picocyanobacteria as well as picoeukaryotes can contribute significantly to the sinking of particulate matter. The specific mechanisms behind the sinking of these micrometer sized cells remain elusive as the cells are too small to sink on their own, and mesozooplankton is likely unable to ingest single cells. Intriguingly, recent research by the investigators has shown that the ubiquitous picocyanobacteria Synechococcus are able to form aggregates and sink at velocities comparable to those of marine snow. They found that the matrix of the Synechococcus aggregates was made of Transparent Exopolymeric Particles (TEP), and that TEP production was enhanced under nutrient limited culture conditions. Interaction with clays and presence of heterotrophic bacteria also enhanced aggregation and sinking velocity. This study aims to further investigate aggregation of other common picoplankton in the laboratory and aggregation occurring in natural settings at an oligotrophic open ocean site, the Bermuda Atlantic Time-series Site (BATS). Ultimately, this project will increase and refine our understanding of the role of the smallest phytoplankton in aggregation and sinking - information vital to understanding carbon cycling processes in the oceans.
attribute	NC_GLOBAL	projects_0_end_date	String	2020-02
attribute	NC_GLOBAL	projects_0_geolocation	String	Bermuda Atlantic Time-Series station
attribute	NC_GLOBAL	projects_0_name	String	Aggregation of Marine Picoplankton
attribute	NC_GLOBAL	projects_0_project_nid	String	710239
attribute	NC_GLOBAL	projects_0_start_date	String	2017-03
attribute	NC_GLOBAL	publisher_name	String	Biological and Chemical Oceanographic Data Management Office (BCO-DMO)
attribute	NC_GLOBAL	publisher_type	String	institution
attribute	NC_GLOBAL	sourceUrl	String	(local files)
attribute	NC_GLOBAL	standard_name_vocabulary	String	CF Standard Name Table v55
attribute	NC_GLOBAL	subsetVariables	String	Aggregate_Excess_Density_Control1,Aggregate_Excess_Density_Control2,Aggregate_Excess_Density_0_5mg_Lkaolinite1,Aggregate_Excess_Density_0_5mg_Lkaolinite2
attribute	NC_GLOBAL	summary	String	Excess density of sinking aggregates of xenic and axenic marine Prochlorococcus and Synechococcus from roller tank experiments conducted in 2016 and 2017.
attribute	NC_GLOBAL	title	String	[Picocyanobacteria Sinking Aggregates: Excess Densities] - Excess density of sinking aggregates of xenic and axenic marine Prochlorococcus and Synechococcus from roller tank experiments conducted in 2016 and 2017 (Aggregation of Marine Picoplankton)
attribute	NC_GLOBAL	version	String	1
attribute	NC_GLOBAL	xml_source	String	osprey2erddap.update_xml() v1.3
variable	Culture		String
attribute	Culture	bcodmo_name	String	sample_descrip
attribute	Culture	description	String	Culture name
attribute	Culture	long_name	String	Culture
attribute	Culture	units	String	unitless
variable	Aggregate_Excess_Density_Control1		double
attribute	Aggregate_Excess_Density_Control1	_FillValue	double	NaN
attribute	Aggregate_Excess_Density_Control1	bcodmo_name	String	unknown
attribute	Aggregate_Excess_Density_Control1	description	String	Aggregate excess density. Treatment = Control, replicate 1, no kaolinite clay.
attribute	Aggregate_Excess_Density_Control1	long_name	String	Aggregate Excess Density Control1
attribute	Aggregate_Excess_Density_Control1	units	String	grams per milliliter (g/mL)
variable	Aggregate_Excess_Density_Control2		double
attribute	Aggregate_Excess_Density_Control2	_FillValue	double	NaN
attribute	Aggregate_Excess_Density_Control2	bcodmo_name	String	unknown
attribute	Aggregate_Excess_Density_Control2	description	String	Aggregate excess density. Treatment = Control, replicate 2, no kaolinite clay.
attribute	Aggregate_Excess_Density_Control2	long_name	String	Aggregate Excess Density Control2
attribute	Aggregate_Excess_Density_Control2	units	String	grams per milliliter (g/mL)
variable	Aggregate_Excess_Density_0_5mg_Lkaolinite1		double
attribute	Aggregate_Excess_Density_0_5mg_Lkaolinite1	_FillValue	double	NaN
attribute	Aggregate_Excess_Density_0_5mg_Lkaolinite1	bcodmo_name	String	unknown
attribute	Aggregate_Excess_Density_0_5mg_Lkaolinite1	description	String	Aggregate excess density. Treatment = concentration of 0.5 mg per L of kaolinite clay, replicate 1.
attribute	Aggregate_Excess_Density_0_5mg_Lkaolinite1	long_name	String	Aggregate Excess Density 0 5mg Lkaolinite1
attribute	Aggregate_Excess_Density_0_5mg_Lkaolinite1	units	String	grams per milliliter (g/mL)
variable	Aggregate_Excess_Density_0_5mg_Lkaolinite2		double
attribute	Aggregate_Excess_Density_0_5mg_Lkaolinite2	_FillValue	double	NaN
attribute	Aggregate_Excess_Density_0_5mg_Lkaolinite2	bcodmo_name	String	unknown
attribute	Aggregate_Excess_Density_0_5mg_Lkaolinite2	description	String	Aggregate excess density. Treatment = concentration of 0.5 mg per L of kaolinite clay, replicate 2.
attribute	Aggregate_Excess_Density_0_5mg_Lkaolinite2	long_name	String	Aggregate Excess Density 0 5mg Lkaolinite2
attribute	Aggregate_Excess_Density_0_5mg_Lkaolinite2	units	String	grams per milliliter (g/mL)
variable	Aggregate_Excess_Density_5_0mg_Lkaolinite1		double
attribute	Aggregate_Excess_Density_5_0mg_Lkaolinite1	_FillValue	double	NaN
attribute	Aggregate_Excess_Density_5_0mg_Lkaolinite1	actual_range	double	6.17452E-4, 0.017690599
attribute	Aggregate_Excess_Density_5_0mg_Lkaolinite1	bcodmo_name	String	unknown
attribute	Aggregate_Excess_Density_5_0mg_Lkaolinite1	description	String	Aggregate excess density. Treatment = concentration of 5.0 mg per L of kaolinite clay, replicate 1.
attribute	Aggregate_Excess_Density_5_0mg_Lkaolinite1	long_name	String	Aggregate Excess Density 5 0mg Lkaolinite1
attribute	Aggregate_Excess_Density_5_0mg_Lkaolinite1	units	String	grams per milliliter (g/mL)
variable	Aggregate_Excess_Density_5_0mg_Lkaolinite2		double
attribute	Aggregate_Excess_Density_5_0mg_Lkaolinite2	_FillValue	double	NaN
attribute	Aggregate_Excess_Density_5_0mg_Lkaolinite2	actual_range	double	0.001703006, 0.013341896
attribute	Aggregate_Excess_Density_5_0mg_Lkaolinite2	bcodmo_name	String	unknown
attribute	Aggregate_Excess_Density_5_0mg_Lkaolinite2	description	String	Aggregate excess density. Treatment = concentration of 5.0 mg per L of kaolinite clay, replicate 2.
attribute	Aggregate_Excess_Density_5_0mg_Lkaolinite2	long_name	String	Aggregate Excess Density 5 0mg Lkaolinite2
attribute	Aggregate_Excess_Density_5_0mg_Lkaolinite2	units	String	grams per milliliter (g/mL)

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.