Arctic LTER Database

Conditions of Use

The re-use of scientific data has the potential to greatly increase communication, collaboration and synthesis within and among disciplines, and thus is fostered, supported and encouraged. Permission to use this dataset is granted to the Data User free of charge subject to the following terms:

1) Acceptable use. Use of the dataset will be restricted to academic, research, educational, government, recreational, or other not-for-profit professional purposes. The Data User is permitted to produce and distribute derived works from this dataset provided that they are released under the same license terms as those accompanying this Data Set. Any other uses for the Data Set or its derived products will require explicit permission from the dataset owner.
2 ) Redistribution. The data are provided for use by the Data User. The metadata and this license must accompany all copies made and be available to all users of this Data Set. The Data User will not redistribute the original Data Set beyond this collaboration sphere.
3 ) Citation. It is considered a matter of professional ethics to acknowledge the work of other scientists. Thus, the Data User will properly cite the Data Set in any publications or in the metadata of any derived data products that were produced using the Data Set. Citation should take the following general form: Creator, Year of Data Publication, Title of Dataset, Publisher, Dataset identifier. For example:

Shaver, G. 1989. Above ground biomass in acidic tussock tundra experimental site, 1989, Arctic LTER, Toolik, Alaska. Arctic LTER, Marine Biological Lab, Woods Hole, Ma 02543. 1989gsttbm http://ecosystems.mbl.edu/arc/terrest/biomass/index.shtml 

4 ) Acknowledgement. The Data User should acknowledge any institutional support or specific funding awards referenced in the metadata accompanying this dataset in any publications where the Data Set contributed significantly to its content. Acknowledgements should identify the supporting party, the party that received the support, and any identifying information such as grant numbers. For example:

Data sets were provided by the Arctic LTER. This material is based upon work supported by the National Science Foundation under Grants #DEB-981022, 9211775, 8702328; #OPP-9911278, 9911681, 9732281, 9615411, 9615563, 9615942, 9615949, 9400722, 9415411, 9318529; #BSR 9019055, 8806635, 8507493.

5 ) Notification. The Data User will notify the Data Set Contact when any derivative work or publication based on or derived from the Data Set is distributed. The Data User will provide the data contact with two reprints of any publications resulting from use of the Data Set and will provide copies, or on-line access to, any derived digital products. Notification will include an explanation of how the Data Set was used to produce the derived work.
6 ) Collaboration. The Data Set has been released in the spirit of open scientific collaboration. Data Users are thus strongly encouraged to consider consultation, collaboration and/or co-authorship with the Data Set Creator.

By accepting this Data Set, the Data User agrees to abide by the terms of this agreement. The Data Owner shall have the right to terminate this agreement immediately by written notice upon the Data User's breach of, or non-compliance with, any of its terms. The Data User may be held responsible for any misuse that is caused or encouraged by the Data User's failure to abide by the terms of this agreement.

Disclaimer

While substantial efforts are made to ensure the accuracy of data and documentation contained in this Data Set, complete accuracy of data and metadata cannot be guaranteed. All data and metadata are made available "as is". The Data User holds all parties involved in the production or distribution of the Data Set harmless for damages resulting from its use or interpretation.

Dataset URLs:	METADATA: HTML, Rich Text, XML(EML compliant) DATA: Comma Delimited, Excel file with Metadata and data
Dataset ID:	2009sedtrp.02
Dataset Title:	Sedimentation rate, concentration of macronutrients and flux for NE14, Toolik, Dimple, Perched during Summer 2009.
Investigator 1:
First Name:	Cody
Last Name:	Johnson
Organization:
Address line 2:	Institute of Arctic Biology
Address line 3:	900 Yukon Drive
City:	Fairbanks
State:	AK
Zip Code:	99775
Country:	United States of America
Investigator 2:
First Name:	George
Last Name:	Kling
Address line 2:	Department of Ecology and Evolutionary Biology
Address line 3:	830 North University
City:	Ann Arbor
State:	MI
Zip Code:	48109-1048
Country:	United States of America
Investigator 3:
First Name:	Anne
Last Name:	Giblin
Address line 2:	Ecosystems Center
Address line 3:	7 MBL Street
City:	Woods Hole
State:	MA
Zip Code:	02543
Country:	United States of America
Investigator 4:
First Name:	Shiloh
Last Name:	Schlung
Address line 2:
Address line 3:
City:
State:
Zip Code:
Country:
Investigator 5:
First Name:	Jen
Last Name:	Kosrzewski
Investigator 6:
First Name:	Jason
Last Name:	Dobkowski
Investigator 7:
First Name:	Daniel
Last Name:	White
Investigator 8:
First Name:	Elissa
Last Name:	Schuett
Associate Investigators:
Keywords:	sedimentation, carbon, nitrogen, phosphorus, fluxes, organic matter
Abstract:	We measured the flux of bulk material and major macronutrients (carbon, nitrogen and phosphorus) from the water column to the benthos in four separate lakes during the summer of 2009. The lakes were chosen to investigate the impacts of disturbance on lake sedimentation. Two of the lakes, Dimple and Perched, were within catchments that were burned by the 2007 Anaktuvuk River wildfire. Two of the lakes, NE-14 and Perched, were receiving elevated sediment loads from thermokarst failures on their shorelines, and Toolik Lake was used as a reference lake. As such, the lakes were organized by disturbance regime: Dimple = fire only, Perched = fire + thermokarst, NE-14 = thermokarst only, and Toolik = undisturbed reference.
For questions about the Metadata and data contact the Investigators. For information about this web site contact:	Arctic LTER Information Manager The Ecosystems Center Marine Biological Lab 7 MBL St Woods Hole, MA 02543 Phone (508) 289 7496 Email: arc_im@mbl.edu Online URL: http://ecosystems.mbl.edu/ARC/
DATA FILE INFORMATION:
Data File URL	http://metacat.lternet.edu/das/dataAccessServlet?docid=knb-lter-arc.10114&urlTail=lakes/physchem/data/2009BurnSedTrp.csv
Data File Name	2009BurnSedTrp.xls
Beginning Date	6/7/2009
End Date	8/11/2009
Number of Data Records	71
Other Files to Reference
Availability Status	Type 1
Quality Control Information
Maintenance Description
Log of Changes:	30Nov2010- combined metadata and data pages to one file and renamed file, 30Nov2010- added abstract, methods, keywords
	Version 2: Updated to newer metadata sheet (with sites). CH March 2013.

RESEARCH LOCATION:
Location Name	NE 14	Toolik	Dimple Lake	Perched Lake	Select Site or enter New One	Select Site or enter New One	Select Site or enter New One	Select Site or enter New One
Geographic Description	Lake NE-14	Toolik Lake	Dimple Lake	Perched Lake	Enter Description	Enter Description	Enter Description	Enter Description
Location Bounding Box
West Bounding Coordinate
East Bounding Coordinate
North Bounding Coordinate
South Bounding Coordinate
OR if single point location
Latitude	68.6833333333333	68.629961	68.951483333	68.941266667	In Decimal Degrees	In Decimal Degrees	In Decimal Degrees	In Decimal Degrees
Longitude	-149.616666666667	-149.612633	-150.194333333	-150.5068	In Decimal Degrees	In Decimal Degrees	In Decimal Degrees	In Decimal Degrees
Elevation	701	719	399	408	In Meters	In Meters	In Meters	In Meters
Link to Google Map	View on Google Map	View on Google Map	View on Google Map	View on Google Map

TAXONOMIC COVERAGE:
Organisms studied
Methods:	In each lake, NE-14, Toolik, Dimple and Perched, we deployed two clusters of three sediment traps at a depth of approximately 5 m. Each sediment trap cluster consisted of three 9 cm diameter tubes suspended vertically in the water column approximately 1 m from the bottom of the lake. A single float rope extending from the center of each sediment trap cluster to the surface of the lake marked the location of the trap. During the summer of 2009 sediment trap clusters were initially deployed in the lakes listed above from early to mid June. Sediment trap clusters were allowed to collect material precipitating out of the water column for durations of 2 to 3 weeks based on how frequently the individual lakes could be accessed with helicopter support. Traps were sampled by carefully raising the trap cluster to the surface and pouring the contents of each sediment trap into a separate 4 L cubitainer. Once each trap was sampled the entire cluster was immediately redeployed at roughly the same location in approximately 5 m of water. Once collected, we returned the water to Toolik Field Station and forced aliquots through precombusted (500 degrees Celsius for 2 hours), 0.7 micrometer pore size, glass fiber filters for the analysis of percent organic matter, concentrations of particulate carbon, nitrogen and phosphorus, concentrations chlorophyll a and pheophytin, and stable isotopes carbon-13 and nitrogen-15. For analytical methods see ‘Protocols of the Arctic Lakes LTER' http://ecosystems.mbl.edu/ARC/lakes/protocols.html on the Arctic LTER webpage. We calculated bulk sedimentation rate as well as carbon, nitrogen and phosphorus flux rate (mg m-2 d-1) by first measuring the mass of bulk particulate matter and macronutrients carbon, nitrogen and phosphorus in each trap (mg), and then dividing by the area of the trap (m2) and the duration that the trap was deployed (d).

Data Table

Variable Name	Variable Description	Data Type	Units	DateTime Format	Code Information	Missing Value Code
Location	lake in which trap was deployed	text
Cluster	trap cluster deployed in lake	text
Trap	individual trap within cluster	text
Date Deployed	date in which trap was deployed	datetime		DD-MMM-YY
Date Collected	date in which trap was sampled	datetime		DD-MMM-YY
Length of Deployment	duration in which trap was deployed and collecting sediments	number	number			.=Missing or Not Measured
Sedimentation Rate	rate at which bulk material sedimented out of the water column	number	milligramPerMeterSquaredPerDay			.=Missing or Not Measured
Percent organic matter	percent of bulk sediment that was organic as determined by loss on ignition	number	percent			.=Missing or Not Measured
Particulate carbon	concentration of particulate carbon in bulk sediment	number	microgramPerLiter			.=Missing or Not Measured
Particulate nitrogen	concentration of particulate nitrogen in bulk sediment	number	microgramPerLiter			.=Missing or Not Measured
Particulate phosphorus	concentration of particulate phosphorus in bulk sediment	number	micromolePerLiter			.=Missing or Not Measured
Chlorophyll a	concentration of chlorophyll a in bulk sediment	number	microgramPerLiter			.=Missing or Not Measured
Pheophytin	concentration of phaeophytin in bulk sediment	number	microgramPerLiter			.=Missing or Not Measured
delta 13C	del carbon-13 of bulk sediment	number	partPerThousand			.=Missing or Not Measured
delta 15N	del nitrogen-15 of bulk sediment	number	partPerThousand			.=Missing or Not Measured
carbon flux	flux of particulate carbon from water column to benthos	number	milligramPerMeterSquaredPerDay			.=Missing or Not Measured
nitrogen flux	flux of particulate nitrogen from water column to benthos	number	milligramPerMeterSquaredPerDay			.=Missing or Not Measured
phosphorus flux	flux of particulate phosphorus from water column to benthos	number	milligramPerMeterSquaredPerDay			.=Missing or Not Measured
	Please contact arc_im@mbl.edu with questions, comments, or for technical assistance regarding this web site.