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Arctic LTER Database

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 

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.


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 via LTER Data Portal
Dataset ID:2003-2011ArcLTERZoops.04
Dataset Title:Zooplankton density for all samples collected from Toolik Lake and lakes near the Toolik Field Station, Arctic LTER 2003 - 2010.
Investigator 1: 
First Name:Chris
Last Name:Luecke
Organization:Department of Watershed Sciences
Address line 2:Utah State University
Address line 3:
Zip Code:84322-5210
Investigator 2: 
First Name:John
Last Name:O'Brien
Organization:University of North Carolina-Greensboro
Address line 2:Deceased
Zip Code:
Associate Investigators:
Keywords:zooplankton, lakes, ponds, populations, arctic lakes
Abstract:Zooplankton density,were taken with a 30 cm diameter plankton net with 156 um mesh plankton netting, for all samples collected from Toolik Lake and lakes near the Toolik Field Station, Arctic LTER from 2003 - 2010
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
Online URL:
Data File URL
Data File Name 2003-2011ArcLTERZoops.csv
Beginning Date 6/18/2003
End Date 8/10/2011
Number of Data Records 842
Other Files to Reference
Availability Status Type 1
Quality Control Information Data are screened for outliers and then compared to printed data sheets for acuracy prior to posting on web site.
Maintenance Description Additional years are posted in different datasets
Log of Changes: Updated Metadata sheet
Version 2 received to 2011 data JimL Jun2013
Version 3: Checked keywords against the LTER network preferred list and replaced non-preferred terms. Jim L 27Jan14
Version 4: Changed Distrubution URL since the LTER network DAS system is being discontinued. JimL 9Apr2015
RESEARCH LOCATION:                                                        
Location Name Toolik N 01 N 02 S 06 I1 I2 I3 I4 I5 I6 I7 I8 I Swamp Green Cabin Lake E 05 E 01 S 07 S 11 Fog Lake 2 Fog Lake 4 NE 9B LTER 338 I Minus E 06 I6 Headwater Lake      
Geographic Description Toolik Lake Main Station Arctic LTER Site number 103 Arctic LTER Site number 104 Arctic LTER Site number 107 Arctic LTER Site number 111 Arctic LTER Site number 112 Arctic LTER Site number 113 Arctic LTER Site number 114 Arctic LTER Site number 115 Arctic LTER Site number 116 Arctic LTER Site number 117 Arctic LTER Site number 118 Arctic LTER Site number 120 Headwater Lake of the Kupurak River Arctic LTER Site number 145 Arctic LTER Site number 146 Arctic LTER Site number 152 Arctic LTER Site number 156 Arctic LTER Site number 165 Arctic LTER Site number 167 Arctic LTER Site number 171 Lake is called LTER 338 and GTH 50 Arctic LTER Site number 388 Arctic LTER Site number 399 Arctic LTER Site number 431 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 68.629961 68.6398939358 68.6409472345 68.6293797816 68.5687130789 68.5713195633 68.5755366301 68.57956715 68.5873874391 68.5965924039 68.6008747982 68.6101575207 68.610781 68.53698 68.642611 68.6261956028 68.6300627447 68.630148049 68.6833333333333 68.68 68.6526454831 68.5223959266 68.55634 68.6434270583 68.582062 In Decimal Degrees In Decimal Degrees  
Longitude -149.612633 -149.606965643 -149.625086307 -149.641623295 -149.58807625 -149.565881618 -149.583644456 -149.58405938 -149.589625877 -149.59264335 -149.596582063 -149.582211513 -149.600742 -149.2374 -149.458079 -149.555347706 -149.644441789 -149.650579145 -149.1 -149.071666666667 -149.599473662 -150.022605673 -149.56628 -149.440564592 -149.622932 In Decimal Degrees In Decimal Degrees  
Elevation 719 731 724 731 785 785 774 770 767 754 742 744 736 883 800 762 731 750 785 754 747   801 792 806 In Meters In Meters  
Link to Google Map View on Google Map View on Google Map View on Google Map View on Google Map View on Google Map View on Google Map View on Google Map View on Google Map View on Google Map View on Google Map View on Google Map View on Google Map View on Google Map View on Google Map View on Google Map View on Google Map View on Google Map View on Google Map View on Google Map View on Google Map View on Google Map View on Google Map View on Google Map View on Google Map View on Google Map View on Google Map View on Google Map  
Organisms studied Daphnia middendorffiana; Daphnia longiremis; Holopedium gibberum; Bosmina longirostris; Cyclops scutifer; Diaptomus pribolofensis; Heterocope septentrionalis
Methods:The samples were taken with a 30 cm diameter plankton net with 156 um mesh plankton netting. In almost all cases replicate vertical tows were taken with the length varying on the depth of the lake. Once on the lake the net is slowly lowered being sure that it goes down open side up, stopping briefly at the depth of the tow and then at about a meter per second pulling the net to the surface. The contents of the net are washed down until it will fill about half the sample bottle. It is then emptied into the labeled sample bottle. The samples were preserved in an alcohol/formalin solution and stored in 250 ml Nalgene bottles. The samples were counted by taking a subsample of 1 or 2 mL from the bottle and enumerating all zooplankton by species using a M-5 stereomicroscope. If less than 10 individuals of any taxon were recorded in the sample, the entire sample was enumerated for that taxon.
Samples were collected by members of the laboratory of W. John O'Brien from 2003-2008. From 2009-2011 samples were collected by member of the laboratory of Chris Luecke. All samples were counted and enumerated by Shannon Babb, Katie Fisher, or Heather Gooding at Utah State University.

Data Table

Variable Name Variable Description Data Type Units DateTime Format Code Information Missing Value Code
Site Arctic LTER site number number      
Date Date of sample collection datetime   DD-MMM-YYYY    
Depth of tow Depth of vertical tow of 0.3 m diameter plankton net number meter      
Station number Station number in Lake text        
Daphnia midd Density of Daphnia middendorffiana in vertical tow number numberPerLiter      
Daphnia long Density of Daphnia longeremis in vertical tow number numberPerLiter      
Holopedium Density of Holopedium gibberum number numberPerLiter      
Bosmina Density of Bosmina longerostris in vertical tow number numberPerLiter      
Cyclops Density of Cyclops scutifer in vertical tow number numberPerLiter      
Diaptomus Density of Diaptomus pribilofensis in vertical tow number numberPerLiter      
Heterocope Density of Heterocope septentrionalis in vertical tow number numberPerLiter      

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