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:	97obzoop.3
Dataset Title:	Zooplankton density for lake samples collected near Toolik Lake Arctic LTER in the summer of 1997
Investigator 1:
First Name:	John
Last Name:	O'Brien
Organization:
Address line 2:
Address line 3:
City:
State:
Zip Code:
Country:
Investigator 2:
First Name:	Christopher
Last Name:	Leucke
Associate Investigators:
Keywords:	Zooplankton species, zooplankton density, lakes and ponds.
Abstract:	Zooplankton density in number per liter for all samples collected from arctic lakes near Toolik Lake Field Station (Arctic LTER) in the summer of 1997.
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.972&urlTail=lakes/plankton/data/97obzoop.csv
Data File Name	97obzoop.xls
Beginning Date	5/1/1997
End Date	9/1/1997
Number of Data Records	147
Other Files to Reference
Availability Status
Quality Control Information
Maintenance Description
Log of Changes:	Log of changes: For Archival Use: DATE RECIEVED: March 9, 2000 DATA FILE ENTERED BY: DATA FILE VALIDATION: NAME: DATE:
	Version 3: Metadata updated to newer form (with sites sheet). Columns added to match data from other years. Data from all lakes sampled in 2001 compiled into one sheet. CH 4 Apr 2011.

RESEARCH LOCATION:

Location Name

Toolik

E 01

E 06

N 01

N 02

NE 12

NE 9B

O2

O3

S 01

S 11

S 02

S 06

S 07

Select Site or enter New One

Select Site or enter New One

Geographic Description

Toolik main station

E1

E6

N1

Lake N2; treatment and reference sides

NE12

NE9B

O2

O3

S1

S11

S2

S6

S7

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

68.6261956028

68.6434270583

68.6398939358

68.6409472345

68.65

68.6526454831

68.5833333333333

68.6

68.6245359666

68.630148049

68.6271690786

68.6293797816

68.6300627447

In Decimal Degrees

In Decimal Degrees

Longitude

-149.612633

-149.555347706

-149.440564592

-149.606965643

-149.625086307

-149.616666666667

-149.599473662

-149.2

-149.166666666667

-149.602166091

-149.650579145

-149.611352962

-149.641623295

-149.644441789

In Decimal Degrees

In Decimal Degrees

Elevation

719

762

792

731

724

699

747

892

876

720

750

720

731

731

In Meters

In Meters

Link to Google Map

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TAXONOMIC COVERAGE:
Organisms studied	Daphnia middendorfiana; Daphnia longiremis; Bosmina longirostris; Holopedium gibberum; Heterocope septentrionalis; Diaptomus pribilofensis; Cyclops scutifer; Polyphemus pedunuclus; Daphnia pulex
Methods:	The samples were taken with a 30 cm diameter plankton net with 335 um mesh plankton netting. In almost all cases replicate vertical tows were taken with the length varying on the depth of the lake. 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. All samples were counted and enumerated by . Notes: S-1, S-2, S-5, and camp pond density calculations were as follows: Density = (# counted)(bottle vol.)/(vol. counted)(tow vol.)(1000) tow volume = 0.146899 = p(net radius)2 ´ 2p(2), Net radius = 0.061 Reference Citations: None relevant to this particular data. Sampling Description. 15 lakes or locations within lakes were sampled in 1995 all coded with standard Arctic LTER site codes. 100 is Toolik lake mainstation situated in about 20 m of water in the southern part of the lake where 15m vertical tows were taken. 102 is Limno Bay of Toolik lake, the small steep-sided bay to the north of the lake. It was sampled approximately in the middle with a 5 m vertical tow. 103 is lake N-1 the large lake due north of Toolik, it was sampled in the north, deep basin with a 10 m vertical tow. 104 is lake N-2 a smaller lake due west of N-1. It is divided and the western basin fertilized. Two stations were sampled one in the treated and one in the reference both near the curtain. 108 is lake NE-12, a small lake northeast of Toolik. It was sampled in the middle with a 12 m vertical tow. 146 is lake E-1, a small lake east of Toolik camp directly across from the road into camp. It was sampled in the middle with 11 m vertical tows. 116 is lake I-6, a small lake south of Toolik in the inlet series of lakes to Toolik Lake. It was sampled in the middle with 8 m vertical tows. 118 is lake I-8, another lake in the inlet series. It was sampled in the middle with 8 m vertical tows. 107 is lake S-6 a small lake south of Toolik. It was sampled with 6 m vertical tows. 156 is lake S-11 a small but deep lake south of Toolik. It was sampled with 10 m vertical tows. 149 is lake S-2 a small very shallow lake on the south shore of Toolik Lake. It was sampled with 180 degree 2m deep plankton net sweeps. 106 is lake S-5 a small shallow lake south of Toolik. It was sampled with 180 degree 2 m deep plankton net sweeps. 148 is lake S-1, another small, shallow lake south of Toolik. It was also sample with 180 degree net sweeps. 141 is Camp pond near the old campsite pad on the northeast shore of Toolik. It was sampled with 180 degree 2 m deep plankton net sweeps.

Data Table

Variable Name	Variable Description	Data Type	Units	DateTime Format	Code Information	Missing Value Code
Lake	Lake name	text				.=Missing or Not Measured
Site Code	Arctic LTER site code	text				.=Missing or Not Measured
Treatment	Treatment	text				.=Missing or Not Measured
Tow type	Type of tow (vertical or sweep)	text				.=Missing or Not Measured
Tow Length (m)	Length of tow in meters	number	meter			.=Missing or Not Measured
Depth (m)	Depth in meters	number	meter			.=Missing or Not Measured
Date	Date of tow	datetime		DDMMMYYYY		.=Missing or Not Measured
D. midd	Daphnia middendorfiana (number per liter)	number	number			.=Missing or Not Measured
D. long	Daphnia longiremis (number per liter)	number	number			.=Missing or Not Measured
Bosmina	Bosmina longirostris (number per liter)	number	number			.=Missing or Not Measured
Holo	Holopedium gibberum (number per liter)	number	number			.=Missing or Not Measured
Heter	Heterocope septentrionalis (number per liter)	number	number			.=Missing or Not Measured
D. prib	Diaptomus pribilofensis (number per liter)	number	number			.=Missing or Not Measured
C. scutt	Cyclops scutifer (number per liter)	number	number			.=Missing or Not Measured
P. ped	Polyphemus pedunuclus (number per liter)	number	number			.=Missing or Not Measured
D. pulex	Daphnia pulex (number per liter)	number	number			.=Missing or Not Measured
Eurycercus	Eurycercus (number per liter)	number	number			.=Missing or Not Measured
Extra	Other species (number per liter)	text				.=Missing or Not Measured
Comments	Notes about data	text				.=Missing or Not Measured
	Please contact arc_im@mbl.edu with questions, comments, or for technical assistance regarding this web site.