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:	1993_to_current_mopt_kup.02
Dataset Title:	Moss point transect data (1993 to current year) - Kuparuk River, Arctic LTER, Toolik Field Station, Alaska.
Investigator 1:
First Name:	William (Breck)
Last Name:	Bowden
Address line 1:	304 Aiken Center
Address line 2:	Rubenstein School of Environment and Natural Resources
Address line 3:
City:	Burlington
State:	Vermont
Zip Code:	05405
Country:	USA
Associate Investigators:	Jacques Finlay, Dave Arscott, Ken Edwardson, Morgan Greenwald, Julia Larouche, Joe Bartlett, Elissa Schuett
Keywords:	Bryophytes, mosses, algae, kuparuk, primary producers, benthos, primary production, disturbance
Abstract:	This file contains the consolidated data for percent cover of dominant bryophytes and other easily identifiable macro-algae in the experimental reaches of the Kuparuk River beginning in 1993 and updated annually. In some years percent cover was recorded more than one time per season. In all years percent cover was recorded in riffle habitats and in some (early) years percent cover was recorded for pool habitats. This file will be updated periodically with new data as it is acquired. The current date range is as indicated in the file name.
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.10051&urlTail=streams/primprod/data/1993_to_current_mopt_kup.dat
Data File Name	1993_to_current_mopt_kup
Beginning Date	6/23/1993
End Date	7/31/2009
Number of Data Records	3707
Other Files to Reference	mopt_oks.01, mopt_other.01
Availability Status	Type 1
Quality Control Information	Field technicians were trained annually by the PI or by an experienced field technician. Typically the data were recorded in the field by two individuals, usually but not always the data were transcribed to a PC by two individuals. Data transcription was checked by random sample of raw notes. Data translation and summarization was done entirely within Excel. Final summarized data were checked across sites for a year and then across years to ensure they were internaly self consistent.
Maintenance Description	Individual annual files were consolidated into this file in Novermber 2007. At this time a data check was done to ensure that the transfer was accurate. Future addtions to the the same data file should reference this metadata file, with updates as needed.
Log of Changes:	XX November 2007: Data consolidation complete and data transferred to Arctic LTER data managers for posting.
	12/29/2009 updated 2008-09 data EBS
	Version 2: Update LTERNET Data Access server proxy link for Excel and comma delimited data files. Changed from knb to das in url.

RESEARCH LOCATION:	Site 1	Site 2
Geographic Description	Kuparuk river reference, recovery, and fertilized reaches
Location Bounding Box
West Bounding Coordinate	68.748 -149.511
East Bounding Coordinate	68.599 -149.359
North Bounding Coordinate	68.748 -149.511
South Bounding Coordinate	68.599 -149.359
OR if single point location
Latitude
Longitude
Elevation

TAXONOMIC COVERAGE:
Taxonomic Protocols	Crum and Anderson (1981), Conard and Redfearn (1979), and Vitt et al. (1993), typically identified to genus
Organisms studied	Bryophytes, algae
Methods:	Study Site General description (modified from Benstead et al. 2007): Fertilization of the Kuparuk River with P (added as H3PO4 via continuous dripper from mid-June to mid-August, fixed-rate with a target concentration of 0.3 µM at a nominal discharge of 2 m3/sec) started in the summer of 1983. The H3PO4 was added at an arbitrary point called 0.0 km, located 1.6 km upstream of the river crossing at the Dalton Highway (see Peterson et al., 1985 for early results of fertilization). In subsequent years, all points on the Kuparuk River were referenced relative to this datum. In 1985 the P dripper was moved 0.59 km downstream, forming the first Kuparuk recovery reach (enriched for the two previous summers, 1983-1984) between 0.0 km and 0.59 km. In 1996 the dripper was moved downstream a second time, to 1.4 km below the original dripper site (Fig. 1). The reach between 0.59 km and 1.4 km became the second Kuparuk recovery reach (enriched for 13 consecutive summers, 1983-1995). See Slavik et al. (2004) for an summary of other relevant data the Kuparuk River long-term fertilization experiment. The specific reaches represented in this data set come from the following general areas unless noted otherwise: 1992-1995 Fertilized from 0.59km to 18km Reference from 0.5km to -9.5km 1996-2007 Fertilized from 1.6km to 6km Recovery from 1km to 1.39km Reference from -0.05 to 0.7km Sampling Methods Data were acquired using point transects (Bowden et al. 1994, Bowden et al. 2006). Typically five transects were established across the river at ever sampling station. The transect locations were not permanently monumented and so for sites that were revisited several times a year or over many years, the exact location of the transects vary somewhat. While useful information is contained in the individual transects, statistical comparisons should typically be based on the mean cover values for all transects done at a site as the fundamental reporting unit. At intervals of about 10 cm along each transect, we noted the nature of the plant cover on the cobbles. Three moss species (Schistidium [Grimmia] agassizii Sull. & Lesq. in Sull., a mixture of H. alpestre [Hedw.] Loeske and H. ochraceum [Turn.] Loeske, and Fontinalis neomexicana Sull. & Lesq.), one liverwort (Solenostoma sp.), and the macroalgae previously mentioned, could be identified easily by eye in the field and were recorded as being present or absent. In subsequent years, other easily recognizable cover categories were recorded (e.g. Lemanea spp., Phormidium spp.). Only one species was assigned to a point. For a typical river width of 15 m, each transect provided roughly 150 points or 750 points at each station. Species frequency was determined from the number of times each species was encountered, divided by the total number of points sampled in a transect. Only one species (or "bare") was recorded as present at any one point. “Bare” recordings in the field notes were assumed to consist of an epilithic biofilm of diatoms and other microalgae as reported by Miller et al. (1992) and are recorded in the database here as "Epilithic algae". In different years slightly different river sites were sometimes measured. Any measured site is a representative sample of the reach from which it came. The dataset contains the "actual" station location information. However, to consolidate the data and facilitate comparisons among reaches and across years, the data from closely co-located actual stations has been aggregated

Data Table

Variable Name	Variable Description	Units	Measurement Scale	Code Information	Number Type	DateTime Format	Missing Value Code	Missing Value Code Explanation
Year	The year in which the data were collected		datetime			yyyy
River	The river/stream from which the data were collected		nominal
Station	Location of the sampling site in relation to 1983 dripper location at 0.0km (~1.7km upstream from Dalton Highway)	kilometer	ratio		real
Nominal Station	name of station		nominal
Date	The date on which the data were collected		datetime			dd-mm-yyyy
Period	Timeframe of sample (early, mid, or late summer)		ordinal
Reach	Location of the sampling site in relation to the fertilized, recovery and reference sections of the river		nominal
Habitat	reach type		nominal
Species/Cover Type	species or cover description		nominal
Mean	average percent cover	percent	ratio		real
SE	standard error of %mean cover/species type	number	ratio		real
n	number of transects in %mean cover/species type	number	ratio		whole
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