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Arctic LTER Database

Acceptance and utilization of LTER data requires that:

(1) The Principal Investigator be sent a notice stating reasons for acquiring any data and a description of the publication intentions.
(2) The Principal Investigator of the data set be sent a copy of the report or manuscript prior to submission and be adequately cited in any resultant publications.
(3) A copy of any resultant publications should be sent to:

Principal Investigator
Ecosystems Center
Marine Biological Laboratory
7 MBL St.
Woods Hole, MA 02543

Older Metadata: Attribute table not in XML (EML) file

Dataset URLs:	METADATA: HTML, Rich Text, XML(EML compliant) DATA: Comma Delimited, Excel file with Metadata and data
Dataset ID:	92bomocb
Dataset Title:	Cover biomass measurements used to estimate bryophyte biomass in the Kuparuk River, Arctic LTER 1992.
Investigator 1:
First Name:	William
Last Name:	Bowden
Address line 1:
Address line 2:
Address line 3:
City:
State:
Zip Code:
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Associate Investigators:	Jacques Finlay
Keywords:	Kuparuk River, fertilized, bryophytes, biomass, riffle, Hygrohypnum, Schistidium
Abstract:	Cover biomass measurements used to estimate bryophyte biomass in the Kuparuk River. Hygrohypnum and Schistidium were the only bryophytes harvested for this measurement from the Kuparuk River's fertilized reach. Harvests were done in August
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 Name	92bomocb
Beginning Date	5/1/1992
End Date	9/1/1992
Number of Data Records
Other Files to Reference
Availability Status
Quality Control Information
Maintenance Description
Log of Changes:	Log of changes: For Archival Use: DATE RECEIVED: June 1997 DATA FILE ENTERED BY: Karie Slavik DATA FILE VALIDATION: NAME: Karie Slavik DATE: 03Sept97



RESEARCH LOCATION:
Geographic Description	Kuparuk River: Fertilized: riffle 1.7 to 4.0 km
Location Bounding Box
West Bounding Coordinate
East Bounding Coordinate
North Bounding Coordinate
South Bounding Coordinate
OR if single point location
Latitude
Longitude



TAXONOMIC COVERAGE:
Organisms studied

Methods:	In 1990 we observed increased abundance's of several species of aquatic bryophytes in the fertilized zone of the Kuparuk River relative to the reference. These bryophytes included, most notably, two species of Hygrohypnum, H. alpestre and H. ochraceum, Fontinalis neomexicana, and, to a lesser extent, Schistidium agassizii and the leafy liverwort Solenostoma. To substantiate these data, we utilized point transects in 1992 to estimate bryophyte coverage in the enriched and control zones. To estimate percent coverage, we normally completed 5 transects per riffle site. In order to estimate the total biomass of Hygrohypnum and Schistidium in the Kuparuk River we performed a biomass harvest which entailed harvesting these bryophytes from a known area at different coverage percentages. The result was a slide rule scale that could be used to determine the biomass of either species at differing percent covers. We developed a relationship between percent benthic cover and biomass (gdw/m2) for both of the bryophyte species. Methods used to determine this relationship were reported in Bowden et al. (1994). A 0.25 m2 plot was selectively placed in a riffle at station +1.7, 2.0 or 4.0 km. The harvest occurred in the late summer (4-August), at peak seasonal biomass. All material collected was rinsed to remove detritus and invertebrates and then dried at 65 oC to a consistent weight. Dry mass of each species was recorded for each percent cover category. The harvested biomass was converted to a per meter value by multiplying by 4. Calculations: None Reference Citations: Bowden, W. B., J. C. Finlay, and P. E. Maloney. 1994. Long-term effects of PO4 fertilization on the distribution of bryophytes in an arctic river. Freshwater Biology 32:445-454. Finlay, J. C. and W. B. Bowden. 1994. Controls on production of bryophytes in an arctic tundra stream. Freshwater Biology 32:455-466. Sampling Description. None

Data Table

Precise                                      Coded?
Variable      Variable description          Units           (Y/N)
SITE          site of measurement                               y
D/D           distance from K or O dripper  0.05 km             n
DATE          date                          ddmmyy              n
LOCATION      location (REF, FERT)                              n
SUBSITE       typically POOL or RIFFLE                          n
TYPE          community description                             n
PLOT#         assigned harvest number                           n
%COVER        estimated coverage in plot       %                n
BIOMASS       calculated biomass            gdw/m2              n