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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:	92bomogr
Dataset Title:	Bryophyte growth data from 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:	bryophytes, Kuparuk River, Hygrohypnum spp., Fontinalis, neomexicana, control, fertilized, phosphorus, riffle, pool
Abstract:	Bryophyte growth data from the Kuparuk River. We measured growth of Hygrohypnum spp. and Fontinalis neomexicana clumps and stem tips in control and fertilized (PO4 phosphorus), pools and riffles.
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	92bomogr
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: Control: riffles and pools, 0.45 to -1.0 km Fertilized: riffles and pools, 0.5 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 control. These bryophytes included, most notably, two species of Hygrohypnum, H. alpestre and H. ochraceum, and, to a lesser extent, Fontinalis neomexicana, Schistidium agassizii and the leafy liverwort Solenostoma spp.. Bryophyte biomass collections from random quadrants in control and phosphorus-enriched zones of the Kuparuk River in 1990 and 1991 indicated that there were 17+9 g dry mass per meter squared in the control zone and 322+96 g in the enriched zone (+/-SE, N = 5). We utilized point transects in 1992 and 1993 to estimate bryophyte coverage in the enriched and control zones (see 92BOMOPT AND 93BOMOPT .DOC AND .DAT). These data suggested that the increase in bryophyte biomass was confined to fertilized riffles of the river. To substantiate these data, we examined bryophyte growth in the river using clumps and stem tips of Hygrohypnum spp. and F. neomexicana transplanted from fertilized riffles to control and fertilized, pools and riffles. We affixed bryophyte clumps (0.5 to 1.5 g initial weight, towel- dried) and tips (3 to 7 cm long) to wooden boards with Velcro strips and staked them to the stream bottom so the bryophytes were exposed to a natural flow regime. Clumps were not placed in pools in 1992. All bryophytes were initially free of visible detritus and periphyton. Bryophytes were placed in the stream 7 July, and were collected and re-weighed and re-measured on 8 August (after 32 days). Clump weights were initially unequal so changes in weight were expressed as percent change from initial values. Tip elongation was expressed as an absolute change from the initial tip length. Calculations: Variable Formula 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 dripper       0.05 km             n
DATE          date                          ddmmyy              n
LOCATION      location (CONTROL, +P)                            n
SUBSITE       typically POOL, RUN, or RIFFLE                    n
HCINITIAL     initial Hygrohypnum weight    0.01 g              n
HCFINAL       final Hygrohypnum weight      0.01 g              n
HC%CH         % change in Hygrohypnum weight                    n
FCINITIAL     initial Fontinalis weight     0.01 g              n
FCFINAL       final Fontinalis weight       0.01 g              n
FC%CH         % change in Fontinalis weight                     n
HTINITIAL     initial Hygrohypnum length    0.1 cm              n
HTFINAL       final Hygrohypnum length      0.1 cm              n
HT%CH         % change in Hygrohypnum length                    n
FTINITIAL     initial Fontinalis length     0.1 cm              n
FTFINAL       final Fontinalis length       0.1 cm              n
FT%CH         % change in Fontinalis length                     n
COMMENTS      data specific comments                            n