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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:	93bomogr
Dataset Title:	Bryophyte growth data from the Kuparuk River, Arctic LTER 1993.
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, control, fertilized, phosphorus, riffle, pool
Abstract:	Bryophyte growth data from the Kuparuk River. We measured growth of Hygrohypnum spp. clumps 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	93bomogr
Beginning Date	5/1/1993
End Date	9/1/1993
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 97 DATA FILE ENTERED BY: Karie Slavik DATA FILE VALIDATION: NAME: DATE



RESEARCH LOCATION:
Geographic Description	Kuparuk River: Control: riffles and pools, 0.45 to -1.0 km Fertilized: riffles and pools, from 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. Bryophyte biomass collections from random quadrats 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 of Hygrohypnum spp. transplanted from fertilized riffles to control and fertilized, pools and riffles. We affixed clumps of Hygrohypnum (0.5 to 1.5 g initial weight, towel-dried) to wooden boards with Velcro strips and staked them to the stream bottom so the bryophytes were exposed to a natural flow regime. All bryophytes were initially free of visible detritus and periphyton. Bryophytes were placed in the stream in late June, and were collected and re-weighed on 8 August after 44 days of manipulation. Notes: Clump weights were initially unequal so changes in weight were expressed as percent change from initial values. 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
REP           replicate number on individual board              n
INITIAL       initial Hygrohypnum weight    0.01 g              n
FINAL         final Hygrohypnum weight      0.01 g              n
%CHANGE       percent change in weight                          n
COMMENTS      data specific comments                            n