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TV036
Streamside mosses at the Andrews Experimental Forest, 1994

CREATOR(S): Bengt Gunnar Jonsson
PRINCIPAL INVESTIGATOR(S): Bengt Gunnar Jonsson
ORIGINATOR(S): Bengt Gunnar Jonsson
OTHER RESEARCHER(S): Thomas A. Spies, W. Arthur McKee
DATA SET CONTACT PERSON: Charles B. Halpern
ABSTRACTOR: Bengt Gunnar Jonsson
METADATA CREATION DATE:
13 Apr 1995
MOST RECENT METADATA REVIEW DATE:
10 Jan 2014
KEYWORDS:
Populations, community patterns, populations, H. J. Andrews Experimental Forest (AND), community dynamics, trophic structure, environmental gradients, riparian ecosystems, streams, liverworts, mosses, bryophytes, vegetation
METHODS:
Experimental Design - TV036:
Description: Forty-two sites were sampled, covering the altitudinal and stream size range. Sampling stratified on stream order (1st to 5th) and elevation classes (less than 600 m, 600-800 m, 800-1000 m, greater than 1000 m asl), providing 14 possible combinations (larger streams absent at higher elevations). Three sites placed within each strata based on old-growth conditions and at least 50 m from nearest road or clear-cut.
Field Methods - TV036:
Description:

Site sampling consisted of a 50 m long transect beginning in the center of the stream channel. Five 2 x 4 m quadrats were located along the first 10 meters and 5 additional quadrats every 8th meter up to 50 meter, giving a total of 10 quadrats per transect. In 1st order streams only the first 5 quadrats were analyzed. A total of 360 quadrats were sampled.

In each quadrat percentage cover was measured for;

  • Canopy cover of conifers and deciduous trees
  • Ground cover of shrubs, herbs and bryophytes
  • Ground cover of exposed soil, sand, gravel (including pebbles and cobbles), boulders, debris (litter and woody debris less than 10 cm diameter), and coarse woody debris (greater than 10 cm diameter)
  • Cover of all occurring bryophyte species

In addition slope between each quadrat was measured by a 2-meter measuring stick.

SUPPLEMENTAL INFORMATION:

The study was performed by Dr. Bengt Gunnar Jonsson during a 9-month post-doc period between July 1994 and April 1995. Funding was provided by the Swedish - American Foundation and The Swedish Institute and logistic support provided by the National Science Foundation grants to Oregon State University (LTER-grant).

Values of 0.1% in the COVER field of entity 1 were originally recorded as 'trace' in the field.

TAXONOMIC SYSTEM:
None
GEOGRAPHIC EXTENT:
Andrews Experimental Forest
MEASUREMENT FREQUENCY:
once only
PROGRESS DESCRIPTION:
Complete
UPDATE FREQUENCY DESCRIPTION:
notPlanned
CURRENTNESS REFERENCE:
Ground condition