TV070
Primary succession on Mount St. Helens: long-term permanent plots

CREATOR(S): Roger del Moral

PRINCIPAL INVESTIGATOR(S): Roger del Moral

ORIGINATOR(S): Roger del Moral

DATA SET CONTACT PERSON: Roger del Moral

METADATA CONTACT: Roger del Moral

DATA SET CREDIT:

This material is based upon work supported by the National Science Foundation under LTREB Grants No. 0089704, 9406957, 8906544 and earlier grants.

METADATA CREATION DATE:

5 Oct 2005

MOST RECENT METADATA REVIEW DATE:

19 Dec 2012

KEYWORDS:

Disturbance, permanent plots, succession, disturbance, volcanic, grasses, forbs, shrubs, conifers, mosses

PURPOSE:

This database was developed to document the recovery of vegetation under a variety of initial impact types. It is used to test hypotheses concerning recovery rates as a function of impact and isolation. A major goal is that other researchers will use the data for meta-analyses and to test particular hypotheses.

METHODS:

Experimental Design - TV070:

Description: Transects established at pre-determined locations.

Field Methods - TV070 :

Description: Circular permanent plots. Sub-samples: Six ¼-m2 quadrats located at 1 m intervals on each of 4 marked radii, always on left side of transect as one faces outward. Quadrats start at 1.6 m from center and are then located at 2.6 m, 3.6 m, etc. To determine the “A” transect, stand in plot center and face the direction of the transect. The A radius will be over your left shoulder. The “B” radius is the next one in a clockwise direction. Species not sampled, but within the plot are recorded and given an arbitrary score of 0.1%.

Statistical Methods - TV070 :

Description: Data are summarized using an ad hoc program using EXCEL (prepared by Lara Rozzell).

Permanent Plots - TV070:

Description: Plots are as described.

Processing Procedure - TV070:

Description: Data are entered into the program by species in each plot; a spreadsheet that mimics the field sheet is created. This is used to locate errors. The program produces the data for each plot summarized by species.

SUPPLEMENTAL INFORMATION:

See links provided.

TAXONOMIC SYSTEM:

ITIS, the Integrated Taxonomic Information System

GEOGRAPHIC EXTENT:

Butte Camp: Tephra and Lahars, Pine Creek Ridge Scours, Pumice Plain Blast and Pumice, Abraham Plain Blast, Lahar, Pumice, Studebaker Ridge Blast, Toutle Ridge Blast (to 1997).

ELEVATION_MINIMUM (meters):

1208

ELEVATION_MAXIMUM (meters):

1705

MEASUREMENT FREQUENCY:

Annual or in some cases biannual.

PROGRESS DESCRIPTION:

Complete

UPDATE FREQUENCY DESCRIPTION:

annually

CURRENTNESS REFERENCE:

Observed

RELATED MATERIAL:

A photographic collection from Mount St. Helens is available at: http://content.lib.washington.edu/mtsthelensweb/index.html maintained by the University of Washington Library system.

The research program is summarized at: http://faculty.washington.edu/moral/mount.html This site has links to recent research, papers and data summaries.

Data summaries are available at: http://faculty.washington.edu/moral/pdf/2005PermanentPlots.pdf This page provides overall summary of selected sites.

http://protist.biology.washington.edu/delmoral/ This site includes the latest update summaries for the permanent plots. For each plot, the values for richness, cover and diversity are presented for each year. The mean cover value for each species in each plot in each year is shown. Field notes remain archived by PI, Hitchcock Hall, University of Washington, Seattle.

Publications: The data from these plots have formed the basis of several papers. Citations are available at: http://faculty.washington.edu/moral/publications.html

Links are provided to .pdf files of the available papers.