Open-File Report 2004-1401ONLINE ONLY
Data on the chemical composition of water and on amphibian populations were collected at least
annually from vernal pool and stream sites in Maryland, Washington, D.C., and Virginia, from 2001
through 2004. The data were collected as part of long-term monitoring projects of the Northeast
Region of the Amphibian Research and Monitoring Initiative (ARMI) of the U.S. Geological Survey.
Water samples were analyzed for temperature, specific conductance, pH, dissolved-oxygen
concentration, acid-neutralizing capacity, and concentrations of total Kjeldahl nitrogen and total
phosphorus; in 2004, samples also were analyzed for nitrite plus nitrate concentrations and total
nitrogen concentrations. Field and laboratory analytical results of water samples and quality-assurance
information are presented. Amphibian population data include the presence of amphibian species and
the maximum number of egg masses of wood frogs and spotted salamanders at vernal pools, and
counts of amphibians made during stream transect and stream quadrat surveys.
Purpose and Scope
Description of Study Areas
Collection and Analysis of Samples
Field Data-Collection Methods
Laboratory Analysis Methods
Quality Assurance and Quality Control
Water-Quality and Amphibian Population Data
This report is available online in Portable Document Format (PDF). If you do not have the Adobe Acrobat PDF Reader, it is available for free download from Adobe Systems Incorporated.
Download the report (PDF, 2.3 MB)
Document Accessibility: Adobe Systems Incorporated has information about PDFs and the visually impaired. This information provides tools to help make PDF files accessible. These tools convert Adobe PDF documents into HTML or ASCII text, which then can be read by a number of common screen-reading programs that synthesize text as audible speech. In addition, an accessible version of Acrobat Reader 5.0 for Windows (English only), which contains support for screen readers, is available. These tools and the accessible reader may be obtained free from Adobe at Adobe Access.
Send questions or comments about this report to the Virginia District Office (804) 261-2600.
For more information about USGS activities in Virginia, visit the USGS Virginia District home page.
|AccessibilityFOIAPrivacyPolicies and Notices|
|U.S. Department of the Interior, U.S. Geological Survey
Page Contact Information: Contact USGS
Last modified: Saturday, January 12 2013, 11:40:05 PM