1 U.S. Geological Survey
2 U.S. Environmental Protection Agency
Characterization of Nutrients and Chlorophyll
Figure 1. Map showing sampling sites, site-identification numbers, and site types in the New England Coastal Basins study area in Massachusetts and New Hampshire
Figure 2. Graph showing total nitrogen concentrations among site types in the New England Coastal Basins study area
Figure 3. Graph showing total phosphorus concentrations among site types in the New England Coastal Basins study area
Figure 4. Graph showing chlorophyll a from periphyton samples among site types at the open-canopy locations in the New England Coastal Basins study area
Figure 5. Graph showing chlorophyll a from periphyton samples among site types at the closed-canopy locations in the New England Coastal Basins study area
Figure 6. Graph showing chlorophyll a from periphyton samples among site types at the six sites with open- and closed-canopy sampling locations in the New England Coastal Basins study area
Figure 7. Graph showing relation between total nitrogen and periphyton chlorophyll a concentrations for the six open-canopy sites sampled five times from June through September 2001 in the New England Coastal Basins study area in Massachusetts and New Hampshire
Figure 8. Graph showing relation between total phosphorus and periphyton chlorophyll a concentrations for the six open-canopy sites sampled five times from June through September 2001 in the New England Coastal Basins study area in Massachusetts and New Hampshire
Table 1. Selected characteristics for the study sites in the New England Coastal Basins study area in Massachusetts and New Hampshire
Table 2. Summary of selected nutrient and chlorophyll a concentrations (open- and closed-canopy sites) for the study site types in the New England Coastal Basins study area in Massachusetts and New Hampshire
Table 3. Percentile statistics of total nitrogen, total phosphorus, and periphyton chlorophyll a concentrations for the study sites in the New England Coastal Basins study area in Massachusetts and New Hampshire
Table 4. Summary of total nitrogen and total phosphorus concentrations for potential methods of nutrient criteria development in the Northeastern Coastal Zone in Massachusetts and New Hampshire
Complete text of report (784 KB PDF)
To view PDF documents, you must have the Adobe Acrobat Reader (free
from Adobe Systems) installed on your computer.
(download free
copy of Acrobat Reader).
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.
For additional information, write to:
District Chief
U.S. Geological Survey
New Hampshire/Vermont District
361 Commerce Way
Pembroke, NH 03275-3718
or visit our Web site at http://nh.water.usgs.gov
Copies of this report can be purchased from:
U.S. Geological Survey
Branch of Information Services
Box 25286, Federal Center
Denver, CO 80225-0286
| AccessibilityFOIAPrivacyPolicies and Notices | |
  |
|