Main Title |
Eelgrass Distribution in the Great Bay Estuary 1981. Final Report. |
Author |
F. Short
|
CORP Author |
New Hampshire Univ., Durham. Jackson Estuarine Lab. |
Year Published |
2009 |
Stock Number |
PB2011-107452 |
Additional Subjects |
Eelgrass distribution ;
Great Bay Estuary ;
Habitat ;
Waterfowl ;
Junvenile fish ;
Estuarine food ;
Eelgrass(Zostera marina) ;
Great Bay Estuary(GBE)
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
NTIS |
PB2011-107452 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
3p |
Abstract |
The methods for this project followed the procedures specified in the approved QA Project Plan (Short and Trowbridge, 2003). Eelgrass meadow polygons for 1981 were mapped from USDA black-and-white aerial photographs, on file at the Strafford County and Rockingham County (NH) offices. The photographs were scanned and analyzed digitally after rubber sheeting the images to fit the Great Bay Estuary base map. The 1981 photographs were not ortho-photographs and some distortion across each photograph was evident. To minimize this effect, multiple photographs for each area were used to geo-reference actual locations on the eelgrass distribution map. Some areas of the estuary did not have adequate 1981 images to allow mapping; these areas are marked in red on the map (Figure 1). Ground truth verification of distribution was done by comparison to eelgrass mapping done by NH Fish and Game (Nelson, 1981). Eelgrass cover classes were determined using the standard protocol (Short and Trowbridge, 2003) with the added limitations of black-and-white photograph. |
Availability Notes |
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PUB Date Free Form |
22 Jan 2009 |
Category Codes |
98F |
NTIS Prices |
PC A01 |
Document Type |
NT |
Cataloging Source |
NTIS/MT |
Control Number |
119201410 |
Origin |
NTIS |
Type |
CAT |