Name: 1981

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Description: The mapping shows extensive eelgrass distribution throughout the Great Bay Estuary, except in areas where the photography was not adequate to interpret the images (primarily Portsmouth Harbor, the Oyster River and the upper Bellamy River). As the maps shows, and as verified by the NH Fish and Game maps of the same time frame (Nelson, 1981), there was much more eelgrass in Little Bay and the Piscataqua River in 1981 than 2007. (NH Fish and Game maps were created from boat surveys of eelgrass.) In Little Bay, eelgrass was found on many of the shallow flats as well as deeper areas. In the Piscataqua River, there were eelgrass beds and patches along both the Maine and New Hampshire sides of the river, although the NH Fish and Game mapping only covered the New Hampshire side. In Great Bay, extensive and sometimes dense eelgrass was found, roughly comparable to the 1996 findings, which showed the greatest eelgrass distribution mapped to date. The 1981 eelgrass distribution and cover map for the Great Bay Estuary represents an “earliest available” comprehensive map of the resource, as no earlier photography has been found with adequate tidal conditions to allow eelgrass mapping.

Service Item Id: 911c7c401d854692844a3e4031cf1b21

Copyright Text: Dr. Frederick Short, University of New Hampshire, Durham, NH

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