Name: Eelgrass2018

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Description: Maine's eelgrass meadows form an important marine and estuarine coastal aquatic habitat for the state. Along with other plants, eelgrass forms the base of food production in the sea. Eelgrass provides shelter for juvenile fish, and invertebrates, is a site for primary settlement of the larvae of some bivalve mollusks, and in certain locations helps to stabilize unconsolidated sediments and shorelines. In June 2018, Casco Bay was flown and photographed. Photography was timed near low tides with low wind velocity, good water clarity, and maximum biomass of eelgrass. These factors aid in the detection of the subtidal portion of a bed. Polygons delineating stands of eelgrass were screen digitized and coded using a four category scale of percent cover. Cover Class values: 1 = 0% to 10% cover, 2 = 10% to 40% cover, 3 = 40% to 70% cover, 4 = 70% to 100% cover. Verification was carried out by boat, on foot, and by plane. Though dense patches of eelgrass approximately 6 meters in diameter and less can be identified under good conditions and in some cases were mapped, a conservative estimate of the minimum mapping unit is 150 square meters. This represents a stand of approximately 14 meters in diameter.

Service Item Id: 384a01f3f29b4508a1293ff119b0d183

Copyright Text: These data were produced for the Maine Department of Environmental Protection, with funding assistance provided by the Casco Bay Estuary Partnership, Maine Department of Agriculture, Conservation and Forestry's Submerged Lands Program, The Nature Conservancy, and the Maine Department of Inland Fisheries and Wildlife's State Wildlife Grant. Credit should always be given to the data source and/or originator when the data are transferred or printed.

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