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Map Name: Eelgrass Beds
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Description: Maine's seagrass meadows, particularly eelgrass, 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. Aerial imagery was acquired during the peak aboveground biomass growing season, typically June to August. Photography was timed near low tides with low wind velocity, and good water clarity. These factors aid in the detection of the subtidal portion a bed. Polygons delineating stands of seagrass 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 seagrass 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 100-150 square meters depending on the year.
Service Item Id: 384a01f3f29b4508a1293ff119b0d183
Copyright Text: Maine DEP
Spatial Reference:
26919
(26919)
LatestVCSWkid(0)
Single Fused Map Cache: false
Initial Extent:
XMin: 342152.3873307435
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Spatial Reference: 26919
(26919)
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Full Extent:
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YMin: 4768765.4573661005
XMax: 538252.0722482929
YMax: 4930171.098297484
Spatial Reference: 26919
(26919)
LatestVCSWkid(0)
Units: esriMeters
Supported Image Format Types: PNG32,PNG24,PNG,JPG,DIB,TIFF,EMF,PS,PDF,GIF,SVG,SVGZ,BMP
Document Info:
Title: Maine Eelgrass and Seagrass
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Comments: Maine's seagrass meadows, particularly eelgrass, 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. Aerial imagery was acquired during the peak aboveground biomass growing season, typically June to August. Photography was timed near low tides with low wind velocity, and good water clarity. These factors aid in the detection of the subtidal portion a bed. Polygons delineating stands of seagrass 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 seagrass 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 100-150 square meters depending on the year.
Subject: Maine's seagrass meadows, particularly eelgrass, 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.
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Keywords: dep
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Supports Dynamic Layers: true
MaxRecordCount: 10000
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Supported Query Formats: JSON, geoJSON, PBF
Supports Query Data Elements: true
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Supports Datum Transformation: true
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