MaineDEP - Eelgrass 2018 (Casco Bay Only)

Identification Information:
Citation Information:
Publication Date: 20190208
Title: MaineDEP - Eelgrass 2018 (Casco Bay Only)
Online Linkage:
Abstract: 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.
Purpose: Eelgrass Beds 2018 (Casco Bay Only)
Time Period of Content:
Time Period Information:
Range of Dates/Times:
Beginning Date: 20180101
Ending Date: 20181231
Currentness Reference: Casco Bay, Maine
Progress: Complete
Maintenance and Update Frequency: None planned
Spatial Domain:
Bounding Coordinates:
West Bounding Coordinate: -70.3402
East Bounding Coordinate: -69.7387
North Bounding Coordinate: 43.8731
South Bounding Coordinate: 43.6271
Theme Keyword Thesaurus: ISO 19115 Topic Categories
Theme Keyword: biota
Theme Keyword: environment
Theme Keyword Thesaurus: None
Theme Keyword: MaineDEP
Theme Keyword: biota
Theme Keyword: dep
Theme Keyword: environment
Theme Keyword: eelgrass
Theme Keyword: Maine DEP
Theme Keyword: Maine Department of Environmental Protection
Theme Keyword: state of maine
Theme Keyword: BIOLOGY
Theme Keyword: coastal
Theme Keyword: submerged aquatic vegetation
Theme Keyword: Zostera marina
Theme Keyword: oceans
Theme Keyword: habitat
Theme Keyword: MaineGeoLibrary
Access Constraints: None
Use Constraints: None
Data Set Credit: 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.
Entity and Attribute Information:
Overview Description:
Entity and Attribute Overview:
Eelgrass percent cover based on crown cover categories as adapted by Orth et al and described in Orth, R.J., J.F. Nowak, D.J. Wilcox, J.R. Whiting, and L.S. Nagey. 1998. Distribution of Submerged Aquatic Vegetation in the Chesapeake Bay and Tributaries and the Coastal Bays –1997. VIMS Special Scientific Report Number 138. 351 pp.
Metadata Reference Information:
Metadata Date: 20190208
Metadata Contact:
Contact Information:
Contact Organization Primary:
Contact Organization: Maine Department of Environmental Protection
Contact Address:
Address Type: physical
Address: 28 Tyson Dr
City: Augusta
State or Province: ME
Postal Code: 04333
Country: US
Contact Voice Telephone: 207-287-7688
Metadata Standard Name: FGDC Content Standard for Digital Geospatial Metadata
Metadata Standard Version: FGDC-STD-001-1998
Metadata Time Convention: local time