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A key factor that needs to be considered as part of any beach nourishment project is the potential for smothering or temporary loss of marine life or habitats when placing the sand.Eelgrass (Zostera marina) is considered important submerged aquatic vegetation of special interest in California, special aquatic sites (vegetated shallows) under the federal Clean Water Act (SAIC, 2008), and Essential Fish Habitat (NOAA Fisheries and federal and state agency designation). Cutting and disturbing eelgrass is prohibited by California fishing regulations. Eelgrass provides habitat for a variety of invertebrates and fish, including nursery habitat. The primary factors controlling eelgrass growth are light availability, substrate composition, temperature, salinity, nutrient availability, and wave/current energy. Light affects the depth distribution of eelgrass through its role in photosynthesis. The degree to which light is attenuated with depth in the water column is a strong determinant of the lower limit to which eelgrass can grow. Eelgrass can grow in a wide variety of substrates, but generally they flourish in medium to fine sands that contain relatively high levels of organic matter and nutrients. Prior to 1993, the Del Monte eelgrass meadow covered a continuous 0.1 square miles of the seabed in water depths of 20-30 feet inshore and west of the rocky reef and kelp forest. Zimmerman et al. (2001) indicated that the meadow was fragmented and reduced to less than 50% of its total size following heavy grazing by a southern species of limpet that began in 1993. The prospects for recovery of the meadow to its former size were not considered favorable due to the limpet grazing. However, data after 2001 are limited and the status of this eelgrass meadow was not known as of 2005 (CDFG, 2005).", "geometryType": "esriGeometryPolygon", "sourceSpatialReference": { "wkid": 102100, "latestWkid": 3857, "xyTolerance": 0.001, "zTolerance": 0.001, "mTolerance": 0.001, "falseX": -20037700, "falseY": -30241100, "xyUnits": 10000, "falseZ": -100000, "zUnits": 10000, "falseM": -100000, "mUnits": 10000 }, "copyrightText": "Zimmerman, R.C., Steller, D.L., Kohrs, D.G. and Alberte, R.S. (2001), The Association of Monterey Bay Area Governments (AMBAG), California Coastal Sediment Management Workgroup", "parentLayer": null, "subLayers": [], "minScale": 3000000, "maxScale": 0, "referenceScale": 0.0, "drawingInfo": { "renderer": { "type": "uniqueValue", "field1": "COMNAME", "uniqueValueInfos": [ { "symbol": { "type": "esriSFS", "style": "esriSFSSolid", "color": [ 0, 0, 0, 0 ], "outline": { "type": "esriSLS", "style": "esriSLSDashDot", "color": [ 112, 168, 0, 255 ], "width": 2 } }, "value": "Eelgrass", "label": "Eelgrass" } ], "fieldDelimiter": ",", "authoringInfo": { "colorRamp": { "type": "multipart", "colorRamps": [ { "type": "algorithmic", "algorithm": "esriCIELabAlgorithm", "fromColor": [ 196, 178, 59, 255 ], "toColor": [ 196, 178, 59, 255 ] }, { "type": "algorithmic", "algorithm": "esriCIELabAlgorithm", "fromColor": [ 48, 81, 191, 255 ], "toColor": [ 48, 81, 191, 255 ] }, { "type": "algorithmic", "algorithm": "esriCIELabAlgorithm", "fromColor": [ 171, 38, 80, 255 ], 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