5-3 Composition, Formation, and Primary Abiotic Forces 

 Affecting the Substrata of the Estuarine 

 System and Subsystems 5-15 



5-4 Estimate of Net Annual Primary Production (kgC/y XI 0°) 



by Region and Percentage Contribution to the Total 

 Productivity of Producers Found in the Estuarine System . . 5-74 



5-5 Relative Abundance of Major Zooplankton Species 

 in the Sheepscot Estuary (Montsweag Bay) 

 from January, 1975, to December, 1976 5-83 



5-6 Average Density of Estuarine Invertebrates in 

 Unconsolidated Sediments of Temperate and 

 Boreal Estuaries and Bays 5-87 



5-7 The Most Common Invertebrates Collected from, or 

 Recorded on, Subtidal and Rock Bottoms in 

 the Sheepscot Estuary 5-89 



5-8 Invertebrate Species Common to All Estuarine 



Intertidal Areas of Coastal Maine 5-93 



5-9 Invertebrates Common to Gravel and Cobble Beaches in 



Maine Estuaries and Relative Scores of Abundance 5-97 



5-10 Numbers of Individuals/m^ Collected on Intertidal 



Flats in Upper Penobscot Bay (Region 4) 5-100 



5-11 The Relative Abundance of Invertebrate Species Commonly 

 Taken in Samples of Maine's Sand Flats, as Determined 

 by Rank Score Analysis 5-103 



5-12 The Relative Abundance of the Invertebrate Species 

 Commonly Taken in Samples of Maine's Mudflats as 

 Determined by Rank Score Analysis 5-106 



5-13 Inundation Patterns as a Function of Height Above Mean 



Low Water (MLW) in a New England Salt Marsh 5-112 



5-14 The Relationship of Vertical Range of the Three Principal 

 Salt Marsh Emergents in the Franklin and Salisbury 

 Cove Salt Marsh Near Ellsworth, ME 5-113 



5-15 Emergent Vegetation Associaced with Salt 



Marshes in Maine 5-116 



5-16 Net Aerial Primary Productivity (NAPP) g/m /yr of 



Species in Salt Marshes at Different Locations 5-125 



XVlll 



