Griffen, B.D., T.H. DeWitt, and C. Langdon. 2004. Particle removal rates by the mud shrimp 
Upogebia pugettensis, its burrow, and a commensal clam: effects on estuarine phytoplankton 
abundance. Marine Ecology> Progress Series 269:223-236. 
Griffin, K. 1997. Eelgrass ecology and commercial oyster cultivation in Tillamook Bay, Oregon. A 
literature review and synthesis. Tillamook Bay National Estuary Project, Garibaldi, OR. 
Elansen, J., A.U. Pedersen, J. Bemtsen , I.S. Ronbog, L.S. Hansen, and B.A. Lomstein. 2000. 
Photosynthesis, respiration and nitrogen uptake by different compartments of a Zostera marina 
community. Aquatic Botany 66:281-295. 
Harding, L.W., Jr. and E.S. Perry. 1997. Long-term increase of phytoplankton biomass in Chesapeake 
Bay, 1950-1994. Marine Ecology Progress Series 157:39-52. 
Hauxwell, J., J. Cebrian, C. Furlong, and I. Valiela. 2001. Macroalgal canopies contribute to eelgrass 
(Zostera marina) decline in temperate estuarine ecosystems. Ecology 82:1007-1022. 
Hauxwell, J., J. Cebrian, and I. Valiela. 2003. Eelgrass Zostera marina loss in temperate estuaries: 
relationship to land-derived nitrogen loads and effect of light limitation imposed by algae. 
Marine Ecology Progress Series 247:59-73. 
Heidelbaugh, S.E, and W.G. Nelson. 1996. An evaluation of core and quadrat methods for assessing 
spatial and temporal changes in seagrass cover. Aquatic Botany 53:227-233. 
Hellblom, F. and M. Bjork. 1999. Photosynthetic responses in Zostera marina to decreasing salinity, 
inorganic carbon content and osmolality. Aquatic Botany 65:97-104. 
Helsel, D.R., D.K. Mueller, and J.R. Slack. 2006. Computer program for the Kendall family of trend 
tests. U.S. Geological Survey Scientific Investigations Report 2005-5275, 4 p. 
Hickey, B.M. and N. Banas. 2003. Oceanography of the U.S. Pacific Northwest coastal ocean and 
estuaries with application to coastal ecology. Estuaries 26:1010-1031. 
Hobbie, E.A., S.A. Macko, and M. Williams. 2000. Correlations between foliar 5 15 N and nitrogen 
concentrations may indicate plant-mycorrhizal interactions. Oecologia, 122, 273-283. 
Hofman, P.A.G. and S.A. de Jong. 1993. Sediment community production and respiration 
measurements: The use of microelectrodes and bell jars. In P.F. Kemp, B.F. Sherr, E.B. Sherr 
and J.J. Cole (eds.), Handbook of Methods in Aquatic Microbial Ecology. Lewis Publishers. 
Holst, L., R. Rozsa, L. Benoit, S. Jacobson, C. Rilling. 2003. Long Island Sound Habitat Restoration 
Initiative. Technical Support for Coastal Habitat Restoration. Section 3: Submerged Aquatic 
Vegetation. Long Island Sound Study, U.S. EPA Long Island Sound Office, Stamford, CT. 
n 
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