incomplete oxidation of the organic debris, the bottom sediments 

 contain a rich assemblage of amino acids, sugars, and many other 

 organic compounds whose future study may provide much biochemical 

 interest. (J.B.) 



Keywords: freshwater ponds, biology, plankton, productivity. 

 Cape Cod 



I-D-9 



Barbour, M.G., R.B. Craig, F.R. Drysdale, and M.T. Ghiselin. 1973. Coastal 

 ecology: Bodega Head. University of California Press, Berkeley. 338 pp. 



Bodega Head is a small coastal peninsula about 65 miles north of 

 San Francisco. It consists of six major habitat units: grassland and 

 ocean-facing cliffs; rocky intertidal zone; beach and dunes; saltwater 

 marsh and mudflat; freshwater marsh and seasonally wet areas; and 

 areas transformed by human activities. The vegetation and wildlife of 

 each habitat are discussed in detail, as well as man's impact. 



The major plant species in the saltwater marsh and mudflat are salt- 

 grass ( Distichlis spicata ) , pickleweed ( Salicornia virqinica ), bulrush 

 ( Scirpus americanus ), arrow grass ( Triglochin maritima ), jaumea ( Jaumea 

 carnosa ), annual bulrush ( Scirpus koilolepis] ", bird's beak ( Cordylanthus 

 maritimus ) , and plantain ( Plantago lanceolata ) . The freshwater marsh is 

 dominated by sow thistle ( Sonchus asper ), velvet grass ( Holcus lanatus ), 

 rushes ( Juncus leseurii and Juncus bolanderi ), cinquefoil ( Potentilla 

 eqedei ) , willow herb ( Epilobium adenocaulon ) , clover ( Tri folium worskioldii ) , 

 hairy cat's ear ( Hypochoeris radicata ), curly dock ( Rumex crispus j, norse- 

 tail ( Equisetum arvense ) , bull thistle ( Cirsium vulgare ), fireweed 

 ( Erechtites prenanthoides ) , monkey flower ( MTrniTlus guttatus ), oenanthe 

 ( OenantheTarmentosa ) , and bur reed ( Sparganium eu.-ycarpum ) . The grasslands 

 are dominated bv sea pink ( Armeria maritima ), golden yarrow ( Eriophyllum 

 staechadi folium ) , poppy ( Eschscholzia californica), ryegrass ( Lolium 

 multiflorum ), lichens, lupine ( Lupinus arboreus ), sheep sorrel ( Rumex acetosella ] 

 and ripgut ( Bromus diandrus ). Productivity values are given for the 

 grassland, but not for the marshlands. 



The strand and dunes and, in particular, the mudflat community 

 and its suburbs are of interest as habitat. The former is in 

 centext of a low foredune, built up by constant deposits of sand 

 and the congealing power of plant roots, which separates the 

 strand from the central dunes of Bodega Head. Gradients in the 

 microenvironment are discussed in terms of soil texture and terrain, 

 temperature and wind, and salinity and wind. There is also a 

 discussion of zonation of organisms. 



Plant cover was measured along the entire dune transect. The importance 

 of each species to the community was estimated, and plant cover in 

 each area is summarized in tabular form, according to three segments: 



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