Extreme range of environmental conditions limits the variety of 

 marsh foraminifera. Knowledge of the environment is inadequate to 

 explain distributions within the marsh. (A. A.) 



Keywords: salt marshes, foraminifera, Galveston Bay 



V-E-10 



Nagle, J.S. 1968. Distribution of the epibiota of macroepibenthic 



plants. University of Texas Contributions in Marine Science 13:105-144. 



The macrofauna, meiofauna, and epi flora of the southwest Cape Cod 

 eelgrass and algal communities have been quantitatively studied in 

 terms of vertical and peripheral distribution on individual plants, 

 differences in areal distribution in one season, and seasonal changes 

 in distribution patterns. 



It was found that faunal abundance on individual plants varies 

 with distance from the bottom and abundance of epiphytes. Some animals 

 vary in peripheral as well as vertical abundance. In a locally varied 

 habitat, amphipod populations show both dispersion and concentration. 

 Areal distribution of the macrofauna varies with kinetic energy and 

 sal inity. 



Seasonally, populations of mollusks epifaunal on eelgrass show a 

 summer maximum coincident with breeding periods but also have high 

 fall and winter maxima unrelated to breeding. Populations of eelgrass- 

 dwelling amphipods not only exhibit the concentrated winter maxima 

 of mollusks but also have several submaxima throughout the year. 

 The amphipods breed throughout the year; the submaxima are related 

 to the staggered breeding cycles of potentially competing species. 



Summer populations tend to be stable and follow Cause's principle 

 of competitive exclusion. Winter populations tend to be unstable, 

 and competing species follow Cause's principle less closely. To 

 persist, an epizoal species must be adapted to this physically 

 unstable situation; it must be adapted to both its dispersed summer 

 habitat and to the one winter habitat occupied by all epizoa. (A. A.) 



Keywords: epibiota, macroepibenthic plants, macrofauna, mollusks, 

 eelgrass. Cape Cod 



V-E-n 



Fox, R.S., and K.H. Bynum. 1975. The amphipod crustaceans of 



North Carolina estuarine waters. Chesapeake Science 16:223-237. 



Seventy-four species of gaimaridean (nine undescribed) and four 

 species of caprellidean amphipods are reported from estuarine waters 



270 



