Virginia Institute of Marine Science
The following relationship was investigated for a total of 44 stations, using sequential (linear) multiregression analysis:
A = f (D, S a , S., C, M , S , W)
where A = the frequency of an infauna! invertebrate species, D : water depth at the station, Sa = per cent sand, Si =percent silt, C = per cent clay, Mz = mean grain size, S o = sediment Sorting Coefficient, and W = water content. Three animals were chosen for the dependent variable: Ensis directus, Nephtys incisa, and Retusa canaliculata.
Results of the least-squares search procedure indicate that if the water content is carefully determined this variable always appears as one of the most important, when the independent variables are considered in combinations of two or three at a time. The implication is that water content, a mass property of the sediment that reflects the interrelationships of mean grain size, sorting, grain packing, and mineralogy, is a highly useful environmental variable that should be measured in studies that attempt to establish animal-sediment relationships.
Harrison, W. and Wass, Marvin L., Frequencies of infaunal invertebrates related to water content of Chesapeake Bay sediments (1965). Southeastern Geology, 6(4), 177-187.