benthic fauna in the Chester River. It is interesting that dis¬ 
solved oxygen values for Baltimore Harbor are lower than for the 
site at Tilghman Island and only slightly higher than the values 
at Spaniard Bar. 
Data for Microbial Populations 
Data for enumeration of bacteria are shown in Tables 22 and 
23. Counts in sediment are higher than counts in water, as ex¬ 
pected. In general, estuarine sites showed higher bacterial 
counts in summer than in spring; this is expected as a function 
of temperature and of increased production of organic materials 
in the estuary in the summer. 
TABLE 22. VIABLE COUNTS OF BACTERIA FROM APRIL 1978 CRUISE 
Station/Site 
Type of 
Sample 
Total 
Viable 
Sample 
Resistant to 
Inorganic-Sn 
% 
Resistant 
Buoy Rock 
Water 
1 .2xl0 2 
1 .6xl0 2 
133 
Sediment 
2.OxlO 5 
1.3xl0 4 
6 
Spaniard Bar 
Water 
<1.2xl0 2 
<1.2xl0 2 
_* 
Sediment 
2 .4xl0 5 
1 .2xl0 5 
50 
Tenneco - 
effluent 
Water 
2 .8xl0 4 
2.OxlO 4 
10 
Tenneco - 
Water 
l.lxlO 4 
2 .2xl0 3 
20 
pond 
Sediment 
2.4xl0 6 
3.7xl0 5 
16 
Campbell 
Water 
6 .4xl0 3 
3.2xl0 3 
50 
plant 
Sediment 
4.lxlO 7 
2.lxlO 7 
51 
Chestertown 
Water 
1 .4xl0 2 
<1.2xl0 2 
_ * 
sewage 
treatment 
plant 
Sediment 
5.8xl0 5 
3.2xl0 5 
55 
* 
Data not accurate enough to yield a useful percentage. 
93 
