AQUATIC LIFE 1 29 



Station I is located in the extreme north-west corner of the 

 Cove and marked by a long pole driven solidly into the bottom 

 at this place. The water is very shallow, i^ feet deep. The 

 bottom is covered with decomposed plant life, consisting chiefly 

 of water lily pads and bulrushes. Owing to the shallowness the 

 temperature of the water varies directly with atmospheric changes. 

 As in all shallow water, the temperature remains constant or 

 usually tends to constancy throughout the slight depth according 

 to the changes of air temperature. The shore at this point is 

 covered with ferns and short grasses forming a swampy under- 

 growth. Owing to this form of vegetation there is little protection 

 from the sun. 



Station II is similarly situated near the shore which is swampy 

 and sparsely protected by shade. The water is slightly deeper 

 than at Station I, being 2^ feet deep. Other characteristics are 

 similar to Station I. A large water-soaked log extending from 

 the swamp makes a very stable land mark for this station. 



Station III is one of the most interesting points studied, being 

 located in the mouth of a sewer channel which carries all the 

 sewage from Cedar Point and empties part of it into the Cove. 

 The remainder is carried, by a deepening of the channel to 4 feet, 

 into Sandusky Bay. Station III is located in the extreme south- 

 west corner of the Cove at the entrance of the sewer channel into 

 the Cove. At this point the water is 3 1-6 feet deep and is extremely 

 turbid, caused by sewage. There is a decide.d current produced 

 here and continues to the Bay owing to the fact that the channel is 

 several feet deeper than the surrounding water of the Cove. Due 

 to this and to the great force that propels the sewage into the 

 channel, the current is very strong and vegetation is not given a 

 chance to grow as it does in the quiet water of the rest of the Cove. 

 This current produces a fluctuation of forms and numbers at this 

 station. The bottom is covered with a deep black slime. The 

 water is protected from the sun by shrubs and small trees extending 

 from the bank of the peninsula on the south. 



Station IV is midway between Station III and the end of the 

 Cove on the south side, being too far from the sewer channel to be 

 noticeably affected by it. The bank slopes gentl}^ to a height of 

 about 5 feet on the top of which there is a slight second-growth of 

 trees which furnish considerable shade for this station. The bottom 

 is rather sandy and free from abundant vegetation and is gradually 



