68 Proceedings of the Ohio State Academy of Science. 



Cyanophyceae are present. Frequently fungal threads lie on the 

 leaf and seem to be in the cells. In later stages the branches 

 and finally the entire top of the frond becomes black. They are 

 covered with small masses of Algae surrounc^ed by fungal 

 threads resembling the soredia of Lichens. The apothecia of two 

 Discomycetes were found on the fronds. These have been identi- 

 fied by Professor Bruce Fink as the apothecia of the Lichens, 

 Gyalecta lutea and Lecidia uliginosa. Examination of living 

 fronds discovered fungal threads in the hyaline cells of the Sphag- 

 num scales. Finally the Sphagnum dies and dries completely. 

 The result of this dying of the Sphagnum is of ecological interest. 

 Even before death occurs, Pallavicinia lyellii comes in frequently 

 in the wetter areas. Aulocomnium palustre and Polytrichium 

 commune or ohioense invade the drier areas of dead Sphagnum. 



Study of a belt transect. 



In order to present in detail the sequence of the associations 

 of the island, the components of each and also the succession of 

 one by another, a belt transect, lo feet wide from a-a' and b-b' 

 on the map, was studied and platted, (Fig. 13). 



Beginning with the little cove at the shore the belt transect 

 surveyed passes thru, I, a very narrow zone of aquatic plants ; 11, 

 a mixed zone of marsh plants and bog shrubs; III, the high 

 shrub; IV. the heath and V includes fifteen feet of the bog 

 meadow. The transect was platted in a part of the island 

 which would include the heath zone, for here the normal 

 high lattitude bog succession is developing except that the 

 order of zones III, IV and V are reversed with reference 

 to zone I, with a clearly outlined marsh wanting. Normally, 

 the meadow when present, immediately follows the marsh, 

 then the heath and the last in order is the high shrub and 

 forest. The transect also revealed the rapid development of the 

 heath zone. Fig. 26 is a diagram of this transect showing the 

 relative breadth of zone and the position of the principal species. 



The cove, thru the center of which the transect was taken, 

 is almost closed, affording only a narrow passage from the 



