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on land ,— aquatic plants supporting herbivorous forms, which in turn 

 provide food for the carnivores. These .again, supply an important 

 element in the diet of some of the hirds and nammals which frequent 

 the hahitat provided by streams. 



We have seen that in the nonnal nrder of existence there are 

 close interrelationships in function and in habit between all forms 

 of life, and that all are beneficial, since each is dependent on, 

 or controlled by, some other. Let us turn now from the primeval 

 forest to a consideration of conditions which have i&risen since the 

 advent of the white man and civilization to this country, but a 

 comparatively short time a9:o . 



I'he attractiveness of this country to settlers was due to the 

 richness of its natural resources , and its rapid development was 

 made possible by the destruction and use of the forests and wild 

 life. The forests were cleared to make room for settlements, and 

 later lumbering of certain of the more valuable species became a 

 most important industry. With the forest area reduced, competition 

 for space and food became more keen among the wild life, xhe destruc- 

 tion by the settlers of certain forms for food, fur, or as a pro- 

 tective measure, further upset the finely adjusted balance of nature. 

 Artificial conditions were imposed on all sides by the advance of 

 civilization, and those species which were unable to adjust them- 

 selves to the new conditions were destroyed; others, findhg the sit- 

 uation improved, and their enemies reduced in numbers, multiplied 

 rapidly and became obnoxious pests. 



jBian himself has had to make adjustments to the ever changing 



