Chart Quadrat 



A chart or map of a sample area showing the location 



and area of each plant. 



Chasmophyte 



A plant growing in the crevice of rocks, e.g., saxifrages, 

 cf. Chomophyte. 



Check Dam 



A small low dam constructed in a watercourse to decrease 

 the velocity of stream flow and to promote the deposition of 

 eroded material. 



Chemical Stratification 



A condition found in temperate lakes of the second order 

 during the summer and winter stagnation periods in which 

 certain horizontal strata become different chemically from 

 adjacent ones, often with abrupt transitions. 



Chemosynthesis 



The kind of nutrition found in various bacteria in which 

 energy is secured from the oxidation of inorganic materials. 



Chemotaxis 



Movement of an organism induced by a chemical 

 stimulus. 



Chemotrophic 



Refers to an organism that obtains energy from a chemi- 

 cal reaction, excluding light, e.g., sulfur bacteria, cf. Hetero- 

 trophic, Autotrophic, Phototrophic. 



Chemotropism 



Growth of an organism in response to a chemical 

 stimulus. 



Chernozem 



A zonal group of soils with deep, dark brown to black, 

 fertile surface soil, rich in organic matter, grading into lighter 



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