Brook Life 79 



Study 14 

 THE LIFE OF A SPRING BROOK 



Work Program: 



1. A field trip for the purpose of: 



A. Individual collecting by hand picking from sticks and stones lifted from the 



water, and from roots and stems trailing in the edges and from watercresses, 

 and by means of dip nets from the pools. 



B. Hand screen collecting from the riffles and sieve net collecting from the sand 



bars and mud of the basins. 



2. A laboratory examination of the materials collected. 



3. Reading in text, Life of Inland Waters, pp. 57, 58; 77-88 and 363-376. 



For Record include: 



1. A sketch map showing collecting places. 



2. A tabular statement naming a few of the forms most characteristic of the following 



situations: 



(a) On exposed surfaces of stones. 



(b) In sheltering crevices beneath stones and gravel. 



(c) In sand and gravel bars. 



(d) In mud beds of settling basins. 



(e) On roots and trailing in the edges of the current. 



3. An annotated list of the organisms studied arranged as follows: 



I. Plants — with notes on size, relative abundance, habitat, growth habits, etc. 



A. Seed plants — in current and in edges. 



B. Algse — microscopic ones only when these appear in masses or color the 



bottom. 



Fringing (sessile) algae. Slime-coat algae. Encrusting algae. 



II. Animals — with notes on size, color, relative abundance, feeding habits stages 



or ages found, habitat and special adaptations or activities. 



A. \'ertebrates — fishes and others. 



B. Invertebrates: 



Free ranging. 



Sessile, on the stones or on bottom. 



Burrowers that dig. 



Burrowers that squeeze through. 



Tube dwellers. 



