Pond Life 71 



For Record include: 



1. A sketch map of it, showing the location of the main features mentioned below. 



2. Sections of it showing (to a scale) height of vegetation and depth of bottom muck 



or marl, as well as depth of water. 



3. A description of it with notes arranged under the following headings: 



A. Name: kind of marsh (as marked by dominant vegetation), area, shape 



elevation; affluents, outlet, included islands and ponds, etc. 



B. Water: color, transparency, temperature, chemical character, etc. 



C. Bottom: (describe by layers the places selected for study). 



D. Vegetation: give the percentage areas covered by principal dominant t>pes 



by submerged vegetation and by open water. 



E. Miscellaneous: 



(a) Pollution: sources, nature. 



(b) Other artificial alterations — drainage ditches and other constructions. 



B. ASSOCIATION STUDIES 



Study 7 



POND LIFE 



Work Program: 



1. A trip to a pond for: 



A. Individual hand picking and dip net collecting. 



B. Seine, sieve net and weed ring collecting. 



2. A laboratory examination of the catch. 



3. Reading in the Life of Inland Waters, pp. 314 to 341. 



For Record include: 



1. The name of the pond and a brief statement of its location and chief physical 



characteristics — area, depth, transparency, etc. 



2. An annotated list of the organisms collected, arranged under the following column 



headings : 



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

 etc. 



A. Seed plants — emergent — floating — submerged. 



B. Algae — microscopic ones, only when these appear in masses or tinge the 



water with color. 

 Fringing (sessile) algae. 

 Slime-coat algae. 

 Free floating algae. 



