142 



YI< IMK 



5HELFORD. 



dull) sucker and the addition of -nch .1- ilu- black bullhead. 

 Tin- latter is a well-known "mud-lover" which inhabit^ t In- 

 oldest Stiller- 'it pond succession. A- the condition^ which 

 Organisms produced in> d in intensity in the din ciioiis indi- 



d, lln < -illy similar to 'In- tadpole cat and the 



-pot ted 1 in! Ilu .id disappeared, and with them probably tin- golden 

 -hiiu-r aUo. \\"iih th< e we have tin- fKh c-onimunii \ 



which \\as in Pond I i>i lid'orc draining. h i> illustrated by 

 Pond 5'/ also, in which the plant and animal d'-trilu> ha cted 



l-i'. 5. sii.. \\in-j I'.ni'l i i .it moderate !i>\\- \\-ac -t. In contrast wiili i. \v<- 

 li.ii it i- clioki-'l with v^'-uiti'Ci an 1 th- margin ni-riipi;-.! l>\- ^Inuli-- 

 bulrushes. etc. 



bee; i u -.e it is located al the millet \\here the channel becon 

 shallower and nammer. l ; .co!oLical 1 \pe-.siich as thepickenl, 

 the black bullhead, and the mud minnow make up this community 

 in Pond I l. They n-nallv continue until the pond becomes 

 temporary when ilu v are dt -iro\- t -d b\ dr\'in.n'. 



2. The Fll! !<><' of Ilif font!. !'"coloi;y is one of the few biological 

 sciences in which prediction U po-sible. I shall \cntnre lo predict 

 the fate, in a state of nature, oi a pond like Pond i^aivasa\ the 



