Table 1. Percentage compoBitlan by weight of the fine gravel-very fine sand 

 substrate fractions In Ponar grab samples. 



Pine Ooarsa HadlUi rln« v«xy tijtm 



cpravel sand auid aand uad 



(«.0-2.0ii>e) (l.a-O.San) (O.S-0.}SaB) (a.2S-O.I2SaB) (O.I2S-O.Oe^B) 



1980 

 9 June 

 21 July 

 14 October 



29.7 



S3.4 



11.1 



25.0 



S3.7 



11.7 



20.0 



63.S 



11.4 



19B1 

 10 June 

 14 July 

 B October 



21.6 



61.8 



10.6 



18.8 



66.6 



13.3 



17.6 



65-.e 



14.1 



Table 2. Results of Friedman's test collaring partlcle-slze 

 distribution among grab sai^les taken at station 1 

 on transects I to VI. 



Sampling 

 data 



Mlnlmua level 



Significance 



1980 



9 June 

 21 July 



14 October 

 1981 



10 June 

 14 July 



8 October 



4.383 



0.50 



1.419 



0.95 



2.103 



0.90 



0.336 



0.999 



3.813 



0.75 



0.621 



0.99 



Table 3. Results of Friedman's teat caa^arlng particle-size 

 distribution among grab samples taken at stations 

 1 to 4 combined on transects I to VI. 



Sampling 

 date 



Minimum level 



Significance 



1980 



9 June 

 21 July 



14 October 

 1981 



10 June 

 14 July 



3 October 



1.989 



0.90 



3.471 



0.75 



1.875 



0.90 



1.562 

 3.813 



4.497 



0.95 

 0.75 

 0.50 



17 



