Biweekly Monthly 



Bimonthly 



Figure 3: Time line for sample collection dates in 1997. Tray placement indicated by dots (#) and 

 sample collection indicated by arrow heads (>■). Date flow velocity measurements were taken indicated by 

 asterisk (*). Beginning of the flood event (22 June) indicated by dashed (-) line. Disturbance frequency 

 treatments were replicated twice, two different ways: by same initial dates (dots 1 and 2) and same ending 

 dates (dots 3 and 4). Undisturbed samples were collected on every date. 



Appendix F ♦ F-17 



