PERMFILE133216 - Laserfiche WebLink

Home Browse Search

L, (i.e. rocks, wood debris). All water floe was diverted through the sampling dip- net or graded sieve. Several net samples were composited into a graded sieve. IE the bottom was muddy or margins of the stream were thick with vegetation or algae, then grab samples of each or both were added to the sieve. Once all the samples were obtained, [hen everything [hat could be removed (i.e. large rocks, twigs, etc.) or broken up (mud or sand, etc.) were flushed with an adequate sup- ply of [he flowing water to clean the sample so macroinvertebrate specimens could be picked. Where ample water was not present to clean the sample completely in the field, [hen the mud, vegetative detritus and algal mate were placed in the collection jars to be cleaned in the lab. The more lentic sites (still water) were sampled similarly but grab samples from the bottom, vegetation, and any organism observed were added to the composite sieve. Long-handled dip nets were used to collect benthon, neuston, nekton and plankton samples outside normal reach. . . These dip nets were used to capture the large free swimming varieties observed. Cleaning procedures, as above, were employed if the water source was sufficient. Samples were cleaned in the field as thoroughly as possible. Those with heavy algal mats, detritus, mudballs or heavy sediment were cleaned more thoroughly in the laboratory (March, 1980). The taxa collected are discussed for each sampling site in the results section. Field sorting was accomplished by washing and pick- ing specimens from number 20 and 40 graded brass sieves. Lab cleaning and sort- ing was done in number 50 sieves. Only eight (8) sites, of the nine sampled, provided specimens for taxonomic analyses. Specimens were preserved in the field with 70 percent isopropyl alcohol in glass jars. After sorting and picking, spe- cimens were stored in glass specimen tubes. Only four (4) samples required extensive laboratory picking and sorting. Taxonomy work was done by biologists at Trapper Mine with verification of diffi- cult specimens by Keefe (1980) and Mariah (1980). r~ U J -5