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R08-9,010610 PC 284 HabEval Pt2
Handle: Document-67438
Owner: Brown, Don (User-14, brownd:DocuShare)DS
Thursday, January 7, 2010 08:45:08 AM CST
Thursday, January 7, 2010 09:09:45 AM CST
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  • collected in the CAWS are from the order Diptera, and almost all are in the family
Chironomidae.
  • The presence of intolerant benthic EPT taxa in
Hester-Dendy samples and the absence of EPT taxa in Ponar samples suggest sediment toxicity to mayfly, stonefly, and caddisfly larvae.
  • The Hester-Dendy technique is sampling a population that is less exposed to
environmental stress than the ponar sampling technique, which samples invertebrate communities in direct contact with sediments.
  • LimnoTech Page 102
The process involves three major elements: 1.
  • Sequential reduction of the list of habitat variables using qualitative screening,
correlation analysis, and principle components...
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