CDPHE: CDPHE Multihabitat Invert:  Semi-quantitative invertebrate sample collection of soft-bottomed streams using a modified kick net

  • Summary
  • Analytes
  • Revision
  • Data and Sites
Official Method Name
 Benthic Macroinvertebrate Sampling Protocols, WQCDSOP-001, Multihabitat Method
Current Revision
2010
Media
 Biological  (Waterbody type - Wadeable stream)
Instrumentation
 Invertebrate Net (w/ handle)
Method Subcategory
 Population/Community
Method Source
  CDPHE
Citation
  Nonpoint source project monitoring and assessment
Protocol
 CDPHE Invert Protocols - Collection and Preservation of Benthic Macroinvertebrates
Brief Method Summary
 Semi-quantitative sample collection of soft-bottomed streams that focuses collecting macroinvertebrates from non-riffle/run habitats, such as vegetated bank margins, submerged woody debris or snags and aquatic macrophytes. These samples are generally collected using a jab or sweeping technique that utilizes the same modified kick net.

Semi-quantitative sample collection methods are designed to collect the widest variety of aquatic macroinvertebrates available at the study reach. For these methods, it is not necessary to know the exact area sampled. Both procedures are suitable for use with both relative abundance and fixed count processing protocols from which a variety of species richness and relative abundance metrics and multimetric predictive model analysis can be calculated.

In soft-bottomed streams or those streams predominated by substrate smaller than sand size, a single sample shall consist of several individual sweeps or jabs collected from a fixed area of approximately 1 m2. The multihabitat sampling effort is limited to 1 minute. Time spent traversing from one habitat type to another is not included in the total time.
Scope and Application
 This method is to be used in circumstances where hard-bottomed or cobble substrates represent less than 20% of the study reach.
Applicable Concentration Range
Interferences
Quality Control Requirements
Sample Handling
Maximum Holding Time
Relative Cost
 Unknown
Sample Preparation Methods
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