7891

• UCREFRP Catalog Number: 7891
• Author: Vinson, M.
• Title: A Sampling Strategy For Assessing Aquatic Invertebrate Communities Associated With Endangered Fish Populations In The Upper Colorado River Basin.
• USFW Year: 1996.
• USFW - Doc Type: \
• Copyright Material: NO

will be in defining a reasonable set of key habitat types and reaches to sample. In this proposal, I

have described field, laboratory; and office procedures that will allow us to delineate invertebrate

assemblages and better understand their response to changing hydrologic regimes.

Objectives

The listed objectives are designed to descn1>e current macroinvertebrate assemblages and

assess the effects of future conditions on these assemblages.

Objective 1. Determine longitudinal patterns in benthic macroinvertebrate communities.

Objective 2. Identify habitat specific aquatic macroinvertebrate taxa that can be used as
indicators of quality habitat.

Sampling strategy
Community attributes to sample

To adequately understand what factors may be limiting endangered fishes in the Upper

Colorado River Basin will reqw,e monitoring. a variety of ecosystem attributes. Important

attributes to monitor identified by Stanford (l994) were distnoution and abundance of zoo benthos

communities, zooplankton, fish; some measure of the primary producer community, and physical

habitat features. This proposal descn"bes methodology to monitor the abundance and distribution

of benthic macroinvertebrates, standing stock of organic matter; periphyton chlorophyll a

concentration and biomass, and.water temperature.

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