Little Rock Creek was listed as a Minnesota 303(d) impaired water in 2004, resulting in a TMDL
(total maximum daily load) study for aquatic life due to the lack of a cold water fish assemblage.
Data presented in this report provide biological survey summary information on the stream
community associated with Little Rock Creek (LRC), local habitat measurements, and land
use/land cover characteristics of the watershed in an effort to identify causes of impairment. This
report will describe the biotic stream community and quantify potential relationships among
landuse characteristics, local habitat conditions, and biotic assemblages including fish, and
macroinvertebrates. This report will focus on trends in the macroinvertebrate and fish
communities (abundance and functional traits), physicochemical, and local habitat conditions
from five sample locations within the Little Rock Creek watershed (Fig. 1a,b). Additional data is
provided by the Minnesota Pollution Control Agency (MPCA), and an earlier Natural Resources
Research Institute (NRRI) study, for the purpose of regional comparisons (hereafter referred to
as ‘MPCA and/or NRRI regional comparison sites;’ Figs. 2,3). Data collected by the MPCA
between 1996-2006 includes 16 streams in the same area as the TMDL sites. A 1998 sampling
efforts at 18 streams (c.f., Hutchens et al. 2009) in southeastern Minnesota were conducted in a
heavily agricultural area to determine landuse/landscape interactions with macroinvertebrate and
Breneman, Dan; Brady, Valerie; Hollenhorst, Thomas; Johnson, Lucinda B.
Little Rock Creek Biological Survey, Habitat Evaluation, and GIS Analysis.
University of Minnesota Duluth.
Retrieved from the University of Minnesota Digital Conservancy,
Content distributed via the University of Minnesota's Digital Conservancy may be subject to additional license and use restrictions applied by the depositor.