Daren M Carlisle, Ph.D.
Science and Products
Design tradeoffs for trend assessment in aquatic biological monitoring programs
Assessments of long-term (multiyear) temporal trends in biological monitoring programs are generally undertaken without an adequate understanding of the temporal variability of biological communities. When the sources and levels of variability are unknown, managers cannot make informed choices in sampling design to achieve monitoring goals in a...
Gurtz, Martin E.; Van Sickle, John; Carlisle, Daren; Paulsen, Steven G.
River flow changes related to land and water management practices across the conterminous United States
The effects of land and water management practices (LWMP)—such as the construction of dams and roads—on river flows typically have been studied at the scale of single river watersheds or for a single type of LWMP. For the most part, assessments of the relative effects of multiple LWMP within many river watersheds across regional and national...
Eng, Ken; Wolock, David M.; Carlisle, Daren Predicting the likelihood of altered streamflows at ungauged rivers across the conterminous United States
An approach is presented in this study to aid water-resource managers in characterizing streamflow alteration at ungauged rivers. Such approaches can be used to take advantage of the substantial amounts of biological data collected at ungauged rivers to evaluate the potential ecological consequences of altered streamflows. National-scale random...
Eng, Ken; Carlisle, Daren; Wolock, David M.; Falcone, James A.
The quality of our Nation’s waters--ecological health in the Nation's streams, 1993-2005
This report summarizes a national assessment of the ecological health of streams done by the U.S. Geological Survey's (USGS) National Water-Quality Assessment Program (NAWQA). Healthy functioning stream ecosystems provide society with many benefits, including water purification, flood control, nutrient recycling, waste decomposition, fisheries,...
Carlisle, Daren; Meador, Michael R.; Short, Terry M.; Tate, Cathy M.; Gurtz, Martin E.; Bryant, Wade L.; Falcone, James A.; Woodside, Michael D.
Ecological health in the Nation's streams
Aquatic biological communities, which are collections of organisms, are a direct measure of stream health because they indicate the ability of a stream to support life. This fact sheet highlights selected findings of a national assessment of stream health by the National Water-Quality Assessment (NAWQA) Program of the U.S. Geological Survey (USGS...
Carlisle, Daren; Woodside, Michael D. Predicting thermal reference conditions for USA streams and rivers
Temperature is a primary driver of the structure and function of stream ecosystems. However, the lack of stream temperature (ST) data for the vast majority of streams and rivers severely compromises our ability to describe patterns of thermal variation among streams, test hypotheses regarding the effects of temperature on macroecological patterns...
Hill, Ryan A.; Hawkins, Charles P.; Carlisle, Daren Relations between altered stramflow variability and fish assemblages in Eastern USA streams
Although altered streamflow has been implicated as a major factor affecting fish assemblages, understanding the extent of streamflow alteration has required quantifying attributes of the natural flow regime. We used predictive models to quantify deviation from expected natural streamflow variability for streams in the eastern USA. Sites with >...
Meador, Michael R.; Carlisle, Daren Variance partitioning of stream diatom, fish, and invertebrate indicators of biological condition
Stream indicators used to make assessments of biological condition are influenced by many possible sources of variability. To examine this issue, we used multiple-year and multiple-reach diatom, fish, and invertebrate data collected from 20 least-disturbed and 46 developed stream segments between 1993 and 2004 as part of the US Geological Survey...
Zuellig, Robert E.; Carlisle, Daren; Meador, Michael R.; Potapova, Marina
Development and application of indices to assess the condition of benthic algal communities in U.S. streams and rivers
Multi-metric indices (MMIs) are a measure of a combination of characteristics of biological communities and are used as indicators of water quality and ecological health. Although MMIs for algal communities have been developed for specific regions of the United States, none of the indices have national applicability. The MMIs described in this...
Potapova, Marina; Carlisle, Daren Alteration of streamflow magnitudes and potential ecological consequences: A multiregional assessment
Human impacts on watershed hydrology are widespread in the US, but the prevalence and severity of stream-flow alteration and its potential ecological consequences have not been quantified on a national scale. We assessed streamflow alteration at 2888 streamflow monitoring sites throughout the conterminous US. The magnitudes of mean annual (1980–...
Carlisle, Daren; Wolock, David M.; Meador, Michael R. The relative importance of physicochemical factors to stream biological condition in urbanizing basins: Evidence from multimodel inference
Many physicochemical factors potentially impair stream ecosystems in urbanizing basins, but few studies have evaluated their relative importance simultaneously, especially in different environmental settings. We used data collected in 25 to 30 streams along a gradient of urbanization in each of 6 metropolitan areas (MAs) to evaluate the relative...
Carlisle, Daren; Bryant, Wade L. GAGES: A stream gage database for evaluating natural and alteredflow conditions in the conterminous United States
Stream flow is a controlling element in the ecology of rivers and streams. Knowledge of the natural flow regime facilitates the assessment of whether specific hydrologic attributes have been altered by humans in a particular stream and the establishment of specific goals for stream-flow restoration. Because most streams are ungaged or have been...
Falcone, James A.; Carlisle, Daren; Wolock, David M.; Meador, Michael R.