Ian R Waite (Former Employee)
Science and Products
Below are data created by Ian Waite.
Below are publications authored by Ian Waite.
Filter Total Items: 42
Correspondence of biological condition models of California streams at statewide and regional scales Correspondence of biological condition models of California streams at statewide and regional scales
We used boosted regression trees (BRT) to model stream biological condition as measured by benthic macroinvertebrate taxonomic completeness, the ratio of observed to expected (O/E) taxa. Models were developed with and without exclusion of rare taxa at a site. BRT models are robust, requiring few assumptions compared with traditional modeling techniques such as multiple linear regression...
Authors
Jason T. May, Larry R. Brown, Andrew C. Rehn, Ian R. Waite, Peter R Ode, Raphael D Mazor, Kenneth C Schiff
A survey of benthic sediment contaminants in reaches of the Columbia River Estuary based on channel sedimentation characteristics A survey of benthic sediment contaminants in reaches of the Columbia River Estuary based on channel sedimentation characteristics
While previous studies have documented contaminants in fish, sediments, water, and wildlife, few specifics are known about the spatial distribution of contaminants in the Columbia River Estuary (CRE). Our study goal was to characterize sediment contaminant detections and concentrations in reaches of the CRE that were concurrently being sampled to assess contaminants in water...
Authors
Timothy D. Counihan, Ian R. Waite, Elena B. Nilsen, Jill M. Hardiman, Edwin Elias, Guy Gelfenbaum, Steven D. Zaugg
Contaminants of legacy and emerging concern in largescale suckers (Catostomus macrocheilus) and the foodweb in the lower Columbia River, Oregon and Washington, USA Contaminants of legacy and emerging concern in largescale suckers (Catostomus macrocheilus) and the foodweb in the lower Columbia River, Oregon and Washington, USA
We investigated occurrence, transport pathways, and effects of polybrominated diphenyl ether (PBDE) flame retardants and other endocrine disrupting chemicals (EDCs) in aquatic media and the foodweb in the lower Columbia River. In 2009 and 2010, foodweb sampling at three sites along a gradient of contaminant exposure near Skamania (Washington), Columbia City (Oregon) and Longview...
Authors
Elena B. Nilsen, Steven D. Zaugg, David A. Alvarez, Jennifer L. Morace, Ian R. Waite, Timothy D. Counihan, Jill M. Hardiman, Leticia Torres, Reynaldo Patino, Matthew G. Mesa, Robert Grove
Agricultural disturbance response models for invertebrate and algal metrics from streams at two spatial scales within the U.S. Agricultural disturbance response models for invertebrate and algal metrics from streams at two spatial scales within the U.S.
As part of the USGS study of nutrient enrichment of streams in agricultural regions throughout the United States, about 30 sites within each of eight study areas were selected to capture a gradient of nutrient conditions. The objective was to develop watershed disturbance predictive models for macroinvertebrate and algal metrics at national and three regional landscape scales to obtain a...
Authors
Ian R. Waite
Aquatic ecosystems as indicators of status and trends in water quality Aquatic ecosystems as indicators of status and trends in water quality
This chapter provides an introduction and overview of the use of aquatic ecosystems as indicators of water quality. The monitoring of biological communities (fish, algae, and invertebrates) as a means of assessing water quality conditions is emphasized along with ecotoxicological studies and measures of ecosystem function. Issues related to the design, implementation, and analysis of...
Authors
Thomas F. Cuffney, Jonathan G. Kennen, Ian R. Waite
Development and application of an agricultural intensity index to invertebrate and algal metrics from streams at two scales Development and application of an agricultural intensity index to invertebrate and algal metrics from streams at two scales
Research was conducted at 28-30 sites within eight study areas across the United States along a gradient of nutrient enrichment/agricultural land use between 2003 and 2007. Objectives were to test the application of an agricultural intensity index (AG-Index) and compare among various invertebrate and algal metrics to determine indicators of nutrient enrichment nationally and within three...
Authors
Ian R. Waite
Science and Products
Below are data created by Ian Waite.
Below are publications authored by Ian Waite.
Filter Total Items: 42
Correspondence of biological condition models of California streams at statewide and regional scales Correspondence of biological condition models of California streams at statewide and regional scales
We used boosted regression trees (BRT) to model stream biological condition as measured by benthic macroinvertebrate taxonomic completeness, the ratio of observed to expected (O/E) taxa. Models were developed with and without exclusion of rare taxa at a site. BRT models are robust, requiring few assumptions compared with traditional modeling techniques such as multiple linear regression...
Authors
Jason T. May, Larry R. Brown, Andrew C. Rehn, Ian R. Waite, Peter R Ode, Raphael D Mazor, Kenneth C Schiff
A survey of benthic sediment contaminants in reaches of the Columbia River Estuary based on channel sedimentation characteristics A survey of benthic sediment contaminants in reaches of the Columbia River Estuary based on channel sedimentation characteristics
While previous studies have documented contaminants in fish, sediments, water, and wildlife, few specifics are known about the spatial distribution of contaminants in the Columbia River Estuary (CRE). Our study goal was to characterize sediment contaminant detections and concentrations in reaches of the CRE that were concurrently being sampled to assess contaminants in water...
Authors
Timothy D. Counihan, Ian R. Waite, Elena B. Nilsen, Jill M. Hardiman, Edwin Elias, Guy Gelfenbaum, Steven D. Zaugg
Contaminants of legacy and emerging concern in largescale suckers (Catostomus macrocheilus) and the foodweb in the lower Columbia River, Oregon and Washington, USA Contaminants of legacy and emerging concern in largescale suckers (Catostomus macrocheilus) and the foodweb in the lower Columbia River, Oregon and Washington, USA
We investigated occurrence, transport pathways, and effects of polybrominated diphenyl ether (PBDE) flame retardants and other endocrine disrupting chemicals (EDCs) in aquatic media and the foodweb in the lower Columbia River. In 2009 and 2010, foodweb sampling at three sites along a gradient of contaminant exposure near Skamania (Washington), Columbia City (Oregon) and Longview...
Authors
Elena B. Nilsen, Steven D. Zaugg, David A. Alvarez, Jennifer L. Morace, Ian R. Waite, Timothy D. Counihan, Jill M. Hardiman, Leticia Torres, Reynaldo Patino, Matthew G. Mesa, Robert Grove
Agricultural disturbance response models for invertebrate and algal metrics from streams at two spatial scales within the U.S. Agricultural disturbance response models for invertebrate and algal metrics from streams at two spatial scales within the U.S.
As part of the USGS study of nutrient enrichment of streams in agricultural regions throughout the United States, about 30 sites within each of eight study areas were selected to capture a gradient of nutrient conditions. The objective was to develop watershed disturbance predictive models for macroinvertebrate and algal metrics at national and three regional landscape scales to obtain a...
Authors
Ian R. Waite
Aquatic ecosystems as indicators of status and trends in water quality Aquatic ecosystems as indicators of status and trends in water quality
This chapter provides an introduction and overview of the use of aquatic ecosystems as indicators of water quality. The monitoring of biological communities (fish, algae, and invertebrates) as a means of assessing water quality conditions is emphasized along with ecotoxicological studies and measures of ecosystem function. Issues related to the design, implementation, and analysis of...
Authors
Thomas F. Cuffney, Jonathan G. Kennen, Ian R. Waite
Development and application of an agricultural intensity index to invertebrate and algal metrics from streams at two scales Development and application of an agricultural intensity index to invertebrate and algal metrics from streams at two scales
Research was conducted at 28-30 sites within eight study areas across the United States along a gradient of nutrient enrichment/agricultural land use between 2003 and 2007. Objectives were to test the application of an agricultural intensity index (AG-Index) and compare among various invertebrate and algal metrics to determine indicators of nutrient enrichment nationally and within three...
Authors
Ian R. Waite