Larry Brown (Former Employee)
Science and Products
Filter Total Items: 121
Linking hydrodynamic complexity to delta smelt (Hypomesus transpacificus) distribution in the San Francisco Estuary, USA
Long-term fish sampling data from the San Francisco Estuary were combined with detailed three dimensional hydrodynamic modeling to investigate the relationship between historical fish catch and hydrodynamic complexity. Delta Smelt catch data at 45 stations from the Fall Midwater Trawl (FMWT) survey in the vicinity of Suisun Bay were used to develop a quantitative catch-based station index. This in
Authors
Aaron J. Bever, Michael L. MacWilliams, Bruce Herbold, Larry R. Brown, Frederick V. Feyrer
Coupled downscaled climate models and ecophysiological metrics forecast habitat compression for an endangered estuarine fish
Climate change is driving rapid changes in environmental conditions and affecting population and species’ persistence across spatial and temporal scales. Integrating climate change assessments into biological resource management, such as conserving endangered species, is a substantial challenge, partly due to a mismatch between global climate forecasts and local or regional conservation planning.
Authors
Larry R. Brown, Lisa M Komoroske, R Wayne Wagner, Tara Morgan-King, Jason T. May, Richard E Connon, Nann A. Fangue
Estuarine fish communities respond to climate variability over both river and ocean basins
Estuaries are dynamic environments at the land–sea interface that are strongly affected by interannual climate variability. Ocean–atmosphere processes propagate into estuaries from the sea, and atmospheric processes over land propagate into estuaries from watersheds. We examined the effects of these two separate climate-driven processes on pelagic and demersal fish community structure along the sa
Authors
Frederick V. Feyrer, James E. Cloern, Larry R. Brown, Maxfield Fish, Kathryn Hieb, Randall Baxter
Evaluating the adequacy of a reference site pool for ecological assessments in environmentally complex regions
Many advances in the field of bioassessment have focused on approaches for objectively selecting the pool of reference sites used to establish expectations for healthy waterbodies, but little emphasis has been placed on ways to evaluate the suitability of the reference-site pool for its intended applications (e.g., compliance assessment vs ambient monitoring). These evaluations are critical becaus
Authors
Peter R. Ode, Andrew C. Rehn, Raphael D. Mazor, Kenneth C. Schiff, Eric D. Stein, Jason May, Larry R. Brown, David B. Herbst, D.D. Gillette, Kevin Lunde, Charles P. Hawkins
Assessment of interim flow water-quality data of the San Joaquin River restoration program and implications for fishes, California, 2009-11
After more than 50 years of extensive water diversion for urban and agriculture use, a major settlement was reached among the U.S. Departments of the Interior and Commerce, the Natural Resources Defense Council, and the Friant Water Users Authority in an effort to restore the San Joaquin River. The settlement received Federal court approval in October 2006 and established the San Joaquin River Res
Authors
Marissa L. Wulff, Larry R. Brown
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. The BRT m
Authors
Jason T. May, Larry R. Brown, Andrew C. Rehn, Ian R. Waite, Peter R Ode, Raphael D Mazor, Kenneth C Schiff
An updated conceptual model of Delta Smelt biology: Our evolving understanding of an estuarine fish
The main purpose of this report is to provide an up-to-date assessment and conceptual model of factors affecting Delta Smelt (Hypomesus transpacificus) throughout its primarily annual life cycle and to demonstrate how this conceptual model can be used for scientific and management purposes. The Delta Smelt is a small estuarine fish that only occurs in the San Francisco Estuary. Once abundant, it i
Authors
Randy Baxter, Larry R. Brown, Gonzalo Castillo, Louise Conrad, Steven D. Culberson, Matthew P. Dekar, Melissa Dekar, Frederick Feyrer, Thaddeus Hunt, Kristopher Jones, Joseph Kirsch, Anke Mueller-Solger, Matthew Nobriga, Steven B. Slater, Ted Sommer, Kelly Souza, Gregg Erickson, Stephanie Fong, Karen Gehrts, Lenny Grimaldo, Bruce Herbold
The role of tidal marsh restoration in fish management in the San Francisco Estuary
Tidal marsh restoration is an important management issue in the San Francisco Estuary (estuary). Restoration of large areas of tidal marsh is ongoing or planned in the lower estuary (up to 6,000 ha, Callaway et al. 2011). Large areas are proposed for restoration in the upper estuary under the Endangered Species Act biological opinions (3,237 ha) and the Bay Delta Conservation Plan (26,305 ha). In
Authors
Bruce Herbold, Donald Baltz, Larry R. Brown, Robin Grossinger, Wim J. Kimmerer, Peggy W. Lehman, Charles A. Simenstad, Carl Wilcox, Matthew L. Nobriga
Synthesis of studies in the fall low-salinity zone of the San Francisco Estuary, September-December 2011
In fall 2011, a large-scale investigation (fall low-salinity habitat investigation) was implemented by the Bureau of Reclamation in cooperation with the Interagency Ecological Program to explore hypotheses about the ecological role of low-salinity habitat in the San Francisco Estuary—specifically, hypotheses about the importance of fall low-salinity habitat to the biology of delta smelt Hypomesus
Authors
Larry R. Brown, Randall Baxter, Gonzalo Castillo, Louise Conrad, Steven Culberson, Gregg Erickson, Frederick Feyrer, Stephanie Fong, Karen Gehrts, Lenny Grimaldo, Bruce Herbold, Joseph Kirsch, Anke Mueller-Solger, Steven B. Slater, Ted Sommer, Kelly Souza, Erwin Van Nieuwenhuyse
Stream macroinvertebrate response models for bioassessment metrics: addressing the issue of spatial scale
We developed independent predictive disturbance models for a full regional data set and four individual ecoregions (Full Region vs. Individual Ecoregion models) to evaluate effects of spatial scale on the assessment of human landscape modification, on predicted response of stream biota, and the effect of other possible confounding factors, such as watershed size and elevation, on model performance
Authors
Ian R. White, Jonathan Kennen, Jason T. May, Larry R. Brown, Thomas F. Cuffney, Kimberly A. Jones, James L. Orlando
Enriquillo–Plantain Garden fault zone in Jamaica: paleoseismology and seismic hazard
The countries of Jamaica, Haiti, and the Dominican Republic all straddle the Enriquillo–Plantain Garden fault zone ( EPGFZ), a major left-lateral, strike-slip fault system bounding the Caribbean and North American plates. Past large earthquakes that destroyed the capital cities of Kingston, Jamaica (1692, 1907), and Port-au-Prince, Haiti (1751, 1770), as well as the 2010 Haiti earthquake that kill
Authors
R.D. Koehler, P. Mann, Carol S. Prentice, L. Brown, B. Benford, M. Grandison-Wiggins
Implications for future survival of delta smelt from four climate change scenarios for the Sacramento–San Joaquin Delta, California
Changes in the position of the low salinity zone, a habitat suitability index, turbidity, and water temperature modeled from four 100-year scenarios of climate change were evaluated for possible effects on delta smelt Hypomesus transpacificus, which is endemic to the Sacramento–San Joaquin Delta. The persistence of delta smelt in much of its current habitat into the next century appears uncertain.
Authors
Larry R. Brown, William A. Bennett, R. Wayne Wagner, Tara Morgan-King, Noah Knowles, Frederick Feyrer, David H. Schoellhamer, Mark T. Stacey, Mike Dettinger
Science and Products
Filter Total Items: 121
Linking hydrodynamic complexity to delta smelt (Hypomesus transpacificus) distribution in the San Francisco Estuary, USA
Long-term fish sampling data from the San Francisco Estuary were combined with detailed three dimensional hydrodynamic modeling to investigate the relationship between historical fish catch and hydrodynamic complexity. Delta Smelt catch data at 45 stations from the Fall Midwater Trawl (FMWT) survey in the vicinity of Suisun Bay were used to develop a quantitative catch-based station index. This in
Authors
Aaron J. Bever, Michael L. MacWilliams, Bruce Herbold, Larry R. Brown, Frederick V. Feyrer
Coupled downscaled climate models and ecophysiological metrics forecast habitat compression for an endangered estuarine fish
Climate change is driving rapid changes in environmental conditions and affecting population and species’ persistence across spatial and temporal scales. Integrating climate change assessments into biological resource management, such as conserving endangered species, is a substantial challenge, partly due to a mismatch between global climate forecasts and local or regional conservation planning.
Authors
Larry R. Brown, Lisa M Komoroske, R Wayne Wagner, Tara Morgan-King, Jason T. May, Richard E Connon, Nann A. Fangue
Estuarine fish communities respond to climate variability over both river and ocean basins
Estuaries are dynamic environments at the land–sea interface that are strongly affected by interannual climate variability. Ocean–atmosphere processes propagate into estuaries from the sea, and atmospheric processes over land propagate into estuaries from watersheds. We examined the effects of these two separate climate-driven processes on pelagic and demersal fish community structure along the sa
Authors
Frederick V. Feyrer, James E. Cloern, Larry R. Brown, Maxfield Fish, Kathryn Hieb, Randall Baxter
Evaluating the adequacy of a reference site pool for ecological assessments in environmentally complex regions
Many advances in the field of bioassessment have focused on approaches for objectively selecting the pool of reference sites used to establish expectations for healthy waterbodies, but little emphasis has been placed on ways to evaluate the suitability of the reference-site pool for its intended applications (e.g., compliance assessment vs ambient monitoring). These evaluations are critical becaus
Authors
Peter R. Ode, Andrew C. Rehn, Raphael D. Mazor, Kenneth C. Schiff, Eric D. Stein, Jason May, Larry R. Brown, David B. Herbst, D.D. Gillette, Kevin Lunde, Charles P. Hawkins
Assessment of interim flow water-quality data of the San Joaquin River restoration program and implications for fishes, California, 2009-11
After more than 50 years of extensive water diversion for urban and agriculture use, a major settlement was reached among the U.S. Departments of the Interior and Commerce, the Natural Resources Defense Council, and the Friant Water Users Authority in an effort to restore the San Joaquin River. The settlement received Federal court approval in October 2006 and established the San Joaquin River Res
Authors
Marissa L. Wulff, Larry R. Brown
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. The BRT m
Authors
Jason T. May, Larry R. Brown, Andrew C. Rehn, Ian R. Waite, Peter R Ode, Raphael D Mazor, Kenneth C Schiff
An updated conceptual model of Delta Smelt biology: Our evolving understanding of an estuarine fish
The main purpose of this report is to provide an up-to-date assessment and conceptual model of factors affecting Delta Smelt (Hypomesus transpacificus) throughout its primarily annual life cycle and to demonstrate how this conceptual model can be used for scientific and management purposes. The Delta Smelt is a small estuarine fish that only occurs in the San Francisco Estuary. Once abundant, it i
Authors
Randy Baxter, Larry R. Brown, Gonzalo Castillo, Louise Conrad, Steven D. Culberson, Matthew P. Dekar, Melissa Dekar, Frederick Feyrer, Thaddeus Hunt, Kristopher Jones, Joseph Kirsch, Anke Mueller-Solger, Matthew Nobriga, Steven B. Slater, Ted Sommer, Kelly Souza, Gregg Erickson, Stephanie Fong, Karen Gehrts, Lenny Grimaldo, Bruce Herbold
The role of tidal marsh restoration in fish management in the San Francisco Estuary
Tidal marsh restoration is an important management issue in the San Francisco Estuary (estuary). Restoration of large areas of tidal marsh is ongoing or planned in the lower estuary (up to 6,000 ha, Callaway et al. 2011). Large areas are proposed for restoration in the upper estuary under the Endangered Species Act biological opinions (3,237 ha) and the Bay Delta Conservation Plan (26,305 ha). In
Authors
Bruce Herbold, Donald Baltz, Larry R. Brown, Robin Grossinger, Wim J. Kimmerer, Peggy W. Lehman, Charles A. Simenstad, Carl Wilcox, Matthew L. Nobriga
Synthesis of studies in the fall low-salinity zone of the San Francisco Estuary, September-December 2011
In fall 2011, a large-scale investigation (fall low-salinity habitat investigation) was implemented by the Bureau of Reclamation in cooperation with the Interagency Ecological Program to explore hypotheses about the ecological role of low-salinity habitat in the San Francisco Estuary—specifically, hypotheses about the importance of fall low-salinity habitat to the biology of delta smelt Hypomesus
Authors
Larry R. Brown, Randall Baxter, Gonzalo Castillo, Louise Conrad, Steven Culberson, Gregg Erickson, Frederick Feyrer, Stephanie Fong, Karen Gehrts, Lenny Grimaldo, Bruce Herbold, Joseph Kirsch, Anke Mueller-Solger, Steven B. Slater, Ted Sommer, Kelly Souza, Erwin Van Nieuwenhuyse
Stream macroinvertebrate response models for bioassessment metrics: addressing the issue of spatial scale
We developed independent predictive disturbance models for a full regional data set and four individual ecoregions (Full Region vs. Individual Ecoregion models) to evaluate effects of spatial scale on the assessment of human landscape modification, on predicted response of stream biota, and the effect of other possible confounding factors, such as watershed size and elevation, on model performance
Authors
Ian R. White, Jonathan Kennen, Jason T. May, Larry R. Brown, Thomas F. Cuffney, Kimberly A. Jones, James L. Orlando
Enriquillo–Plantain Garden fault zone in Jamaica: paleoseismology and seismic hazard
The countries of Jamaica, Haiti, and the Dominican Republic all straddle the Enriquillo–Plantain Garden fault zone ( EPGFZ), a major left-lateral, strike-slip fault system bounding the Caribbean and North American plates. Past large earthquakes that destroyed the capital cities of Kingston, Jamaica (1692, 1907), and Port-au-Prince, Haiti (1751, 1770), as well as the 2010 Haiti earthquake that kill
Authors
R.D. Koehler, P. Mann, Carol S. Prentice, L. Brown, B. Benford, M. Grandison-Wiggins
Implications for future survival of delta smelt from four climate change scenarios for the Sacramento–San Joaquin Delta, California
Changes in the position of the low salinity zone, a habitat suitability index, turbidity, and water temperature modeled from four 100-year scenarios of climate change were evaluated for possible effects on delta smelt Hypomesus transpacificus, which is endemic to the Sacramento–San Joaquin Delta. The persistence of delta smelt in much of its current habitat into the next century appears uncertain.
Authors
Larry R. Brown, William A. Bennett, R. Wayne Wagner, Tara Morgan-King, Noah Knowles, Frederick Feyrer, David H. Schoellhamer, Mark T. Stacey, Mike Dettinger
*Disclaimer: Listing outside positions with professional scientific organizations on this Staff Profile are for informational purposes only and do not constitute an endorsement of those professional scientific organizations or their activities by the USGS, Department of the Interior, or U.S. Government