Lisa V. Lucas
Lisa Lucas is a Research General Engineer with the USGS Water Resources Mission Area.
INTEGRATES physics with biology, and mathematical models with field observations, to understand how aquatic ecosystems work
COLLABORATES with scientists of multiple disciplines to implement a whole-ecosystem “climate to the clams” approach for understanding how complex aquatic systems may respond to changes in climate, management and infrastructure over this century (CASCaDE project)
- Applies engineering training to study how environmental fluid dynamics interacts with and drives water quality and ecological processes
- Thinks of herself as an "Ecohydrodynamicist", but her friends call her things like "Hydro-phydamicist" (which she doesn't mind).
- Focus is largely on tidal systems, with some work applying generally to rivers and lakes
- Develops and applies models across the spectrum of simple algebraic relationships on up to 3D numerical models of coupled hydrodynamics and ecological processes at ecosystem scale
- Loved being brought up in USGS as a member of Jim Cloern's Plankton Dynamics Team
- Graduate work at Stanford University in the Environmental Fluid Mechanics Laboratory (Dept. of Civil and Environmental Engineering) with Professors Jeff Koseff and Stephen Monismith
- Undergrad alma mater is University of Notre Dame (the one in South Bend, Indiana)--GO IRISH!
- Situated within the USGS Water Resources Mission Area in the Integrated Modeling & Prediction Division/Earth Systems Modeling Branch
Science and Products
CASCaDE: Computational Assessments of Scenarios of Change for the Delta Ecosystem
The Delta of the Sacramento and San Joaquin rivers provides drinking water supplies to two-thirds of Californians, and is a fragile ecosystem home to threatened and endangered species. The CASCaDE project builds on several decades of USGS science to address the goals of achieving water supply reliability and restoring the ecosystems in the Bay-Delta system.
Filter Total Items: 22
Simple relationships between residence time and annual nutrient retention, export, and loading for estuaries
Simple mathematical models are derived from mass balances for water and transported substance to provide insight into the relationships between import, export, transport, and internal removal for nonconservative substances in an estuary. Extending previous work, our models explicitly include water and substance inputs from the ocean and are expressed in terms of timescales (i.e., mean residence ti
Authors
Jian Shen, Jiabi Du, Lisa Lucas
Tracers and timescales: Tools for distilling and simplifying complex fluid mechanical problems
No abstract available.
Authors
Lisa Lucas, Eric Deleersnijder
Toward improved decision-support tools for Delta Smelt management actions
The Collaborative Science and Adaptive Management Program (CSAMP) has endorsed a goal of reversing the recent downward trajectory of the Delta Smelt population within 5-10 generations, with the long-term aim of establishing a self-sustaining population. An ambitious agenda of management actions is planned, and more management actions are being considered. This White Paper furthers one of the recom
Authors
Denise Reed, Shawn Acuna, Eli Ateljevich, Larry R. Brown, Ben Geske, Edward Gross, Jim Hobbs, Wim J. Kimmerer, Lisa Lucas, Matthew Nobriga, Kenneth A Rose
Timescale methods for simplifying, understanding and modeling biophysical and water quality processes in coastal aquatic ecosystems: A review
In this article, we describe the use of diagnostic timescales as simple tools for illuminating how aquatic ecosystems work, with a focus on coastal systems such as estuaries, lagoons, tidal rivers, reefs, deltas, gulfs, and continental shelves. Intending this as a tutorial as well as a review, we discuss relevant fundamental concepts (e.g., Lagrangian and Eulerian perspectives and methods, parcels
Authors
Lisa Lucas, Eric Deleersnijder
What determines water temperature dynamics in the San Francisco Bay-Delta system?
Water temperature is an important factor determining estuarine species habitat conditions. Water temperature is mainly governed by advection (e.g., from rivers) and atmospheric exchange processes varying strongly over time (day-night, seasonally) and the spatial domain. On a long time scale, climate change will impact water temperature in estuarine systems due to changes in river flow regimes, air
Authors
Julia Vroom, Mick Van der Wegen, Rosanne C. Martyr-Koller, Lisa Lucas
Application of an unstructured 3D finite volume numerical model to flows and salinity dynamics in the San Francisco Bay-Delta
A linked modeling approach has been undertaken to understand the impacts of climate and infrastructure on aquatic ecology and water quality in the San Francisco Bay-Delta region. The Delft3D Flexible Mesh modeling suite is used in this effort for its 3D hydrodynamics, salinity, temperature and sediment dynamics, phytoplankton and water-quality coupling infrastructure, and linkage to a habitat suit
Authors
R.C. Martyr-Koller, H.W.J. Kernkamp, Anne A. Van Dam, Mick van der Wegen, Lisa Lucas, N. Knowles, B. Jaffe, T.A. Fregoso
Bivalve grazing can shape phytoplankton communities
The ability of bivalve filter feeders to limit phytoplankton biomass in shallow waters is well-documented, but the role of bivalves in shaping phytoplankton communities is not. The coupled effect of bivalve grazing at the sediment-water interface and sinking of phytoplankton cells to that bottom filtration zone could influence the relative biomass of sinking (diatoms) and non-sinking phytoplankton
Authors
Lisa Lucas, James E. Cloern, Janet K. Thompson, Mark T. Stacey, Jeffrey K. Koseff
Changing restoration rules: exotic bivalves interact with residence time and depth to control phytoplankton productivity
Non-native species are a prevalent ecosystem stressor that can interact with other stressors to confound resource management and restoration. We examine how interactions between physical habitat attributes and a particular category of non-native species (invasive bivalves) influence primary production in aquatic ecosystems. Using mathematical models, we show how intuitive relationships between phy
Authors
Lisa V. Lucas, Janet K. Thompson
Why are diverse relationships observed between phytoplankton biomass and transport time?
Transport time scales such as flushing time and residence time are often used to explain variability in phytoplankton biomass. In many cases, empirical data are consistent with a positive phytoplankton‐transport time relationship (i.e., phytoplankton biomass increases as transport time increases). However, negative relationships, varying relationships, or no significant relationship may also be ob
Authors
Lisa V. Lucas, Janet K. Thompson, Larry R. Brown
Shallow water processes govern system-wide phytoplankton bloom dynamics: A modeling study
A pseudo-two-dimensional numerical model of estuarine phytoplankton growth and consumption, vertical turbulent mixing, and idealized cross-estuary transport was developed and applied to South San Francisco Bay. This estuary has two bathymetrically distinct habitat types (deep channel, shallow shoal) and associated differences in local net rates of phytoplankton growth and consumption, as well as d
Authors
L.V. Lucas, Jeffrey R. Koseff, Stephen G. Monismith, J.K. Thompson
Shallow water processes govern system-wide phytoplankton bloom dynamics: A field study
Prior studies of the phytoplankton dynamics in South San Francisco Bay, California, USA have hypothesized that bivalve filter-feeders are responsible for the limited phytoplankton blooms in the system. This study was designed to examine the effects of benthic grazing and light attenuation on this shallow, turbid, and nutrient replete system. We found that grazing by shallow water bivalves was impo
Authors
J.K. Thompson, Jeffrey R. Koseff, Stephen G. Monismith, L.V. Lucas
Population density, biomass, and age-class structure of the invasive clam Corbicula fluminea in rivers of the lower San Joaquin River watershed, California
Corbicula fluminea is well known as an invasive filter-feeding freshwater bivalve with a variety of effects on ecosystem processes. However, C. fluminea has been relatively unstudied in the rivers of the western United States. In June 2003, we sampled C. fluminea at 16 sites in the San Joaquin River watershed of California, which was invaded by C. fluminea in the 1940s. Corbicula fluminea was comm
Authors
Larry R. Brown, Janet K. Thompson, K. Higgins, Lisa V. Lucas
Science and Products
CASCaDE: Computational Assessments of Scenarios of Change for the Delta Ecosystem
The Delta of the Sacramento and San Joaquin rivers provides drinking water supplies to two-thirds of Californians, and is a fragile ecosystem home to threatened and endangered species. The CASCaDE project builds on several decades of USGS science to address the goals of achieving water supply reliability and restoring the ecosystems in the Bay-Delta system.
Filter Total Items: 22
Simple relationships between residence time and annual nutrient retention, export, and loading for estuaries
Simple mathematical models are derived from mass balances for water and transported substance to provide insight into the relationships between import, export, transport, and internal removal for nonconservative substances in an estuary. Extending previous work, our models explicitly include water and substance inputs from the ocean and are expressed in terms of timescales (i.e., mean residence ti
Authors
Jian Shen, Jiabi Du, Lisa Lucas
Tracers and timescales: Tools for distilling and simplifying complex fluid mechanical problems
No abstract available.
Authors
Lisa Lucas, Eric Deleersnijder
Toward improved decision-support tools for Delta Smelt management actions
The Collaborative Science and Adaptive Management Program (CSAMP) has endorsed a goal of reversing the recent downward trajectory of the Delta Smelt population within 5-10 generations, with the long-term aim of establishing a self-sustaining population. An ambitious agenda of management actions is planned, and more management actions are being considered. This White Paper furthers one of the recom
Authors
Denise Reed, Shawn Acuna, Eli Ateljevich, Larry R. Brown, Ben Geske, Edward Gross, Jim Hobbs, Wim J. Kimmerer, Lisa Lucas, Matthew Nobriga, Kenneth A Rose
Timescale methods for simplifying, understanding and modeling biophysical and water quality processes in coastal aquatic ecosystems: A review
In this article, we describe the use of diagnostic timescales as simple tools for illuminating how aquatic ecosystems work, with a focus on coastal systems such as estuaries, lagoons, tidal rivers, reefs, deltas, gulfs, and continental shelves. Intending this as a tutorial as well as a review, we discuss relevant fundamental concepts (e.g., Lagrangian and Eulerian perspectives and methods, parcels
Authors
Lisa Lucas, Eric Deleersnijder
What determines water temperature dynamics in the San Francisco Bay-Delta system?
Water temperature is an important factor determining estuarine species habitat conditions. Water temperature is mainly governed by advection (e.g., from rivers) and atmospheric exchange processes varying strongly over time (day-night, seasonally) and the spatial domain. On a long time scale, climate change will impact water temperature in estuarine systems due to changes in river flow regimes, air
Authors
Julia Vroom, Mick Van der Wegen, Rosanne C. Martyr-Koller, Lisa Lucas
Application of an unstructured 3D finite volume numerical model to flows and salinity dynamics in the San Francisco Bay-Delta
A linked modeling approach has been undertaken to understand the impacts of climate and infrastructure on aquatic ecology and water quality in the San Francisco Bay-Delta region. The Delft3D Flexible Mesh modeling suite is used in this effort for its 3D hydrodynamics, salinity, temperature and sediment dynamics, phytoplankton and water-quality coupling infrastructure, and linkage to a habitat suit
Authors
R.C. Martyr-Koller, H.W.J. Kernkamp, Anne A. Van Dam, Mick van der Wegen, Lisa Lucas, N. Knowles, B. Jaffe, T.A. Fregoso
Bivalve grazing can shape phytoplankton communities
The ability of bivalve filter feeders to limit phytoplankton biomass in shallow waters is well-documented, but the role of bivalves in shaping phytoplankton communities is not. The coupled effect of bivalve grazing at the sediment-water interface and sinking of phytoplankton cells to that bottom filtration zone could influence the relative biomass of sinking (diatoms) and non-sinking phytoplankton
Authors
Lisa Lucas, James E. Cloern, Janet K. Thompson, Mark T. Stacey, Jeffrey K. Koseff
Changing restoration rules: exotic bivalves interact with residence time and depth to control phytoplankton productivity
Non-native species are a prevalent ecosystem stressor that can interact with other stressors to confound resource management and restoration. We examine how interactions between physical habitat attributes and a particular category of non-native species (invasive bivalves) influence primary production in aquatic ecosystems. Using mathematical models, we show how intuitive relationships between phy
Authors
Lisa V. Lucas, Janet K. Thompson
Why are diverse relationships observed between phytoplankton biomass and transport time?
Transport time scales such as flushing time and residence time are often used to explain variability in phytoplankton biomass. In many cases, empirical data are consistent with a positive phytoplankton‐transport time relationship (i.e., phytoplankton biomass increases as transport time increases). However, negative relationships, varying relationships, or no significant relationship may also be ob
Authors
Lisa V. Lucas, Janet K. Thompson, Larry R. Brown
Shallow water processes govern system-wide phytoplankton bloom dynamics: A modeling study
A pseudo-two-dimensional numerical model of estuarine phytoplankton growth and consumption, vertical turbulent mixing, and idealized cross-estuary transport was developed and applied to South San Francisco Bay. This estuary has two bathymetrically distinct habitat types (deep channel, shallow shoal) and associated differences in local net rates of phytoplankton growth and consumption, as well as d
Authors
L.V. Lucas, Jeffrey R. Koseff, Stephen G. Monismith, J.K. Thompson
Shallow water processes govern system-wide phytoplankton bloom dynamics: A field study
Prior studies of the phytoplankton dynamics in South San Francisco Bay, California, USA have hypothesized that bivalve filter-feeders are responsible for the limited phytoplankton blooms in the system. This study was designed to examine the effects of benthic grazing and light attenuation on this shallow, turbid, and nutrient replete system. We found that grazing by shallow water bivalves was impo
Authors
J.K. Thompson, Jeffrey R. Koseff, Stephen G. Monismith, L.V. Lucas
Population density, biomass, and age-class structure of the invasive clam Corbicula fluminea in rivers of the lower San Joaquin River watershed, California
Corbicula fluminea is well known as an invasive filter-feeding freshwater bivalve with a variety of effects on ecosystem processes. However, C. fluminea has been relatively unstudied in the rivers of the western United States. In June 2003, we sampled C. fluminea at 16 sites in the San Joaquin River watershed of California, which was invaded by C. fluminea in the 1940s. Corbicula fluminea was comm
Authors
Larry R. Brown, Janet K. Thompson, K. Higgins, Lisa V. Lucas