Annual IEP Workshop

The informal event is held each spring for sharing new research results that advance science important to IEP and the larger Delta science community. The workshop features invited speakers, interactive sessions, poster session, and an early career luncheon for early career professionals.

2024 IEP Annual Workshop

SAVE THE DATES April 18 and April 23-25, 2024!

The 2024 Annual IEP Workshop will be held April 23-25, 2024 at the California Natural Resources Headquarters building (715 P Street).

The workshop will be a FREE hybrid event (in-person + remote). Separate registration required for both in-person and remote attendance.

A remote-only Data training course will be held the week before the workshop on April 18. Registration information coming soon!

Workshop Registration

Workshop registration opens March 15, 2024!

There will be two types of registration for the workshop: In-person attendance and remote attendance.

There will be a separate registration process to attend the remote April 18 data training and the April 23 Early Career Luncheon .

In-Person Attendance

Registration to attend the workshop in-person at the CNRA auditorium will be managed through EventBrite.

  • You'll need to register for each day of the workshop you want to attend (e.g., Tuesday, Wednesday and/or Thursday).
  • Registration is on a first-come, first-serve basis.
  • Registration closes April 8 or once all tickets are gone, whichever comes first.

Remote Attendance

Registration to attend the workshop remotely will be managed through Zoom.

  • You only need to register once for the entire workshop. The Zoom link will be good for the entire workshop period (April 23-25).
  • A Zoom link will be emailed to registrants. This link is specific to the registered user, so don't share with others.
  • Registration for remote attendance via Zoom will open March 15, 2024 and remain open through the end of the workshop.

Early Career Scientists Mentor Luncheon

An Early Career luncheon will be hosted on Tuesday, April 23 from 12:15 p.m. to 1:45 p.m. Registration will be required to attend as seating is limited.

  • Registration to attend in-person will be available through EventBrite as part of the in-person workshop registration.
  • Registration to attend the virtual luncheon will be set-up separately. More information coming soon on the virtual luncheon!

Data Training Course

A remote-only Data training course will be held the week before the workshop on April 18 from 9:00 a.m. to 3:00 p.m..

Course topics will focus on:

  • Data Management
  • Coded Data Access
  • Metadata and Data Publication
  • Visualization and Communication of Data

Registration for the training day is required. Registration will be separate from the regular workshop.

More information on registration, specific data courses, and the instructors will be coming soon!

Workshop Program

The 2024 Workshop Program and Abstract Booklet will be available soon!

The 2024 Workshop will include 15 program sessions and a one-day remote Data training course (occurs week before workshop on April 18).

Program Overview

April 18: Data Management, Visualization, and Access Training Courses

  • Data Management
  • Coded Data Access
  • Metadata and Data Publication
  • Visualization and Communication of Data
  • Panel Q&A

April 23: Workshop Day 1

  • Session 1: Welcome and Plenary with Steve Culberson, IEP Lead Scientist
  • Session 2: Physical and Biological Effects of Flow
  • Session 3: Posters
  • Early Career Luncheon (registration required)
  • Session 4: Reconnecting Delta Food Webs
  • Session 5: Phytoplankton and Nutrients

April 24: Workshop Day 2

  • Session 6: Welcome and Plenary with Felicia Marcus
  • Session 7: Smelt Supplementation
  • Poetry Slam
  • Session 8: Posters
  • Session 9: Wetlands & Floodplains: Advancements in Monitoring and Restoration
  • Session 10: Lightning Talks

April 25: Workshop Day 3

  • Session 11: Welcome and Plenary with Anke Mueller-Solger
  • Session 12: New and Improved Longfin Smelt Science and Monitoring
  • Session 13: So Many Fishes
  • Session 14: Salmonid Habitat: Monitoring and Modeling
  • Session 15: Troubled Waters: Stressors and Aquatic Organisms
  • Early Career Awards & Closing Remarks


Questions regarding the workshop can be directed to and Rosemary Hartman at

Workshop Recordings

Recordings from previous IEP Workshops are housed on the California Department of Fish and Wildlife's YouTube Channel (videos). The 2023 Workshop can be found under the IEP Workshops 2023 Playlist.

Past Workshops

2023 Annual Workshop

The 2023 Annual IEP Workshop took place at the California Natural Resources Agency (CNRA) Headquarters building (715 P Street, Sacramento, CA) from March 21-24. Below are materials from the workshop:

Recordings of the 3-day IEP Workshop are housed on the CDFW YouTube channel under the IEP Workshops 2023 Playlist (videos).

2022 Annual Workshop

The 2022 IEP Annual Workshop took place as a virtual Zoom Webinar event that was held from March 22 - 24.

The workshop was recorded and the session videos were posted on YouTube for viewing until June 30, 2022.

2021 Annual Workshop

The 2021 IEP Annual Workshop was a track within the 11th Biennial Bay-Delta Science Conference. Registration of the event was managed by the Delta Stewardship Council. The theme of the conference was "Building Resilience through Diversity in Science". With presenter permission, selected talk recordings have been made available on the Bay Delta Science conference platform. The IEP Track Session and presentations were the following:

Tuesday, April 6, 2021 IEP Special Session

The Value of Long-Term Biological Monitoring in the San Francisco Estuary Moderator: Jim Hobbs, CDFW

  • The Value of Long-Term Monitoring of the San Francisco Estuary for Delta Smelt and Longfin Smelt - Speaker: Trishelle Tempel, CDFW
  • The Influence of Environmental Conditions in Long Term Fish Abundance Data - Speaker: James White, CDFW
  • Invasion of the Water Board Snatchers: Tridentiger Trends from the San Francisco Bay Study and Summer Townet Survey - Speaker: Timothy Davis Malinich, CDFW
  • Fish Food, Outflow, and Management Implications: The Values of Long-term Zooplankton Monitoring in the SFE - Speaker: Arthur Barros, CDFW
  • The Value of Long-Term Zooplankton Monitoring for Detecting Impacts of the Suisun Marsh Salinity Control Gate Managed Flow Action - Speaker: Christina Burdi, CDFW

Wednesday, April 7, 2021 IEP Session

Success at Different Trophic Levels: Gaining Insight from Nutrients to Otoliths Moderator: Stephanie Fong, CDFW

  • A View from the Landscape Scale: Using Spatial Variation of Nutrients and Phytoplankton Across the Delta to Identify Underlying Biogeochemical Processes - Speaker: Brian Bergamaschi, USGS
  • Nine Years of Flow Pulses: A Synthesis of Water Quality, Plankton Subsidies and Fish Communities in the North Delta - Speakers: Brittany Davis, DWR; Laura Twardochleb, DWR
  • I'm Not That Shallow - Surprising Similarity in Zooplankton Communities Collected at Different Depths Near Wetland Restoration Sites - Speaker: Rosemary Hartman, DWR
  • Every Cog and Wheel: Understanding the Importance of Genomic Diversity in Central Valley Chinook Salmon - Speaker: Mariah Meek, Michigan State University
  • Years in Their Ears: What Can Fish Earbones Tell Us About Spring-run Chinook Salmon Success in an Increasingly Volatile Climate? - Speaker: Flora Cordoleani, UC Santa Cruz/NOAA

Thursday, April 8, 2021 IEP Session

Fish Habitat Spatial Arrangements: Experience from Across the Estuary and Beyond Moderator: Christine Joab, CDFW

  • Four Decades of Juvenile Fish Responses to Hydroclimate: Advancing a State-Space Modeling Approach in the San Francisco Estuary - Speaker: Denise Colombano, UC Berkeley
  • Space Jam: A Spatially Explicit History of Estuary Fish Species - Speaker: Dylan Stompe, UC Davis
  • Suisun Marsh on the Edge of Resilience in an Era of Rapid Change - Speaker: John Durand, UC Davis
  • Differences Between Surface and Bottom Temperatures in the Upper San Francisco Estuary: Implications for Temperature Refugia - Speaker: Brian Mahardja, US Bureau of Reclamation
  • Investigating Longfin Smelt Utilization of Coastal Estuaries North of the San Francisco Estuary - Speaker: Colin Brennan, ICF

Friday, April 9, 2021 IEP Session

Using Aquatic Surveys for Estimation and Communication: Bias, Quantification, and Display  Moderator: Steve Culberson, IEP Lead Scientist

  • Relative Catchability Bias Among Sampling Gears for Fish Species within the San Francisco Estuary - Speaker: Brock Huntsman, USGS
  • Let's Stop Guessing: Using Quantitative Tools Developed During Long-term Monitoring Review to Evaluate Survey Regime Alterations - Speaker: Jereme Gaeta, CDFW
  • Quantifying Changes in Gear Efficiency to Reduce Bias in Estimating Long-term Abundance Trends - Speaker: Bryan Matthias, US Fish and Wildlife Service
  • Real Time Tidal Excursion Mapping and Constituent Tracking, Fishery Surveys and Tools to Support Tidally Influenced Pelagic Habitat Identification - Speaker: David Osti, 34 North
  • Web Based Approaches to Fisheries Data Communication - Speaker: Tom Pham, UC Santa Cruz/NOAA

2020 Annual Workshop

The 2020 IEP Annual Workshop took place remotely on Zoom as individual sessions that were held from August 25 through October 3, 2020.

2019 Annual Workshop

The 2019 IEP Annual Workshop was held at the Lake Natoma Inn on March 5 through March 7, 2019.

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Participants in the CNRA Auditorium at the 2023 IEP Workshop.
Workshop presentation in the CNRA auditorium. CDFW photo.
Participants in the poster room at the 2023 IEP Workshop.
Workshop participants attending the poster session. CDFW photo.