EIP 1970-2020

    

IEP News

  • Breaking News!
    • Save the Dates: March 22 - 24, 2022 for the 2022 IEP Annual Workshop. This will now be a virtual workshop. Subscribe to our IEP Annual Workshop Listserv to receive future updates on this event!
    • Experimental Release of Delta smelt into the Wild for the First Time (PDF) - During the week of December 17, 2021, the U.S. Fish and Wildlife Service, the California Department of FIsh and Wildlife, the California Department of Water Resources, the U.S. Bureau of Reclamation along with our partners at U.S. Geological Survey and UC Davis, experimentally released captively produced Delta smelt into the Sacramento-San Joaquin River Delta. Photos and videos from the release can be viewed and downloaded from the U.S. Fish and Wildlife Service's California-Great Basin Region Flickr page.
    • The two latest editions of the IEP Newsletter - Volume 40, Issue 1 (Supplemental) and Volume 40, Issue 2 - are now available! Visit our IEP Newsletter page for more information. Don't forget to subscribe to our Newsletter list so you can receive the next edition in your mailbox. If you want to receive updates on other IEP products, visit our subscription page to sign up for all of them at one time. The next issue of the newsletter will be edited by the USFWS and submissions are due by October 15, 2021. Contact Geoff Steinhart (Geoffrey_Steinhart@fws.gov) for questions on submitting an article.
    • Biologists from California State Parks, the Interagency Ecological Program, and other agencies have identified a new weed in the Delta. The species is Ribbon Weed (Vallisneria australis). A Ribbon Weed Fact Sheet (PDF) provides more information on how to recognize it and report it. So far, it has been documented at Rio Vista Delta Marina Yacht Harbor, Long Island, Hogback Island Boat Launch, Liberty Island, Mokelumne River near Lighthouse Marina, and Sherman Lake. Please report any sightings to Trish Gilbert (Patricia.Gilbert@parks.ca.gov) at the California Department of Parks and Recreation, Division of Boating and Waterways.
  • Featured Survey
    • Now that we’re moving into the fall a number of our fish species are on the move, maturing, and getting ready for colder temperatures and spawning. The IEP has kept track of status and trends for lots of species in the Estuary using the Fall Midwater Trawl (FMWT). This survey targets communities of fish using nets chosen for the midwaters of the Estuary, and results have been used for many purposes, including indexing rare and endangered species within the Delta and surrounding waterways.
  • Featured Publications
    • Where fish feed and grow effects population performance – Spatial heterogeneity underlies growth rate differences in Delta Smelt in this paper from Lewis and colleagues from the Marine Ecology Progress Series.
    • Steelhead juvenile outmigration survival – Rebecca Buchanan and colleagues use acoustic telemetry to document outmigration survival of juvenile steelhead and offer perspectives on continued recovery efforts for this species. Their work appears in the Canadian Journal of Fisheries and Aquatic Sciences.
    • How to survive a warming climate? – In this article in Nature Climate Change, Cordoleani and others describe and examine the use of a late-migration strategy for juvenile spring-run Chinook salmon in California’s Central Valley.
    • Complex habitat interactions form the background for considering conservation of estuarine species like those found in the San Francisco Estuary – Feyer, Young, Huntsman, and Brown publish their study in Marine and Coastal Fisheries: Dynamics, Management, and Ecosystem Science.
    • Feeding habits and novel prey of larval fishes in the northern San Francisco Estuary is the title of this study from Jungbluth and colleagues published earlier this year in Environmental DNA.
    • IEP Technical Reports Available
  • Featured Dataset Publication on EDI
    • Gilbert, M.D., L. Smith, G. Steinhart, and IEP. 2021. Interagency Ecological Program and US Fish and Wildlife Service: Juvenile/Larval Fish and Zooplankton collections at Liberty Island, California 2002-2005 & 2013-2019 ver 1. Environmental Data Initiative.
      • Abstract: The U.S. Fish and Wildlife Service (USFWS) Lodi Fish and Wildlife Office (LFWO) Delta Juvenile Fish Monitoring Program (DJFMP) has intermittently sampled Liberty Island with various equipment since 2002. Liberty Island was a reclaimed agricultural island until it flooded in 1997-1998 and we subsequently left to passively restore as a tidally influenced wetland. Larval trawls and beach were the only sampling methods used during both early (2002-2005) and late (2009-2019) sampling periods. The main purpose of the sampling was to gather information about fish presence and abundance in Liberty Island during the passive restoration, with an emphasis on reproductive and early life-stages of native species. Larval trawls, or tow nets, were used to catch larval fish in 2004-2005 and again from 2013-2019. Zooplankton nets were used 2013-2019. Water quality measurements were collected alongside each tow.
  • Check out the IEP Calendar for upcoming Project Work Team, Stakeholder Group meetings and other IEP related events!
    • January 20 Estuarine Ecology Team PWT Meeting 9:00 a.m. - 12:00 p.m.
    • January 26 Zooplankton PWT Meeting 1:30 p.m. - 3:30 p.m.
    • January 27 Aquatic Vegetation PWT Meeting 1:00 p.m. - 4:00 p.m.
    • February 2 Biotelemetry PWT Meeting 9:00 a.m. - 12:00 p.m.
    • February 9 PWT Chairs & Stakeholder Meeting 1:30 p.m. - 3:30 p.m.
    • February 15 Genetics PWT Meeting 1:00 p.m. - 3:00 p.m.
  • Other Events or News
    • Delta Science Program - National Center for Ecological Analysis and Synthesis (DSP-NCEAS) 2021 Synthesis Working Group This working group provides high-quality training in synthetic data science and statistical techniques and offers an opportunity for enhanced collaboration between agency and academic scientists. The group leverages training and a collaborative setting to analyze drivers of the Delta's estuarine food supply. Products from this working group will offer strong scientific support to inform decision-making for restoration, the protection of endangered species, and the management of flow actions. More information about the effort, including resources developed during the 2021 Synthesis Workshop can be found on the DSP-NCEAS web page.
    • The recording of the Delta Smelt Individual Based Model Workshop is now available. This is the first of two planned workshops on the updated Delta Smelt Individual Based Model (DSIBM) developed jointly by USFWS' San Francisco Bay Delta Fish and Wildlife Office, University of Maryland Center for Environmental Science (UMCES), and San Francisco State University Estuary & Ocean Science Center. The newly updated DSIBM expanded its capacity to evaluate effects of environmental variables, proposed long-term water operation plans (e.g., flow and entrainment), and other management actions (e.g., hatchery delta smelt supplementation, food enhancement, habitat restoration) on delta smelt population dynamics.
    • Until further notice IEP meetings/gatherings are being held remotely/virtually.
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