Science activity
Science activity #49859, updated 29 April 2022

Resolving Contradictions in Foodweb Support for Native Pelagic Fishes

Description / purpose

Much research in the Delta has focused on foodweb dynamics, stimulated by evidence that low productivity of plankton is linked to declines in several fish species including the endangered delta smelt. Pseudodiaptomus forbesi is the most abundant copepod (small crustaceans) in the Delta in summer. It is an important food source for many fishes and makes up about half of the food of delta smelt. This study focuses on the feeding, reproduction, and growth of copepods as essential foodweb support for fishes. This work investigates four diverse habitats including two open-water channels and two shallow habitats. The researchers will measure copepods┬┤ feeding rates on microscopic plants and animals, and relate feeding to their rates of growth and reproduction. Computer models will be used to estimate their movement and death rates. These results will show the sources of nutrition used for growth and reproduction of these key organisms. Results will inform how food webs respond to large scale changes in the Delta ecosystem, for example, restoration and the Sacramento wastewater treatment plant upgrade.

Linked science activities

None specified

Activity status

  • Awarded / Initiating (2019)
  • In progress / Ongoing (2019 - 2022)
  • Complete

Funding summary

Total allocated funding: $1,807,311

Label Value
Contract # or labor code 18204
Implementing organization University of California - Davis [UC Davis]
Funding organization U.S. Bureau of Reclamation [USBR]
Funding Source Not provided
Date of award 2019-06-30
Date of fiscal year-end Not provided
Total award amount $742,415
State type of obligation Not provided
Federal type of obligation Not provided
Reimbursability Not provided
Procurement mechanism Contracted competitive or direct award
Annual Expenditures

2019 - $134132.00 ()

2020 - $264228.00 ()

2021 - $155628.00 ()

Label Value
Contract # or labor code 18212
Implementing organization San Francisco State University [SFSU]
Funding organization Delta Stewardship Council
Funding Source Delta Stewardship Council - General Fund
Date of award 2019-06-30
Date of fiscal year-end Not provided
Total award amount $1,064,896
State type of obligation Not provided
Federal type of obligation Not provided
Reimbursability Not provided
Procurement mechanism Contracted competitive or direct award
Annual Expenditures

2019 - $356484.00 ()

2020 - $596647.00 ()

2021 - $111764.00 ()

Location

Subbasins
Delta regions

Geographic tags

None specified

Products and outputs

Type Title Products Description Impact
Link Resolving Contradictions in Foodweb Support for Native Pelagic Fishes screenshot of a web-based summary of the project 0 views