Climate, seabirds, forage, and upwelling ecosystems

William J. Sydeman

President and Senior Scientist

Farallon Institute


Wednesday, September 7, 2016
Pacific Forum—11:00 a.m.

Upwelling ecosystems provide vital services to society, yet are at risk due to increasing stratification, acidification, and deoxygenation, and changes in mixing. Unprecedented variation in fisheries and other aspects of the pelagic ecosystem of the central California Current System (CCS) has prompted renewed attention on upwelling, its drivers, and change relative to global warming. I review the unusual ecosystem variability that prompted new explanations for change focused on the timing and intensity of upwelling off California. Winds appear to be changing in other upwelling ecosystems as well. The extent to which biophysical changes in the CCS results apply to other upwelling systems is now under investigation (California – Benguela Joint Investigation). Upwelling-favorable winds appear to be increasing in sectors of each ecosystem, but in the CCS forage fish productivity has been affected, whereas in the Benguela, redistributions appear to be the dominant patterns of response with cascading effects to seabirds.

Print Version (PDF)

NextSeptember 28, Francis Wiese


Data repository
Data policy
What is happening in Monterey Bay today?
Central and Northern California Ocean Observing System
Chemical data
Ocean float data
Slough data
Mooring ISUS measurements
Southern Ocean Data
Mooring data
M1 Mooring Summary Data
M1 Asimet
M1 Download Info
M1 EMeter
M1 Fluorometer (CeNCOOS)
Molecular and genomics data
ESP Web Portal
Seafloor mapping
Upper ocean data
Spatial Temporal Oceanographic Query System (STOQS) Data
Image gallery
Video library
Previous seminars
David Packard Distinguished Lecturers
Research software
Video Annotation and Reference System
System Overview
Annotation Interface
Video Tape User Guide
Video File User Guide
Annotation Glossary
Query Interface
Basic User Guide
Advanced User Guide
Query Glossary
VARS Publications
Oceanographic Decision Support System
MB-System seafloor mapping software
How to Download and Install MB-System
MB-System Documentation
MB-System Announcements
MB-System Announcements (Archive)
MB-System FAQ
MB-System Discussion Lists
MB-System YouTube Tutorials
Matlab scripts: Linear regressions
Introduction to Model I and Model II linear regressions
A brief history of Model II regression analysis
Index of downloadable files
Summary of modifications
Regression rules of thumb
Results for Model I and Model II regressions
Graphs of the Model I and Model II regressions
Which regression: Model I or Model II?
Matlab scripts: Oceanographic calculations
Matlab scripts: Sound velocity
Visual Basic for Excel: Oceanographic calculations
Educational resources
MBARI Summer Internship Program
2017 Summer Interns Blog
Education and Research: Testing Hypotheses (EARTH)
EARTH workshops
2016—New Brunswick, NJ
2015—Newport, Oregon
2016 Satellite workshop—Pensacola, FL
2016 Satellite workshop—Beaufort, NC
EARTH resources
EARTH lesson plans
Lesson plans—published
Lesson plans—development
Lesson drafts—2015
Lesson drafts—2016 Pensacola
Adopt-A-Float Program
Center for Microbial Oceanography: Research and Education (C-MORE) Science Kits
Sample archive