Presentation Abstract

Puget Sound is a large and productive estuarine system at the southern end of the Salish Sea. King County’s comprehensive, long-term marine monitoring program tracks water quality in Puget Sound’s Central Basin through year-round collection of data for a suite of physical, chemical and biological parameters. Phytoplankton monitoring began with traditional microscopy methods in 2008, and expanded to include a particle imaging system in 2014. These data are critical to assess how changes from climate, physical conditions and other stressors linked to anthropogenic activity from the region’s growing population may impact the Sound’s biodiversity and trophic structure. Currently, twice-monthly surface water samples from 10 Central Basin locations (Point Wells to East Passage) are analyzed year round by FlowCAM, an imaging particle analyzer operating in the 10–300 µm particle range. Phytoplankton particle size, abundance and biovolume are quantified for sixty taxonomic categories. Additionally, zooplankton composition and abundance data are available at select stations. Given the considerable changes in physical conditions recorded for the Salish Sea in the last several years, such as higher than normal temperatures beginning in late 2014, data analysis has focused on key water column indicators (temperature, salinity, nutrients) and weather/climate patterns as drivers of phytoplankton abundance and community composition. Our data reveal important spatial differences within the Central Basin as well as inter-annual differences in seasonal succession patterns of phytoplankton species. These findings contribute to our understanding of the dynamics of Puget Sound phytoplankton communities in relation to environmental and biological drivers.

Session Title

Interdisciplinary Approaches to Understanding Eutrophication and Over-enrichment of Nutrients in Puget Sound and Effects on Marine Species

Keywords

Monitoring, Phytoplankton, Puget Sound

Conference Track

SSE16: Long-Term Monitoring of Salish Sea Ecosystems

Conference Name

Salish Sea Ecosystem Conference (Seattle, WA : 2018)

Document Type

Event

SSEC Identifier

SSE16-102

Start Date

6-4-2018 9:15 AM

End Date

6-4-2018 9:30 AM

Type of Presentation

Oral

Contributing Repository

Digital content made available by University Archives, Heritage Resources, Western Libraries, Western Washington University.

Geographic Coverage

Salish Sea (B.C. and Wash.)

Rights

This resource is displayed for educational purposes only and may be subject to U.S. and international copyright laws. For more information about rights or obtaining copies of this resource, please contact University Archives, Heritage Resources, Western Libraries, Western Washington University, Bellingham, WA 98225-9103, USA (360-650-7534; heritage.resources@wwu.edu) and refer to the collection name and identifier. Any materials cited must be attributed to the Salish Sea Ecosystem Conference Records, University Archives, Heritage Resources, Western Libraries, Western Washington University.

Type

text

Language

English

Format

application/pdf

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Apr 6th, 9:15 AM Apr 6th, 9:30 AM

Long-term monitoring in Central Puget Sound: Are local climate anomalies impacting phytoplankton populations?

Puget Sound is a large and productive estuarine system at the southern end of the Salish Sea. King County’s comprehensive, long-term marine monitoring program tracks water quality in Puget Sound’s Central Basin through year-round collection of data for a suite of physical, chemical and biological parameters. Phytoplankton monitoring began with traditional microscopy methods in 2008, and expanded to include a particle imaging system in 2014. These data are critical to assess how changes from climate, physical conditions and other stressors linked to anthropogenic activity from the region’s growing population may impact the Sound’s biodiversity and trophic structure. Currently, twice-monthly surface water samples from 10 Central Basin locations (Point Wells to East Passage) are analyzed year round by FlowCAM, an imaging particle analyzer operating in the 10–300 µm particle range. Phytoplankton particle size, abundance and biovolume are quantified for sixty taxonomic categories. Additionally, zooplankton composition and abundance data are available at select stations. Given the considerable changes in physical conditions recorded for the Salish Sea in the last several years, such as higher than normal temperatures beginning in late 2014, data analysis has focused on key water column indicators (temperature, salinity, nutrients) and weather/climate patterns as drivers of phytoplankton abundance and community composition. Our data reveal important spatial differences within the Central Basin as well as inter-annual differences in seasonal succession patterns of phytoplankton species. These findings contribute to our understanding of the dynamics of Puget Sound phytoplankton communities in relation to environmental and biological drivers.