Event Title

Using benthic foraminifera to track acidification in the Salish Sea

Presentation Abstract

This project uses benthic foraminifera as a proxy for low pH in Puget Sound sediments over a temporal range from 1974 to the present. Here we report preliminary results of our investigation. Benthic foraminifera occur as agglutinate and calcareous forms; calcareous foraminifera biomineralize their shells from calcium carbonate and are thus a sink for carbon in the oceans. Both agglutinate and calcareous foraminifera are consumed by a wide variety of mobile benthic invertebrates and bottom feeding fish, therefore they are an important component near the base of the food chain. They are excellent study organisms because they are small (typically

Investigations into foraminiferal assemblages in different embayments throughout Puget Sound indicate that partial dissolution of shells is widespread. In places, 100% of all calcareous individuals show signs of dissolution, e.g. pitting, holes, loss of surface layers. Some sediment samples, most notably those from areas with sluggish circulation, have only agglutinate foraminifera. The three most common calcareous foraminifera species in Puget Sound, Elphidiella hannai, Cribroelphidium excavatum and Buccella frigida all show partial dissolution, however, E. hannai is most heavily impacted, suggesting it is more susceptible to dissolution than other species.

Session Title

Ocean Acidification in the Salish Sea

Conference Track

Climate Change and Ocean Acidification

Conference Name

Salish Sea Ecosystem Conference (2016 : Vancouver, B.C.)

Document Type

Event

Location

2016SSEC

Type of Presentation

Poster

Contributing Repository

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

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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Using benthic foraminifera to track acidification in the Salish Sea

2016SSEC

This project uses benthic foraminifera as a proxy for low pH in Puget Sound sediments over a temporal range from 1974 to the present. Here we report preliminary results of our investigation. Benthic foraminifera occur as agglutinate and calcareous forms; calcareous foraminifera biomineralize their shells from calcium carbonate and are thus a sink for carbon in the oceans. Both agglutinate and calcareous foraminifera are consumed by a wide variety of mobile benthic invertebrates and bottom feeding fish, therefore they are an important component near the base of the food chain. They are excellent study organisms because they are small (typically

Investigations into foraminiferal assemblages in different embayments throughout Puget Sound indicate that partial dissolution of shells is widespread. In places, 100% of all calcareous individuals show signs of dissolution, e.g. pitting, holes, loss of surface layers. Some sediment samples, most notably those from areas with sluggish circulation, have only agglutinate foraminifera. The three most common calcareous foraminifera species in Puget Sound, Elphidiella hannai, Cribroelphidium excavatum and Buccella frigida all show partial dissolution, however, E. hannai is most heavily impacted, suggesting it is more susceptible to dissolution than other species.