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Chlorophyll and carbohydrate content of sediment core tops from San Pablo Bay and Grizzly Bay, California, 2019-2020

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Created:	Sep 13, 2024 at 10:38 p.m.
Last updated:	Mar 12, 2025 at 4:12 p.m.
Published date:	Mar 12, 2025 at 4:12 p.m.
DOI:	10.4211/hs.fcfd37788e9a4d5c96fa4006d7178ee2
Citation:	See how to cite this resource

Sharing Status:	Published
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Abstract

Sediment core tops collected during summer of 2019 and winter of 2020 in the shallows of San Pablo and Grizzly Bays were analyzed for chlorophyll and carbohydrate content as part of a study to investigate how hydrodynamic forcing and sediment properties influence sediment erodibility. This data is presented here.

Subject Keywords

Coverage

Spatial

Coordinate System/Geographic Projection:

WGS 84 EPSG:4326

Coordinate Units:

Decimal degrees

Place/Area Name:

Grizzly Bay and San Pablo Bay, California

North Latitude

38.1167°

East Longitude

-122.0410°

South Latitude

38.0836°

West Longitude

-122.3911°

Temporal

Start Date:
End Date:

Content

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Readme.txt

Methods:

Sediment samples were collected with a Gomex box corer deployed from a small vessel at fixed sites 
in Grizzly Bay and San Pablo Bay. Push core subsamples were collected with a 3.7 cm diameter syringe.
The top cm was sectioned off the push cores and immediately placed on dry ice for transport. These 
sections were then stored frozen at −4◦ Celsius prior to analysis. Sediment chlorophyll a and 
pheophytin a content (μg of pigment per g of dry sediment) were measured using U.S. EPA Method 445.0 
(Arar & Collins, 1997). One standard deviation analytical precision as determined by sample-duplicate 
pairs was 0.58 and 0.87 μg/g for chlorophyll a and pheophytin a, respectively. Sediment carbohydrate
content (mg of carbohydrate C per g of dry sediment) was measured using the method of Pakulski and 
Benner (1992). One standard deviation analytical precision as determined by sample-duplicate pairs 
was 0.14 mg/g.

References:

Arar, E., & Collins, G. (1997). Method 445.0 in vitro determination of chlorophyll a
and pheophytin a in marine and freshwater algae by flourescence (Published re
port/methodology). Washington DC, USA: U.S. Environmental Protection Agency.

Pakulski, J. D., & Benner, R. (1992). An improved method for the hydrolysis and MBTH
analysis of dissolved and particulate carbohydrates in seawater. Marine Chemistry,
40, 143–159. doi: 10.1016/0304-4203(92)90020-B

Credits

Funding Agencies

This resource was created using funding from the following sources:

Agency Name	Award Title	Award Number
United States Geological Survey

How to Cite

Fackrell, J. (2025). Chlorophyll and carbohydrate content of sediment core tops from San Pablo Bay and Grizzly Bay, California, 2019-2020, HydroShare, https://doi.org/10.4211/hs.fcfd37788e9a4d5c96fa4006d7178ee2

This resource is shared under the Creative Commons Attribution CC BY.

http://creativecommons.org/licenses/by/4.0/

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