Complex Tidal Marsh Dynamics Structure Fish Foraging Patterns In The San Francisco Estuary

Colombano, Denise D.; Handley, Thomas B.; O’Rear, Teejay A.; Durand, John R.; Moyle, Peter B.

doi:10.1007/s12237-021-00896-4

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Complex Tidal Marsh Dynamics Structure Fish Foraging Patterns In The San Francisco Estuary

2021
By Colombano, Denise D. ; Handley, Thomas B. ; O’Rear, Teejay A. ; ...
Source: Estuaries and Coasts, 44:1604–1618

[PDF-2.67 MB]

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Details:

Journal Title:

Estuaries and Coasts
Personal Author:

Colombano, Denise D. ; Handley, Thomas B. ; O’Rear, Teejay A. ; Durand, John R. ; Moyle, Peter B.

Colombano, Denise D. ; Handley, Thomas B. ; O’Rear, Teejay A. ; Durand, John R. ; Moyle, Peter B. Less -
NOAA Program & Office:

OAR (Oceanic and Atmospheric Research) ; Sea Grant

OAR (Oceanic and Atmospheric Research) ; Sea Grant Less -
Sea Grant Program:

CASG/CUIMR (California Sea Grant)
Description:

Mechanisms driving the consumption and transport of tidal marsh nutrients and energy by fishes are of key interest in the San

Francisco Estuary, CA, USA. By combining multiple data sources (gill-net catches, gut contents, channel morphology, tides), we

modeled spatial and temporal patterns of fish abundance and gut fullness across a tidal marsh elevation gradient. Channel depth,

microhabitat, and tide were important predictors of fish abundance and gut fullness. Species, feeding guild, and season were also

important to fish abundance but not to gut fullness, suggesting that abundance was more related to physical constraints of shallow

water than to prey availability. Multiple feeding guilds overlapped in space and time at interaction hotspots in subtidal channel

habitat near the marsh entrance. In contrast, fish use of shallow intertidal marsh channels was more variable and indicated

tradeoffs between foraging and predation. Gut content analysis revealed moderate-to-high gut fullness for all feeding guilds

and models predicted high gut fullness in subtidal reaches during tidal flooding, after which fish fed intensively throughout the

marsh. While mysids, amphipods, and detritus were common prey among feeding guilds, variation in prey consumption was

apparent. Overall, complex tidal marsh hydrogeomorphology driving land-water exchange and residence time may diversify and

enhance benthic and pelagic food web pathways to fishes and invertebrates. Furthermore, these findings substantiate the notion

that dynamic tidal marshes in this system can support robust secondary production, foraging by multiple feeding guilds, and

trophic transfer by fishes to the estuarine mosaic.
Keywords:

[+]

Estuaries Fishes Food Salt Marsh Ecology
Source:

Estuaries and Coasts, 44:1604–1618
DOI:

https://doi.org/10.1007/s12237-021-00896-4
Document Type:

Journal Article
Place as Subject:

San Francisco Bay Area (Calif.)
Rights Information:

CC BY
Compliance:

Submitted
Main Document Checksum:

[+]

urn:sha256:ca9a5b460ed43fb5f53ce6ec3b469a2a40ae93a1a451f72915b1bb999f1ac0f0
Download URL:

https://repository.library.noaa.gov/view/noaa/43100/noaa_43100_DS1.pdf
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Complex Tidal Marsh Dynamics Structure Fish Foraging Patterns In The San Francisco Estuary

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