Endangered winter-run Chinook salmon rely on diverse rearing habitats in a highly altered landscape

Phillis, Corey C.; Sturrock, Anna M.; Johnson, Rachel C.; Weber, Peter K.

doi:10.1016/j.biocon.2017.10.023

Cited by 55 publications

(66 citation statements)

References 24 publications

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“…Accuracy and reproducibility of the LA-MC-ICP-MS analysis were evaluated using an in-house isotopic reference material, a marine aragonite otolith (ear stone) from a White Seabass (Atractoscion nobilis) named SBO, collected offshore Baja California. Replicate analyses for the otolith yielded a mean 87 Sr/ 86 Sr isotope ratio of 0.70916 ± 0.00013 (n = 70, ±2σ) This value is in good agreement with the global average 87 Sr/ 86 Sr isotope value of modern seawater, 0.70918 48 , and compares well to values previously produced in this laboratory [48][49][50] . MPI DING iRM StHs6/80-G (St. Helens Andesitic Ash Glass) and in-house White Sturgeon (Acipenser transmontanus) pectoral fin ray named 'SSFR' (from Sterling Caviar Aqua Farm, CA, USA) were also measured in this study.…”

Section: Methodssupporting

confidence: 84%

Magmatic volatiles episodically flush oceanic hydrothermal systems as recorded by zoned epidote

Fox

Katzir

Bach

et al. 2020

Commun Earth Environ

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Circulation of seawater at oceanic spreading centers extracts heat, drives rock alteration, and transports leached metals to shallower levels of the crust, where they may precipitate and form ore deposits. Crystallization of the lower crust, may exsolve and introduce magmatic volatiles into the seawater-dominant system. However, the role of magmatic volatiles added to the hydrothermal system, including pathways of these fluids are lesser known. Here we present coupled in-situ strontium isotope and rare earth element data of distinct domains in epidote, a common hydrothermal mineral throughout the Troodos ophiolite, to track magmatic fluid input and flow. Epidote crystal domains characterize three distinct strontium isotope-rare earth element signatures—suggesting sequential growth from magma-derived fluids (0.704, negative europium anomalies), rock-buffered fluids (0.7055, positive europium anomalies) and seawater-derived fluids (0.7065, negative cerium anomalies). Epidote records episodic fluxing of magmatic fluids from plagiogranites, through epidosites in the upflow zone and into metal ore deposits.

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Section: Methodssupporting

confidence: 84%

Magmatic volatiles episodically flush oceanic hydrothermal systems as recorded by zoned epidote

Fox

Katzir

Bach

et al. 2020

Commun Earth Environ

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show abstract

“…We also incorporated aspects of directional movement, because juvenile salmon must eventually move downstream through the river network to enter the ocean. We permitted upstream migrations by juvenile fish during freshwater residence (Anderson, Kiffney, Pess, & Quinn, ; Phillis, Sturrock, Johnson, & Weber, ), but long upstream migrations were penalized relative to short distance movements (~ <10 km). Additionally, we also modelled movements as autocorrelated in time, where a fish's location at a particular time‐step was dependent on where it was predicted to be previously.…”

Section: Methodsmentioning

confidence: 99%

Quantifying habitat use of migratory fish across riverscapes using space‐time isotope models

2019

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Migratory animals pose difficult challenges to conservation and management because identifying critical habitats used throughout their lives is rarely possible. Endogenous tracers (e.g. isotope ratios) recorded in sequentially growing biogenic tissues, however, represent a potential source of unique insights at the more elusive temporal and spatial scales central to understanding the ecology of mobile species. To this end, a general probabilistic framework has emerged that quantitatively compares predictive models of isotopic variation across landscapes (called isoscapes) to the isotopic composition recorded in a biological tissue to determine the provenance and movements of animals throughout their lives. Although this spatially continuous approach to isotope‐based geographic assignment is becoming more common across taxa and ecosystems, adopting this framework to take advantage of serial isotope records stored within sequentially growing biogenic tissues (e.g. teeth or otoliths) is less common. Here, we construct a novel space‐time isotope model of provenance (STIMP) that determines the habitat use through time of migratory fish across river basins. To do so, this model integrates: strontium isotope (87Sr/86Sr) ratios across a riverscape, the serial records of 87Sr/86Sr within otoliths, habitat geomorphology and the directional movement patterns of fish through river networks. To illustrate an application of the model, we applied it to a published dataset from Chinook salmon (Oncorhynchus tshawytscha) harvested in 2011 during a coastal fishery in Bristol Bay, Alaska, U.S.A. Using this model, we show how individuals exploit an array of habitat types to achieve their juvenile growth prior to ocean migration, and that the intensity of habitat use among habitat types across the basin shifts spatially over the course of freshwater residence (e.g. from headwaters to migration corridors). The STIMP presented here integrates diverse information sources to reveal the cryptic juvenile movement patterns of a highly migratory species, providing new insights critical to their conservation. This general framework is applicable to any migratory taxa that use isotopically heterogeneous landscapes during their lives and record such variation in sequentially growing biogenic tissues.

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“…Such habitat and food supply enhance juvenile salmon growth, compared to the nearby mainstem Sacramento River (Figure 9) (Sommer et al 2001;Jeffres et al 2008;Henery et al 2010). Ephemeral and intermittent streams show a seasonality similar to floodplains and may also be important habitats for California salmon and trout (Limm and Marchetti 2009;Hwan et al 2017;Phillis et al 2018).…”

Section: Lost Habitatmentioning

confidence: 99%

“…Seasonally-flowing streams may be another important habitat for refuge and food supply for young salmon in some years (Maslin et al 1996Limm and Marchetti 2009;Phillis et al 2018). There is substantial evidence from the Pacific Northwest that restoration of tidal marsh in the estuary could also generate major food-web benefits (Shreffler et al 1990;Miller and Simenstad 1997;Bottom et al 2005).…”

Section: Actions To Facilitate Salmon Resilience To Climate Variabilitymentioning

confidence: 99%

Managing for Salmon Resilience in California’s Variable and Changing Climate

Herbold

Carlson

Henery

et al. 2018

SFEWS

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Endangered winter-run Chinook salmon rely on diverse rearing habitats in a highly altered landscape

Cited by 55 publications

References 24 publications

Magmatic volatiles episodically flush oceanic hydrothermal systems as recorded by zoned epidote

Magmatic volatiles episodically flush oceanic hydrothermal systems as recorded by zoned epidote

Quantifying habitat use of migratory fish across riverscapes using space‐time isotope models

Managing for Salmon Resilience in California’s Variable and Changing Climate

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