Tidal–hydrological dynamics of water temperature across freshwater forested wetlands on the northeastern Pacific coast

JAWRA Journal of the American Water Resources Association, Journal Year: 2025, Volume and Issue: 61(1)

Published: Jan. 2, 2025

Abstract Tidal freshwater forests were once extensive across temperate coastlines, but loss and fragmentation have made estimation of their ecosystem functions challenging. We measured water temperature for 2 years in three Sitka spruce tidal forests, a restoration site, an adjacent emergent marsh on the Columbia River, Washington, United States. assessed spatial variability within sites including effects hydrology, differences among bay tributary between mainstem Columbia, marsh. The nearest to had lower interior temperatures than channel confluences by up 2.5°C (weekly median temperature) 2.0°C maximum temperature), with most cooling occurring during low‐flow months July–September. Tributary 1.9°C cooler 4.2°C mainstem. Temperatures two decreased −0.16°C/100 m −0.07°C/100 m, average. site smallest within‐site gradient. Differences greatest when range was low, while higher ranges associated warmer more variable interiors relative confluences. These results suggest that these can provide refugia cold biota salmon.

Language: Английский

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Entrainment of fish larvae into Połaniec Power Plant: another considerable threat for the ichthyofauna of the Vistula River (Poland)

Biologia, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 8, 2025

Language: Английский

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From threats to solutions: A literature review of climate adaptation in anadromous salmon and trout

Ecosphere, Journal Year: 2025, Volume and Issue: 16(1)

Published: Jan. 1, 2025

Abstract Understanding the evolutionary responses of anadromous salmon and trout to climate change is critical for effective conservation planning. In this study, we conducted a comprehensive review literature published from 2010 2020 synthesize current knowledge on impacts these fish populations. Specifically, focused 199 papers that explored processes in response changing environmental conditions. Our analysis revealed several key themes, including interwoven influences human activities genetic variation, phenotypic traits, population dynamics. We found geographic patterns diversity are closely linked climatic gradients, highlighting importance strategies variation existing adaptive capacity. Additionally, temporal trends phenology, maturation age, fecundity indicate ongoing plastic change. Importantly, were identified as significant drivers maladaptation emphasize need targeted monitoring specific mitigate loss enhance study underscores identifying protecting areas high rare genes, particularly regions projected experience rapid shifts. conclusion, our findings identify strengths gaps research investigating role dynamics face By capitalizing new tools sequencing, genomic analysis, automated field data collection, can establish baselines tracking Better integration into projections future will lead more ensure long‐term resilience iconic species other wildlife.

Language: Английский

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Seasonal dynamics of juvenile coho salmon (Oncorhynchus kisutch) in wetlands of the North Thompson River, British Columbia

Canadian Journal of Fisheries and Aquatic Sciences, Journal Year: 2025, Volume and Issue: 82, P. 1 - 19

Published: Jan. 1, 2025

Freshwater fish such as juvenile salmon often rely on dynamic and diverse habitats wetlands. Although wetland use is well documented, their of freshwater wetlands in large river networks that vary isolation connection not known. We studied coho three sites along the North Thompson River, British Columbia, Canada, from May 2021 to October 2023 understand how seasonal variation connectivity water quality (temperature dissolved oxygen) influence habitat use. used monthly mark–recapture sampling estimate abundance density. Seasonal growth were intertwined with abiotic conditions. Age-0 recruited during high spring flows year-round. Periods density low oxygen associated lower abundance. Our study also provides information timing habitats, which can be inform managers times year pose greatest risk benefits these fish.

Language: Английский

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Inter-annual dispersal stability within the Atlantic salmon metapopulation from the Bay of Biscay

Fisheries Research, Journal Year: 2025, Volume and Issue: 284, P. 107323 - 107323

Published: March 9, 2025

Language: Английский

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River environment effects on adult migration phenology and rate of spring-run Chinook Salmon

Transactions of the American Fisheries Society, Journal Year: 2025, Volume and Issue: unknown

Published: March 18, 2025

ABSTRACT Objective Our overarching objective was to better understand how river environment affects the migration phenology and behavior of adult Chinook Salmon Oncorhynchus tshawytscha in a watershed (Oregon’s Willamette River basin) where climate warming other habitat impacts threaten spring-run population. Methods We analyzed annual spring runs using 23-year time series daily counts at Falls (river kilometer 42, measuring from River–Columbia confluence) relation discharge temperature data nearby gauge site. also examined stock-specific upstream rates with general linear models monitoring 909 radio-tagged explore effects fish traits on movement through 13 main-stem tributary reaches. Results migrated earlier warm, low-flow years. Mean conditions May were best predictors median run timing dates, which ranged early mid-June. Radio-tagged salmon moved faster when temperatures higher lower. Tagged much (∼25–50 km/d) low-gradient reaches than steeper (mostly <10 km/d). Individual traits, including stock origin, generally not statistically associated rate after accounting for water discharge. Phenology results Yukon, Columbia, Snake basins broadly aligned those basin. Conclusions study offer mechanistic explanation why migrations occur warmer years across broad geographic range. The suggest that some spring-migrating populations may continue trend earlier, behaviorally plastic response uncertain implications. Of particular concern are risks presented by increased freshwater residency like upper Salmon.

Language: Английский

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Climate Change and Marine Food Webs: Navigating Structural Uncertainty Using Qualitative Network Analysis With Insights for Salmon Survival

Global Change Biology, Journal Year: 2025, Volume and Issue: 31(3)

Published: March 1, 2025

ABSTRACT Effectively modeling the impact of climate change on any population requires careful consideration diverse pressures. Potential changes in interactions with other species must be accounted for. As communities reassemble and shifts abundance distribution cascade throughout ecosystems, cumulative impacts conservation concern need to explicitly examined. A structured qualitative analysis alternative responses across food web can play a valuable role design interpretation quantitative models. particular advantage network is ease which wide range scenarios representing structural uncertainties explored. We tested 36 plausible representations connections among salmon key functional groups within marine using The differed how pairs were connected (positive, negative, or no interaction) responded directly change. Our showed that certain configurations produced consistently negative outcomes for salmon, regardless specific values most links. Salmon shifted from 30% 84% when consumption rates by multiple competitor predator increased following press perturbation climate. This scenario aligns some recent observations during heatwave. Feedbacks between mammalian predators particularly important, as indirect effects connecting spring‐ fall‐run salmon. also identified links strongly influenced scenarios. results emphasize importance uncertainty webs demonstrate tool exploring it, paving way more targeted effective research planning.

Language: Английский

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Thiamine Deficiency M74 Developed in Salmon (Salmo salar) Stocks in Two Baltic Sea Areas after the Hatching of Large Year-Classes of Two Clupeid Species—Detected by Fatty Acid Signature Analysis

Fishes, Journal Year: 2024, Volume and Issue: 9(2), P. 58 - 58

Published: Jan. 30, 2024

Lipid-related thiamine (vitamin B1) deficiency of Baltic salmon (Salmo salar), the M74 syndrome, is generally caused by feeding on abundant young sprat (Sprattus sprattus) in Proper, main foraging area these salmon. In 2014, a strong year-class was hatched and herring (Clupea harengus) Gulf Bothnia, where dominant prey. The fatty acid (FA) signatures prey fish muscle or eggs second sea-year spawners suggested that 27% wild River Simojoki 68% reared Dal remained Bothnia 2014 instead continuing to Proper. 2016, 23% females 58% originated from 13% 16%, respectively, Some Neris southern Proper had also been Bothnia. general, low free (THIAM) concentration associated with high lipid content docosahexaenoic (DHA, 22:6n−3) n−3 polyunsaturated FA (n−3 PUFA) concentrations but not eggs. A higher THIAM lower proportions DHA PUFAs Arctic Ocean eggs, despite egg content, indicated their diet contained fewer than diet. Hence, heavily

Language: Английский

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The Effect of Climate Change on Salmonid Fishes in Rivers

Fishes, Journal Year: 2024, Volume and Issue: 9(1), P. 29 - 29

Published: Jan. 8, 2024

Climate warming is a serious threat to many organisms, such as cold-adapted ectotherms [...]

Language: Английский

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Climate‐driven straying dynamics in anadromous salmon and steelhead: Research agenda for conservation

Ecology Of Freshwater Fish, Journal Year: 2024, Volume and Issue: 33(4)

Published: July 15, 2024

Anadromous salmonids of the genera Oncorhynchus, Salmo and Salvelinus (hereafter, 'salmon'), are culturally, economically ecologically important fishes, affected by climate change at every life stage. Predictions about their future distribution abundance typically based on thresholds thermal tolerance changes to phenology in response warming rivers, shifting flow regimes complex marine processes (Crozier & Siegel, 2023). Numerous conservation efforts focus mitigating change, mainly spawning rearing habitats via restoration increase population resilience capacity. While habitat alterations may dominate narrative for salmon a climate-altered future, indirect effects will likely be nuanced combination with other human activities. One such process involves straying natural- ('wild') hatchery-origin through climate-driven olfactory imprinting detection signals, trade-offs between homing selection (Figure 1). The great majority surviving return from ocean natal grounds, guided olfaction sensory inputs. Homing isolates populations, favouring local adaptation (Dittman Quinn, 1996). Straying (spawning non-natal sites) is also natural phenomenon that reflect failure locate home river or rejection site. terms suggest binary alternatives, there nuances. For example, can include fish river, entering but tributary, returning rather than hatchery (Pollock et al., 2020). Whether considered have strayed depends spatial scale observation, lower stray rates observed larger geographic areas (e.g., basin) higher smaller study tributaries); this discrepancy more pronounced scales (Pearsons O'Connor, 2024). Stray especially problematic fisheries managers attempting limit genetic ecological impacts wild (Keefer Caudill, 2014). rivers necessitates upon stream-specific chemical signals one early stages, retaining memory without reinforcement while they feed distant waters, initiating upstream migration when detect these as maturing adults. sequential hypothesis 2014) posits juvenile learn series waypoints, beginning site migrate towards sea, then use waypoints retrace path To home, adult rely sequence including geomagnetic information transitioning imprinted odours, followed conspecific cues, non-olfactory environmental inputs temperature substrate (Bett Hinch, 2016). further complicated 2017; Bett increasing temperatures experienced during spur enter cool, tributaries (Bond Keefer 2018). They exhibit high fidelity after using refugia non-migratory habitats, depending species If spawn resuming migration, constitutes not mere behavioural thermoregulation Temperatures Columbia River its were positively correlated (Westley 2015), reflecting conflict would presumably affect alike. In many models predict flows late summer fall cases, might recognised perceived unsuitable spawning. Climate-related factors beyond acidification increased oceanic CO2 could inhibit way carries into freshwater Hatcheries subject riverine systems, involve management responses challenges. A review National Fish US Pacific Northwest listed air temperature, altered rainfall hydrological cycles seawater intrusion possible (Hanson Ostrand, 2011). Changes water sources hatcheries different chemistries reliance groundwater vs. surface water) (Harbicht transport facilities cold release sites reduce seaward distance. drought conditions California's Central Valley, millions been annually transported released downstream, drastically <10% much 89% (Sturrock 2019). another hatchery- natural-origin steelhead O. mykiss (Walbaum, 1792) had barged down Snake juveniles 73 times tributary adults (where no programme exists) allowed complete downstream (Tattam Ruzycki, Hatchery-origin Chinook Salmon tshawytscha barge below confluence in-river migrants permitted past before barging 2017). Beyond location, if increases necessitate earlier smolts, generating mismatch photoperiod-linked smolting opportunity Considering environment operations straying—itself an incompletely understood phenomenon—a dedicated research agenda needed. We following topics generate valuable insights advance our understanding improve conservation: summary, we urge researchers consider dynamics anadromous future. interplay factors, nature requires attention agenda. proposed intended serve roadmap advancing informing effective strategies face rapidly climate. All co-authors contributed ideas underlying writing article. thank Drs. David H.G.L. Noakes, Carl B. Schreck, Selina S. Heppell countless students staff decades leadership hard work researching straying. Ms. Ashley Sanders illustrated Figure 1. three anonymous reviewers helpful reviews manuscript. Funding manuscript preparation was provided Oregon Hatchery Research Center. There conflicts interest disclose. No material reproduced sources. This article does reference original data.

Language: Английский

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