Hydrothermal Impacts of Water Release on Early Life Stages of White Sturgeon in the Nechako River, (B.C. Canada)

Oyinlola, Muhammed A.; Khorsandi, Mostafa; Penman, Rachael; Earhart, Madison L.; Arsenault, R.J.; Brauner, Colin J.; St‐Hilaire, André

doi:10.2139/ssrn.4357635

Cited by 1 publication

(8 citation statements)

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“…CHDD quantifies the amount of heat accumulation based on the average daily temperature exceeding the upper optimal temperature range threshold. This approach is consistent with prior studies (Neuheimer and Taggart 2007;Oyinlola et al 2023;Wuenschel et al 2012) and the threshold calculation is as follows:…”

Section: Current and Future Thermal Exposure Risksupporting

confidence: 74%

“…This includes early summer months such as June when the fry life stages emerge in the Nechako River (Alcan, 2010;Bradford & Taylor, 2023). This Oyinlola et al, 2023). It is especially important to address this issue given that temperatures in BC are expected to rise significantly in the early Fall season relative to historical observations (Whitfield, 2001).…”

Section: Discussionmentioning

confidence: 99%

“…Chinook salmon life stage-specific thermal tolerance thresholds were obtained from laboratory studies conducted at the University of British Columbia, Canada and the Cultus Lake Salmon Research Laboratory on Shuswap Chinook salmon, an upper Fraser River population (Table 2). The optimal Temperature Range (ToptR), Sub-optimal Temperature Range (SToptR), and Critical Thermal Limit Range (CTLR) were recorded for each early life stage (i.e., frynewly emerged; parr larger and older, and adultfreshwater return migrating) using the same approach described in Oyinlola et al (2023). The ToptR was defined as the temperature range in which fish exhibit their optimal, or highest physiological performance.…”

Section: Cequeau Model: Modelling Nechako River Water Temperaturementioning

confidence: 99%

“…SToptR is the temperature range coinciding with a loss of some critical function and less than 25% mortality, and CTLR is the temperature range where more than 50% mortality occurred (M. A. Oyinlola et al, 2023). The ToptR was also obtained from peer-reviewed literature and government documents when information was missing.…”

Section: Cequeau Model: Modelling Nechako River Water Temperaturementioning

confidence: 99%

“…1B). Following the framework previously outlined by Oyinlola et al (2023), we focused on the river system sections where the species are present. First, we employed a semi-distributed hydrological and water temperature model known as CEntre QUébécois des Sciences de l'EAU (CEQUEAU) to simulate the Nechako River's historical daily water temperature between 1980 and 2019.…”

Section: Introductionmentioning

confidence: 99%

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Thermal exposure risk in different life stages of Chinook salmon in the Nechako River system, British Columbia

Oyinlola,

Khorsandi,

Mayer

et al. 2024

Preprint

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Climate change is affecting freshwater systems, leading to increased water temperatures, which is posing a threat to freshwater ecological communities. In the Nechako River, a water management program has been in place since the 1980s to maintain water temperatures at 20°C during the migration of Sockeye salmon. However, the program's effectiveness in mitigating the impacts of climate change on resident species like Chinook salmon's thermal exposure is uncertain. In this study, we utilised the CEQUEAU hydrological model and life stage-specific physiological data to evaluate the consequences of the current program on Chinook salmon's thermal exposure under two contrasting climate change and socio-economic scenarios (SSP2-4.5 and SSP5-8.5). The results indicate that the thermal exposure risk is projected to be above the optimal threshold for parr and adult life stages under both scenarios relative to the 1980s. These life stages could face an increase in thermal exposure ranging from up to 2 and 5 times by 2090s relative to the 1980s during the months they occurred under the SSP5-8.5 scenario, including when the program is active (July 20th to August 20th). Additionally, our study shows that climate change will result in a substantial rise in cumulative heat degree days, ranging from 1.9 to 5.8 times (2050s) and 2.9 to 12.9 times (2090s) in comparison to the 1980s under SSP5-8.5. Our study highlights the need for a holistic approach to review the current Nechako management plan and consider all species in the Nechako River system in the face of climate change.

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Section: Current and Future Thermal Exposure Risksupporting

confidence: 74%

Section: Discussionmentioning

confidence: 99%

Section: Cequeau Model: Modelling Nechako River Water Temperaturementioning

confidence: 99%

Section: Cequeau Model: Modelling Nechako River Water Temperaturementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Thermal exposure risk in different life stages of Chinook salmon in the Nechako River system, British Columbia

Oyinlola,

Khorsandi,

Mayer

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

Hydrothermal Impacts of Water Release on Early Life Stages of White Sturgeon in the Nechako River, (B.C. Canada)

Cited by 1 publication

References 81 publications

Thermal exposure risk in different life stages of Chinook salmon in the Nechako River system, British Columbia

Thermal exposure risk in different life stages of Chinook salmon in the Nechako River system, British Columbia

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