Reply on RC2 DOI Creative Commons
Lillian McGill

Published: May 12, 2023

Abstract. Climate change is modifying river temperature regimes across the world. To apply management interventions in an effective and efficient fashion, it critical to both understand underlying processes causing stream warming identify streams most least sensitive environmental change. Empirical thermal sensitivity, defined as water with a single degree air temperature, useful tool characterize historical conditions predict how might respond future climate warming. We measured Snoqualmie Wenatchee basins, Washington during years 2014–2021. used ordinary squares regression calculate seasonal summary metrics of sensitivity time-varying coefficient models derive continuous estimates for each site. then applied classification approaches determine unique and, further, establish link between covariates regime. found diversity responses our basins that differed timing magnitude sensitivity. also describing geology snowmelt were important differentiating clusters. Our findings can be inform strategies basin restoration conservation context change, such identifying insensitive areas should preserved protected.

Language: Английский

Closing the gap between science and management of cold‐water refuges in rivers and streams DOI Creative Commons
Francine Mejia, Valérie Ouellet, Martin A. Briggs

et al.

Global Change Biology, Journal Year: 2023, Volume and Issue: 29(19), P. 5482 - 5508

Published: July 19, 2023

Abstract Human activities and climate change threaten coldwater organisms in freshwater ecosystems by causing rivers streams to warm, increasing the intensity frequency of warm temperature events, reducing thermal heterogeneity. Cold‐water refuges are discrete patches relatively cool water that used for relief short‐term survival. Globally, cohesive management approaches needed consider interlinked physical, biological, social factors cold‐water refuges. We review current understanding refuges, identify gaps between science management, evaluate policies aimed at protecting thermally sensitive species. Existing include designating habitats, restricting fishing during periods, implementing threshold standards or guidelines. However, these rare uncoordinated across spatial scales often do not input from Indigenous peoples. propose be managed as distinct operational landscape units, which provide a ecological context is relevant watershed scale. These units foundation an integrated framework links (1) mapping characterizing prioritize conservation actions, (2) leveraging existing new policies, (3) improving coordination jurisdictions, (4) adaptive practices scales. Our findings show while there many opportunities scientific advancement, state sciences sufficient inform policy management. proposed provides path forward managing using protect face global change.

Language: Английский

Citations

29
Groundwater-Surface water interactions research: Past trends and future directions DOI Creative Commons
Dylan J. Irvine, Kamini Singha, Barret L. Kurylyk

et al.

Journal of Hydrology, Journal Year: 2024, Volume and Issue: unknown, P. 132061 - 132061

Published: Sept. 1, 2024

Language: Английский

Citations

11
James Buttle Review: The Characteristics of Baseflow Resilience Across Diverse Ecohydrological Terrains DOI Creative Commons
Martin A. Briggs, Connor P. Newman, Joshua R. Benton

et al.

Hydrological Processes, Journal Year: 2025, Volume and Issue: 39(3)

Published: March 1, 2025

ABSTRACT The dynamic storage of aquifers is the portion groundwater that can potentially drain to any given point along a stream create baseflow. Baseflow typically occurs year‐round in perennial streams, though characteristics and stability are often most important instream processes during extended dry periods (without precipitation snowmelt) when runoff quickflows minimised. term ‘baseflow resilience’ defined for this review as tendency baseflow streams maintain consistent volume water quality year while under stress from climate variability extremes, with anthropogenic stressors such withdrawals, land use change, degradation. ‘Baseflow has, part, user‐defined meaning spanning supply variables primary interest. Watershed directly impact resilience produce non‐intuitive feedbacks enhance some attributes simultaneously impairing others. For example, permeable corridor geology creates strong stream‐groundwater hydrologic connectivity, yet fast drainage via preferential high‐permeability flowpaths lead streamflow not being sustained periods. Also, shallow sources generally more immediately vulnerable extreme events, warming, salinization, transpiration, drought, compared deeper groundwater. Yet drought influenced by lag years, contaminant legacies may propagate through deep receiving waters decades centuries. Finally, irrigation withdrawals intercept would have drained application leach contaminants soil zone unnaturally raising tables, return flows sustain groundwater‐dependent habitats semiarid areas. This covers concept context summarises common hydrogeological controls on, multiscale of, storage. Further, we present several quantitative metrics assess range using both broadly available boutique data types, subset which demonstrated Delaware River Basin, USA.

Language: Английский

Citations

1
Empirical stream thermal sensitivity cluster on the landscape according to geology and climate DOI Creative Commons
Lillian McGill, E. Ashley Steel, Aimee H. Fullerton

et al.

Hydrology and earth system sciences, Journal Year: 2024, Volume and Issue: 28(6), P. 1351 - 1371

Published: March 25, 2024

Abstract. Climate change is modifying river temperature regimes across the world. To apply management interventions in an effective and efficient fashion, it critical to both understand underlying processes causing stream warming identify streams most least sensitive environmental change. Empirical thermal sensitivity, defined as water with a single degree air temperature, useful tool characterize historical conditions predict how might respond future climate warming. We measured Snoqualmie Wenatchee basins, Washington, during hydrologic years 2015–2021. used ordinary squares regression calculate seasonal summary metrics of sensitivity time-varying coefficient models derive continuous estimates for each site. then applied classification approaches determine unique and, further, establish link between covariates regimes. found diversity responses our basins that differed timing magnitude sensitivity. also describing geology snowmelt were important differentiating clusters. Our findings approach can be inform strategies basin restoration conservation context change, such identifying climate-insensitive areas should preserved protected.

Language: Английский

Citations

4
Taking heat (downstream): Simulating groundwater and thermal equilibrium controls on annual paired air–water temperature signal transport in headwater streams DOI
Zachary C. Johnson,

Martin A. Briggs,

Craig D. Snyder

et al.

Journal of Hydrology, Journal Year: 2024, Volume and Issue: 638, P. 131391 - 131391

Published: May 23, 2024

Language: Английский

Citations

4
How quickly do brook trout lose long-term thermal acclimation? DOI
Michael J. O’Donnell, Amy M. Regish, Stephen D. McCormick

et al.

Journal of Thermal Biology, Journal Year: 2025, Volume and Issue: unknown, P. 104103 - 104103

Published: March 1, 2025

Language: Английский

Citations

0
Utility of an Instantaneous Salt Dilution Method for Measuring Streamflow in Headwater Streams DOI
Karli M. Rogers,

Jennifer B. Fair,

Nathaniel P. Hitt

et al.

Ground Water, Journal Year: 2024, Volume and Issue: unknown

Published: Aug. 13, 2024

Abstract Streamflow records are biased toward large streams and rivers, yet small headwater often the focus of ecological research in response to climate change. Conventional flow measurement instruments such as acoustic Doppler velocimeters (ADVs) do not perform well during low‐flow conditions streams, truncating development rating curves critical baseflow dominated by groundwater inflow. We revisited an instantaneous solute tracer injection method alternative ADVs based on paired measurements compare their precision, efficiency, feasibility within across a range conditions. show that precision discharge using salt dilution slug ADV methods were comparable overall, but was more precise lowest flows required less time implement. Often, at or below depth threshold where could even be attempted transects complicated coarse bed material cobbles. discuss methodological benefits limitations conclude facilitate proliferation streamflow observation stream networks highly undersampled compared larger streams.

Language: Английский

Citations

3
Stabilising effects of karstic groundwater on stream fish communities DOI Creative Commons
Nathaniel P. Hitt, Karli M. Rogers, Karmann G. Kessler

et al.

Ecology Of Freshwater Fish, Journal Year: 2023, Volume and Issue: 32(3), P. 538 - 551

Published: Feb. 7, 2023

Abstract Although groundwater exchange processes are known to modulate atmospheric influences on stream temperature and flow, the implications for ecological stability poorly understood. Here, we evaluated temporal change in fish communities across a gradient of influence defined by karst terrain (carbonate parent materials) within Potomac River basin eastern North America. We surveyed 12 sites 2022 that had been sampled 29–30 years previously with similar methods. also collected data from each site used regression slope air‐water relationship index thermal sensitivity processes. Sites exhibited strong controls temperature, were more stable over time these locations than elsewhere. However, was stronger predictor species persistence spatial distribution contributing areas, highlighting importance local variation discharge The presence calcium precipitates (marl) substrates associated low time, suggest such visible features may be useful indicator climate refugia ecosystems.

Language: Английский

Citations

8
Effects of episodic stream dewatering on brook trout spatial population structure DOI
Nathaniel P. Hitt, Karli M. Rogers, Karmann G. Kessler

et al.

Freshwater Biology, Journal Year: 2024, Volume and Issue: 69(7), P. 1027 - 1041

Published: May 20, 2024

Abstract Stream dewatering is expected to become more prevalent due climate change, and we explored the potential consequences for brook trout ( Salvelinus fontinalis) within a temperate forest ecosystem in eastern North America. We estimated fish density stream pools n = 386) from electrofishing surveys over 10 years (2012–2021) compare that exhibits episodic (Paine Run) against of similar size remains flow‐connected (Staunton River) Shenandoah National Park, Virginia (U.S.A.). Annual encompassed fluvial distances ranging 2.6 4.4 km each stream. Mean annual (fish/pool m 2 ) was not different between streams juvenile or adult age classes, but spatial variation greater Paine Run both classes fish. also included proportion unoccupied than Staunton River exhibited stronger autocorrelation among nearby pools, suggesting dispersal limitation surface flow fragmentation. Fish increased during with low summer precipitation, this effect observed River, further indicating importance movement into response low‐flow thresholds. Our results indicate as ecological refuges conditions may affect extirpation risks by sequestering fewer areas. findings highlight hydrological networks because downstream river gages could predict heterogeneity pool occupancy.

Language: Английский

Citations

2
Exploring landscape and geologic controls on spatial patterning of streambank groundwater discharge in a mixed land use watershed DOI Creative Commons
Kevin Jackson, Eric Moore, Ashley M. Helton

et al.

Hydrological Processes, Journal Year: 2024, Volume and Issue: 38(3)

Published: March 1, 2024

Abstract Preferential groundwater discharge features along stream corridors are ecologically important at local and network scales, yet we lack quantification of the multiscale controls on spatial patterning discharge. Here identify physical attributes that best explain variation in presence lateral extent preferential discharges two 5th order streams, Housatonic Farmington Rivers, 32 1st to 4th reaches across River network. We mapped locations exposed streambanks using handheld thermal infrared cameras paired with high‐resolution topographic land use cover datasets, surficial soil characteristic maps, depth‐to‐bedrock geophysical measurements. The unconfined River, MA, USA (12 km) had fewer less (41 38 m active discharge/km river) compared partially confined CT, (26 km; 169 129 river). Using a moving window analysis, found both rivers was more likely occur where bank slopes were steeper, floodplain narrower, degree confinement higher. Along saturated hydraulic conductivity higher shallower. Among surveyed (33.2 km total length) within watershed, observed all but reaches, varied from 0 25% banks (mean = 6%), reach steep, high, watershed urbanization low. Our results show that, though surface (e.g., topographic, cover) subsurface characteristics, bedrock depth) factors control prevalence streambank discharge, dominant vary valley settings sizes.

Language: Английский

Citations

2