Rising water temperature in rivers: Ecological impacts and future resilience

Wiley Interdisciplinary Reviews Water, Год журнала: 2024, Номер 11(4)

Опубликована: Март 5, 2024

Abstract Rising water temperatures in rivers due to climate change are already having observable impacts on river ecosystems. Warming has both direct and indirect aquatic life, further aggravates pervasive issues such as eutrophication, pollution, the spread of disease. Animals can survive higher through physiological and/or genetic acclimation, behavioral phenological change, range shifts more suitable locations. As such, those animals that adapted cool‐water regions typically found high altitudes latitudes where there fewer dispersal opportunities most at risk future extinction. However, sub‐lethal animal physiology phenology, body‐size, trophic interactions could have significant population‐level effects elsewhere. Rivers vulnerable warming because historic management left them exposed solar radiation removal riparian shade, hydrologically disconnected longitudinally, laterally, vertically. The resilience riverine ecosystems is also limited by anthropogenic simplification habitats, with implications for resource use resident organisms. Due complex ecosystems, species‐specific response organisms warming, predicting how will challenging. Restoring provide connectivity heterogeneity conditions would a expected co‐occurring pressures, including should be considered priority part global strategies adaptation mitigation. This article categorized under: Science Water > Environmental Change Life Nature Freshwater Ecosystems Stresses Pressures

Язык: Английский

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Closing the gap between science and management of cold‐water refuges in rivers and streams

Global Change Biology, Год журнала: 2023, Номер 29(19), С. 5482 - 5508

Опубликована: Июль 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.

Язык: Английский

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Modelled Water Temperature Patterns and Energy Balance of a Threatened Coastal Lagoon Ecosystem

Hydrological Processes, Год журнала: 2025, Номер 39(2)

Опубликована: Фев. 1, 2025

ABSTRACT Coastal water temperatures control physical, chemical, and biological processes are expected to rise due future changes in freshwater temperature flow rates, heat exchange with the warming atmosphere, thermal interactions a changing ocean. However, sensitivity of transitional, coastal bodies climate change remains poorly understood, partly lack knowledge on present‐day controls these settings. Accordingly, we applied hydrodynamic model (MIKE 3 FM), coupled module simulate hydrodynamics variability Basin Head lagoon, federally protected ecosystem Canadian province Prince Edward Island. Field data from lagoon were used calibrate assess numerical model, while atmospheric, oceanic, hydrologic form boundary conditions. The successfully reproduced tidal level oscillations as well diurnal semi‐diurnal (tidal) fluctuations. Model results show longitudinal, cross‐shore, vertical within including pronounced near bed inlet pumping. field highlight during waves; however, distinct cold‐water plumes at inputs (springs groundwater‐dominated streams) persisted, temporally averaged zones up 18 °C colder than ambient lagoon. Although, inflows can dominate local energy budgets, surface fluxes, especially shortwave radiation, exert dominant lagoon‐wide budget. Collectively, findings emphasise interacting effects hydrologic, oceanic forcing spatiotemporal patterns this threatened ecosystem.

Язык: Английский

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Wildfire-induced shifts in groundwater discharge to streams identified with paired air and stream water temperature analyses

Journal of Hydrology, Год журнала: 2023, Номер 619, С. 129272 - 129272

Опубликована: Фев. 16, 2023

Within the western United States, increasingly severe and frequent wildfires may alter magnitude, timing, quality of water exported from burned areas by streams. Post-fire hydrologic studies often focus on peak stream flow responses to shifts in runoff generation or annual streamflow yield response changes evapotranspiration following fire. However, magnitude duration wildfire effects groundwater recharge, subsurface routing, consequences for low flows sourced predominately baseflow are poorly understood. Here, we demonstrate an approach using amplitude phase paired air temperature signals broadly identify watershed contributions after Watersheds were classified pre-fire data, as having air-coupled (i.e., reduced apparent signature), deep groundwater, shallow signals. Changes pre- post-fire metrics compared locations (n = 17) spanning a large range physiographic climatic conditions across States. Pre- comparisons computed quantile bootstrapped confidence intervals (ci 95), well aggregate Kruskal-Wallis post-hoc Dunn tests. Statistical suggest that overall, watersheds minimal influence most likely experience fire-induced change. More specifically, experienced increases discharge, with more stable thermal regimes less-coupled ambient temperature. These findings form basis conceptual framework resistance change fire can be applied first approximation management, impacts aquatic habitat, post-wildfire planning.

Язык: Английский

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Cold-water habitats, climate refugia, and their utility for conserving salmonid fishes

Canadian Journal of Fisheries and Aquatic Sciences, Год журнала: 2023, Номер 80(7), С. 1187 - 1206

Опубликована: Март 15, 2023

Anthropogenic climate change is warming global temperatures, with significant implications for salmonid fishes that depend on the availability of cold water during one or more life stages. Along southern range extents many species, and elsewhere warm temperatures are increasingly problematic, identification protection restoration habitats may serve as refugia where local populations can persist emerging an important conservation tactic. In this perspective piece, we address concept utility refugia—drawing a distinction commonly considered thermal refuges—describe technological advances enable accurate temperature mapping species distribution modeling in lotic environments, outline key uncertainties opportunities to chart constructive path forward topic will continue grow importance. Identifying not panacea conservation, but argue there tangible benefits doing so, least which options it affords thinking acting strategically within context changing century.

Язык: Английский

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Stuck in the middle: thermal regimes of coastal lagoons and estuaries in a warming world

Environmental Research Letters, Год журнала: 2023, Номер 18(6), С. 061003 - 061003

Опубликована: Май 16, 2023

Abstract N/A

Язык: Английский

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James Buttle Review: The Characteristics of Baseflow Resilience Across Diverse Ecohydrological Terrains

Hydrological Processes, Год журнала: 2025, Номер 39(3)

Опубликована: Март 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.

Язык: Английский

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Bedrock depth influences spatial patterns of summer baseflow, temperature and flow disconnection for mountainous headwater streams

Hydrology and earth system sciences, Год журнала: 2022, Номер 26(15), С. 3989 - 4011

Опубликована: Авг. 4, 2022

Abstract. In mountain headwater streams, the quality and resilience of summer cold-water habitat is generally regulated by stream discharge, longitudinal channel connectivity groundwater exchange. These critical hydrologic processes are thought to be influenced corridor bedrock contact depth (sediment thickness), a parameter often inferred from sparse hillslope borehole information, piezometer refusal remotely sensed data. To investigate how local might control temperature disconnection (dewatering) patterns, we measured collecting interpreting 191 passive seismic datasets along eight streams in Shenandoah National Park (Virginia, USA). addition, used multi-year streamflow records calculate several baseflow-related metrics among study streams. Finally, comprehensive visual surveys dewatering were conducted 2016, 2019 2021 during low flow conditions (124 total km length). We found that depths not well-characterized soils maps or an existing global-scale geologic dataset where latter overpredicted 12.2 m (mean) approximately four times average 2.9 m. Half corridors had less than 2 Of Staunton River deepest (3.4 m), coldest profiles substantially higher baseflow indices compared other steams. also exhibited paired air water annual signals suggesting deeper influence, did dewater lower sections any survey. contrast, Paine Run Piney show pronounced, patchy dewatering, with having dozens discrete dry ranging 1 greater 300 length. Stream patterns apparently combination deep (20+ m) features more subtle sediment thickness variation (1–4 depending on valley hydrogeology. combination, these unique first large-scale empirical support for conceptual models based spatially variable underflow capacity shallow supply.

Язык: Английский

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Mechanistic Simulations Suggest Riparian Restoration Can Partly Counteract Climate Impacts to Juvenile Salmon

JAWRA Journal of the American Water Resources Association, Год журнала: 2022, Номер 58(4), С. 525 - 546

Опубликована: Июнь 7, 2022

Abstract Climate change is reducing summertime water availability and elevating temperature, placing human consumptive needs in competition with of coldwater fishes. We worked natural resource managers the Snoqualmie River (Washington, USA) to develop riparian management scenarios, used a process‐based modeling system examine how threatened population Chinook salmon ( Oncorhynchus tschawytscha ) may respond climate whether restoration could reduce effects. Linking models global climate, regional hydrology, fish, we projected that streams would become warmer year‐round drier during summer, further stressing salmon. accelerated egg emergence, increased juvenile growth survival, outmigration sub‐yearling migrants. Growth was depressed for remaining instream summer (potential yearling migrants). Riparian counteracted ~10% increases affected similarly regardless buffers were partially or fully restored, whereas degradation warmed streams. mitigated effects on potential migrant size, but only minimally migrants (assessment metrics changed <2%). Our results will be useful watershed aligning priorities fish humans our framework can applied elsewhere.

Язык: Английский

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Present and future thermal regimes of intertidal groundwater springs in a threatened coastal ecosystem

Hydrology and earth system sciences, Год журнала: 2022, Номер 26(18), С. 4721 - 4740

Опубликована: Сен. 28, 2022

Abstract. In inland settings, groundwater discharge thermally modulates receiving surface water bodies and provides localized thermal refuges; however, the influence of intertidal springs on coastal waters their sensitivity to climate change are not well studied. We addressed this knowledge gap with a field- model-based study threatened lagoon ecosystem in southeastern Canada. paired analyses drone-based imagery situ hydrologic monitoring estimate from groundwater-dominated streams summer 2020. Results, which were generally supported by independent radon-based estimates, revealed that combined summertime spring inflows (0.047 m3 s−1) comparable stream (0.050 s−1). Net advection values for also each other but 2 orders magnitude less than downwelling shortwave radiation across lagoon. Although lagoon-scale effects small compared atmospheric forcing, dominated heat transfer at local scale, creating pronounced cold-water plumes along shoreline. A numerical model was used interpret measured temperature data investigate seasonal multi-decadal patterns. Modelled temperatures relate respective aquifer source depths, while simulations forced historic projected assess long-term warming. Based 2020–2100 scenarios (for 5-year-averaged air increased up 4.32∘), modelled subsurface 0.08–2.23∘ shallow (4.2 m depth) 0.32–1.42∘ deeper portion (13.9 m), indicating depth dependency This presents first analysis groundwater-dependent ecosystems indicates management should consider potential impacts

Язык: Английский

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