scholarly journals Waning habitats due to climate change: the effects of changes in streamflow and temperature at the rear edge of the distribution of a cold-water fish

2017 ◽  
Vol 21 (8) ◽  
pp. 4073-4101 ◽  
Author(s):  
José María Santiago ◽  
Rafael Muñoz-Mas ◽  
Joaquín Solana-Gutiérrez ◽  
Diego García de Jalón ◽  
Carlos Alonso ◽  
...  
Keyword(s):  
Climate Change ◽  
Brown Trout ◽  
Cold Water ◽  
Local Level ◽  
Stream Temperature ◽  
Risk Level ◽  
Model Parameters ◽  
Linear Regression Method ◽  
Rear Edge ◽  
Water Fish

Abstract. Climate changes affect aquatic ecosystems by altering temperatures and precipitation patterns, and the rear edges of the distributions of cold-water species are especially sensitive to these effects. The main goal of this study was to predict in detail how changes in air temperature and precipitation will affect streamflow, the thermal habitat of a cold-water fish (the brown trout, Salmo trutta), and the synergistic relationships among these variables at the rear edge of the natural distribution of brown trout. Thirty-one sites in 14 mountain rivers and streams were studied in central Spain. Models of streamflow were built for several of these sites using M5 model trees, and a non-linear regression method was used to estimate stream temperatures. Nine global climate models simulations for Representative Concentration Pathways RCP4.5 and RCP8.5 scenarios were downscaled to the local level. Significant reductions in streamflow were predicted to occur in all of the basins (max. −49 %) by the year 2099, and seasonal differences were noted between the basins. The stream temperature models showed relationships between the model parameters, geology and hydrologic responses. Temperature was sensitive to streamflow in one set of streams, and summer reductions in streamflow contributed to additional stream temperature increases (max. 3.6 °C), although the sites that are most dependent on deep aquifers will likely resist warming to a greater degree. The predicted increases in water temperatures were as high as 4.0 °C. Temperature and streamflow changes will cause a shift in the rear edge of the distribution of this species. However, geology will affect the extent of this shift. Approaches like the one used herein have proven to be useful in planning the prevention and mitigation of the negative effects of climate change by differentiating areas based on the risk level and viability of fish populations.

scholarly journals Waning habitats due to climate change: effects of streamflow and temperature changes at the rear edge of the distribution of a cold-water fish

2017 ◽  
Author(s):  
José M. Santiago ◽  
Rafael Muñoz-Mas ◽  
Joaquín Solana ◽  
Diego García de Jalón ◽  
Carlos Alonso ◽  
...  
Keyword(s):  
Climate Change ◽  
Cold Water ◽  
Local Level ◽  
Stream Temperature ◽  
Global Climate Models ◽  
Risk Level ◽  
Linear Regression Method ◽  
Rear Edge ◽  
Temperature And Precipitation ◽  
Water Fish

Abstract. Climate change affects aquatic ecosystems altering temperature and precipitation patterns, and the rear edge of the distribution of cold-water species is especially sensitive to them. The main goal was to predict in detail how change in air temperature and precipitation will affect streamflow, the thermal habitat of a cold-water fish (brown trout, Salmo trutta Linnaeus 1758), and their synergistic relationships at the rear edge of its natural distribution. 31 sites in 14 mountain rivers and streams were studied in Central Spain. Models at several sites were built using regression trees for streamflow, and a non-linear regression method for stream temperature. Nine global climate models simulations for the RCP4.5 and RCP8.5 (Representative Concentration Pathways) scenarios were downscaled to a local level. Significant streamflow reductions were predicted in all basins (max. −49 %) by the year 2099, showing seasonal differences between them. The stream temperature models showed relationships between models parameters, geology and hydrologic responses. Temperature was sensitive to the streamflow in one set of streams, and summer reductions contributed to additional stream temperature increases (max. 3.6 °C), although the most deep-aquifer dependent sites better resisted warming. The predicted increase in water temperature reached up to 4.0 °C. Temperature and streamflow changes will cause a shift of the rear edge of the species distribution. However, geology conditioned the extent of this shift. Approaches like these should be useful in planning the prevention and mitigation of negative effects of climate change by differentiating areas based on the risk level and viability of fish populations.

scholarly journals Brown trout thermal niche and climate change: expected changes in the distribution of cold‐water fish in central Spain

Ecohydrology ◽  
2015 ◽  
Vol 9 (3) ◽  
pp. 514-528 ◽  
Author(s):  
José M. Santiago ◽  
Diego García de Jalón ◽  
Carlos Alonso ◽  
Joaquín Solana ◽  
Jaime Ribalaygua ◽  
...  
Keyword(s):  
Climate Change ◽  
Brown Trout ◽  
Cold Water ◽  
Central Spain ◽  
Thermal Niche ◽  
Water Fish

Effects of Climate Change on Cold-Water Fish in the Northern Rockies

2017 ◽  
pp. 37-58 ◽  
Author(s):  
Michael K. Young ◽  
Daniel J. Isaak ◽  
Scott Spaulding ◽  
Cameron A. Thomas ◽  
Scott A. Barndt ◽  
...  
Keyword(s):  
Climate Change ◽  
Cold Water ◽  
Water Fish ◽  
Northern Rockies

scholarly journals Potential for Managed Aquifer Recharge to Enhance Fish Habitat in a Regulated River

Water ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 673 ◽  
Author(s):  
Robert W. Van Kirk ◽  
Bryce A. Contor ◽  
Christina N. Morrisett ◽  
Sarah E. Null ◽  
Ashly S. Loibman
Keyword(s):  
Water Temperature ◽  
Brown Trout ◽  
Cold Water ◽  
Stream Temperature ◽  
Managed Aquifer Recharge ◽  
Regulated River ◽  
Snake River ◽  
Irrigated Agriculture ◽  
Aquifer Recharge ◽  
Fisheries Conservation

Managed aquifer recharge (MAR) is typically used to enhance the agricultural water supply but may also be promising to maintain summer streamflows and temperatures for cold-water fish. An existing aquifer model, water temperature data, and analysis of water administration were used to assess potential benefits of MAR to cold-water fisheries in Idaho’s Snake River. This highly-regulated river supports irrigated agriculture worth US $10 billion and recreational trout fisheries worth $100 million. The assessment focused on the Henry’s Fork Snake River, which receives groundwater from recharge incidental to irrigation and from MAR operations 8 km from the river, addressing (1) the quantity and timing of MAR-produced streamflow response, (2) the mechanism through which MAR increases streamflow, (3) whether groundwater inputs decrease the local stream temperature, and (4) the legal and administrative hurdles to using MAR for cold-water fisheries conservation in Idaho. The model estimated a long-term 4%–7% increase in summertime streamflow from annual MAR similar to that conducted in 2019. Water temperature observations confirmed that recharge increased streamflow via aquifer discharge rather than reduction in river losses to the aquifer. In addition, groundwater seeps created summer thermal refugia. Measured summer stream temperature at seeps was within the optimal temperature range for brown trout, averaging 14.4 °C, whereas ambient stream temperature exceeded 19 °C, the stress threshold for brown trout. Implementing MAR for fisheries conservation is challenged by administrative water rules and regulations. Well-developed and trusted water rights and water-transaction systems in Idaho and other western states enable MAR. However, in Idaho, conservation groups are unable to engage directly in water transactions, hampering MAR for fisheries protection.

Effects of climate change on the life stages of stream‐dwelling brown trout ( Salmo trutta Linnaeus, 1758) at the rear edge of their native distribution range

Ecohydrology ◽  
2020 ◽  
Vol 13 (7) ◽  
Author(s):  
José M. Santiago ◽  
Carlos Alonso ◽  
Diego García de Jalón ◽  
Joaquín Solana‐Gutiérrez ◽  
Rafael Muñoz‐Mas
Keyword(s):  
Climate Change ◽  
Brown Trout ◽  
Salmo Trutta ◽  
Distribution Range ◽  
Life Stages ◽  
Rear Edge ◽  
Brown Trout Salmo Trutta

scholarly journals The interaction of exposure and warming tolerance determines fish species vulnerability to warming stream temperatures

2018 ◽  
Vol 14 (9) ◽  
pp. 20180342 ◽  
Author(s):  
Annika W. Walters ◽  
Caitlin P. Mandeville ◽  
Frank J. Rahel
Keyword(s):  
Climate Change ◽  
Rainbow Trout ◽  
Brown Trout ◽  
Fish Species ◽  
Fish Assemblage ◽  
Thermal Tolerance ◽  
Stream Temperature ◽  
Vulnerable Species ◽  
Species Vulnerability ◽  
Vulnerability To Climate Change

Species vulnerability to climate change involves an interaction between the magnitude of change (exposure) and a species's tolerance to change. We evaluated fish species vulnerability to predicted stream temperature increases by examining warming tolerances across the Wyoming fish assemblage. Warming tolerance combines stream temperature with a thermal tolerance metric to estimate how much warming beyond current conditions a species can withstand. Brown trout, rainbow trout and burbot had the lowest warming tolerances and the highest proportion of currently occupied sites that will become unsuitable under predicted temperature increases. These most vulnerable species were coldwater species, but had neither the lowest thermal tolerances nor would they experience the greatest temperature increases. Our results highlight the importance of considering the interaction of exposure and warming tolerance when predicting climate change vulnerability and demonstrate an approach that can be applied broadly.

Effects of land use on summer thermal regimes in critical salmonid habitats of the Pacific Northwest

2019 ◽  
Vol 76 (5) ◽  
pp. 753-761 ◽  
Author(s):  
Ryan P. Kovach ◽  
Clint C. Muhlfeld ◽  
Robert Al-Chokhachy ◽  
Jeffrey V. Ojala ◽  
Eric K. Archer
Keyword(s):  
Climate Change ◽  
Pacific Northwest ◽  
Land Management ◽  
Management Practices ◽  
Cold Water ◽  
Stream Temperature ◽  
Livestock Grazing ◽  
Temperature Regimes ◽  
Thermal Regimes ◽  
Conservation Concern

The effect of climate change on stream temperature regimes is of significant concern to natural resource managers focused on protecting cold-water-dependent species. Nevertheless, understanding of how human land-use activities may act to exacerbate the effects of climate change on stream temperature regimes is limited. Using extensive stream temperature data with high-resolution climate and habitat data, we quantified how land management activities are related to summer stream temperatures across the Pacific Northwest, USA. We then described the distribution of land management practices influencing summer thermal regimes relative to the distribution of salmonid fish species of conservation concern. After accounting for climatic and geophysical variation, we detected a strong relationship between livestock grazing and summer thermal regimes. Maximum, average, and diel variation in water temperature was greater where livestock grazing was present. Livestock grazing was widespread, occurring in 43%–100% of sites supporting salmonid species of conservation concern. Thus, current land management practices may be intensifying the effects of ongoing climate change in freshwater habitats, acting to further threaten cold-water fishes of conservation concern.

Local Policy for a Protected Environmental Area Management: The Case of Limiting Motorized Vehicles in Park of Canigou in Pyrenées Orientales

2018 ◽  
Vol 1 (1) ◽  
Keyword(s):  
Climate Change ◽  
Human Activities ◽  
Energy Use ◽  
Local Level ◽  
Air Traffic ◽  
Small Scale ◽  
Individual Action ◽  
Local Policy ◽  
Motorized Vehicles ◽  
Local Levels

“We regard the recent science –based consensual reports that climate change is, to a large extend, caused by human activities that emit green houses as tenable, Such activities range from air traffic, with a global reach over industrial belts and urban conglomerations to local small, scale energy use for heating homes and mowing lawns. This means that effective climate strategies inevitably also require action all the way from global to local levels. Since the majority of those activities originate at the local level and involve individual action, however, climate strategies must literally begin at home to hit home.”

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