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Despite the important effects of inland fisheries on food, economy, and ecosystem services throughout the world, no comprehensive understanding on the status or key drivers of inland fisheries exists (Beard et al. 2011). Our lack of knowledge regarding the status results from the common belief that inland fishery harvests are widely under reported (FAO 2009; Welcomme et al. 2010), particularly the contributions from recreational, artisanal, and illegal fisheries (FAO 2003; Allan et al. 2005). Overcoming this knowledge gap has no simple solution, given that resources to conduct on-the-ground fisheries assessments are lacking throughout much of the world, particularly in Africa or Asia where the majority of the inland...
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The overall goal of the Midwestern regional-scale assessment was to identify river reaches in the Glacial Lakes Partnership regions (focusing on Michigan, Minnesota, and Wisconsin) that are most vulnerable to potential impacts of projected climate and land use changes. Because fish assemblages are strongly influenced by river water temperature and flow regimes, which are in turn affected by climate and land-use conditions, we will attempt to model fish habitat response to climate and land use changes through changes in temperature and flow. This project intended to: (1) develop three models that predict daily summer temperature for all river reaches in each state; (2) develop a single model to predict non-winter...
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Trout are one of the most culturally, economically, and ecologically important groups of freshwater fishes in the Rocky Mountain region. However, human impacts and climate change are significantly altering freshwater ecosystems that support native trout species. Despite their broad importance, many of the region’s trout populations are threatened and some require immediate conservation efforts to reverse their decline. Although work is being done to understand and mitigate these changes, the ability to accurately assess vulnerability is currently limited due to a lack of data-driven approaches that incorporate uncertainty and adaptive capacity at scales relevant to effective management. USGS researchers will...
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Species are on the move as they respond to climate change. This includes many native species, but also species with high costs to society such as disease vectors, pests, and nonnative invasive species (an invasive species is a species that is not native to a specific location but is spreading with the tendency of causing damage to native plants and animals). Currently there are hundreds of invasive species with relatively restricted ranges in the southeastern U.S., but as the climate changes these species are expected to expand their ranges to new regions. It is important to understand if and how these species might move and what actions we can take to lessen their impact on species and habitats. To achieve this...
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Freshwater is a critical driver for island ecosystems. Climate change has fundamentally altered the water cycle in tropical islands. The changes in dynamic patterns of streamflow could result in the temporal and spatial difference in the riverine, estuarine, and coastal habitats that support native species. In particular, these habitats support the nine native aquatic species in Hawaiʻi at different stages of their migratory life cycle. To examine how changes in streamflow regimes have impacted habitat quality for these native aquatic species, an ongoing project has examined statewide long-term stream records. Researchers are in the process of building hydrological models and connecting the stream dynamics with...
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Project Overview Climate change and human activities are threatening many sensitive aquatic species in prairie streams across the Great Plains region. Researchers supported by this North Central CASC project will combine and analyze data collected independently by Great Plains states to identify thresholds of environmental change that may lead to species loss and changes in aquatic communities. This information can guide managers in deciding whether to resist, accept, or direct change in these ecosystems to protect organisms and ecosystem services. Project Summary Prairie streams provide economic, recreational, and municipal services for human society and critical habitat for aquatic organisms including fish, crayfish,...
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The impacts of climate change are widespread and accelerating. As natural resource managers are tasked with maintaining and protecting species and ecosystems, options for minimizing the impacts of climate change are needed. One option for climate adaptation focuses on resistance, which seeks to preserve, as much as possible, the historical structure, composition, and function of an ecosystem in the face of changing climate conditions. One of the primary resistance strategies is to identify and conserve what are known as climate change refugia. These refugia represent areas that remain relatively buffered from contemporary climate change over time and therefore enable the persistence of valued physical, ecological,...
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The Food and Agriculture Organization of the United Nations (FAO) documents the status and trends of marine fish stocks that represent approximately 80% of global marine catch. These stocks are routinely monitored, and the FAO assessment describes the extent of exploitation against different reference points - such as underfished, sustainable fished, or overfished. Although inland fisheries, which represent 12% of total global capture fishery production, provide important economic and social services, including accessible and affordable high-quality protein to some of the world’s most vulnerable populations, FAO has no comparable system for assessing the state of inland fisheries. This is a critical knowledge gap...
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Walleye, a socially and economically important sportfish across much of North America, are experiencing population declines in many lakes throughout their range. Studies suggest that multiple factors – potentially linked to climate change – are contributing to the decline of walleye, including changes in lake temperatures, loss of habitat, increasing water clarity (perhaps due to drought), and interactions with other fish. This research seeks to identify the mechanisms that underlie declining walleye populations, particularly the low survival rate of young walleye. Data will be collected through a whole-lake experiment, an analysis of long-term data from lakes in northern Wisconsin, and simulation modeling. Members...
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Fish that are harvested from rivers and lakes play an important role in ensuring global food security. However, data on river fisheries is not collected in any standardized format globally. Although targeted analyses have been conducted on certain river systems, the approaches used, such as intensive field sampling, are not feasible at a global scale. Most river fish are harvested by small-scale operations and in countries that lack the necessary infrastructure and technology that would enable regular reporting of harvests. Therefore, alternative approaches are needed for estimating the harvest potential of river fisheries at a global scale. Given changing climate conditions and the potential impact of these changes...
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Native Americans are one of the most vulnerable populations to climate change in the United States because of their reliance upon the natural environment for food, livelihood, and cultural traditions. In the Southwest, where the temperature and precipitation changes from climate change are expected to be particularly severe, tribal communities may be especially vulnerable. Through this project, researchers sought to better understand the climate change threats facing the Pyramid Lake Paiute Tribe of northwestern Nevada. Researchers found that the Tribe’s vulnerability to climate change stems from its dependence on Pyramid Lake, which may experience reduced water supply in the future. This will potentially have negative...
Categories: Project; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: 2012, CASC, Completed, Federal, Fish, All tags...
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In the Gulf of Alaska, streams will experience more dramatic low water events, interspersed with larger and potentially more frequent high flow events in the coming decades. Reduced stream flows are likely to occur due to diminished snowpack and seasonal droughts, while higher flow events are likely to occur with more frequent storms and rain-on-snow events. These changes are likely to influence the growth trajectories of juvenile salmon, such as coho salmon and chinook salmon, that live up to two years in freshwater before migrating to the ocean. Stream flows can influence juvenile salmon growth by modifying food availability, water clarity, temperature, and predation risk. This high-resolution study examines...
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Inland fisheries have tremendous cultural, economic, and subsistence value. However, climate change brings new stresses to land-locked fisheries that raise novel challenges for resource managers. One fundamental challenge in inland fisheries is how to best assess and manage data-limited fisheries when resources are finite and uncertainty is pervasive. To address this challenge, we will use quantitative models to examine whether indicators of fish population status commonly-measured by managers can serve as a “short-cut” to more data- and capacity-intensive approaches. Further, we will work and communicate directly with state and Tribal fisheries managers to better understand the challenges they face when making...
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Stream fish are in peril from a changing climate, particularly for species with restricted distributions or populations on the southern edge of their range. For these fish, the opportunity to escape warming temperatures is limited by the network of stream channels accessible to them. To deal with temperatures beyond their physical capacity, fishes must move, adapt, or die. However, little is known for many of these species about their preferred temperatures, critical temperature limits, or capacity to adapt to or tolerate increasing temperatures. Researchers will measure the preferred temperatures and tolerance of two stream fish that are vulnerable to climate change: the Ozark Shiner and the Blacknose Shiner. The...
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Yellow perch and alewife are ecologically, economically, and culturally important fish species in Lake Michigan whose populations support recreational and commercial fisheries. However, both of these species’ populations have been in decline for over 20 years. This project seeks to understand the factors affecting variability in offspring survival of yellow perch and alewife in Lake Michigan in order to project survival under scenarios of future climate change. Like other fish species, yellow perch and alewives produce huge numbers of small offspring, but most die early in life. Small changes in survival at this early stage can have a strong impact on the number of fish that ultimately contribute to fisheries....
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Great Lakes fishery managers and stakeholders have little information regarding how climate change could affect the management and conservation of fish populations, including those of high recreational and commercial value. Scientists from the US Geological Survey (USGS) worked closely with state management agencies and the National Wildlife Federation to complete several objectives that provide knowledge to aid their planning and management strategies in anticipation of coming changes. First, researchers updated a regional Great Lakes climate model to predict water level changes, water temperatures, and ice cover data for the entire Great Lakes basin 50-100 years into the future. Second, researchers used satellite...
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Previous climate change research for the Colorado River Basin has used down-scaled climate models to predict impacts to hydropower and the potential ability to meet mandated water releases. The Lower Colorado River Basin (LCRB) has one of the most imperiled fish faunas in the nation with about half of the native fish species listed as Threatened or Endangered under the Federal Endangered Species Act. Current water demands for agriculture and human consumption are only slightly less than long-term annual flows. Future projections based on climate change alone indicate decreased precipitation, increased temperatures, and lower annual runoff which will further stress this ecosystem that is experiencing among the highest...
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The Colorado River and its major tributaries provide a crucial water supply for more than 40 million people in the American Southwest and in California. This water supply is primarily used in irrigated agriculture but also provides essential drinking water to many large metropolitan areas. Hydropower is also produced at many of the large dams on the river. River flows have declined during the past 15 years due to decreasing watershed runoff associated with a warming climate and ongoing drought. Climate projections indicate a continued decrease in future water availability as runoff continues to decline and temperatures warm. Water-users in the Colorado River basin are concerned about this declining water availability...
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Climate change adaptation research has made major advances over the last decade. For example, much is known about the impacts of climate change, many novel adaptation planning approaches have been developed, decision tools have become ubiquitous, and many novel adaptation options have been proposed. However, additional research is needed to demonstrate how these adaptation planning schemes can translate to implementation on the ground. The area in and around the Yosemite and Sequoia National Parks in Southern Sierra Nevada serve as ideal natural laboratories to study the impacts of climate change and the effectiveness of various on-the-ground forest treatments and restoration designs. Southern Sierra Nevada faces...
map background search result map search result map Forecasting Climate Change Induced Effects on Recreational and Commercial Fish Populations in the Great Lakes Climate Change Vulnerability of the Pyramid Lake Paiute Tribe in the Southwest Projected Climate and Land Use Change Impacts on Aquatic Habitats in the Midwestern United States (Regional Assessment) Projected Climate and Land Use Change Impacts on Aquatic Habitats of the Lower Colorado River Basin (Regional Assessment) Developing New Strategies for Modeling and Assessing the Response of Global Inland Fisheries to Regional Changing Climate Safe Operating Space for Walleye: Understanding the Conditions Needed to Sustain Recreational Fisheries in a Changing World Estimating Global River Fisheries Harvest Potential Assessing the State of Global Inland Fisheries Developing A National Framework for Incorporating Climate Change Refugia into Conservation and Adaptation Planning The Impacts of Climate Change and Water Supply Management on Fish in the Colorado River Assessing the Vulnerability of Native Trout in the Northern Rockies: Linking Science and Management for Climate Adaptation An Assessment of Invasive Species Range Shifts in the Southeastern U.S. and Actions to Manage Them Understanding and Forecasting Potential Recruitment of Lake Michigan Fishes Linking Stream Fish Thermal Ecology and Adaptive Capacity to Inform Watershed-Based Management and Species Status Assessments Designing Climate-Resilient Habitat for At-Risk Species in the Southern Sierra Nevada Forest The Influence of Stream Flow Patterns on Juvenile Salmon Growth in Southeast Alaska Impacts of Extreme Events on the Native and Nonnative Aquatic Species of Hawaiʻi Stream Ecosystem Gulf Watch Alaska - Pelagic Ecosystems Forage Fish Component - Data from Prince William Sound: Distribution, Abundance, and Morphology of Fish, Zooplankton, and Predators and Oceanographic Conditions Climate Adaptation for Data-Limited Inland Fisheries Identifying the Environmental Limits of Aquatic Species in Prairie Streams to Build Climate Resilience Climate Change Vulnerability of the Pyramid Lake Paiute Tribe in the Southwest Gulf Watch Alaska - Pelagic Ecosystems Forage Fish Component - Data from Prince William Sound: Distribution, Abundance, and Morphology of Fish, Zooplankton, and Predators and Oceanographic Conditions Safe Operating Space for Walleye: Understanding the Conditions Needed to Sustain Recreational Fisheries in a Changing World Projected Climate and Land Use Change Impacts on Aquatic Habitats of the Lower Colorado River Basin (Regional Assessment) Linking Stream Fish Thermal Ecology and Adaptive Capacity to Inform Watershed-Based Management and Species Status Assessments Designing Climate-Resilient Habitat for At-Risk Species in the Southern Sierra Nevada Forest Assessing the Vulnerability of Native Trout in the Northern Rockies: Linking Science and Management for Climate Adaptation Climate Adaptation for Data-Limited Inland Fisheries Understanding and Forecasting Potential Recruitment of Lake Michigan Fishes The Impacts of Climate Change and Water Supply Management on Fish in the Colorado River An Assessment of Invasive Species Range Shifts in the Southeastern U.S. and Actions to Manage Them Projected Climate and Land Use Change Impacts on Aquatic Habitats in the Midwestern United States (Regional Assessment) Forecasting Climate Change Induced Effects on Recreational and Commercial Fish Populations in the Great Lakes The Influence of Stream Flow Patterns on Juvenile Salmon Growth in Southeast Alaska Impacts of Extreme Events on the Native and Nonnative Aquatic Species of Hawaiʻi Stream Ecosystem Identifying the Environmental Limits of Aquatic Species in Prairie Streams to Build Climate Resilience Developing A National Framework for Incorporating Climate Change Refugia into Conservation and Adaptation Planning Estimating Global River Fisheries Harvest Potential Developing New Strategies for Modeling and Assessing the Response of Global Inland Fisheries to Regional Changing Climate Assessing the State of Global Inland Fisheries