Skip to main content
Advanced Search

Filters: Types: OGC WMS Service (X) > partyWithName: Benjamin Letcher (X)

5 results (7ms)   

Filters
Date Range
Extensions
Types
Contacts
Categories
Tag Types
Tag Schemes
View Results as: JSON ATOM CSV
thumbnail
There is growing evidence that headwater stream ecosystems are especially vulnerable to changing climate and land use, but managers are challenged by the need to address these threats at a landscape scale, often through coordination with multiple management agencies and landowners. This project sought to provide an example of cooperative landscape decision-making by addressing the conservation of headwater stream ecosystems in the face of climate change at the watershed scale. Predictive models were built for critical resources to examine the effects of the potential alternative actions on the objectives, taking account of climate effects and examining whether there are key uncertainties that impede decision making....
thumbnail
The amount of water flowing through a stream is an important driver of aquatic habitat, but scientists don’t often measure streamflow in the small stream networks that feed larger rivers. Monitoring smaller streams is especially important as climate change is causing them to (a) flood more often and more intensely, and (b) lose habitat as drought events and water temperatures increase. A better understanding of the changing patterns of flow and temperatures in small streams can help decision makers evaluate which streams will provide suitable habitat for plants and animals under a changing climate. Specific goals of this project are to 1) understand how water flow and temperature interact in small streams and 2)...
thumbnail
Climate change poses a variety of threats to biodiversity. Most efforts to assess the likely impacts of climate change on biodiversity try to rank species based on their vulnerability under changed environmental conditions. These efforts have generally not considered the ability of organisms to adjust their phenotype to the changing environment. Organisms can do this by one of two ways. First, they can adjust their phenotype via non-evolutionary pathways. Second, they can undergo adaptive evolutionary change. We used two interconnected approaches to evaluate thermal adaptation capacity in a cold-water fish species. 1) Using tagging data, we estimated thermal performance curves for wild fish. The curves indicate...
thumbnail
Salmonids (a family of fish that includes salmon, trout, and char) are a keystone species for both aquatic and terrestrial ecosystems, and can be an early warning indicator of ecosystem health. Salmonids also have strong societal values and contribute enormously to regional economies and Native American cultures. Today, many native salmonid populations are small, highly fragmented, and isolated from genetic exchange, thereby increasing their vulnerability to disturbances due to their limited ability to adapt through migration. Rising global air temperatures are altering the characteristics of aquatic ecosystems worldwide, including freshwater in the United States. Understanding the vulnerability of aquatic species...
thumbnail
Aquatic invasive species threaten our lakes, streams, and wetlands. These species not only change the biology within the waterbody, but they can change the way we use those waterbodies and the resources they produce. Those changes may have large economic impacts, such as direct management costs and indirect costs to fisheries, tourism and commerce. These species can be small like zebra mussels or large like Asian carp, but one thing they have in common is being difficult to manage and to prevent further spread. To help inform control measures for aquatic invasive species, local, state, and federal natural resource management agencies have been working to develop risk assessments to understand the potential spread...
    map background search result map search result map Projecting the Future of Headwater Streams to Inform Management Decisions The Past as a Prelude to the Future: Assessing Climate Effects on Native Trout in the U.S. Can Wildlife Species Evolve in Response to a Changing Climate? Informing Species Vulnerability Assessments Scoping the Feasibility of Incorporating Climate Change into Risk Assessments of Aquatic Invasive Species in the Upper Midwest Integrating Streamflow and Temperature to Identify Streams with Coldwater Refugia in the Northeast Scoping the Feasibility of Incorporating Climate Change into Risk Assessments of Aquatic Invasive Species in the Upper Midwest Integrating Streamflow and Temperature to Identify Streams with Coldwater Refugia in the Northeast Projecting the Future of Headwater Streams to Inform Management Decisions Can Wildlife Species Evolve in Response to a Changing Climate? Informing Species Vulnerability Assessments The Past as a Prelude to the Future: Assessing Climate Effects on Native Trout in the U.S.