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Biological Threats and Invasive Species

Invasive, nonnative species of plants, animals, and disease organisms can quickly spread and affect nearly all terrestrial and aquatic ecosystems. Invasive species have become one of the greatest environmental challenges of the twenty-first century in economic, environmental, and human health costs, with an estimated effect in the United States of more than $120 billion per year. The Invasive Species Science (ISS) Branch provides research and technical assistance relating to management concerns for invasive species, including understanding how these species are introduced, identifying areas vulnerable to invasion, forecasting invasions, and developing control methods. To disseminate this information, branch scientists are developing platforms to share invasive species information with DOI cooperators, other agency partners, and the public. Experts at the Fort Collins Science Center that study biological threats and invasive species also have extensive herpetological and population biology expertise that is applied to harmful reptile invaders such as the Brown Treesnake on Guam and Burmese Python in Florida.

Filter Total Items: 36

Invasive Annual Grass (IAG) Spatial Dataset Compilation and Synthesis

USGS is working closely with partners in the Bureau of Land Management (BLM), U.S. Fish and Wildlife Service (USFWS), and the Intermountain West Joint Venture (IMJV) to collect and summarize spatial datasets that describe measurable aspects of invasive annual grasses (e.g., biomass or presence) across the western United Stated and beyond. The products developed through this project provide...
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Invasive Annual Grass (IAG) Spatial Dataset Compilation and Synthesis

USGS is working closely with partners in the Bureau of Land Management (BLM), U.S. Fish and Wildlife Service (USFWS), and the Intermountain West Joint Venture (IMJV) to collect and summarize spatial datasets that describe measurable aspects of invasive annual grasses (e.g., biomass or presence) across the western United Stated and beyond. The products developed through this project provide...
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USGS Coordinated Burmese Python Research Strategy for South Florida (FY21 – FY27)

Wetland and Aquatic Research Center and Fort Collins Science Center are coordinating a long-term, landscape-scale Burmese python research strategy for South Florida.
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USGS Coordinated Burmese Python Research Strategy for South Florida (FY21 – FY27)

Wetland and Aquatic Research Center and Fort Collins Science Center are coordinating a long-term, landscape-scale Burmese python research strategy for South Florida.
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Biology, Impacts and Control of Invasive Reptiles in the Pacific

Research on Guam has led to development and validation of numerous effective control tools, including the advancement of reptile control to support native species recovery.
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Biology, Impacts and Control of Invasive Reptiles in the Pacific

Research on Guam has led to development and validation of numerous effective control tools, including the advancement of reptile control to support native species recovery.
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Mapping Chronic Wasting Disease Management: Identify Opportunities for Intervention

This research effort is an interagency partnership between U.S. Geological Survey and U.S. Fish and Wildlife Service to model the social-ecological system that encompasses chronic wasting disease management in the United States. Chronic wasting disease (CWD) is a fatal, neurologically degenerative disease that impacts many cervid species in North America (e.g., elk, moose, mule deer, and white...
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Mapping Chronic Wasting Disease Management: Identify Opportunities for Intervention

This research effort is an interagency partnership between U.S. Geological Survey and U.S. Fish and Wildlife Service to model the social-ecological system that encompasses chronic wasting disease management in the United States. Chronic wasting disease (CWD) is a fatal, neurologically degenerative disease that impacts many cervid species in North America (e.g., elk, moose, mule deer, and white...
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Assessing the Proliferation, Connectivity, and Consequences of Invasive Fine Fuels

Invasive annual grasses (fine fuels) are a significant challenge for land and wildlife management.
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Assessing the Proliferation, Connectivity, and Consequences of Invasive Fine Fuels

Invasive annual grasses (fine fuels) are a significant challenge for land and wildlife management.
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Soil-Climate Modeling To Improve Understanding of Pattern and Processes in Sagebrush Ecosystems: A Spatially Explicit Soil Classification

Resistance and resilience concepts provide an important framework for sagebrush habitat management. Existing spatial products have been developed using NRCS soil data; models using new data and methods can improve these products.
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Soil-Climate Modeling To Improve Understanding of Pattern and Processes in Sagebrush Ecosystems: A Spatially Explicit Soil Classification

Resistance and resilience concepts provide an important framework for sagebrush habitat management. Existing spatial products have been developed using NRCS soil data; models using new data and methods can improve these products.
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Economics of Invasive Species

In managing invasive species, land managers and policy makers need information to help allocate scarce resources as efficiently and effectively as possible.
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Economics of Invasive Species

In managing invasive species, land managers and policy makers need information to help allocate scarce resources as efficiently and effectively as possible.
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Biology, Impacts and Control of Invasive Reptiles in the Everglades

Invasive species are considered to be second only to habitat degradation in terms of negative impacts on the Earth’s ecosystems, and our scientists make up a significant proportion of the global expertise in the rapidly-growing problem of invasive reptiles.
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Biology, Impacts and Control of Invasive Reptiles in the Everglades

Invasive species are considered to be second only to habitat degradation in terms of negative impacts on the Earth’s ecosystems, and our scientists make up a significant proportion of the global expertise in the rapidly-growing problem of invasive reptiles.
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Species Distribution Modeling

A requirement for managing a species, be it a common native species, a species of conservation concern, or an invasive species, is having some information on its distribution and potential drivers of distribution. Branch scientists have been tackling the question of where these types of species are and where they might be in the future.
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Species Distribution Modeling

A requirement for managing a species, be it a common native species, a species of conservation concern, or an invasive species, is having some information on its distribution and potential drivers of distribution. Branch scientists have been tackling the question of where these types of species are and where they might be in the future.
Learn More

Ecology and Management of Invasive Riparian Plants

Due to high rates of disturbance and human activity, streamside or “riparian” areas are prone to colonization and spread of invasive plants. In the western United States, hundreds of thousands of riparian acres are occupied by the invasive shrubs/trees tamarisk and Russian olive, as well as numerous exotic herbaceous plants. Our work focuses on understanding the factors driving the distribution...
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Ecology and Management of Invasive Riparian Plants

Due to high rates of disturbance and human activity, streamside or “riparian” areas are prone to colonization and spread of invasive plants. In the western United States, hundreds of thousands of riparian acres are occupied by the invasive shrubs/trees tamarisk and Russian olive, as well as numerous exotic herbaceous plants. Our work focuses on understanding the factors driving the distribution...
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Erosion and Invasive Saltcedar

Formation of arroyos in the late 1800s greatly increased erosion across the southwestern United States. Since the 1930s, however, this erosion has decreased, partly because of bank stabilization by introduced saltcedar. With Isleta Pueblo Indian Nation, the Aquatic Systems Branch developed a new sediment dating method using saltcedar tree rings. We applied the method in a landmark study of arroyo...
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Erosion and Invasive Saltcedar

Formation of arroyos in the late 1800s greatly increased erosion across the southwestern United States. Since the 1930s, however, this erosion has decreased, partly because of bank stabilization by introduced saltcedar. With Isleta Pueblo Indian Nation, the Aquatic Systems Branch developed a new sediment dating method using saltcedar tree rings. We applied the method in a landmark study of arroyo...
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USGS Everglades Research Offices - Florida

The Daniel Beard Center in Everglades National Park provides the base for most of the field work done on the control of invasive reptiles by USGS Fort Collins Science Center staff. The team works in Everglades National Park, Big Cypress National Preserve, Crocodile Lake National Wildlife Refuge, and other parts of the Greater Everglades Ecosystem focusing on, among other species of concern...
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USGS Everglades Research Offices - Florida

The Daniel Beard Center in Everglades National Park provides the base for most of the field work done on the control of invasive reptiles by USGS Fort Collins Science Center staff. The team works in Everglades National Park, Big Cypress National Preserve, Crocodile Lake National Wildlife Refuge, and other parts of the Greater Everglades Ecosystem focusing on, among other species of concern...
Learn More