WARC Researchers are using a variety of methods to assess mammal communities across the Greater Everglades.
The Science Issue and Relevance: The punctuated decline of mammal populations in the southern portion of the Greater Everglades over the last 20 years is expected to have a profound influence on the ecology of the system and the likelihood of successful ecosystem restoration. There is direct evidence that predation by the invasive Burmese python has caused these declines, and the extent of mammal declines are moving northward. Accordingly, for areas that have yet to see extensive python impacts (e.g., Arthur R. Marshall Loxahatchee National Wildlife Refuge), there is an urgent need to rigorously 1) quantify mammal communities, 2) understand the causes of mammal mortality, and 3) understand how changes in mammal populations might alter the health of the ecosystem.
Methodology for Addressing the Issue: To help address these knowledge gaps, we are assessing mammal communities across the Greater Everglades using a variety of methods. Specialized cameras help us detect both large (e.g., white-tailed deer) and small mammals (e.g., rodents), and we conduct extensive searches to find signs and tracks of mammals. We then use these data to develop models to identify where mammal populations have changed and what mammals are most vulnerable to invasive pythons. We also use radio telemetry, which lets us track the movement and survival of mammals - using the common cotton rat as our model species - in areas with extensive or minimal python activity. Finally, we are conducting experiments to better understand the important role mammals play in maintaining ecosystem heath. Carrion and native fruits have been placed in areas with various python activity. A remote camera captures the mammals’ interactions with the food resources and helps us assess how quickly and how much of the carrion and fruit is removed. This information will help us evaluate changes in mammals’ ability to remove carrion and disperse seeds and identify how the ecosystem might change as mammal populations change.
Future Steps: We plan to expand our work to further understand the patterns of mammal loss and the implications for ecosystem health. Specifically, we will examine the use of new tools to find rare mammals and we will evaluate the use of advanced molecular techniques to understand how Burmese pythons may be competing with the region’s native mammalian predators.
Below are other science projects associated with this project.
Applications of Advanced Tracking and Modeling Tools with Burmese Pythons across South Florida's Landscape
Habitat Selection of the Burmese Python in the Florida Everglades
Efficacy of eDNA as an Early Detection and Rapid Response Indicator for Burmese Pythons in the Northern Greater Everglades Ecosystem
Using Environmental DNA for Burmese Python Detection Probabilities and Range-Delimitation in Southern Florida
Ecology of and Control Strategies for Invasive Burmese Pythons (Python molurus bivitattus) in the Greater Everglades
- Overview
WARC Researchers are using a variety of methods to assess mammal communities across the Greater Everglades.
Sources/Usage: Public Domain.Common cotton rat outfitted with a radio telemetry transmitter, which allows WARC researchers to track the movement and survival of mammals in the Greater Everglades. The Science Issue and Relevance: The punctuated decline of mammal populations in the southern portion of the Greater Everglades over the last 20 years is expected to have a profound influence on the ecology of the system and the likelihood of successful ecosystem restoration. There is direct evidence that predation by the invasive Burmese python has caused these declines, and the extent of mammal declines are moving northward. Accordingly, for areas that have yet to see extensive python impacts (e.g., Arthur R. Marshall Loxahatchee National Wildlife Refuge), there is an urgent need to rigorously 1) quantify mammal communities, 2) understand the causes of mammal mortality, and 3) understand how changes in mammal populations might alter the health of the ecosystem.
Sources/Usage: Public Domain.A remote camera captures mammals’ interactions with food resources and helps assess how quickly and how much of the carrion and fruit is removed. Methodology for Addressing the Issue: To help address these knowledge gaps, we are assessing mammal communities across the Greater Everglades using a variety of methods. Specialized cameras help us detect both large (e.g., white-tailed deer) and small mammals (e.g., rodents), and we conduct extensive searches to find signs and tracks of mammals. We then use these data to develop models to identify where mammal populations have changed and what mammals are most vulnerable to invasive pythons. We also use radio telemetry, which lets us track the movement and survival of mammals - using the common cotton rat as our model species - in areas with extensive or minimal python activity. Finally, we are conducting experiments to better understand the important role mammals play in maintaining ecosystem heath. Carrion and native fruits have been placed in areas with various python activity. A remote camera captures the mammals’ interactions with the food resources and helps us assess how quickly and how much of the carrion and fruit is removed. This information will help us evaluate changes in mammals’ ability to remove carrion and disperse seeds and identify how the ecosystem might change as mammal populations change.
Future Steps: We plan to expand our work to further understand the patterns of mammal loss and the implications for ecosystem health. Specifically, we will examine the use of new tools to find rare mammals and we will evaluate the use of advanced molecular techniques to understand how Burmese pythons may be competing with the region’s native mammalian predators.
- Science
Below are other science projects associated with this project.
Applications of Advanced Tracking and Modeling Tools with Burmese Pythons across South Florida's Landscape
Researchers will determine movement rates and habitat-use patterns of pythons across the South Florida landscape by conducting a telemetry study tracking pythons simultaneously in several locationsHabitat Selection of the Burmese Python in the Florida Everglades
Researchers plotted locations of radio-tagged pythons to create a habitat suitability model.Efficacy of eDNA as an Early Detection and Rapid Response Indicator for Burmese Pythons in the Northern Greater Everglades Ecosystem
Traditional approaches to locating Burmese pythons - including visual searches and trapping - have resulted in low detection. Environmental DNA - or eDNA - is increasingly being used to detect the presence of non-native species, particularly when traditional methods may not be adequate.Using Environmental DNA for Burmese Python Detection Probabilities and Range-Delimitation in Southern Florida
Current tools for detection of Burmese pythons in South Florida have resulted in low detection rates. Environmental DNA - eDNA - has shown to be effective at detecting these invasive snakes, and can help to determine range limits for the species, information that is critical for management and control efforts.Ecology of and Control Strategies for Invasive Burmese Pythons (Python molurus bivitattus) in the Greater Everglades
Telemetry tracking of captured pythons reveals movement patterns of the invasive Burmese python in the Greater Everglades, information that managers can use to prioritize python control efforts. - Publications