Monitoring and Population Ecology

Advances in technology (e.g., PIT tags) have allowed scientists to individually mark more types of species than ever before, and concurrent developments in biometrics have allowed scientists to ask more types of questions about animal populations under more circumstances. Some of these developments have been particularly useful when estimating parameters about amphibians, a group that can be difficult to sample (e.g., multiple life stages, small size, difficult to mark, high juvenile mortality).

These developments in marking and estimation have allowed scientists to ask specific questions about the effects of potential stressors or beneficial management actions on amphibian populations, and quantify these responses.

K. Cecala (ARMI) sampling a stream in Shenandoah NP for salamanders. Photo by: E. Grant.

Monitoring and Population Ecology - ARMI Papers & Reports

Trend Data Big Thicket National Preserve Occupancy Monitoring VES/VOC: Acris blanchardi, Eleutherodactylus cystignathoides, Gastrophryne carolinensis, Hyla chrysoscelis, Hyla cinerea, Incilius nebulifer, Lithobates catesbeianus, Lithobates clamitans, Lithobates grylio, Lithobates sphenocephalus, Pseudacris crucifer, Pseudacris fouquettei ( American Bullfrog, Blanchard's Cricket Frog, Cope's Gray Treefrog, Eastern Narrow-mouthed Toad, Green Frog, Green Tree Frog, Pig Frog, Rio Grande Chirping Frog, Southern Leopard Frog, Spring Peeper)
Location: Below Saltwater Barrier ; Below Saltwater Barrier
The goal of this study is to monitor anuran occupancy using standard protocols while also recording salinities, as this area is below a saltwater barrier on the Neches River and is susceptible to saltwater encroachment during tropical storm surges or periods of drought, which may impact anuran occupancy. We also added 20 sites north of the saltwater barrier as reference sites in 2012.
Trend Data Detection Probabilities and Occupancy Estimates for Amphibians at Okefenokee NWR (Winter): Hyla femoralis, Lithobates grylio ( Pig Frog, Pine Woods Treefrog)
Location: Okefenokee NWR ; Okefenokee NWR
Amphibian inventory at Okefenokee National Wildlife Refuge from August 2000 to June 2002 as part of the U.S. Department of the Interior’s national Amphibian Research and Monitoring Initiative
Trend Data Detection Probabilities and Occupancy Estimates for Amphibians at Okefenokee NWR (Fall): Hyla femoralis, Lithobates grylio, Lithobates sphenocephalus ( Pig Frog, Pine Woods Treefrog, Southern Leopard Frog)
Location: Okefenokee NWR ; Okefenokee NWR
Amphibian inventory at Okefenokee National Wildlife Refuge from August 2000 to June 2002 as part of the U.S. Department of the Interior’s national Amphibian Research and Monitoring Initiative.
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