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77 record(s) found.

Papers & Reports Assessing amphibian richness, rarity, threats, and conservation prospects for U.S. national park network [UPDATE TITLE]
Authors: Benjamin Lafrance; Andrew M Ray; Michael T Tercek; Robert N Fisher; Blake R Hossack
Date: 2024-11 | Outlet: npj Biodiversity
We assessed amphibian diversity, rarity, and threats across the U.S. National Park System, which covers 3.5% of the U.S. and 12% of federal lands. At least 230 of 354 (65%) amphibian species native to the U.S. occur in parks. Of the species documented in parks, 17% are considered at-risk globally and 20% are uncategorized, reflecting...
Papers & Reports Native amphibian toxin reduces invasive crayfish feeding with potential benefits to stream biodiversity
Authors: Gary Bucciarelli; Sierra J. Smith; Justin J. Choe; Phoebe D. Shin; Robert N Fisher; Lee B Kats
Date: 2023-09-13 | Outlet: BMC Ecology and Evolution 23, 51
Biodiversity is generally reduced when non-native species invade an ecosystem. Invasive crayfish, Procambarus clarkii, populate California freshwater streams, and in the Santa Monica Mountains (Los Angeles, USA), their introduction has led to trophic cascades due to omnivorous feeding behavior and a rapid rate of population growth. The...
Papers & Reports BioLake: A first assessment of lake temperature-derived bioclimatic predictors for aquatic invasive species
Authors: Ryan C Burner; Wesley M. Daniel; Peder S. Engelstad; Christopher J. Churchill; Richard E Erickson
Date: 2023-07-10 | Outlet: Ecosphere 14(7):e4616
Aquatic invasive species (AIS) present major ecological and economic challenges globally, endangering ecosystems and human livelihoods. Managers and policy makers thus need tools to predict invasion risk and prioritize species and areas of concern, and they often use native range climate matching to determine whether a species could persist in a...
Papers & Reports Successful eradication of invasive American bullfrogs leads to co-extirpation of emerging pathogens
Authors: Blake R Hossack; D Hall; C L Crawford; Caren S Goldberg; Erin Muths; Brent H Sigafus; Thierry C Chambert
Date: 2023 | Outlet: Conservation Letters
Interventions of host-pathogen dynamics provide strong tests of relationships, yet they are still rarely applied across multiple populations. After American Bullfrogs (Rana catesbeiana) invaded a wildlife refuge where federally threatened Chiricahua Leopard Frogs (R. chiricahuensis) were reintroduced 12 years prior, managers launched a...
Papers & Reports Prioritizing the risk and management of introduced species in a landscape with high indigenous biodiversity
Authors: Jonathan Q Richmond; Jennifer Kingston; Brittany Ewing; Wendy Bear; Stacie A Hathaway; Cedric Lee; Camm C. Swift; Kristine L Preston; Allison J Schultz; Barbara E. Kus; Kerwin Russel; Philip Unitt; B Hollingsworth; Robert E Espinoza; Michael Wall; S Tremor; Kai Palenscar; Robert N Fisher
Date: 2023 | Outlet: Bulletin of the Southern California Academy of Sciences
Risk analysis protocols for prioritizing the management of non-native species are numerous, yet few incorporate risk and management in the same analysis or accommodate a broad diversity of taxa outside of a specific geographic area. We adapted a protocol that accounts for these factors to address non-native animal species in the Southern...
Papers & Reports Keeping the Heat On: Weighted Surveillance for Chytrid Fungus in Dixie Valley Toads
Authors: Matthew J Forrest; Brian J Halstead; Daniel A Grear; Patrick M Kleeman; Brian D Todd; Oliver J Miano; Kris Urquhart
Date: 2023-07-24 | Outlet: Journal of Wildlife Diseases
Introduced fungal pathogens have caused declines and extinctions of naive wildlife populations across vertebrate classes. Consequences of introduced pathogens to hosts with small ranges might be especially severe because of limited redundancy to rescue populations and lower abundance that may limit the resilience of populations to perturbations...
Papers & Reports Empirical evidence for effects of invasive American Bullfrogs on occurrence of native amphibians and emerging pathogens
Authors: Blake R Hossack; Emily B Oja; Audrey Owens; D Hall; C L Crawford; Caren S Goldberg; S Hedwall; J A Lemos-Espinal; S MacVean; Magnus McCaffery; Erin Muths; A McCall; C Mosley; Brent H Sigafus; M J Sredl,; James C Rorabaugh
Date: 2023 | Outlet: Ecological Applications
Invasive species and emerging infectious diseases are two of the greatest
threats to biodiversity. American Bullfrogs (Rana [Lithobates] catesbeiana),
which have been introduced to many parts of the world, are often linked with
declines in native amphibians via predation and the spread of emerging pathogens
such as amphibian...
Papers & Reports Invasive bullfrogs maintain MHC polymorphism including alleles associated with chytrid fungal infection
Authors: Jacob LaFond; Katherine R Martin; Hollis Dahn; Jonathan Q Richmond; Robert W Murphy; Njal Rollinson; Anna E Savage
Date: 2022-05-19 | Outlet: Integrative and Comparative Biology 62:262–274
Maintenance of genetic diversity at adaptive loci may facilitate invasions by non-native species by allowing populations to adapt to novel environments, despite the loss of diversity at neutral loci that typically occurs during founder events. To evaluate this prediction, we compared genetic diversity at major histocompatibility complex (MHC) and...
Papers & Reports Looking ahead, guided by the past: The role of U.S. national parks in amphibian research and conservation
Authors: Brian J Halstead; Andrew M Ray; Erin Muths; Evan HC Grant; Rob L Grasso; Michael J Adams; Katy S Delaney; Jane Carlson; Blake R Hossack
Date: 2022-03 | Outlet: Ecological Indicators
Protected areas like national parks are essential elements of conservation because they limit human influence on the landscape, which protects biodiversity and ecosystem function. The role of national parks in conservation, however, often goes far beyond limiting human influence. The U.S. National Park Service and its system of land units...
Papers & Reports Impacts of a Non-indigenous Ecosystem Engineer, the American Beaver (Castor canadensis), in a Biodiversity Hotspot
Authors: Jonathan Q Richmond; Camm C. Swift; Thomas A. Wake; Cheryl S Brehme; Kristine L Preston; Barbara E. Kus; Edward L Ervin; S Tremor; Tritia Matsuda; Robert N Fisher
Date: 2021-11-18 | Outlet: Frontiers in Conservation Science 2:752400
Non-native species having high per capita impacts in invaded communities are those that modulate resource availability and alter disturbance regimes in ways that are biologically incompatible with the native biota. In areas where it has been introduced by humans, American beaver (Castor canadensis) is an iconic example of such species due...
Papers & Reports Site- and individual-level contamination affects infection prevalence of an emerging infectious disease of amphibians
Authors: Kelly L Smalling; Brittany A Mosher; L Iwanowicz; Keith A Loftin; Adam Boehlke; C R Muletz; N Cortes-Rodriguez; R Femmer; Evan HC Grant
Date: 2022-01-09 | Outlet: Environmental Toxicology and Chemistry
Emerging infectious disease outbreaks are one of multiple stressors responsible for amphibian declines globally. In the northeastern United States, ranaviral diseases are prevalent in amphibians and other ectothermic species, but there is still uncertainty as to whether their presence is leading to population level effects. Further, there is also...
Papers & Reports Conservation of Northwestern and Southwestern Pond Turtles: Threats, Population Size Estimates, and Population Viability Analysis
Authors: S Manzo; E Nicholson; Z Devereux; Robert N Fisher; Christopher W Brown; P Scott; H B Shaffer
Date: 2021-12 | Outlet: Journal of Fish and Wildlife Management 12(2):485-501;e1944-687X
Accurate status assessments of long-lived, widely distributed taxa depend on the availability of long-term monitoring data from multiple populations. However, monitoring populations across large temporal and spatial scales is often beyond the scope of any one researcher or research group. Consequently, wildlife managers may be tasked with...
Papers & Reports Resilience of native amphibian communities following catastrophic drought: evidence from a decade of regional-scale monitoring
Authors: W Moss; T McDevitt-Galles; Erin Muths; Steven Bobzien; J Purificato; P TJ Johnson
1. The increasing frequency and severity of drought has the potential to exacerbate existing global amphibian declines. However, interactions between drought and coincident stressors, coupled with high interannual variability in amphibian abundances, can mask the extent and underlying mechanisms of drought-induced declines. The application of...
Papers & Reports Widespread Ranavirus and Perkinsea infections in Cuban Treefrogs (Osteopilus septentrionalis) invading New Orleans, USA
Authors: N Galt; Matthew S Atkinson; Brad M Glorioso; Hardin J Waddle; M Litton; Anna E Savage
Date: 2021-04-30 | Outlet: Herpetological Conservation and Biology
Papers & Reports When Introduced Prey Violates Trophic Hierarchy: Conservation of an Endangered Predator
Authors: Richard Kim; Brian J Halstead; E Routman; Julie Andersen
Date: 2021-03-03 | Outlet: Biological Conservation 256
Introduced species often disrupt established food webs, but some native predators can come to rely on introduced prey. Understanding the net effects of the non-natives on imperiled predators is crucial for planning conservation measures. The invasive American bullfrog (Lithobates catesbeianus) can be prey, predator, and competitor for the...
Papers & Reports Slender salamanders (genus Batrachoseps) reveal Southern California to be a center for the diversification, persistence, and introduction of salamander lineages
Authors: E Jockusch; R Hansen; Robert N Fisher; D B Wake
Date: 2020-08-14 | Outlet: PeerJ 8:e9599
Background. The southern California biodiversity hotspot has had a complex geological history, with both plate tectonic forces and sea level changes repeatedly reconfiguring the region, and likely driving both lineage splittings and extinctions. Here we investigate patterns of genetic divergence in two species of slender salamanders...
Papers & Reports OSTEOPILUS SEPTENTRIONALIS (Cuban Treefrog)
Authors: Brad M Glorioso; P Vanbergen; J Roy; M Walter; L Leonpacher; M Freistak
Date: 2018 | Outlet: Herpetological Review 49(1):70-71
A note on the geographic distribution of the Cuban Treefrog (Osteopilus septentrionalis), describing new parish records in East Baton Rouge Parish and Lafayette Parish.
Papers & Reports Historical museum collections and contemporary population studies implicate roads and introduced predatory bullfrogs in the decline of western pond turtles
Authors: E Nicholson; S Manzo; Z Devereux; T Morgan; Robert N Fisher; Christopher W Brown; Rosi G Dagit; P Scott; H Shaffer
Date: 2020-06-12 | Outlet: PeerJ 8:e9248 DOI 10.7717/peerj.9248
The western pond turtle (WPT), recently separated into two paripatrically distributed species (Emys pallida and Emys marmorata), is experiencing significant reductions in its range and population size. In addition to habitat loss, two potential causes of decline are female-biased road mortality and high juvenile mortality from...
Papers & Reports OSTEOPILUS SEPTENTRIONALIS (Cuban Treefrog)
Authors: Brad M Glorioso; A P Steece; Z K Lemann; R Lazare; James W Beck
Date: 2016 | Outlet: Herpetological Review 47(2):249
A note on the geographic distribution of the Cuban Treefrog (Osteopilus septentrionalis), describing new parish records in St. Tammany Parish and Orleans Parish.
Papers & Reports OSTEOPILUS SEPTENTRIONALIS (Cuban Treefrog)
Authors: Brad M Glorioso; K Macedo; B R Maldonado; C J Hillard; I N Morenc; E S Grimes
Date: 2018 | Outlet: Herpetological Review 49(4):709
A note on the geographic distribution of the Cuban Treefrog (Osteopilus septentrionalis), describing a new parish record and probable establishment in St. Charles Parish.