A5058882397- Amphibian and Reptile Biology
- Species Distribution and Climate Change
- Animal Behavior and Reproduction
- Turtle Biology and Conservation
- Bat Biology and Ecology Studies
- Mosquito-borne diseases and control
- Wildlife Ecology and Conservation
- Physiological and biochemical adaptations
- Identification and Quantification in Food
- Meat and Animal Product Quality
- Viral Infections and Vectors
- Effects of Environmental Stressors on Livestock
- Insect and Arachnid Ecology and Behavior
- Wildlife-Road Interactions and Conservation
- Genetic diversity and population structure
- Botany and Plant Ecology Studies
- Environmental DNA in Biodiversity Studies
- Rangeland and Wildlife Management
- Marine animal studies overview
- Dermatological diseases and infestations
- Vector-borne infectious diseases
- Animal Disease Management and Epidemiology
- Primate Behavior and Ecology
- Coastal wetland ecosystem dynamics
- Yersinia bacterium, plague, ectoparasites research
Universidad de Los Andes
2023
Oregon State University
2013-2022
Oregon Department of Fish and Wildlife
2019-2022
Universidad de Antioquia
2010
Many ecologists have lamented the demise of natural history and attributed this decline to a misguided view that is outdated unscientific. Although there perception focus in ecology conservation shifted away from descriptive research training toward hypothetico-deductive research, we argue has entered new phase call “next-generation history.” This renaissance characterized by technological statistical advances aid collecting detailed observations systematically over broad spatial temporal...
Variation in host responses to pathogens can have cascading effects on populations and communities when some individuals or groups of display disproportionate vulnerability infection differ their competence transmit infection. The fungal pathogen, Batrachochytrium dendrobatidis (Bd) has been detected almost 700 different amphibian species is implicated numerous global population declines. Identifying key hosts the amphibian-Bd system–those who are at greatest risk pose for others–is...
Anthropogenic and natural stressors often interact to affect organisms. Amphibian populations are undergoing unprecedented declines extinctions with pesticides emerging infectious diseases implicated as causal factors. Although these factors co-occur, their effects on amphibians usually examined in isolation. We hypothesized that exposure of larval metamorphic ecologically relevant concentrations pesticide mixtures would increase post-metamorphic susceptibility the fungus Batrachochytrium...
Abstract Tropical alpine peatlands are important carbon reservoirs and a critical component of local hydrological cycles. In high elevation slow decomposition rates result from nutrient‐poor substrate resistant to decay. The responses páramo peatland ecosystems increased nutrient additions physical disturbance due agricultural activities unknown. Here, we conducted two‐year fertilization experiment in Sphagnum —dominated the Central Andes Colombia. We hypothesized that will diminish ability...
Many organisms show adaptive phenotypic plasticity in response to environmental variation. Some factors may, however, impose constraints on the ability of respond other factors. The neotropical treefrog Dendropsophus ebraccatus lays eggs both above water leaves and directly water, thereby exposing embryos different abiotic conditions predator communities. Rising pond levels can also flood arboreal clutches after rainstorms. We tested for predator-induced hatching submerged D. egg masses...
Carotenoids are considered beneficial nutrients because they provide increased immune capacity. Although carotenoid research has been conducted in many vertebrates, little done amphibians, a group that is experiencing global population declines from numerous causes, including disease. We raised two amphibian species through metamorphosis on three diets to quantify the effects life-history traits and post-metamorphic susceptibility fungal pathogen (Batrachochytrium dendrobatidis; Bd)....
Amphibian declines have been linked to numerous factors, including pesticide use and the fungal pathogen Batrachochytrium dendrobatidis (Bd). Moreover, research has suggested a link between amphibian sensitivity Bd exposure. We simultaneously exposed postmetamorphic American toads (Anaxyrus americanus), western (A. boreas), spring peepers (Pseudacris crucifer), Pacific treefrogs (P. regilla), leopard frogs (Lithobates pipiens), Cascades (Rana cascadae) factorial combination of two treatments...
Changing patterns of precipitation and drought will dramatically influence the distribution persistence lentic habitats. Pond-breeding amphibians can often respond to changes in habitat by plastically shifting behavioral developmental trait response. However, fitness tradeoffs inherent life history strategies carry over impact development, behavior, later stages. In this experiment, we investigated carryover effects hydroperiod permanence on movement behavior newly-metamorphosed juvenile...
Abstract Understanding how a pathogen can grow on different substrates and this growth impacts its dispersal are critical to understanding the risks control of emerging infectious diseases. Pseudogymnoascus destructans (Pd) causes white-nose syndrome (WNS) in many bat species persist in, transmit from, environment. We experimentally evaluated Pd common better understand mechanisms persistence, transmission viability. inoculated autoclaved guano, fresh soil, wood with live fungus (1) whether...
The development of antipredator traits is dependent on the frequency and intensity predator exposure over evolutionary ecological time. We hypothesized that prey species would respond with increasing accuracy when exposed to predators across generational, ontogenetic, immediate time scales. assessed larval Pacific chorus frog (PSRE; Pseudacris regilla) individuals varied in population sympatry, embryonic conditioning, stocked populations rainbow trout (Oncorhynchus mykiss). Using PSRE from...
Abstract The mechanisms by which invasive species negatively affect native include competition, predation, and the introduction of novel pathogens. Moreover, if an is a competent disease reservoir, it may facilitate long-term maintenance spread pathogens in ecological assemblages drive extinction less tolerant or resistant species. Disease-driven loss biodiversity exemplified amphibian–chytrid fungus system. chytridiomycosis caused aquatic chytrid Batrachochytrium dendrobatidis (Bd) anurans...
Ranaviruses can cause mass mortality events in amphibians, thereby becoming a threat to populations that are already facing dramatic declines. affect all life stages and persist multiple amphibian hosts. The detrimental effects of ranavirus infections have been observed the UK North America. In Central South America, virus has reported several countries, but presence genus Ranavirus (Rv) Colombia is unknown. To help fill this knowledge gap, we surveyed for Rv 60 species frogs (including one...
Pseudogymnoascus destructans (Pd), the causative agent of white-nose syndrome in bats (WNS), has led to dramatic declines bat populations eastern North America. In spring 2016, WNS was first detected at several locations Washington State, USA, which prompted need for large scale surveillance efforts monitor spread Pd. Pd is typically using invasive methods requiring capturing and swabbing individual bats. However, can also be guano, may provide an efficient, affordable, noninvasive means...
Invasive species pose a major threat to global biodiversity. The effects of invasive can be strongly influenced and potentially mediated by their reproductive characteristics, such as fecundity, egg production, duration number events. Selection for smaller body size at first reproduction also play role in establishment, facilitating colonization spread. American bullfrog, native the eastern U.S. (Lithobates catesbeianus), is that has invaded more than 40 countries across 4 continents. This...
Emerging infectious diseases are one of the multiple factors contributing to current “biodiversity crisis”. As part worldwide biodiversity crisis, amphibian populations declining globally. Chytridiomycosis, an emerging disease, caused by fungal pathogen Batrachochytrium dendrobatidis ( Bd ), is a major cause population declines. This fungus primarily affects keratinized structures in larval, juvenile, and adult amphibians as well heart function. However, we know little about how can impact...
<i>Ichthyology & Herpetology</i> (formerly <i>Copeia</i>) publishes work on the biology of fishes, amphibians, and reptiles, or using those organisms as models for testing hypotheses broad significance.