A5043807286- Turtle Biology and Conservation
- Amphibian and Reptile Biology
- Wildlife Ecology and Conservation
- Fish Ecology and Management Studies
- Species Distribution and Climate Change
- Animal Behavior and Reproduction
- Avian ecology and behavior
- Marine animal studies overview
- Physiological and biochemical adaptations
- Fish Biology and Ecology Studies
- Bird parasitology and diseases
- Aquatic Invertebrate Ecology and Behavior
- Wildlife-Road Interactions and Conservation
- Plant and animal studies
- Ecology and biodiversity studies
- Ecology and Vegetation Dynamics Studies
- Animal Ecology and Behavior Studies
- Parasite Biology and Host Interactions
- Spider Taxonomy and Behavior Studies
- Animal and Plant Science Education
- Ichthyology and Marine Biology
- Genetic diversity and population structure
- Radioactive contamination and transfer
- Risk Perception and Management
- Insect and Arachnid Ecology and Behavior
South Carolina Department of Natural Resources
2012-2024
Savannah River National Laboratory
2014-2023
University of Georgia
2014-2023
University of South Carolina Aiken
2009
Davidson College
2002
Ehlers-Danlos Society
1989
Creighton University
1989
Wake Forest University
1978
Reports of declining amphibian populations in many parts the world are numerous, but supporting long-term census data generally unavailable. Census from 1979 to 1990 for three salamander species and one frog at a breeding pond South Carolina showed fluctuations substantial magnitude both size recruitment juveniles. Breeding population sizes exhibited no overall trend increased fourth. Recent droughts account satisfactorily an increase failures. These illustrate that distinguish between...
Since their first use in the mid-1980s, passive integrated transponder devices (PIT tags) have allowed innovative investigations into numerous biological traits of animals.The tiny, coded markers injected individual animals allow assessment growth rates, movement patterns, and survivorship for many species a manner more reliable than traditional approaches externally marking identification.PIT tags also been used to confirm identity zoo animals, pets, protected that illegally removed from...
Of the 356 species of turtles worldwide, approximately 61% are threatened or already extinct. Turtles among most major groups vertebrates, in general, more so than birds, mammals, fishes even much besieged amphibians. Reasons for dire situation worldwide include familiar list impacts to other including habitat destruction, unsustainable overexploitation pets and food, climate change (many have environmental sex determination). Two notable characteristics pre-Anthropocene were their massive...
There are currently ca. 317 recognized species of turtles and tortoises in the world. Of those that have been assessed on IUCN Red List, 63% considered threatened, 10% critically endangered, with 42% all known turtle threatened. Without directed strategic conservation planning, a significant portion diversity could be lost over next century. Toward effort, we compiled museum literature occurrence records for world's freshwater to determine their distributions identify priority regions...
We present a review and analysis of the conservation status International Union for Conservation Nature (IUCN) threat categories all 360 currently recognized species extant recently extinct turtles tortoises (Order Testudines). Our is based on 2018 IUCN Red List 251 listed species, augmented by provisional assessments Tortoise Freshwater Turtle Specialist Group (TFTSG) 109 unlisted freshwater turtles, as well re-assessments several outdated assessments. Of tortoises, this combined indicates...
Some freshwater turtles appear unable to produce eggs large enough achieve the balance between size and number of predicted by optimal egg theory. We present evidence that pelvic girdle structure constrains thus offspring in females smaller-bodied species (Chrysemys picta Deirochelys reticularia). The constraint is demonstrated correspondence slopes increase aperture width with increasing body size. This appears be relaxed a larger-bodied (Pseudemys scripta), which relative greater than...
Abstract: Despite the continuing loss of wetland habitats and associated declines in amphibian populations, attempts to translate losses into measurable ecosystems have been lacking. We estimated potential productivity from community that would be compromised by a single isolated has protected most industrial, agricultural, urban impacts for past 54 years. used continuous drift fence at Ellenton Bay, 10‐ha freshwater on Savannah River Site, near Aiken, South Carolina (U.S.A.), sample all...
Roads affect animal survivorship and behavior thereby can act as a barrier to movement, which exacerbates habitat fragmentation disrupts landscape permeability. Field experiments demonstrated that interspecific differences in ecology of snakes affected responses species when they encountered crossed roads. The probability crossing road varied significantly among southeastern U.S. snakes, with smaller exhibiting higher levels avoidance. Species also differed speeds, venomous more slowly than...
Harvesting timber is a common form of land use that has the potential to cause declines in amphibian populations.It essential understand behavior and fate individuals resulting consequences for vital rates (birth, death, immigration, emigration) under different forest management conditions.We report on experimental studies conducted three regions United States identify mechanisms responses by pond-breeding amphibians harvest treatments.Our demonstrate life stages related oviposition larval...
Abstract Recent studies suggest that freshwater turtle populations are becoming increasingly male‐biased. A hypothesized cause is a greater vulnerability of female turtles to road mortality. We evaluated this hypothesis by comparing sex ratios from published and unpublished population surveys conducted on‐ versus off‐roads. Among 38 166 157 reporting ratios, we found consistently larger fraction in samples on‐roads (61%) than off‐roads (41%). conclude indeed more likely cross roadways males,...
Because freshwater wetlands often support diverse and unique species assemblages, wetland loss is a primary concern in biological conservation. U. S. federal statutes protect many by deterring development within delineated borders that segregate habitats from upland regions. In addition, some state local jurisdictions mandate buffer zones afford varying levels of protection to adjacent wetlands. We used geographic information system analysis test the adequacy determining degree which...
Climate change has had a significant impact globally on the timing of ecological events such as reproduction and migration in many species. Here, we examined phenology reproductive migrations 10 amphibian species at wetland South Carolina, USA using 30 year dataset. We show for first time that two autumn-breeding amphibians are breeding increasingly later recent years, coincident with an estimated 1.2°C increase local overnight air temperatures during September through February pre-breeding...
Turtles appear to live longer than most other species of vertebrates, according both maximal lifespans from zoo records and survivorship patterns in natural populations. Turtle longevity may reflect low metabolic activity, an absence physiological anatomical senility, a large investment the adult's protective shell, life history with long maturation period.