A5051049087- Paleontology and Stratigraphy of Fossils
- Marine Biology and Ecology Research
- Species Distribution and Climate Change
- Evolution and Paleontology Studies
- Geology and Paleoclimatology Research
- Isotope Analysis in Ecology
- Aquatic Invertebrate Ecology and Behavior
- Genetic diversity and population structure
- Ecology and Vegetation Dynamics Studies
- Marine and environmental studies
- Paleontology and Evolutionary Biology
- Geological Studies and Exploration
- Geological formations and processes
- Marine and fisheries research
- Ichthyology and Marine Biology
- Geological Formations and Processes Exploration
- Invertebrate Taxonomy and Ecology
- Geological and Geochemical Analysis
- Wildlife Ecology and Conservation
- Geochemistry and Elemental Analysis
- scientometrics and bibliometrics research
- Zoonotic diseases and public health
- Plant Taxonomy and Phylogenetics
- Forest Ecology and Biodiversity Studies
- Archaeology and ancient environmental studies
Ohio University
2014-2023
University of Tennessee at Knoxville
2022-2023
Planetary Science Institute
2023
Stanford University
2015
Museum für Naturkunde
2015
GNS Science
2015
University of Minnesota System
2015
University College London
2015
Friedrich-Alexander-Universität Erlangen-Nürnberg
2015
University of California, Berkeley
2015
Abstract Aim To investigate relative niche stability in species responses to various types of environmental pressure (biotic and abiotic) on geological time‐scales using the fossil record. Location The case study focuses Late Ordovician articulate brachiopods Cincinnati Arch eastern North America. Methods Species niches were modelled for a suite brachiopod based five variables inferred from sedimentary parameters GARP M axent . Niche was assessed by comparison (1) degree overlap distribution...
Abstract Ecological niche modeling (ENM) is a quantitative approach to predict species’ abiotic requirements. It correlative technique, requiring geographically explicit information on species occurrences and the suites of environmental conditions experienced at each occurrence point. The output these models set suitability rules that can be projected through time test biogeographic, ecologic, evolutionary hypotheses. Although developed by biologists used extensively in modern, ENM its early...
During the Late Devonian Biodiversity Crisis, primary driver of biodiversity decline was dramatic reduction in speciation rates, not elevated extinction rates; however, causes have been previously unstudied. Speciation, formation new species from ancestral populations, occurs by two allopatric mechanisms: vicariance, where population is passively divided into large subpopulations that later diverge and form daughter species, dispersal, which a small subset actively migrates then diverges to...
The subfamily Equinae in the Great Plains region of North America underwent a dramatic radiation and subsequent decline as climate changed from warm humid middle Miocene to cooler more arid conditions during late Miocene. Here we use ecological niche modeling (ENM), specifically GARP (Genetic Algorithm using Rule-set Prediction) system, reconstruct geographic distribution individual species two time slices through early Pliocene. This method combines known occurrence points with...
Niche conservation is not ubiquitous among all species or environmental changes. Identifying the underlying basis for variable responses important efforts and macroevolutionary theory requires comparing multiple clades types of change. To examine this issue, niche stability was analyzed a phylogenetically diverse suite invertebrates that inhabited epicontinental seas eastern North America during Late Ordovician Period (∼450 Ma). These taxa experienced fluctuating sea level regional biotic...
Species invasions are pervasive in Earth history, yet the ecological and evolutionary consequences vary greatly. Ancient invasion events can be organized a hierarchy of increasing intensity from ephemeral to globally invasive regimes. Each level exhibits emergent properties exceeding sum interactions at lower levels. Hierarchy levels correspond to, but do not always exactly correlate with, geographic extent success. The impacts lower-level negligible or result temporary community...
Abstract Aim The utility of GIS‐based and phylogenetic biogeographical analysis in palaeobiogeography is reviewed with reference to its ability elucidate patterns interest for modern conservation biology, specifically the long‐term effects invasive species. Location Emphasis on Appalachian basin mid‐continent North America during Devonian. Global palaeobiogeographical Cambrian are also considered. Methods Palaeobiogeographical assessed within a GIS framework, including both direct range...
Geologic process, including tectonics and global climate change, profoundly impact the evolution of life because they have propensity to facilitate episodes biogeographic differentiation influence patterns speciation. We investigate causal links between a dramatic faunal turnover two dominant geologic processes operating within Laurentia during Late Ordovician: Taconian Orogeny GICE related cooling. utilize novel approach for elucidating relationship biotic changes using time-stratigraphic,...
Abstract The profound global impact of marine radiations during the Great Ordovician Biodiversification Event (GOBE) is widely appreciated; however, diversification varied among paleocontinents and these individual trajectories are less understood. Here we present a new species-level diversity curve for rhynchonelliform brachiopods from midcontinental Laurentia based on bed-by-bed analysis Simpson Group Oklahoma (USA). Diversity abundance data span Dapingian through Sandbian Stages, which...
The set of environmental conditions under which a taxon can survive and maintain viable populations, known as the ecological niche, is fundamental determinant taxon's distribution. Because central importance niches, they have been assumed to remain relatively stable during intervals morphological stasis. However, assumption niche stability has rarely tested directly with fossil data spanning multiple temporal intervals. Thus, this likely be accurate are not well understood. In study, we use...
The integration of Geographic Information System (GIS) methodology within a phylogenetic and statistical framework provides background against which to evaluate the relationship between biogeographic changes evolution in fossil record. A case study based on patterns Middle Late Devonian phyllocarids (Crustacea) illustrates usefulness this integrated approach. Using combined approach enhances determination rates biodiversity change evolutionary changes. Because interaction speciation...
The Kirkpatrick Basalt (Jurassic) of South Victoria Land and the Central Transantarctic Mountains, Antarctica, includes sedimentary interbeds representing shallow lakes ephemeral ponds (some with microbial mat accumulations), deep permanent lakes, lake-margin areas, especially vegetated wetlands. Fossil assemblages in these are dominated by spinicaudatans (conchostracans), but ostracodes, insect nymphs, actinopterygian fish, plants locally abundant. Similar biotas contrasting contemporaneous...