A5047409302- Geology and Paleoclimatology Research
- Pleistocene-Era Hominins and Archaeology
- Archaeology and ancient environmental studies
- Isotope Analysis in Ecology
- Fire effects on ecosystems
- Ecology and Vegetation Dynamics Studies
- Evolution and Paleontology Studies
- Biocrusts and Microbial Ecology
- Atmospheric and Environmental Gas Dynamics
- Soil Geostatistics and Mapping
- Lichen and fungal ecology
- Amazonian Archaeology and Ethnohistory
- Geochemistry and Elemental Analysis
- Pacific and Southeast Asian Studies
- Forest Ecology and Biodiversity Studies
- Paleopathology and ancient diseases
- Groundwater and Isotope Geochemistry
- Botany, Ecology, and Taxonomy Studies
- Archaeology and Natural History
- Geochemistry and Geologic Mapping
- Atmospheric chemistry and aerosols
- Hydrology and Sediment Transport Processes
- Microbial Community Ecology and Physiology
- Colonialism, slavery, and trade
- Soil erosion and sediment transport
Archaeology Southwest
2024
Brown University
2020-2023
University of Wisconsin–Madison
2019-2023
Arkansas Tech University
2019-2020
Texas A&M University
2016-2018
Page-Ladson, Florida, provides evidence of the oldest human occupation in North American Gulf Coastal Plain at 14,550 B.P.
A widespread platinum (Pt) anomaly was recently documented in Greenland ice and 11 North American sedimentary sequences at the onset of Younger Dryas (YD) event (~12,800 cal yr BP), consistent with YD Impact Hypothesis. We report high-resolution analyses a 1-meter section lake core from White Pond, South Carolina, USA. After developing Bayesian age-depth model that brackets late Pleistocene through early Holocene, we analyzed quantified following: (1) Pt palladium (Pd) abundance, (2)...
Abstract Spores from coprophilous fungi are some of the most widely used non-pollen palynomorphs. Over last decades, these spores have become increasingly important as a proxy to study Pleistocene and Holocene megafauna. Although number types in palaeoecology is relatively small, there wide range fungal taxa whose utility palaeoenvironmental reconstruction remains under-researched. However, environmental taphonomic factors influencing preservation recovery still poorly understood....
The abundance of coprophilous (dung-inhabiting) fungal spores (CFS) in sedimentary records is an increasingly popular proxy for past megaherbivore that used to study megaherbivore-vegetation interactions, timing population declines and extinctions, the introduction domesticated herbivores. This method often relies on counting CFS alongside pollen tracers known concentration such as exotic or synthetic microspherules. Prior work has encouraged reporting abundances accumulation rates...
The Page-Ladson site, currently buried and submerged in a sinkhole northwestern Florida, demonstrates evidence of human occupation North America by 14,550 calendar years ago (cal yr BP). This paper combines new diatom with existing palynological data to strengthen paleoenvironmental interpretations at the site. was not entirely between ∼15,100 14,400 cal BP. Conditions site became warmer wetter, turbid pond from ∼14,400 12,900 From ∼12,900 BP until ∼11,000 BP, disappearance diatoms coring...
Debris in archaeological pollen samples can obscure grains during microscopic analysis. When attempting to remove debris smaller than 10 microns from a sample, screen openings be too small, requiring the sample agitated order facilitate its passing through screen. We recently developed new method that uses Branson© S450 sonicating disruptor horn agitate keeping free debris. Using this method, we have been successful ridding of microns. This paper presents results an investigation potential...
Multiproxy data collected from the largest inland wetland in Belize, Central America, demonstrate presence of large-scale pre-Columbian fish-trapping facilities built by Late Archaic hunter-gatherer-fishers, which continued to be used their Maya descendants during Formative times (approximately 2000 BCE 200 CE). This is earliest facility recorded ancient Mesoamerica. We suggest that such landscape-scale intensification may have been a response long-term climate disturbance between 2200 and...
Ecosystems across the world are experiencing seemingly unprecedented fire activity due to changes in land use and climate. However, disentangling drivers of regime intensification is difficult when climate occur simultaneously. Thus, multi-proxy paleoecological records with evidence for climate, vegetation composition, can provide valuable frameworks which interpret modern environmental shifts. Lake Tulane, Florida, offers an iconic record responses Heinrich Events other variations over last...