A5019649831- Isotope Analysis in Ecology
- Geology and Paleoclimatology Research
- Archaeology and ancient environmental studies
- Marine Bivalve and Aquaculture Studies
- Maritime and Coastal Archaeology
- Marine and fisheries research
- Marine Biology and Ecology Research
- Pacific and Southeast Asian Studies
- Marine animal studies overview
- Pleistocene-Era Hominins and Archaeology
- Cephalopods and Marine Biology
- Marine and coastal plant biology
- Aquatic Invertebrate Ecology and Behavior
- Coral and Marine Ecosystems Studies
- Indigenous Studies and Ecology
- Radioactive contamination and transfer
- Fish Ecology and Management Studies
- Paleontology and Stratigraphy of Fossils
- Environmental and Cultural Studies in Latin America and Beyond
- Calcium Carbonate Crystallization and Inhibition
- Bone and Dental Protein Studies
- Sensory Analysis and Statistical Methods
- Indigenous Cultures and History
- Handwritten Text Recognition Techniques
- Forensic Anthropology and Bioarchaeology Studies
University of Alabama
2016-2025
Geological Survey of Alabama
2016-2025
Smithsonian Institution
2020
Four Directions Development Corporation
2020
University of Georgia
2000-2005
University of Maine
2004
Savannah River National Laboratory
2003
Peruvian sea catfish ( Galeichthys peruvianus ) sagittal otoliths preserve a record of modern and mid-Holocene surface temperatures (SSTs). Oxygen isotope profiles in excavated from Ostra [6010 ± 90 years before the present (yr B.P.); 8°55′S] indicate that summer SSTs were ∼3°C warmer than those present. Siches (6450 110 yr B.P.; 4°40′S) recorded mean annual ∼3° to 4°C measured under conditions. Trophic level population diversity equitability data these faunal assemblages other...
Two of the most salient anthropological questions regarding southeastern shell ring sites are related to season(s) that they were occupied and whether or not deposits represent monumental constructions and/or feasting remains. This paper addresses these through analysis growth band clams (Mercenaria spp.) (N = 620) stable oxygen isotope ratios clam oyster shells (Crassostrea virginica) 58) at Sapelo Island Shell Ring complex located on Georgia coast, USA. The season death samples' position...
Archaeological evidence plays a key role in longitudinal studies of humans and climate. Climate proxy data from Peruvian archaeological sites provide case study through insight into the history "flavors" or varieties El Niño (EN) events after ∼11 ka: eastern Pacific EN, La Niña, coastal EN (COA), central Modoki (CP). proxies are important to because more commonly used paleoclimate unavailable equivocal. Previously, multiproxy coast elsewhere suggested that frequency varied over Holocene: 1)...
Abstract Crassostrea virginica is one of the most common estuarine bivalves in United States’ east coast and frequently found archaeological sites sub-fossil deposits. Although there have been several sclerochronological studies on stable carbon oxygen isotopes shells this species, less known about δ 15 N values within their shells, which could be a useful paleoenvironmental proxy to assess nitrogen dynamics. Modern C. samples were collected Chesapeake Bay for comparison with from nearby...
Horizon scanning is an increasingly common strategy to identify key research needs and frame future agendas in science. Here, we present the results of first such exercise for field sclerochronology, thereby providing overview persistent emergent questions that should be addressed by studies. Through online correspondence following 5th International Sclerochronology Conference 2019, participants submitted rated either knowledge gaps or promising applications sclerochronology. An initial list...
Circular shell rings along the South Atlantic Coast of North America are remnants some earliest villages that emerged during Late Archaic (5000–3000 BP). Many these villages, however, were abandoned Terminal (ca 3800–3000 We combine Bayesian chronological modeling with mollusk geochemistry and oyster paleobiology to understand nature timing environmental change associated emergence abandonment circular ring on Sapelo Island, Georgia. Our models indicate Native Americans occupied three at...
Understanding the influence of natural climatic variability on modern fisheries is complicated by over a century industrial fishing. Archaeological data provide unique opportunities for assessing precolonial and preindustrial fisheries. Records show that anchoveta-vs sardine-dominated correlate with 20th-century climate change in Pacific Basin are linked to multidecadal variability. The “anchovy regime” characterized cooler conditions lower frequency El Niño/Southern Oscillation (ENSO)...
Marine upwelling along coastal Peru can be intense and variable, making radiocarbon dating marine systems complex. Historical proxy records of are few, long-lived species such as corals do not grow in the cold waters. Mollusk shell carbonate, however, record both magnitude local reservoir correction, ΔR, seasonal oscillations ventilation age If large, these would complicate organisms. To examine this possibility, we sampled for δ 13 C, 18 O, 14 C content a set pre-bomb Argopecten purpuratus...
Marine macroinvertebrates are ideal sentinel organisms to monitor rapid environmental changes associated with climatic phenomena. These build up protective exoskeletons incrementally by biologically-controlled mineralization, which is deeply rooted in long-term evolutionary processes. Recent studies relating potential fluctuations climate change, such as ocean acidification, suggest modifications on carbonate biominerals of marine invertebrates. However, the influence known, and recurrent,...
Mollusk shells provide brief (<5 yr per shell) records of past marine conditions, including radiocarbon reservoir age ( R ) and upwelling. We report 21 14 C ages calculations on small (∼2 mg) samples from 2 Mesodesma donacium (surf clam) shells. These were excavated a semi-subterranean house floor stratum dated to 7625 ± 35 BP at site QJ-280, Quebrada Jaguay, southern Peru. The ranges in (and thus the are 530 170 yr; individual aragonite spans 130 60 730 yr. This intrashell variability...
Research at Crystal River and Roberts Island Shell Mound Complex, on the western coast of Florida, USA, offers a quantitative assessment temporality shell deposit construction, Native subsistence practices, mobility patterns through stable oxygen isotope data from eastern oyster (C. virginica). The δ18Owater values oysters vary synchronously with salinity, assuming relatively constant δ18Owater/salinity gradients since time occupation, allowing for an examination shifts in habitat...
ABSTRACT In this article, we present the results of sequential oxygen isotope analysis performed on hard clam, Mercenaria spp. (n = 5) and eastern oyster, Crassostrea virginica 13) valves excavated from Pumpkin Hammock (9MC350). These data are used to evaluate Guale models settlement subsistence along Georgia coast during late pre-Contact early Colonial eras (ca. AD 1325 1700). Season collection indicate shells were collected deposited island all four seasons, suggesting year-round...
Research Article| May 01, 2013 Marine radiocarbon reservoir age variation in Donax obesulus shells from northern Peru: Late Holocene evidence for extended El Niño Miguel F. Etayo-Cadavid; Etayo-Cadavid 1Department of Geological Sciences, University Alabama, Tuscaloosa, Alabama 35487, USA *Current address: BP America Inc., Houston, Texas 77079, USA; E-mail: Miguel.Etayo@bp.com. Search other works by this author on: GSW Google Scholar C. Fred T. Andrus; Andrus † †E-mails: fandrus@as.ua.edu;...