A5048564750- Diatoms and Algae Research
- Geology and Paleoclimatology Research
- Aquatic Ecosystems and Phytoplankton Dynamics
- Cryospheric studies and observations
- Microbial Community Ecology and Physiology
- Marine and environmental studies
- Evolution and Paleontology Studies
- Aeolian processes and effects
- Ecology and Vegetation Dynamics Studies
- Botany, Ecology, and Taxonomy Studies
- Aquatic Invertebrate Ecology and Behavior
- Soil and Water Nutrient Dynamics
- Fire effects on ecosystems
- Geological Studies and Exploration
- Genomics and Phylogenetic Studies
- Marine and coastal ecosystems
- Fish biology, ecology, and behavior
- Water Quality and Resources Studies
- Pleistocene-Era Hominins and Archaeology
- Mediterranean and Iberian flora and fauna
- Biocrusts and Microbial Ecology
- Aquatic Ecosystems and Biodiversity
- Rangeland and Wildlife Management
Science Museum of Minnesota
2025
University of California, Irvine
2024-2025
University of Maine
2018-2023
Indiana State University
2016-2018
Abstract Diatom fossils offer reliable means of evaluating biotic, climatic, and ecological conditions past environments. Here we present new insights in reconstructing the mid-Miocene paleoenvironment Ashfall Fossil Beds Nebraska, USA. Extensive excavation megafauna flora at site has provided a well-preserved glimpse into Clarendonian Land Mammal age North American Plains. From sedimentary evidence environment been described as small waterhole seasonally wet depression located stream bed....
Abstract Several hypotheses posit a link between the origin of Homo and climatic environmental shifts 3 2.5 Ma. Here we report on new results that shed light interplay tectonics, basin migration faunal change one hand fate Australopithecus afarensis evolution other. Fieldwork at Mille-Logya site in Afar, Ethiopia, dated to 2.914 2.443 Ma, provides geological evidence for northeast Hadar Basin, extending record this lacustrine Mille-Logya. We have identified three fossiliferous units,...
Introduction Accurate models of lake primary production are crucial for understanding ecosystem function and predicting responses to global change. However, current research in modeling has emphasized environmental characteristics while less work considered phytoplankton stoichiometric traits. Importantly, these traits link resource availability via organismal metabolism thus critical function. Methods Here, we use an existing database demonstrate that minimum quotas nitrogen phosphorus...
A new species of Bacillariophyta (diatom) is described from Gokyo Cho, a lake near Mount Everest in the Himalayan Mountain Range. Water and algal samples were collected during an expedition to Sagarmatha National Park (SNP), Nepal May 2016. Samples this reveal Lindavia, herein with ecological information provided. The Lindavia has three triangular undulations depressions central area. This likeness Pantocsekiella ocellata sensu lato group. It differs group undulation shape ultrastructure...
Abstract. Knowledge of microparticle geometry is essential for accurate calculation ice core volume-related dust metrics (mass, flux, and particle size distributions) subsequent paleoclimate interpretations, yet shape data remain sparse in Antarctica. Here we present 41 discrete measurements, volume calculations, calibrated continuous time series spanning 50–16 ka from the South Pole Ice Core (SPC14) to assess characteristics variability. We used FlowCAM, a dynamic imaging instrument,...
Three novel species of Bacillariophyta (diatom) are described from the sediments Paleolake Lorenyang, a large lake that existed in Turkana Basin, Kenya during Gelasian age Pleistocene Epoch. Sediment cores extracted as part Hominin Sites and Paleolakes Drilling Project (HSPDP) were sampled to provide diatom-based paleoecological record Lorenyang. Preliminary results analysis unearthed three diatoms belonging Surirella Thalassiosira Natoo Member Nachukui Formation. Comparisons Lorenyang made...
Paleolake Hadar was an expansive lake in the lower Awash Valley of Ethiopia’s Afar Depression that existed periodically through Late Pliocene. The sedimentary deposits from this ancient (Hadar Formation) have broad importance because a significant number hominin fossils been recovered formation. Samples Formation lacustrine sequence were collected sediment cores extracted as part Hominin Sites and Paleolakes Drilling Project (HSPDP). A paleoecological study HSPDP Northern material has...
Highlight: Fourteen years (1956 to 1970) of chemical control for rubber and green rabbitbrush using the ester forms 2,4-D produced consisrenr conrrol, ranging from 85 fo 98% on rabbitbrush.The nmounf new twiggrowrh, soil moisture, rate methods application, total seasonal rwig growth, subsequent drought conditions proved criticnl effective kills.Selective kills were achieved by manipulation these factors.Site potential response IO changes that result nnur be recognized."Dminage Effect" is LI...
Abstract We develop a new method that allows for more accurate biovolume calculations of microorganisms. This also the volume individual skeletal features microorganisms to be analyzed separately so estimates resource cost per evolutionary adaptations may assessed. provide means link community changes alterations in nutrient cycles, ecosystem function, and rock‐forming processes by plankton. integrates computer‐aided design software from engineering architecture into biological applications....
Abstract. Knowledge of microparticle geometry is essential for accurate calculation ice core volume-related dust metrics (mass, flux, and particle size distributions) subsequent paleoclimate interpretations, yet shape data remain sparse in Antarctica. Here we present 41 discrete measurements, volume calculations, calibrated continuous timeseries spanning 50 – 10 ka from the South Pole Ice Core (SPC14) to assess characteristics variability. We used FlowCAM, a dynamic imaging instrument,...