A5068313351- Diatoms and Algae Research
- Marine and coastal ecosystems
- Freshwater macroinvertebrate diversity and ecology
- Aquatic Ecosystems and Phytoplankton Dynamics
- Aquatic Invertebrate Ecology and Behavior
- Microbial Community Ecology and Physiology
- Invertebrate Taxonomy and Ecology
- Protist diversity and phylogeny
- Marine Biology and Ecology Research
- Geology and Paleoclimatology Research
- Physiological and biochemical adaptations
- Soil and Water Nutrient Dynamics
- Isotope Analysis in Ecology
- Paleontology and Stratigraphy of Fossils
- Research Data Management Practices
- Ocean Acidification Effects and Responses
- Species Distribution and Climate Change
University of Rhode Island
2020-2025
Southwest Biological Science Center
2024-2025
United States Geological Survey
2024-2025
Institute of Arctic and Alpine Research
2015-2019
University of Colorado Boulder
2015-2017
Consistent identification of diatoms is a prerequisite for studying their ecology, biogeography, and successful application as environmental indicators. However, taxonomic consistency among observers has been difficult to achieve, because information scattered across numerous literature sources, presenting challenges the diatomist. First, often inaccessible cost, or its location in journals that are not widely circulated. Second, revisions taking place faster than floras can be updated....
Despite the potential of standing genetic variation to rescue communities and shape future adaptation climate change, high levels uncertainty are associated with intraspecific trait in marine phytoplankton. Recent model intercomparisons have pointed an urgent need reduce projected responses ecosystems including Southern Ocean (SO) surface waters, which among most rapidly warming habitats on Earth. Because SO phytoplankton growth sea temperature (SST) poorly constrained, we developed a...
Abstract The nitrogen isotopic composition of diatom frustule‐bound organic matter (δ 15 N DB ) is often used to study changes in high latitude biological pump efficiency across glacial‐interglacial cycles, but the proxy may be biased by species‐specific effects. genus Chaetoceros particular interest because its abundance throughout ocean basins, shifting biogeography during glacial periods, and ability many species form heavily silicified resting spores. Here we investigate how spores (CRS)...
This flora is intended to serve as an image voucher for samples analyzed the U.S. Geological Survey Southeast Stream Quality Assessment (SESQA). The SESQA study included measurement of watershed and water quality parameters determine factors that have greatest potential alter biotic condition. Algal were collected at 108 sites in 2014, from streams representing gradients chemical physical alteration across southeast region. More than 375 taxa identified during analysis species composition...
Abstract Inconsistency in taxonomic identification and analyst bias impede the effective use of diatom data regional national stream lake surveys. In this study, we evaluated effect existing protocols a revised protocol on precision species counts. The adjusts four elements sample preparation, taxon enumeration, quality control (QC). We used six independent sets to assess adjustments analytical outcomes. first set was produced by three laboratories with total five analysts following...
Didymosphenia geminata has received a great deal of attention in the last 25 years, and considerable effort gone into determining origin, ecological impact, economic consequences its invasive behavior. While environmental conditions are controlling influence distribution, extreme success species may be tied to basic biology life history. Little is known, however, about population dynamics, size restoration reproduction D. geminata. The objective this study was determine temporal patterns...
Here we describe a new freshwater diatom species from the Cascade Mountain Range in Washington State, including observations of living cells and chloroplast structure. The represents fourth known extant within genus, as most Tetracyclus Ralfs are extinct. can be distinguished other Diatoma mesodon Kützing by its lanceolate-elliptical shape, apiculate ends, small size, rimoportula placement, distinct septa pattern. distribution taxon is currently catchments Mt. Baker-Snoqualmie National...
While describing the species Tetracyclus hinziae I. Bishop & Spaulding (2015, p. 200), it was noticed that basionym and type specimens of similar rupestre unclear. This short note addresses those concerns.
<strong class="journal-contentHeaderColor">Abstract.</strong> The nitrogen isotopic composition of diatom frustule-bound organic matter (δ<sup>15</sup>N<sub>DB</sub>) is often used to study changes in high latitude biological pump efficiency across glacial-interglacial cycles, but the proxy may be biased by species-specific effects. genus <em>Chaetoceros</em> particular interest because its abundance throughout ocean basins, shifting biogeography during glacial periods, and many...