Publications by authors named "L J Lees"
Highway reclamation (i.e., the removal of highways or placing existing highways underground to create mixed-use urban areas) is being implemented around the United States, often touting co-benefits for population health.
View Article and Find Full Text PDFSeasonal and El Niño-Southern Oscillation (ENSO) warming result in similar ocean changes as predicted with climate change. Climate-driven environmental cycles have strong impacts on microbiome diversity, but impacts on microbiome function are poorly understood. We quantified changes in microbial genomic diversity and functioning over 11 years covering seasonal and ENSO cycles at a coastal site in the southern California Current.
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- Nitrate levels are typically low in summer due to high macroalgal growth, while ammonium and urea, which are less studied, can be found at higher concentrations in regions like Southern California.
- A study measured nitrogen uptake rates in two kelp species, Macrocystis pyrifera and Eisenia arborea, across different locations to see how they utilize nitrate, ammonium, and urea during the summer months of 2021 and 2022.
- Results showed that both kelp species can efficiently absorb all three nitrogen forms, with M. pyrifera showing greater efficiency for nitrate and ammonium, while urea uptake improved as internal nitrogen levels in the kelp declined.
Research Question: What can three-dimensional cell contact networks tell us about the developmental potential of cleavage-stage human embryos?
Design: This pilot study was a retrospective analysis of two Embryoscope imaging datasets from two clinics. An artificial intelligence system was used to reconstruct the three-dimensional structure of embryos from 11-plane focal stacks. Networks of cell contacts were extracted from the resulting embryo three-dimensional models and each embryo's mean contacts per cell was computed.
Zinc (Zn) is a key micronutrient used by phytoplankton for carbon (C) acquisition, yet there have been few observations of its influence on natural oceanic phytoplankton populations. In this study, we observed Zn limitation of growth in the natural phytoplankton community of Terra Nova Bay, Antarctica, due to low (~220 μatm) pCO2 conditions, in addition to primary iron (Fe) limitation. Shipboard incubation experiments amended with Zn and Fe resulted in significantly higher chlorophyll a content and dissolved inorganic carbon drawdown compared to Fe addition alone.
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