Preprints

Filtering by Subject: Biochemistry

Seasonal dynamics of zooplankton nutrient recycling in a hypereutrophic reservoir

Tyler James Butts, Eric K Moody, Grace Marie Wilkinson

Published: 2022-02-17
Subjects: Biochemistry, Biology, Ecology and Evolutionary Biology, Life Sciences, Other Life Sciences

Consumer-driven nutrient cycling influences aquatic ecosystem functioning by altering energy flow as well as the movement and transformation of nutrients. In hypereutrophic lakes, zooplankton nutrient recycling has largely been considered negligible due to the high concentrations of available nutrients. A recent comparative analysis found that zooplankton community composition may influence [...]

Modeling the Responses of Dissolved Oxygen and Nitrate Concentrations due to Land Use and Land Cover Change Scenarios in a Large Subtropical Reservoir

Carolina Cerqueira Barbosa, Maria do Carmo Calijuri, Phelipe da Silva Anjinho, et al.

Published: 2021-09-15
Subjects: Biochemistry, Environmental Engineering, Terrestrial and Aquatic Ecology

Itupararanga reservoir is a large reservoir built in the Southeast of Brazil to support multiple uses, mainly hydropower generation and drinking water supply for almost 1 million people. We applied a process-based biogeochemical model and a distributed basin load model to assess the responses of dissolved oxygen and nitrate concentrations in the Itupararanga reservoir based on three land use and [...]

TIMS analysis of neodymium isotopes in human tooth enamel using 1013 Ω amplifiers

Esther Plomp, Isabella von Holstein, Janne Koornneef, et al.

Published: 2018-11-03
Subjects: Biochemistry, Biochemistry, Biophysics, and Structural Biology, Life Sciences

Human provenance studies employing isotope analysis are essential in archaeological and forensic sciences but current applications provide limited spatial resolution. This study reports on the potential of neodymium isotope composition (143Nd/144Nd) to improve human provenancing capabilities. Human tissues contain very low (<0.1 ppm) neodymium concentrations, such that previous composition [...]

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