Dataset: pH from microsensor profiles of ex situ sediment cores collected in the Chesapeake Bay and measured during 2017-2018

Final no updates expectedDOI: 10.26008/1912/bco-dmo.847923.1Version 1 (2021-04-07)Dataset Type:Other Field Results

Principal Investigator: Sairah Malkin (University of Maryland Center for Environmental Science)

BCO-DMO Data Manager: Shannon Rauch (Woods Hole Oceanographic Institution)


Project: Collaborative Research: Probing the Metabolic and Electrical Interactions of Cable Bacteria in Anoxic Sediments (Anoxic Sediment Bacteria Interactions)


Abstract

This dataset includes pH from microsensor profiles of ex situ sediment cores collected in the Chesapeake Bay and measured during 2017-2018.

Methodology:
High-resolution microsensor profiling of O₂, pH, and H₂S was performed on replicate sediment cores retrieved from the sampling sites, with 1 or 2 replicate profiles made per sediment core per analyte, using commercial microsensors operated with a motorized micromanipulator (Unisense A.S., Denmark). pH sensors were calibrated with a 3-point NBS buffer calibration. Detailed methodology is given in Malkin et al., 2014.

Sampling and Analytical Procedures:
Replicate sediment cores were collected using a gravity corer (Uwitec; clear PVC liners, Ø = 8.6 cm), capped, kept in the dark at bottom water temperature in a water bath, and transported back to the laboratory, where they were held in a climate-controlled room. Microsensor profiling was conducted within 1 day of core retrieval.

Instruments:
Unisense A.S. microsensors (Denmark) and motorized micromanipulator system were used for data collection. The 4 channel microsensor multimeter was used, with the following microsensors: Ox-50, pH-200, and H2S-100. Each sensor was used consecutively and so resultant data is provided separately as individual datasets. SensorTrace Suite software was used for data collection.


Related Datasets

IsRelatedTo

Dataset: Microsensor profiles - H2S
Malkin, S. (2021) H2S from microsensor profiles of ex situ sediment cores collected in the Chesapeake Bay and measured during 2017-2018. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2021-04-07 doi:10.26008/1912/bco-dmo.847949.1
IsRelatedTo

Dataset: Microsensor profiles - O2Sat
Malkin, S. (2021) O2 saturation from microsensor profiles of ex situ sediment cores collected in the Chesapeake Bay and measured during 2017-2018. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2021-04-06 doi:10.26008/1912/bco-dmo.847846.1

Related Publications

Methods

Malkin, S. Y., Rao, A. M., Seitaj, D., Vasquez-Cardenas, D., Zetsche, E.-M., Hidalgo-Martinez, S., … Meysman, F. J. (2014). Natural occurrence of microbial sulphur oxidation by long-range electron transport in the seafloor. The ISME Journal, 8(9), 1843–1854. doi:10.1038/ismej.2014.41