Water chemistry data for studies of the biodegradability of dissolved organic matter in peatland catchments at the Marcell Experimental Forest: 2009-2011: 2nd edition

This data publication includes water chemistry data for samples from the S2 and S6 research catchments at the Marcell Experimental Forest (MEF) in Balsam Township, Itasca County, Minnesota. Data include weekly or more frequent samples of stream water collected from 2009 to 2011. Measurements were taken in upland runoff waters (both overland flow and subsurvey stormflow), which were collected on an event-basis. Both synoptic samples of lagg waters were collected as well as weekly lagg samples from two sites. During 2011, some water samples were collected in the S2 bog. A few additional samples were taken in 2012, 2015, and 2016 to allow a comparison of two different TOC measurement methods and those data are also included. Concentrations of total organic carbon (TOC), total nitrogen (TN), and pH were measured on unfiltered water samples at the Forestry Sciences Laboratory of the Northern Research Station in Grand Rapids, Minnesota. Some of the water samples were analyzed at the Cotner aquatic ecology lab at the University of Minnesota (St. Paul) for dissolved organic carbon (DOC) concentration, bacterial respiration rate, and biodegradable DOC (BDOC) concentration. Natural-abundance water isotopes were also measured for a subset of the samples.
These data were collected for a study of dissolved organic matter (DOM) biodegradability during and after spring snowmelt events.
This data publication is a second edition that was made available on 10/07/2020. This newer edition includes the addition of water isotope data. At the same time it was recognized that some data that were never intended to be included in this data publication were included the first edition of these data. Those values (LAB IDs between 311000 to 311319) were removed from this package, but in totality, with additional solutes, will soon be released through another data publication.