Hohes Holz (DE-HoH) daily averages of spatially distributed soil moisture measurements

Hohes Holz (DE-HoH) daily aggregates of spatially distributed soil moisture

Soil water content sensors from a distributed monitoring network (SoilNet-WSN with SPADE sensors, sceme.de GmbH, Germany, Bogena et al., 2010) were originally installed in the frame of a trenching experiment (Marañón-Jiménez et al., 2021) in April 2014 and distributed within a fenced research area considering patches with low and high tree (and thus root) density (21 nodes) for 15 locations. The six sensors of a node were installed in vertical profiles ranging from 0.1 m to 0.6 m depth. Additionally, sensors of six more nodes were distributed in the shallow layer between 10 cm and 30 cm to cover the higher soil moisture dynamics of this soil layer. Of the total setup described in Marañón-Jiménez et al. (2021), only sensors without soil treatment were used for our analysis.

Soil moisture data from the distributed wireless network were acquired every 10 min via a network coordinator and stored on a field computer. In addition soil moisture was also measured with CS616 sensors (Campbell Scientific Inc., Logan, Utah, USA) in two additional profiles. Those data were also acquired and stored as 10 min averages by a CR1000 data logger (Campbell Scientific Inc., Logan, Utah, USA). Physically unrealistic data were removed by semi-automated procedures that check for limit exceedances (values below 0 or above local average porosity) and spikes unrelated to precipitation. Daily averages were calculated per sensor if more than 20 % of data per day was available. Sensors were only considered if at least 30 measurement days were available to avoid low statistic power. In total, the data used here consists of measurements from 30 sensors in 10cm, 15 sensors in 20cm, 24 sensors in 30cm, 16 sensors in 40cm and 16 sensors in 50cm. The 60cm layer was ignored due to very low data availability.

Bogena, H., Herbst, M., Huisman, J., Rosenbaum, U., Weuthen, A., & Vereecken, H. (2010). Potential of Wireless Sensor Networks for Measuring Soil Water Content Variability. Vadose Zone Journal, 9 (4), 1002–1013. doi: 10.2136/vzj2009.0173

Marañón-Jiménez, S., Radujković, D., Verbruggen, E., Grau, O., Cuntz, M., Peñuelas, J., ... Rebmann, C. (2021, July).
Shifts in the Abundances of Saprotrophic and Ectomycorrhizal Fungi With Altered Leaf Litter Inputs. Frontiers in Plant Science, 12 , 682142. doi: 10.3389/fpls.2021.682142