Abstract:

Automatic observation of cloud cover by the infrared scanning Nubiscope instrument mounted on the rooftop of the ECSF station building. The geographic coverage is given by the visible sky from the installation point and roughly matches the San Francisco river catchment basin.
For technical details and capabilities of the instrument please refer to nubiscope.eu and www.knmi.nl/~wauben/Sensor/TECO2010_1(8)_Waubenetal.pdf

Abstract:

The dataset includes physical properties of the mineral soils on forest and pasture core plots in San Francisco during the sampling campaigns in 2018 and 2019. Three soil profiles were established on each core plot. Respresentative samples were taken from each horizon, dried and transported to Germany for laboratory analyses. Bulk density was measured in the topsoil with undisturbed soil cores. Soil texture was measured with a combined sieving and pipetting method after oxidation of organic matter and chemical dispersion of aggregates.

Abstract:

Monthly time series of measured concentrations of Al, Cu, Fe, Mn, Zn, C, N, S, P, K, Na, Mg, Ca in litterfall at NUMEX San Francisco between 2007 and 2013. Litterfall was collected on all 20 plots at NUMEX on 6 subplots per plot (A-F) with polyethylene mesh traps (0.6 x 0.6 m). On each plot, two of the six litterfall traps were randomly sampled monthly. The samples were dried at 40 °C for one week and stored at the ECSF until transport to Germany or Switzerland for chemical analyses. The two collected replicates were bulked per plot and collecting interval resulting in one litterfall sample per plot and month. Samples were ground to <50 µm with a planetary ball mill (Retsch PM200, Haan, Germany) prior to elemental analysis of C, N, and S by thermal combustion (Elementar Analysensysteme, Hanau, Germany) and acid microwave digestion with concentrated HNO3. Element concentrations in the digested samples were measured by AAS, ICP-OES or ICP-MS.

Abstract:

Fortnightly time series of measured electrical conductivity and pH values in litter leachate at NUMEX San Francisco. The fortnightly time series extends between August 2007 and December 2016. Litter leachate was sampled on the 20 NUMEX plots with zero-tension lysimeters below the organic layer. On each plot 3 replicates were collected, volume-weighted and bulked to one sample per plot. Electrical conductivity and pH values were measured immediately in unfiltered aliquots in the laboratory of the ECSF.

Abstract:

Fortnightly time series of measured concentrations of Cl, PO4-P, Total P, NH4-N, NO3-N, Total N, K, Na, Mg, Ca and Total organic C in soil solution (30 cm mineral soil depth) at NUMEX San Francisco. The fortnightly time series extends between August 2007 and March 2013. Soil solution was sampled on the 20 NUMEX plots with ceramic suction cups having a pore size of 1 µm installed at 30 cm depth in the mineral soil. On each plot 3 replicates were collected and bulked to one sample per plot. The samples were stored at -20 °C until transport in frozen state to Germany or to Switzerland for concentration measurements.

Abstract:

Tree species inventory of the three San Francisco Respect plots. All individual stems are listed with their identity and dbh (first inventory in 2018).

Abstract:

Abstract:

Monthly measurement of soil temperature and soil gas fluxes (CO2, N2O) in the NUMEX plots in Bombuscaro, ECSF und Cajanuma

Abstract:

Analyses if morphological and physiological attributes of seedlings from the two most common species in NUMEX experiment at the three elevations. Changes in this attributes are altered by nutrient availability in this case fertilization might showed specific limitation for N or P.

Abstract:

Bird species (elevational gradient: 1800-2530m) occurrence and abundance has been collected by a trained observer in 30 forest sites in the study area under favorable weather conditions at 6:00–10:00 and 16:00–18:00 (UTC ?5:00) between 2000 and 2002 (Paulsch and Müller-Hohenstein, 2008). Standardized point counts (30 min) were repeated 12 times per site and combined with mist-netting data to comprehensively assess the bird assemblages.