Abstract:

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:

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 throughfall at NUMEX San Francisco. The fortnightly time series extends between August 2007 and December 2016. Throughfall was sampled on the 20 NUMEX plots with Hellmann-type collectors. On each plot 20 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:

Monthly time series of d13C and d15N isotope measurements in litterfall at NUMEX San Francisco between 2007 and 2009. 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 isotope measurements of d13C and d15N by EA/IRMS (ThermoFisher, Bremen, Germany)

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:

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.

Abstract:

Abstract:

Fortnightly time series of throughfall fluxes from NUMEX San Francisco. Throughfall was measured the 20 plots of NUMEX San Francisco with 20 Hellmann-type collectors on each plot. The fortnightly time series extends between August 2007 and December 2016.

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.