Abstract:

Monthly mean nutrient and element concentrations in soil solution and monthly sum of litterfall from Q2.3. Soil solution was sampled from below the organic layer (lysimeter), 15cm and 30cm depth. Monthly means were calculated from weekly measurements. The measured nutrients and elements comprise: pH, PO4-P, Ptot, Cl, NH4-N, NO3-N, Ntot, DOC, Ca, K, Mg, Na.

Abstract:

Monthly mean nutrient and element concentrations in stem flow from Q2. The monthly values were calculated from weekly measurements. Stem flow was collected from 5 trees in Q2. A list of tree species and tree properties can be found in Fleischbein et al. (2005, Hydrological Processes).

Abstract:

Pressure heads [synon.: matrix potentials, or pore water pressions] measured daily at two depth within the mineral soil on the western ridge of microcatchment Q2 at 2000 m ASL. Pressure head values were measured by fixed tensiometers. Daily values were taken manually.

Abstract:

Weekly time series of water fluxes, pH, electrical conductivity and measured concentrations of Al, Cu, Mn, Zn, Cl, PO4-P, Total P, NH4-N, NO3-N, Total N, S, K, Na, Mg, Ca and Total organic C in stream water in the ECSF area in the microcatchment Q2. The weekly time series extends between March 1998 and December 2016. Stream water was sampled weekly upstream of the weir in Q2.1. Samples were immediately filtered (4-7 µm) in the laboratory of the ECSF and stored at -20 °C until transport in frozen state to Germany or to Switzerland for concentration measurements.

Abstract:

Monthly aggregated time series of litterfall in the ECSF area in the microcatchment Q2. Litterfall was sampled weekly on the 3 transects of Q2 (Q2.1, Q2.2, Q2.3) with 3 polyethylene mesh collectors (0.5 x 0.5 m) per transect. The samples were dried at 40 °C for one week and the mass of the dry litterfall was recorded. The masses of the 3 replicates at upper, middle and lower slope were averaged per transect and collecting interval and subsequently aggregated per month and transect.

Abstract:

Weekly time series of throughfall fluxes, electrical conductivity, pH values and measured concentrations of Al, Mn, Zn, Cl, PO4-P, Total P, NH4-N, NO3-N, Total N, S, K, Na, Mg, Ca and Total organic C in throughfall in the ECSF area in the microcatchment Q2 (transects Q2.1, Q2.2 and Q2.3). The weekly time series extends between March 1998 and December 2016. Throughfall was sampled with 20 Hellmann-type collectors per transect. Replicates were collected, volume-weighted and bulked to one sample per transect and collecting interval. Samples were immediately filtered (4-7 µm) in the laboratory of the ECSF and stored at -20 °C until transport in frozen state to Germany or to Switzerland for concentration measurements. Electrical conductivity and pH values were measured immediately in unfiltered aliquots in the laboratory of the ECSF.

Abstract:

Soil data sampled throughout Q2. Data set contain soil texture, bulk density, saturated hydraulic conductivity, stone content, pH, and C/N.

Abstract:

Weekly time series of measured electrical conductivity and pH values in stem flow in the microcatchment Q2 (transect Q2.1). The time series extends between March 1998 and December 2016. stem flow was sampled weekly in Q2.1 with polyurethane collars and collecting bukets on 5 representative tree species: Piptocoma discolor (Kunth) Pruski, Heliocarpus americanus L., Sapium glandulosum (L.) Morong, Cyathea caracasana (Klotzsch) Domin, Cecropia angustifolia Trécul. The five stem flow samples were collected, volume-weighted and bulked to one sample per per collecting interval. Electrical conductivity and pH values were measured immediately in unfiltered aliquots in the laboratory of the ECSF.

Abstract:

Abstract:

Weekly time series of measured electrical conductivity and pH values in stream water in the microcatchment Q2. The time series extends between March 1998 and December 2016. Stream water was sampled weekly upstream of the weir in Q2.1. Electrical conductivity and pH values were measured immediately in unfiltered aliquots in the laboratory of the ECSF.