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Platform data

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Position of trees in the natural forest experiment was calculated using trigonometric measurements from 2004 and 2009. Precision is estimated to be between 0-10m.

Monthly mean nutrient and element concentrations in soil solution and monthly sum of litterfall from Q2.2. 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.

Weekly time series of 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 soil solution (at 15 cm mineral soil depth) in the ECSF area in the microcatchment Q2 (transects Q2.1, Q2.2 and Q2.3). The weekly time series extends between May 2000 and May 2013. Soil solution was sampled on the 3 transects of Q2 with ceramic suction cups having a pore size of 1 µm installed at 15 cm depth in the mineral soil. On each transect 3 replicates were collected and bulked to one sample per plot and collection interval. Samples were immediately stored at -20 °C until transport in frozen state to Germany or to Switzerland for concentration measurements.

Weekly time series of 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 May 2013. 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.

Weekly time series of measured electrical conductivity and pH values in soil solution (at 30 cm mineral soil depth) in the microcatchment Q2 (transects Q2.1, Q2.2 and Q2.3). The time series extends between May 2000 and December 2016. Soil solution was sampled on the 3 transects of Q2 with ceramic suction cups having a pore size of 1 µm installed at 30 cm depth in the mineral soil. On each transect 3 replicates were collected and bulked to one sample per plot and collection interval. Electrical conductivity and pH values were measured immediately in unfiltered aliquots in the laboratory of the ECSF.

Monthly mean nutrient and element concentrations in soil solution and monthly sum of litterfall from Q2.1. 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.

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.

Monthly aggregated time series of measured concentrations of Al, Cu, Fe, Mn, Zn, C, N, S, P, K, Na, Mg, Ca in 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 stored at the ECSF until transport to Germany or Switzerland for chemical analyses. The replicates at upper, middle and lower slope were bulked per transect and collecting interval and the results were subsequently aggregated per month and transect. 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.

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.

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).

Information about the natural forest management experiment can be found in:

Günter, S.; Cabrera, O.; Weber, M.; Stimm, B.; Zimmermann, M.; Fiedler, K.; Knuth, J.; Boy, J.; Wilcke, W.; Iost, S.; Makeschin, F.; Werner, F.; Gradstein, R. & Mosandl, R. Beck, E.; Bendix, J.; Kottke, I. & Mosandl, R. (Eds.) Natural Forest Management in Neotropical Mountain Rain Forests -- An Ecological Experiment, Chapter 26 in "Gradients in a Tropical Mountain Ecosystem of Ecuador", Springer-Verlag Berlin Heidelberg, Germany, 2008, 198, 363-375

Weekly time series of measured electrical conductivity and pH values in soil solution (at 15 cm mineral soil depth) in the microcatchment Q2 (transects Q2.1, Q2.2 and Q2.3). The time series extends between May 2000 and December 2016. Soil solution was sampled on the 3 transects of Q2 with ceramic suction cups having a pore size of 1 µm installed at 15 cm depth in the mineral soil. On each transect 3 replicates were collected and bulked to one sample per plot and collection interval. Electrical conductivity and pH values were measured immediately in unfiltered aliquots in the laboratory of the ECSF.

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.

Weekly time series of 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 May 2013. 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.

FOR420-Metainformation: 

"8 Transekten mit 17-43 Aufnahmeeinheiten zu je 20 Meter Länge (200m² für BHD>25 cm, 100m² für BHD 5-25cm wurden alle Bäume mit den Parametern Art, BHD, astfreie Schaftlänge sowie Qualitätsmerkmalen aufgenommen (EZG Q2)."

Original data: FOR402 (Phase 2) ID: 51006, 51001; Creator: Günter, Sven (AG: C4-C4, AG Mosandl)

This dataset has been migrated from the previous FOR402-Database to the FOR816-Database by the Central Data Management Z1/FOR816.
Please keep in mind that the migration included all avilable metainfomation which were accessible through the FOR402-Database. Nevertheless, it can't be guaranteed that no thematic misinterpretation occured in the data/attribute description.
There has been no further disciplin specfic control. In any case of ambiguity please contact the dataset creator.

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 stem flow in the ECSF area in the microcatchment Q2. The weekly time series extends between March 1998 and December 2016. Stem flow was sampled weekly in Q2.1 with polyurethane collars 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. 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.

Weekly time series of throughfall data from the ECSF area in the microcatchment Q2 (transects Q2.1, Q2.2 and Q2.3). Throughfall was measured weekly with 20 Hellmann-type pluviometers at each transect. The weekly replicates were volume-weighted and bulked to one sample per collecting interval and transect. Electrical conductivity and pH values were measured immediately in unfiltered aliquots in the laboratory at the ECSF.

Weekly time series of 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 stem flow in the ECSF area in the microcatchment Q2 (transect Q2.1). The weekly time series extends between March 1998 and May 2013. Stem flow was sampled weekly in Q2.1 with polyurethane collars 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. 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.

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.

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