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Platform data

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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.

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.

The dataset includes physical and chemical properties of the organic layer and mineral soil at NUMEX San Francisco during sampling campaigns from 2007 to 2009. Following properties were measured: bulk density, horizon thickness, sand, silt and clay content, concentrations of Al, Fe, Mn, Zn, C, N, S, P, K, Na, Mg, Ca, cation exchange capacity, exchangeable cations Ca, Na, Mg, K, Al, Fe, delta 13C and delta 15N values. For details on used methods please see Wullaert, H. (2010): Response of nutrient cycles of an old-growth montane forest in Ecuador to experimental low-level nutrient amendments Johannes Gutenberg University Mainz, phd thesis (FOR816dw ID 885): http://www.tropicalmountainforest.org/publications.do?citid=885

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).

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.

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.

Herbivory estimated as leaf area loss [cm^2] and [%] and leaf traits were generated from sun-exposed leaves of 380 tree canopies belonging to 51 tree species (7 +/- 1 tree individual per species) located within the nine 1 ha forest core plots at 1000 m (Bombuscaro), 2000 m (San Francisco), and 3000 m (Cajanuma) in the Podocarpus Nationalpark and the Reserva Biológica San Francisco in southern Ecuador between February and March in 2019.
To estimate herbivory, 20 +/- 5 leaves per tree were scanned and analyzed with the software WinFOLIA. Leaf traits were either measured conventionally with morphometrical and chemical measurement techniques or spectrally with an OceanOptics spectrometer HDX to identify the reflectance wavebands of certain molecular foliar structures.

This dataset is a joined work of the RESPECT subprojects A1 (provided spectrally estimated leaf traits), B1 (provided leaf traits derived from conventional measurement techniques), and B4 (provided herbivory data).