Abstract:

Abstract:

For the seedling transplantation experiment conducted in NUMEX plots in Bombuscaro using as a target species Pouteria torta for monitoring during one year the effects of fertilization in a common species. This data set correspond to the initial measurements of the experiment

Abstract:

Soil data of NUMEX plots measured in 2013. Percentage of C and N, as well as soil pH were determined.

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:

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:

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:

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

Abstract:

Roots were collected at all NUMEX Plots (ECSF) in January 2009, except Ca treatments. 3 subplots were sampled per plot. Roots were stained with Trypan Blue and the percentage of root colonization determined using the line-intersect method.

Abstract:

Abstract:

Measurement of arbuscular mycorrhizal (AMF) abundance in the NUMEX plots at all elevational sites. AMF root colonization, hyphal length, spore counts and NLFA 16:1w5 marker in soil were determined. Additionally, we quantified non-mycorrhizal fungal root colonization and hyphal length.